Every change Wellknown observed on this MCP server, newest first, with what it was before and what it became. Tool-surface changes carry the definition diff. Nothing here is edited after the fact.
Live → Recently observed
Changed the definition of "offers.list"
⟨20 unchanged words⟩ "minimum":1,"type":"integer"},"offset":{"default":0,"description":"Zero-based index of first matching record; use next_offset to retrieve the next page.","maximum":1000000,"minimum":0,"type":"integer"},"query":{"description":"Optional bounded search text. ⟨6 unchanged words⟩
⟨6 unchanged words⟩ {"free":{"type":"boolean"},"next_offset":{"anyOf":[{"minimum":0,"type":"integer"},{"type":"null"}]},"offers":{"items":{"additionalProperties":true," ⟨10 unchanged words⟩ "},"payment_started":{"type":"boolean"},"total":{"minimum":0,"type":"integer"}},"required":["offers","total","next_offset","free","payment_started"],"type":"object"}
Recently observed → Live
Added "hash.encode", "json.repair", "pii.scan" and 2 more (21 tools before, 26 now)
Purchase SHA-256 Text Hash — PAID $0.01 USDC on Base via x402. Computes a SHA-256 digest and UTF-8 byte count for supplied text. Calling this MCP tool returns a payment challenge and does not autonomously spend funds.
Purchase Conservative JSON Repair — PAID $0.01 USDC on Base via x402. Validates JSON and repairs a limited set of formatting errors. May return supplied content. Calling this MCP tool returns a payment challenge and does not autonomously spend funds.
Purchase PII Pattern Scan — PAID $0.01 USDC on Base via x402. Detects selected personal-data patterns and returns classifications and positions, not matched values. Heuristic, not comprehensive. Calling this MCP tool returns a payment challenge and does not autonomously spend funds.
Purchase Prompt Heuristic Audit — PAID $0.01 USDC on Base via x402. Scores selected prompt structure signals using deterministic heuristics. Calling this MCP tool returns a payment challenge and does not autonomously spend funds.
Live → Recently observed
Recently observed → Live
Live → Recently observed
Recently observed → Live
Live → Recently observed
Recently observed → Live
Live → Recently observed
Recently observed → Live
Changed the definition of "artifact.integrity_manifest"
⟨42 unchanged words⟩ },"minItems":1,"type":"array"},"idempotency_key":{"maxLength":160,"minLength":8,"type":"string"},"payment_payload":{"additionalProperties":{},"type":"object"}},"required":["artifacts"],"type":"object"}
Live → Recently observed
Recently observed → Live
Live → Recently observed
Added "capability.get", "capability.search", "catalog.list" and 6 more; removed "capability.execute"; changed the definition of "artifact.integrity_manifest", "cost.estimate", "execution.preflight" and 9 more (13 tools before, 21 now)
⟨42 unchanged words⟩ },"minItems":1,"type":"array"},"idempotency_key":{"maxLength":160,"minLength":8,"type":"string"},"payment_payload":{"additionalProperties":{},"type":"object"}},"required":["artifacts"],"type":"object"}
before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"asset":{"type":["string","null"]},"capability":{"type":"string"},"confirmation_expectations":{"type":"string"},"execution_mode":{"type":"string"},"execution_url":{"type":["string","null"]},"input":{"additionalProperties":true,"properties":{},"type":"object"},"instruction":{"type":"string"},"network":{"type":["string","null"]},"pay_to":{"type":["string","null"]},"payment_required":{"const":true,"type":"boolean"},"payment_required_header":{"type":"string"},"price":{"type":["string","null"]},"settlement_expectations":{"type":"string"}},"required":["payment_required","execution_mode","capability","input","price","asset","network","pay_to","execution_url","payment_required_header","settlement_expectations","confirmation_expectations","instruction"],"type":"object"}Recently observed → Live
Live → Recently observed
Recently observed → Live
Added "capability.execute"; changed the definition of "artifact.integrity_manifest" (12 tools before, 13 now)
⟨42 unchanged words⟩ },"minItems":1,"type":"array"},"idempotency_key":{"maxLength":160,"minLength":8,"type":"string"},"payment_payload":{"additionalProperties":{},"type":"object"}},"required":["artifacts"],"type":"object"}
Execute a governed commercial capability — Executes an authorized capability contract through the canonical machine-commerce and Gate 1B path.
Live → Recently observed
Recently observed → Live
Added "cost.estimate", "execution.preflight", "offers.list" and 3 more (6 tools before, 12 now)
cost.estimate — FREE read-only cost estimate. This tool never creates checkout, reserves funds, or contacts a facilitator.
execution.preflight — FREE read-only execution preflight. Returns READY_FOR_HUMAN_AUTHORIZATION only; it never authorizes, purchases, settles, executes, or creates records.
offers.list — FREE read-only public offer and capability discovery. This tool never starts payment or execution.
provider.describe — FREE read-only provider and commerce policy discovery. Use this before selecting an offer or capability.
requirements.check — FREE read-only requirements check. This tool never authorizes or starts payment or execution.
Live → Recently observed
Recently observed → Live
Live → Recently observed
Recently observed → Live
Live → Recently observed
Recently observed → Live
Live → Recently observed
Removed "capability.get", "capability.search", "catalog.list" and 21 more; changed the definition of "xkey.validate" (30 tools before, 6 now)
PAIDboundedprepaid-credit XKEY intake validation. Requires an authenticatedprepaid-creditck_ principal,an 8-160 character idempotency key,and2-100000 characters of raw intake;commits one creditis committedonly on verifiedsuccess, while safe validation failures release the reservation. Do not callsuccess.speculatively;Discoveryuseis
Added "artifact.integrity_manifest", "machine_commerce.readiness_audit", "mcp.schema_audit" and 2 more (25 tools before, 30 now)
Purchase Artifact Integrity Manifest — PAID $0.10 USDC on Base via x402. Creates deterministic SHA-256 entries and a root manifest hash for supplied text artifacts. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Purchase Machine-Commerce Readiness Audit — PAID $2.00 USDC on Base via x402. Checks machine-commerce discovery and health surfaces. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Purchase MCP Schema Audit — PAID $1.00 USDC on Base via x402. Scores supplied MCP tool schemas for discoverability, descriptions, and bounded input contracts. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Purchase OpenAPI Quality Audit — PAID $1.00 USDC on Base via x402. Evaluates structural quality and required fields in an OpenAPI document. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
Recently observed → Live
Added "credit.options", "machine_capability.list", "machine_capability.quote" and 4 more; removed "capabilities.list", "capability.purchase", "capability.quote" and 13 more; changed the definition of "capability.get", "capability.search", "catalog.list" and 10 more (34 tools before, 25 now)
⟨5 unchanged words⟩ properties":{"capabilityId":{"$ref":"#/properties/name","description":"Exact marketplace capability identifier. Use either capabilityId or name, never both."},"name":{"description":"Exact deterministic first-party machine capability name. Use either name or capabilityId, never both.","pattern":"^[A-Za-z0-9][A-Za-z0-9._:-]{0 ⟨6 unchanged words⟩
FREE.FREE,
Live → Recently observed
Added "capability.purchase", "capability.register", "capability.search" and 13 more; changed the definition of "capability.get" (18 tools before, 34 now)
FREE, read-only x402 capability detail lookup. Supply the exactFREE.capabilityUse namereturned by capabilities.list to receiveforonelegacy deterministic capabilitydefinition and advertised price; no paymentmetadata orexecution occurs. UsecapabilityIdcapability.quoteforwhenpublicx402
Recently observed → Live
Live → Recently observed
Recently observed → Live
Added "cost.estimate", "credits.options", "execution.preflight" and 7 more; removed "check_requirements", "crossingkey.describe", "discover_provider" and 15 more; changed the definition of "capabilities.list", "capability.get", "capability.quote" and 5 more (26 tools before, 18 now)
FREE.FREE,Listsread-onlydeterministicx402paidcapability list. Use this only for deterministic machine-commerce capabilitieswithoutpricedexecutingforthem.x402 execution; it does not list the full CrossingKey offer/service catalog and never executes a capability. For public offers use offers.list.
Live → Recently observed
Recently observed → Live
Live → Recently observed
Added "payment.verify_onchain" (25 tools before, 26 now)
Verify Base USDC payment on chain — FREE READ-ONLY. Independently verifies a CrossingKey Base mainnet USDC transfer using Base JSON-RPC and optionally reconciles an existing receipt.
Recently observed → Live
Live → Recently observed
Recently observed → Live
Live → Recently observed
Recently observed → Live
Certificate recorded, valid to 2026-11-16
Authorization not required
First tool surface recorded: 25 tools (server version 2.1.0)
Showing the latest 53 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
Purchase Secret Pattern Scan — PAID $0.01 USDC on Base via x402. Detects selected credential patterns and returns classifications and positions, not matched values. Heuristic, not comprehensive. Calling this MCP tool returns a payment challenge and does not autonomously spend funds.
before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"cost":{"anyOf":[{"additionalProperties":true,"properties":{},"type":"object"},{"type":"null"}]},"cost_state":{"type":"string"},"found":{"type":"boolean"},"item_id":{"type":"string"},"payment_required":{"type":"boolean"},"payment_started":{"type":"boolean"}},"required":["item_id","found","cost_state","payment_required"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"authorization_required":{"type":"boolean"},"checks":{"additionalProperties":true,"properties":{},"type":"object"},"entitlement_created":{"type":"boolean"},"execution_started":{"type":"boolean"},"item_id":{"type":"string"},"payment_started":{"type":"boolean"},"reason":{"type":"string"},"receipt_created":{"type":"boolean"},"requirements_satisfied":{"type":"boolean"},"state":{"type":"string"}},"required":["item_id","state","requirements_satisfied","authorization_required","payment_started","execution_started","entitlement_created","receipt_created","reason","checks"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"asset":{"type":["string","null"]},"capability":{"type":"string"},"confirmation_expectations":{"type":"string"},"execution_mode":{"type":"string"},"execution_url":{"type":["string","null"]},"input":{"additionalProperties":true,"properties":{},"type":"object"},"instruction":{"type":"string"},"network":{"type":["string","null"]},"pay_to":{"type":["string","null"]},"payment_required":{"const":true,"type":"boolean"},"payment_required_header":{"type":"string"},"price":{"type":["string","null"]},"settlement_expectations":{"type":"string"}},"required":["payment_required","execution_mode","capability","input","price","asset","network","pay_to","execution_url","payment_required_header","settlement_expectations","confirmation_expectations","instruction"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"asset":{"type":["string","null"]},"capability":{"type":"string"},"confirmation_expectations":{"type":"string"},"execution_mode":{"type":"string"},"execution_url":{"type":["string","null"]},"input":{"additionalProperties":true,"properties":{},"type":"object"},"instruction":{"type":"string"},"network":{"type":["string","null"]},"pay_to":{"type":["string","null"]},"payment_required":{"const":true,"type":"boolean"},"payment_required_header":{"type":"string"},"price":{"type":["string","null"]},"settlement_expectations":{"type":"string"}},"required":["payment_required","execution_mode","capability","input","price","asset","network","pay_to","execution_url","payment_required_header","settlement_expectations","confirmation_expectations","instruction"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"free":{"type":"boolean"},"offers":{"items":{"additionalProperties":true,"properties":{"id":{"type":"string"}},"required":["id"],"type":"object"},"type":"array"},"payment_started":{"type":"boolean"}},"required":["offers","free","payment_started"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"asset":{"type":["string","null"]},"capability":{"type":"string"},"confirmation_expectations":{"type":"string"},"execution_mode":{"type":"string"},"execution_url":{"type":["string","null"]},"input":{"additionalProperties":true,"properties":{},"type":"object"},"instruction":{"type":"string"},"network":{"type":["string","null"]},"pay_to":{"type":["string","null"]},"payment_required":{"const":true,"type":"boolean"},"payment_required_header":{"type":"string"},"price":{"type":["string","null"]},"settlement_expectations":{"type":"string"}},"required":["payment_required","execution_mode","capability","input","price","asset","network","pay_to","execution_url","payment_required_header","settlement_expectations","confirmation_expectations","instruction"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"manifest":{"additionalProperties":true,"properties":{},"type":"object"},"provider":{"additionalProperties":true,"properties":{},"type":"object"},"sequence":{"items":{"type":"string"},"type":"array"},"stopBeforePayment":{"const":true,"type":"boolean"}},"required":["provider","sequence","manifest","stopBeforePayment"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"delivery_ready":{"type":["boolean","null"]},"found":{"type":"boolean"},"item_id":{"type":"string"},"payment_required":{"type":"boolean"},"requirements":{"items":{"type":"string"},"type":"array"},"type":{"type":"string"}},"required":["item_id","found","requirements","payment_required"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"found":{"type":"boolean"},"item_id":{"type":"string"},"payment_started":{"type":"boolean"},"preview_state":{"type":"string"},"result_preview":{"additionalProperties":true,"properties":{},"type":"object"}},"required":["item_id","found","preview_state"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"asset":{"type":["string","null"]},"capability":{"type":"string"},"confirmation_expectations":{"type":"string"},"execution_mode":{"type":"string"},"execution_url":{"type":["string","null"]},"input":{"additionalProperties":true,"properties":{},"type":"object"},"instruction":{"type":"string"},"network":{"type":["string","null"]},"pay_to":{"type":["string","null"]},"payment_required":{"const":true,"type":"boolean"},"payment_required_header":{"type":"string"},"price":{"type":["string","null"]},"settlement_expectations":{"type":"string"}},"required":["payment_required","execution_mode","capability","input","price","asset","network","pay_to","execution_url","payment_required_header","settlement_expectations","confirmation_expectations","instruction"],"type":"object"}before
—after
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"balance":{},"capability":{"type":"string"},"credits_charged":{},"normalized":{},"receipt_id":{"type":["string","null"]},"request_hash":{"type":["string","null"]},"reservation_id":{"type":["string","null"]},"state":{"type":"string"},"success":{"type":"boolean"}},"required":["capability","state","success"],"type":"object"}{"destructiveHint":false,"idempotentHint":true,"openWorldHint":false,"readOnlyHint":false}
capability.get — FREE. Use name for legacy deterministic capability metadata or capabilityId for public marketplace metadata, rights and provenance.
capability.search — FREE MARKETPLACE FILTERED DISCOVERY ONLY. Search active public marketplace capabilities when one or more filters are known: text, category, provider, delivery type, or price. Metadata is free; purchased execution and deliverables are not. Do NOT use for unfiltered browsing; use catalog.list. Do NOT use for CrossingKey digital/service offers; use offers.list. For one exact capabilityId use capability.get.
catalog.list — FREE MARKETPLACE UNFILTERED DISCOVERY ONLY. Page through active public marketplace capabilities when no search filters are needed. Metadata is free; execution, entitlement, delivery, and purchased output remain gated. Do NOT use for filtered discovery; use capability.search. Do NOT use for CrossingKey digital/service offers; use offers.list. For one exact capabilityId use capability.get.
commerce.quote — FREE MARKETPLACE PAYMENT QUOTE ONLY. After selecting an active marketplace capabilityId, return authoritative gross price, CrossingKey fee, provider share, and x402 v1/v2 payment requirements. A quote grants no entitlement and performs no execution. Do NOT use for first-party paid capabilities; use cost.estimate (first-party x402 capabilities have fixed catalog prices and no quote stage). Do NOT use for generic price lookup; use cost.estimate. Paid marketplace execution requires capability.purchase with authorization and verified payment.
creator.apply — FREE WRITE. Private creator intake for assets needing a capability model. No ownership transfer and AI training defaults false.
credits.options — FREE read-only prepaid request-credit pack options. Lists available credit packs with identifiers and credit amounts. Purchasing happens via checkout; this tool never starts payment or creates accounts.
marketplace.describe — FREE, read-only marketplace overview. Use this first for marketplace-specific capability commerce, fee policy, creator rights, payment rails, and active catalog counts; use provider.describe for the broader CrossingKey provider and legacy offer surface.
provider.get — FREE. Public active provider metadata. Pending applications require owner or administrator authorization.
provider.register — FREE public intake. Submit a pending marketplace provider application; this creates no credential, approval, payment, ownership transfer, or active capability. Use creator.apply instead when submitting an asset or body of work that still needs a capability model.
Execute a governed commercial capability — Executes an authorized capability contract through the canonical machine-commerce and Gate 1B path.
result.preview — FREE read-only result-shape preview. This tool never executes a capability or creates an entitlement or receipt.
⟨6 unchanged words⟩ :{"idempotency_key":{"description":"Unique client-generatedkey for safeidempotencyretry/deduplication;key; 8-160 ASCII characters.Reuse only when retrying the same intake.","maxLength":160,"minLength":8,"pattern ⟨28 unchanged words⟩
FREE. Use name for legacy deterministic capability metadata or capabilityId for public marketplace metadata, rights and provenance.
FREE, read-only marketplace search. Use this for filtered discovery of active public marketplace capabilities by text, category, provider, delivery type, or price; use catalog.list for unfiltered browsing and capability.get for one exact identifier.
FREE, read-only marketplace browse. Use this to page through active public marketplace capabilities without search criteria; use capability.search for filtering and capability.get for exact metadata.
FREE, read-only marketplace purchase quote. Supply a marketplace capabilityId to receive exact gross price, CrossingKey fee, provider share, and x402 v1/v2 requirements; no payment occurs. For deterministic first-party machine capabilities use machine_capability.quote.
Estimate exact known cost — FREE, read-only cross-domain price lookup. Supply an offer or capability identifier to return the currently advertised USD price or request-credit cost; no payment, reservation, or credit consumption occurs. For x402 challenge terms use machine_capability.quote instead.
FREE WRITE. Private creator intake for assets needing a capability model. No ownership transfer and AI training defaults false.
Get request-credit payment links — FREE, read-only prepaid-credit purchase discovery. Returns available request-credit packs and their existing Stripe Payment Links; it does not open a checkout session or spend funds. Use this only when prepaid request credits are the intended payment rail.
FREE, read-only entitlement inspection. Supply a CrossingKey entitlement identifier to return current entitlement state without granting execution, download access, or paid result content. Use purchase.status when only an idempotency key is available.
Preflight an agent purchase or execution — FREE, read-only final preflight before any paid action. Supply an offer or capability identifier to receive payment method, exact advertised price, readiness, safety warnings, and next action; this tool never charges or executes. Call it after discovery and requirement checks, not as a replacement for paid execution.
FREE, read-only x402 capability list. Use this only for deterministic machine-commerce capabilities priced for x402 execution; it does not list the full CrossingKey offer/service catalog and never executes a capability. For public offers use offer.list.
FREE, read-only x402 quote/challenge lookup. Supply the exact capability name returned by machine_capability.list to receive v1 and v2 payment requirements without execution or settlement. Use capability.get for metadata only and execution.preflight for the cross-domain authorization decision.
FREE, read-only marketplace overview. Use this first for marketplace-specific capability commerce, fee policy, creator rights, payment rails, and active catalog counts; use provider.describe for the broader CrossingKey provider and legacy offer surface.
Discover CrossingKey offers — FREE, read-only canonical offer search. Use this to find public digital or service offers by query, kind, or maximum USD price before payment; it returns metadata only and creates no checkout session. Use capability.get only for x402 capability detail; offer details are returned by offer.list.
FREE, read-only payment-rail discovery. Returns supported Stripe, prepaid-credit, and x402 rails plus the receiver-only wallet authority boundary; it never signs or spends. Use this when selecting a payment rail before any authorization step.
Verify Base USDC payment on chain — FREE, read-only Base USDC verification. Provide a Base transaction hash, a CrossingKey receipt ID, or both to verify the receiver transfer and optionally reconcile an existing receipt; it never signs, sends, settles, swaps, bridges, or spends funds. Use receipt.verify for local receipt integrity without chain lookup.
Discover CrossingKey Intelligence — FREE, read-only provider discovery. Use this first to learn CrossingKey identity, commerce model, payment rails, authority boundaries, and recommended next actions; it never creates a payment or executes paid work. For offer-specific data use offer.list and capability.get, and for x402 terms use capability.get/machine_capability.quote.
FREE. Public active provider metadata. Pending applications require owner or administrator authorization.
FREE public intake. Submit a pending marketplace provider application; this creates no credential, approval, payment, ownership transfer, or active capability. Use creator.apply instead when submitting an asset or body of work that still needs a capability model.
FREE, read-only x402 purchase-status lookup. Supply the original idempotency key to retrieve purchase state and integrity identifiers without revealing paid result content or changing state. The response includes purchase, entitlement, and result-integrity identifiers when available.
FREE, read-only receipt integrity verification. Supply a CrossingKey receipt object to recompute and compare its deterministic result hash; this performs no payment, entitlement mutation, or network settlement. A true result verifies integrity only, not external payment finality.
Check purchase or execution requirements — FREE, read-only prerequisite check. Supply an offer or capability identifier to receive payment, authorization, fulfillment, and idempotency requirements without creating a payment. Use execution.preflight for the final machine-readable go/no-go decision.
Preview result or fulfillment schema — FREE, read-only result preview. Supply an offer or capability identifier to see the expected fulfillment or output shape without exposing paid content or executing work. Use this after offer.list or machine_capability.list when an agent needs to evaluate the result contract before authorization.
List paid request services — FREE, read-only service catalog. Returns only request services explicitly approved by the server's safety process and may legitimately be empty; it creates no order or payment. Use this when evaluating approved request-service availability.
FREE, read-only MCP readiness check. Returns service, Stripe, machine-commerce, mainnet-gate, and receiver-only wallet readiness flags without contacting payment rails or changing state. Use this for operational readiness, not purchase status.
Purchase x402 Compatibility Audit — PAID $1.00 USDC on Base via x402. Audits an x402 endpoint for v1/v2 compatibility defects. Calling this MCP tool does not spend funds; it returns the exact PAYMENT-REQUIRED challenge and canonical paid execution endpoint.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"category":{"description":"Optional exact marketplace category identifier.","pattern":"^[A-Za-z0-9][A-Za-z0-9._:-]{0,159}$","type":"string"},"deliveryType":{"description":"Optional capability delivery-type filter.","enum":["mcp_tool","api","digital_asset", ⟨7 unchanged words⟩ string"},"limit":{"default":25,"description":"Maximum number of results to return; 1-100, defaults to 25.","maximum":100,"minimum":1,"type":"integer"},"maxPrice":{"$ref":"#/properties/minPrice","description":"Optional inclusive maximum USDC price in atomic units."},"minPrice":{"description":"Optional inclusive minimum USDC price in atomic units.","pattern":"^(0|[1-9][0-9]{0, ⟨3 unchanged words⟩ string"},"offset":{"default":0,"description":"Zero-based result offset; defaults to 0.","maximum":10000,"minimum":0,"type":"integer"},"provider":{"$ref":"#/properties/category","description":"Optional exact provider identifier."},"query":{"description":"Optional case-insensitive search text across capability name, description, and category; maximum 160 characters.","maxLength":160,"type":"string"}},"type":"object"}
FREE.FREE,Paginatedread-only marketplace browse. Use this to page through active public marketplacecapabilities;capabilitiesplannedwithout search criteria; use capability.search for filtering andprivatecapability.getcapabilitiesforareexactexcluded.metadata.
⟨5 unchanged words⟩ properties":{"limit":{"default":25,"description":"Maximum number of results to return; 1-100, defaults to 25.","maximum":100,"minimum":1,"type":"integer"},"offset":{"default":0,"description":"Zero-based result offset; defaults to 0.","maximum":10000,"minimum":0,"type" ⟨3 unchanged words⟩
FREE.FREE,Exactread-only marketplace purchase quote. Supply a marketplace capabilityId to receive exact gross price,platformCrossingKey fee, provider share, and x402 v1/v2requirements.requirements;Nonocharge.paymentHumanoccurs.authorizationForrequireddeterministicbeforefirst-partypurchase.machine capabilities use machine_capability.quote.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"capabilityId":{"description":"Exact active public marketplace capability identifier to quote.","pattern":"^[A-Za-z0-9][A-Za-z0-9._:-]{0, ⟨8 unchanged words⟩
⟨25 unchanged words⟩ credit consumption occurs. For x402 challenge terms usecapability.quotemachine_capability.quote instead.
⟨5 unchanged words⟩ properties":{"provider":{"additionalProperties":false,"description":"Proposed provider identity for this private creator intake.","properties":{"contact":{"description":"Private provider contact reference used for intake and operator follow-up; 3-300 characters.","maxLength":300,"minLength":3,"type":"string"},"description":{"description":"Public provider description; 1-2000 characters.","maxLength":2000,"minLength":1,"type":"string"},"displayName":{"description":"Public provider display name; 1-120 characters.","maxLength":120,"minLength":1,"type":"string"},"slug":{"description":"Stable provider slug used for human-readable identity and duplicate checks.","pattern":"^[A-Za-z0-9][A-Za-z0-9._:-]{0,159}$","type":"string"},"website":{"description":"Optional public HTTPS/HTTP provider website URL.","format":"uri","maxLength":500,"type" ⟨6 unchanged words⟩ ],"type":"object"},"summary":{"description":"Private creator intake summary describing the asset, service, or capability to evaluate; 1-4000 characters.","maxLength":4000,"minLength":1,"type": ⟨6 unchanged words⟩
FREE.FREE,Marketplaceread-onlytypesmarketplace overview. Use this first for marketplace-specific capability commerce,feesfee policy, creator rights,supportedpayment rails, and active catalogcounts.counts; use provider.describe for the broader CrossingKey provider and legacy offer surface.
⟨26 unchanged words⟩ or executes paid work. For offer-specific data useoffers.listoffer.list and capability.get, and for x402 terms usecapability.get/capability.quote.capability.get/machine_capability.quote.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"providerId":{"description":"Exact CrossingKey marketplace provider identifier.","pattern":"^[A-Za-z0-9][A-Za-z0-9._:-]{0, ⟨8 unchanged words⟩
FREEWRITE.public intake. Submit a pending marketplace providerapplication.application;Nothisautomaticcreates no credential, approval,credentialpayment,issuanceownership transfer, ortransferactive capability. Use creator.apply instead when submitting an asset or body ofownership.work that still needs a capability model.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"contact":{"description":"Private provider contact reference used for intake and operator follow-up; 3-300 characters.","maxLength":300,"minLength":3,"type":"string"},"description":{"description":"Public provider description; 1-2000 characters.","maxLength":2000,"minLength":1,"type":"string"},"displayName":{"description":"Public provider display name; 1-120 characters.","maxLength":120,"minLength":1,"type":"string"},"slug":{"description":"Stable provider slug used for human-readable identity and duplicate checks.","pattern":"^[A-Za-z0-9][A-Za-z0-9._:-]{0,159}$","type":"string"},"website":{"description":"Optional public HTTPS/HTTP provider website URL.","format":"uri","maxLength":500,"type ⟨8 unchanged words⟩
⟨11 unchanged words⟩ key used for the paid x402 purchase; 8-160 ASCII characters.","maxLength":160,"minLength":8," ⟨11 unchanged words⟩
⟨20 unchanged words⟩ paid content or executing work. Use this afteroffers.listoffer.list orcapabilities.listmachine_capability.list when an agent needs to evaluate the result contract before authorization.
⟨32 unchanged words⟩ release the reservation. Do not call speculatively; userequirements.checkrequirement.check and execution.preflight first.
⟨8 unchanged words⟩ :"Unique client-generated key for safe retry/deduplication; 8-160 ASCII characters. Reuse only when retrying the same intake." ⟨33 unchanged words⟩
Get request-credit payment links — FREE, read-only prepaid-credit purchase discovery. Returns available request-credit packs and their existing Stripe Payment Links; it does not open a checkout session or spend funds. Use this only when prepaid request credits are the intended payment rail.
FREE, read-only x402 capability list. Use this only for deterministic machine-commerce capabilities priced for x402 execution; it does not list the full CrossingKey offer/service catalog and never executes a capability. For public offers use offer.list.
FREE, read-only x402 quote/challenge lookup. Supply the exact capability name returned by machine_capability.list to receive v1 and v2 payment requirements without execution or settlement. Use capability.get for metadata only and execution.preflight for the cross-domain authorization decision.
Discover CrossingKey offers — FREE, read-only canonical offer search. Use this to find public digital or service offers by query, kind, or maximum USD price before payment; it returns metadata only and creates no checkout session. Use capability.get only for x402 capability detail; offer details are returned by offer.list.
Check purchase or execution requirements — FREE, read-only prerequisite check. Supply an offer or capability identifier to receive payment, authorization, fulfillment, and idempotency requirements without creating a payment. Use execution.preflight for the final machine-readable go/no-go decision.
List paid request services — FREE, read-only service catalog. Returns only request services explicitly approved by the server's safety process and may legitimately be empty; it creates no order or payment. Use this when evaluating approved request-service availability.
FREE, read-only MCP readiness check. Returns service, Stripe, machine-commerce, mainnet-gate, and receiver-only wallet readiness flags without contacting payment rails or changing state. Use this for operational readiness, not purchase status.
FREE, read-only x402 capability list. Use this only for deterministic machine-commerce capabilities priced for x402 execution; it does not list the full CrossingKey offer/service catalog and never executes a capability. For public offers use offers.list.
PAID. Canonical marketplace purchase with a signed x402 payment and a prior buyer-bound human approval. Quote first. Payment is settled before bounded execution; failures retain receipts and dispute accounting. Background tasks forbidden.
FREE, read-only x402 quote/challenge lookup. Supply the exact capability name returned by capabilities.list to receive v1 and v2 payment requirements without execution or settlement. Use capability.get for metadata only and execution.preflight for the cross-domain authorization decision.
FREE PROVIDER WRITE. Register a planned capability with price in USDC atomic units and affirmed commercialization rights. Owner authorization required.
FREE ADMIN WRITE. Activate only an approved provider capability with a configured, validated execution adapter. Changing visibility to public publishes metadata.
Get request-credit payment links — FREE, read-only prepaid-credit purchase discovery. Returns available request-credit packs and their existing Stripe Payment Links; it does not open a checkout session or spend funds. Use this only when prepaid request credits are the intended payment rail.
FREE, read-only MCP readiness check. Returns service, Stripe, machine-commerce, mainnet-gate, and receiver-only wallet readiness flags without contacting payment rails or changing state. Use this for operational readiness, not purchase status.
FREE AUTHENTICATED. Buyer, provider or administrator job status without inputs, outputs or payment credentials.
Discover CrossingKey offers — FREE, read-only canonical offer search. Use this to find public digital or service offers by query, kind, or maximum USD price before payment; it returns metadata only and creates no checkout session. Use capability.get only for x402 capability detail; offer details are returned by offers.list.
FREE ADMIN WRITE. Change provider approval status using authenticated administrator authority.
FREE AUTHENTICATED. Compatible receipt plus marketplace allocation for the authorized buyer; legacy receipts require an operator-bound payer identity.
Check purchase or execution requirements — FREE, read-only prerequisite check. Supply an offer or capability identifier to receive payment, authorization, fulfillment, and idempotency requirements without creating a payment. Use execution.preflight for the final machine-readable go/no-go decision.
List paid request services — FREE, read-only service catalog. Returns only request services explicitly approved by the server's safety process and may legitimately be empty; it creates no order or payment. Use this when evaluating approved request-service availability.
FREE AUTHENTICATED. Provider or administrator accounting balances separated by network and currency. No payout or treasury spending.
FREE AUTHENTICATED. Paginated post-sale revenue allocations for the provider or administrator.
FREE ADMIN WRITE. Record evidence of a separately human-authorized completed settlement. Accounting only; this tool never transfers funds.
{"$schema":"http://json-schema.org/draft-07/schema#","additionalProperties":false,"properties":{"namecapabilityId":{"description$ref":"Exact deterministic x402 capability name returned by capabilities.list; 1-160 characters.#/properties/name"},"maxLengthname":160,{"minLengthpattern":1"^[A-Za-z0-9][A-Za-z0-9._:-]{0,159}$","type":"string"}},"required":["name"],"type":"object"}
PAID. Canonical marketplace purchase with a signed x402 payment and a prior buyer-bound human approval. Quote first. Payment is settled before bounded execution; failures retain receipts and dispute accounting. Background tasks forbidden.
FREE PROVIDER WRITE. Register a planned capability with price in USDC atomic units and affirmed commercialization rights. Owner authorization required.
FREE. Search active public capabilities by text, category, provider, delivery type and atomic-unit price range. Deterministic ranking.
FREE ADMIN WRITE. Activate only an approved provider capability with a configured, validated execution adapter. Changing visibility to public publishes metadata.
FREE. Paginated active public marketplace capabilities; planned and private capabilities are excluded.
FREE. Exact gross price, platform fee, provider share and x402 v1/v2 requirements. No charge. Human authorization required before purchase.
FREE WRITE. Private creator intake for assets needing a capability model. No ownership transfer and AI training defaults false.
FREE AUTHENTICATED. Buyer, provider or administrator job status without inputs, outputs or payment credentials.
FREE. Marketplace types, fees, creator rights, supported payment rails and active catalog counts.
FREE. Public active provider metadata. Pending applications require owner or administrator authorization.
FREE WRITE. Submit a pending provider application. No automatic approval, credential issuance or transfer of ownership.
FREE ADMIN WRITE. Change provider approval status using authenticated administrator authority.
FREE AUTHENTICATED. Compatible receipt plus marketplace allocation for the authorized buyer; legacy receipts require an operator-bound payer identity.
FREE AUTHENTICATED. Provider or administrator accounting balances separated by network and currency. No payout or treasury spending.
FREE AUTHENTICATED. Paginated post-sale revenue allocations for the provider or administrator.
FREE ADMIN WRITE. Record evidence of a separately human-authorized completed settlement. Accounting only; this tool never transfers funds.
FREE.FREE,Returnsread-only x402 capability detail lookup. Supply the exact capability name returned by capabilities.list to receive one deterministic capability definition andexactadvertisedprice.price; no payment or execution occurs. Use capability.quote when x402 challenge requirements are needed.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"name":{"description":"Exact deterministic x402 capability name returned by capabilities.list; 1-160 characters.","maxLength":160,"minLength":1,"type":" ⟨5 unchanged words⟩
FREE.FREE,Returnsread-only x402 quote/challenge lookup. Supply the exact capability name returned by capabilities.list to receive v1 and v2challengepayment requirements without execution or settlement. Use capability.get foronemetadatacapabilityonlywithoutandexecutingexecution.preflightorforsettlingthepayment.cross-domain authorization decision.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"name":{"description":"Exact deterministic x402 capability name returned by capabilities.list; 1-160 characters.","maxLength":160,"minLength":1,"type":" ⟨5 unchanged words⟩
FREESTATUS.,Inspectsread-only entitlementstateinspection.bySupply a CrossingKey entitlement identifier to return current entitlement state without granting execution, download access, or paid resultaccess.content. Use purchase.status when only an idempotency key is available.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"id":{"description":"CrossingKey entitlement identifier returned by a successful paid purchase; 1-200 characters.","maxLength":200,"minLength":1,"type":" ⟨5 unchanged words⟩
FREE.FREE,Returnsread-onlylocalMCP readiness check. Returns service, Stripe, machine-commerce, mainnet-gate, and receiver-only wallet readiness flagsandwithoutthecontactingmainnetpaymentsafety-gaterails or changing state. Use this for operational readiness, not purchase status.
FREE.FREE,Listsread-only payment-rail discovery. Returns supportedpaymentStripe,methodsprepaid-credit, andexplicitlyx402reportsrails plus the receiver-only walletboundary.authority boundary; it never signs or spends. Use this when selecting a payment rail before any authorization step.
FREE,STATUS.read-onlyReturnsx402 purchase-status lookup. Supply thestateoriginalofidempotencyakeymachine-commerceto retrieve purchasebystateitsandidempotencyintegritykeyidentifiers without revealing paid resultcontent.content or changing state. The response includes purchase, entitlement, and result-integrity identifiers when available.
⟨3 unchanged words⟩ additionalProperties":false,"properties":{"idempotency_key":{"description":"Original client-generated idempotency key used for the paid x402 purchase; 8-160 characters.","maxLength":160,"minLength":8,"pattern":"^[A-Za-z0-9._:-]+$","type":"string"}},"required":[ ⟨3 unchanged words⟩
FREE.FREE,Recomputesread-onlythereceipt integrity verification. Supply a CrossingKey receipt object to recompute and compare its deterministic resulthashhash;embeddedthisinperformsanoCrossingKeypayment,receipt.entitlement mutation, or network settlement. A true result verifies integrity only, not external payment finality.
⟨6 unchanged words⟩ ":{"receipt":{"additionalProperties":{},"description":"Complete CrossingKey receipt object whose deterministic integrity binding should be recomputed.","type":"object"}},"required":["receipt ⟨2 unchanged words⟩
Estimate exact known cost — FREE, read-only cross-domain price lookup. Supply an offer or capability identifier to return the currently advertised USD price or request-credit cost; no payment, reservation, or credit consumption occurs. For x402 challenge terms use capability.quote instead.
Get request-credit payment links — FREE, read-only prepaid-credit purchase discovery. Returns available request-credit packs and their existing Stripe Payment Links; it does not open a checkout session or spend funds. Use this only when prepaid request credits are the intended payment rail.
Preflight an agent purchase or execution — FREE, read-only final preflight before any paid action. Supply an offer or capability identifier to receive payment method, exact advertised price, readiness, safety warnings, and next action; this tool never charges or executes. Call it after discovery and requirement checks, not as a replacement for paid execution.
Discover CrossingKey offers — FREE, read-only canonical offer search. Use this to find public digital or service offers by query, kind, or maximum USD price before payment; it returns metadata only and creates no checkout session. Use capability.get only for x402 capability detail; offer details are returned by offers.list.
Verify Base USDC payment on chain — FREE, read-only Base USDC verification. Provide a Base transaction hash, a CrossingKey receipt ID, or both to verify the receiver transfer and optionally reconcile an existing receipt; it never signs, sends, settles, swaps, bridges, or spends funds. Use receipt.verify for local receipt integrity without chain lookup.
Discover CrossingKey Intelligence — FREE, read-only provider discovery. Use this first to learn CrossingKey identity, commerce model, payment rails, authority boundaries, and recommended next actions; it never creates a payment or executes paid work. For offer-specific data use offers.list and capability.get, and for x402 terms use capability.get/capability.quote.
Check purchase or execution requirements — FREE, read-only prerequisite check. Supply an offer or capability identifier to receive payment, authorization, fulfillment, and idempotency requirements without creating a payment. Use execution.preflight for the final machine-readable go/no-go decision.
Preview result or fulfillment schema — FREE, read-only result preview. Supply an offer or capability identifier to see the expected fulfillment or output shape without exposing paid content or executing work. Use this after offers.list or capabilities.list when an agent needs to evaluate the result contract before authorization.
List paid request services — FREE, read-only service catalog. Returns only request services explicitly approved by the server's safety process and may legitimately be empty; it creates no order or payment. Use this when evaluating approved request-service availability.
Validate structured XKEY intake — PAID bounded intake validation. Requires an authenticated prepaid-credit principal, an 8-160 character idempotency key, and 2-100000 characters of raw intake; one credit is committed only on verified success, while safe validation failures release the reservation. Do not call speculatively; use requirements.check and execution.preflight first.
Check purchase or execution requirements — FREE QUALIFICATION. Explains payment, authorization, fulfillment, and idempotency prerequisites.
FREE. Describes the receiver-only CrossingKey machine-commerce service and its safety boundaries.
Discover CrossingKey Intelligence — FREE DISCOVERY. Returns provider identity, commerce model, payment rails, policy, and next actions before payment.
Estimate exact known cost — FREE QUALIFICATION. Returns advertised USD price or request-credit cost without charging.
Preflight an agent purchase or execution — FREE QUALIFICATION. Final machine-readable no-charge decision point before payment or credit-consuming execution.
FREE STATUS. Returns fulfillment identifiers and integrity binding but does not disclose paid result content.
FREE STATUS. Returns fulfillment state and result hash by purchase idempotency key.
Check fulfillment readiness — Checks whether a Stripe offer has a verified delivery file bound to this server.
Get offer details — FREE QUALIFICATION. Returns enough information to evaluate one offer before paying.
Get request-credit payment links — Returns the live Stripe Payment Links for prepaid CrossingKey request credits.
Get Stripe checkout link — Returns the exact Stripe Payment Link for a known CrossingKey offer. Never invents a checkout URL.
List machine capabilities — FREE DISCOVERY. Lists free and paid capabilities with access and charging metadata.
Discover CrossingKey offers — FREE DISCOVERY. Searches public offer metadata before payment.
List paid request services — Lists request services approved after the safe-file scan. Empty until services are explicitly approved.
List CrossingKey Stripe offers — Lists the known CrossingKey Stripe Payment Links. Digital offers report whether the exact fulfillment file has been verified on this server.
Verify Base USDC payment on chain — FREE READ-ONLY. Independently verifies a CrossingKey Base mainnet USDC transfer using Base JSON-RPC and optionally reconciles an existing receipt.
Preview result or fulfillment schema — FREE QUALIFICATION. Shows expected result shape without revealing paid content.
Validate structured XKEY intake — Paid bounded intake validation. Costs 1 prepaid credit on verified success. Safe validation failures release the reserved credit.