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.
Changed the definition of "market_invoke"
⟨46 unchanged words⟩ next_steps saying how to pay. Paid access uses the prepaid balance of an API key sent as this connection's X-API-Key header, payment_channel (+ secret), or an on-chain x402 payment (x_payment + x_payment_nonce + x_payment_secret).
Added "x402_check" (12 tools before, 13 now)
Check a signed x402 USDC payment before submitting it: recovers the EIP-712 signer, runs USDC's own checks and the seller's (payTo, amount, asset, network), and when the signature fails names the domain it was really made for (e.g. Base Sepolia's 'USDC' used on Base, where USDC is 'USD Coin'). Costs $0.003 per call. The first 5 priced calls per caller are free.
Certificate changed, valid to 2026-12-28
Added "pipeline_refund", "pipeline_refund_prepare" and "pipeline_refund_status"; changed the definition of "pipeline_invoke" and "pipeline_prepare" (9 tools before, 12 now)
Execute or continue the SAME prepared graph. Submitbuyer-signedauthorizationstransactionswhenforthepaidsignedstepsquote enables gas_sponsorship, otherwise buyer-signed transactions; none for free steps. Never submit both payment modes. Retain run_id/access_token and the exact bundle. Pending is ⟨18 unchanged words⟩
Added "pipeline_invoke", "pipeline_prepare" and "pipeline_status" (6 tools before, 9 now)
Execute or continue the SAME prepared graph. Submit buyer-signed transactions for paid steps, none for free steps. Retain run_id/access_token and the exact bundle. Pending is not failure; repeat the same run or read pipeline_status. Never create a replacement purchase after a lost response.
Validate a graph and return a signed quote and payment offers. No work or payment. Free steps require no wallet; paid steps require buyer wallet address. Inspect ready/blockers. Sign offers LOCALLY, never provide a private key. Then call pipeline_invoke.
Read an existing pipeline, including cached signed result, without broadcasting payments or invoking providers. No wallet signer or blockchain RPC required. Inspect recovery.action for unresolved work.
Changed the definition of "market_invoke"
⟨57 unchanged words⟩ or an on-chain x402 payment (x_payment + x_payment_nonce + x_payment_secret).
⟨157 unchanged words⟩ that x_payment pays.","type":"string"},"x_payment_secret":{"description":"The payment_secret from that 402. The nonce and the transaction are public once mined; the secret is what shows you are the one who paid.","type":"string"}},"required":["product_id","capability_id"],"type":"object"}
Added "air_quality_now", "fair_random", "nearby_sensors" and 1 more; changed the definition of "market_invoke" and "market_search" (2 tools before, 6 now)
⟨36 unchanged words⟩ and this reports that rather than inventing aresult.result, with next_steps saying how to pay. Paid access uses payment_channel (+ secret)and,orforanescrowon-chainchannels,x402apaymentpayment_authorization(x_paymentobject.+ x_payment_nonce).
Certificate recorded, valid to 2026-10-28
Authorization not required
First tool surface recorded: 2 tools (server version 1.0.1)
Showing the latest 10 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
⟨9 unchanged words⟩ "Access Token","type":"string"},"authorizations":{"anyOf":[{"additionalProperties":{"pattern":"^0x[0-9a-fA-F]{130}$","type":"string"},"maxProperties":16,"type":"object"},{"type":"null"}],"default":null,"title":"Authorizations"},"run_id":{"pattern":"^paid_[0-9a-f]{32} ⟨34 unchanged words⟩
⟨18 unchanged words⟩ no wallet; paid steps require buyer wallet address. Use gas_mode=required to demand gas sponsorship or auto to prefer it. Inspectready/blockers.ready/blockers and gas_sponsorship. Sign offers LOCALLY, never provide a private key. Then call pipeline_invoke.
⟨95 unchanged words⟩ "type":"object"}},"properties":{"gas_mode":{"default":"buyer","enum":["buyer","auto","required"],"title":"Gas Mode","type":"string"},"max_budget_usd":{"anyOf":[{"maximum":100000, ⟨42 unchanged words⟩
Submit the original seller's refund authorization or resume the SAME refund. The recipient is the original buyer, amount is the paid step price, and the sponsor pays gas. Preserve the exact authorization after a lost response. Returns a separately signed credit note; the original bill is unchanged.
Prepare a cash refund for a verified paid step of a finished pipeline. This moves no money. The original seller must approve the exact EIP-3009 authorization locally; never send a private key. Refunds require seller cooperation and a configured gas sponsor.
Read the saved cash-refund status and signed credit note without broadcasting a transaction. No private key or RPC is required. Pending means resume the same refund, never send a replacement transfer.
⟨6 unchanged words⟩ from market_search.","type":"string"},"include_full_receipt":{"description":"Return the hub's raw response, including the full hybrid Ed25519 + ML-DSA-65 receipt signature (about 7 KB).","type":"boolean"},"input":{"description":"Input object for the ⟨9 unchanged words⟩ Atomic total-price ceiling. Copy the selected search result'spricemax_price_usd here; the Hub returns price_limit_exceeded before work or ⟨53 unchanged words⟩ look for the capability locally and answer 404.","type":"string"},"x_payment":{"description":"x402 seller-direct payment: the hash of the USDC transfer you broadcast for the 402's invoice (see next_steps).","type":"string"},"x_payment_nonce":{"description":"The invoice nonce from the 402 that x_payment pays.","type":"string"}},"required": ⟨4 unchanged words⟩
Search this hub'scapabilitycataloguebyofintent.liveOptionaldatacategoryand(e.g.computationsecurity)byandwhatbudgetyoufilter.need,Returnsinmatchingplaincapabilitywords.ids,Eachpricesmatchandgives the product_id, capability_id and source_hub to passbacktomarket_invoke.market_invoke, its price, and `input`: the fields its input object takes.
Current air quality at a place: PM2.5 and PM10 (µg/m³), US and European AQI, from Copernicus CAMS via Open-Meteo, with a signed receipt. Pass latitude and longitude, or a city. Costs $0.001 per call. The first 5 priced calls per caller are free.
Verifiable random bytes for a draw, raffle or tie-break: an ECVRF output over your seed plus a proof anyone can check offline. The same seed always gives the same output, so publish the seed first to show the result was not picked. Costs $0.006 per call. The first 5 priced calls per caller are free.
The nearest live public sensors to a point, one per layer asked for (e.g. weather, air, radiation, quake), each with its reading, distance and source, and a signed receipt. Costs $0.03 per call. The first 5 priced calls per caller are free.
Current weather at a place: temperature (°C), humidity (%), pressure (hPa) and wind (m/s) from the nearest live Open-Meteo relay within 75 km, with a signed receipt. Pass latitude and longitude, or a city. Costs $0.001 per call. The first 5 priced calls per caller are free.