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 "compare_tools", "deep_check", "preflight_batch" and 3 more
{"destructiveHint":false,"idempotentHint":false,"openWorldHint":true,"readOnlyHint":truefalse,"title":"Compare x402 seller tools"}
{"destructiveHint":false,"idempotentHint":false,"openWorldHint":true,"readOnlyHint":truefalse,"title":"Deep x402 endpoint trust check"}
{"destructiveHint":false,"idempotentHint":false,"openWorldHint":true,"readOnlyHint":truefalse,"title":"Batch x402 trust preflight"}
Preflightbefore paying anyan x402tool. MandatorysellercheckURL before settle / PAYMENT-SIGNATURE. Pass the absolute https ⟨67 unchanged words⟩
{"destructiveHint":false,"idempotentHint":false,"openWorldHint":true,"readOnlyHint":truefalse,"title":"x402 endpoint trust preflight"}
{"destructiveHint":false,"idempotentHint":false,"openWorldHint":true,"readOnlyHint":truefalse,"title":"Verify x402 payTo address"}
{"destructiveHint":false,"idempotentHint":false,"openWorldHint":true,"readOnlyHint":false,"title":" ⟨6 unchanged words⟩
Changed the definition of "preflight_check"
Mandatory checkPreflight before paying any x402endpoint.tool. Mandatory check before settle / PAYMENT-SIGNATURE. Pass the absolute https seller URL. Returns verdict ⟨7 unchanged words⟩ payToChanges, priceChanges). Use when: about tosettlepay/anyPAYMENT-SIGNATURE;x402 endpoint; asking is this API a scam; is this ⟨37 unchanged words⟩
Certificate recorded, valid to 2027-01-29
Authorization not required
Added "deep_check" and "watch_tool"; changed the definition of "compare_tools", "preflight_batch", "preflight_check" and 1 more (4 tools before, 6 now)
⟨25 unchanged words⟩ pick reliable/cheap candidates and skip avoid. Charged perURL.URL via MCP x402 payment.
⟨13 unchanged words⟩ (N × unit) in a single Exactsettlement.settlement via MCP _meta payment. Prefer when comparing candidates, picking the cheapest/most ⟨11 unchanged words⟩
Unknown → Live
First tool surface recorded: 4 tools (server version 0.2.2)
npm:x402check-mcp (package_npm) — from mcp_registry, with the record
https://x402check.dev/mcp (mcp_streamable_http) — from mcp_registry, with the record
Showing the latest 9 events. The API returns up to 500 and filters by kind: ?kind=tool_surface_changed
Mandatorytrust preflightcheck before paying any x402 endpoint. Pass the absolute ⟨16 unchanged words⟩ when: about to settle / PAYMENT-SIGNATURE; askingifisanthisendpointAPI a scam; is this endpoint safe or legit; debugging a failing 402; checking ⟨7 unchanged words⟩ on Base. Do not pay if verdict=avoid. Charged$0.002$0.01 per URL via x402 Exact onGETthis/preflight.MCP tools/call (params._meta['x402/payment']).
⟨41 unchanged words⟩ or detecting a rug-style wallet swap. Charged perURL.URL via MCP x402 payment.
Deeper trust check before paying an x402 endpoint ($0.05 Exact USDC). Runs the same live 402 + history as preflight_check, then repeated probes for payTo/price consistency, a recent public Base USDC-to-payTo transfer sample, Bazaar + 402 Index listing checks, and drift vs last KV history. Does not claim OFAC or wallet simulation. Optional when the base check is not enough signal.
Subscribe to daily re-checks of one x402 seller URL for 30 days. Alerts your webhook and/or email when payTo, price, network, or availability changes. Fixed $5 USDC Exact (not per-check). Optional after a one-shot preflight when you will revisit the same seller.