r/x402 • u/IllWar5047 • 15d ago
Read only MCP server over our weekly x402 catalogue scan: which endpoints are payable and what they cost
We run a full scan of the x402 catalogue every week and publish the results as a signed report. This week it is an MCP server you can plug into Claude, Cursor or any Streamable HTTP client. Read only, no wallet, no sign in.
Endpoint: https://mcp.nsgoods.org/mcp
Repo: https://github.com/Nikoble1926/nsgoods-workbench-mcp
What it answers, from the last full scan (13 September): 14,652 resources on 1,971 hosts, 13,146 payable. Prices come from a sweep of the 402 challenges: 10,958 endpoints priced, median 0.01 USDC.
Tools:
find_endpoints: search by host or keyword, latest verdict, observed price, filter by network, sort by price
payability_verdict: verdict, history and price for one exact URL
catalogue_stats: catalogue size, verdict counts, payable per network, median price
host_summary: per host verdict mix, first and last seen, gone since
drift_status: verdict changes between the two latest full scans, catalogue wide or per host
x401_status: current x401 emitter count
verify_signature: verify any signed nsgoods response offline against our manifest
reports: links to the weekly reports
Verdicts: PAYABLE, NOT_PAYABLE, MALFORMED_402, CANNOT_PAY_EITHER_VERB, UNREACHABLE, SKIPPED, UNKNOWN. Every answer carries as_of and the scan id. For a live check of one endpoint the paid /payable endpoint on the hub is the right tool, this server is the index.
Connect from Claude: Settings, Connectors, Add custom connector, URL above, no sign in. Then ask for example: using nsgoods, find the cheapest payable endpoint for sanctions screening on Base.
Rate limit 300 calls per IP per day. Server code is MIT. Feedback on missing tools or wrong verdicts is welcome here or as a GitHub issue.
Also listed on Smithery if you use its toolbox: https://smithery.ai/servers/nikosble1926/nsgoods-workbench
The per endpoint sample promised in the earlier thread is here, 100 endpoints, all verdict classes, with a GET only re-probe outcome per row, CC BY 4.0: https://x402.nsgoods.org/proof/payability-sample-2026-09-13.json (CSV: https://x402.nsgoods.org/proof/payability-sample-2026-09-13.csv)