io.github.DrVelvetFog/x402-conformance-mcp
x402 Conformance Tools
Is the x402 Conformance Tools MCP server down? No. It answered initialize and tools/list in the probe of 2026-11-15.
Non-custodial x402 checks: decode 402s, verify settlements on-chain, lint specs, test facilitators.
alive probed 2026-11-15
- Run it
- npx -y @uigstudios/x402-conformance-mcp@0.1.1 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- x402-conformance 0.1.1
- Capabilities
- tools
- Instructions
- none
- Of a 1M window
- 0.2 % of a 1M context window
- Count
- 2.2k tokens in Claude Opus 5.5, exact, measured 2026-11-15. With the Claude Code prefix mcp__…__ on each tool name: 2.3k. The o200k_base estimate is 1.3k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/DrVelvetFog/x402-pilot
- Registry
- active, updated 2026-11-14 · registry entry
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.74×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| inspect_payment_response | 580 | 334 | 26 % |
| run_conformance | 502 | 289 | 22 % |
| decode_402 | 335 | 193 | 15 % |
| check_compliance | 307 | 177 | 14 % |
| validate_extension | 280 | 161 | 12 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.DrBaher/contract-ops-mcp · alive
- io.github.DrBaher/sign-cli · crashed on start
- io.github.DrBaher/supstack · alive
- L2 Calendar io.github.Dreiev/l2calendar-mcp · alive
- io.github.Drix10/ai-resources · alive
- BitBooth Agent Tools io.github.Drock91/bitbooth-fetch · crashed on start
- BitBooth Seller Routes io.github.Drock91/bitbooth-routes · crashed on start
- Kaspa Script Tools io.github.DrVelvetFog/kaspa-script-mcp · alive
Servers that mention conformance.
- Mekler AI ai.mekler/agent-discovery · alive
- Caption File Check com.powmcp/caption-file-check · alive
- The Service Marketing Guys Audit com.theservicemarketingguys/audit · alive
- PDF Spec (PDF Agent Stack) io.github.shuji-bonji/pdf-spec-mcp · alive
- IAMF Sentinel io.github.jlivingston-Cipher/iamf-sentinel-mcp · alive
- MCP Protocol Conformance io.studiomeyer/protocol-conformance · crashed on start
- io.github.arden-instance/x402lint · needs args
- PDF Verify (PDF Agent Stack) io.github.shuji-bonji/pdf-verify-mcp · alive
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.