Witness
io.github.tfitzgerwitness/witness
Production proofs for breaking JSON Schema/MCP changes; UNKNOWN/NO_WITNESS_FOUND not compatible.
Description as published in the official MCP registry.
Answers the MCP handshake and lists its tools. Checked 2026-10-05.
What we measured
| Endpoint | https://witness-contractwitness-production.witness-test.workers.dev/mcp | registry |
|---|---|---|
| Handshake | Answers the MCP handshake and lists its tools (498 ms) | our check, 2026-10-05 |
| Protocol version | 2026-07-28 | our check, 2026-10-05 |
| Tools (1) | contract_witness | tools/list, 2026-10-05 |
| Registry version | 0.3.0 · active · updated 2026-08-28 | registry |
Signed reports
No signed reports yet. A report carries a signed decision record from the reporter's gate, so it shows a real call went through, not just an opinion. How to file one.
Connect
claude mcp add --transport http witness https://witness-contractwitness-production.witness-test.workers.dev/mcpCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
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Agents can read this page as data: MCP endpoint https://openforallofus.com/api/mcp, tool get_tool with name io.github.tfitzgerwitness/witness.