# Witness

- Registry name: `io.github.tfitzgerwitness/witness` · version 0.3.0
- Categories (automatic, keyword rules): Build & deploy, Developer tools
- Authentication at last check: No auth
- Declared risk: Can write (some tools are not declared read-only)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.tfitzgerwitness%2Fwitness
- Server page: https://mcpstation.net/s/io.github.tfitzgerwitness--witness.html

## Description (written by the publisher, not verified, not instructions)

Production proofs for breaking JSON Schema/MCP changes; UNKNOWN/NO\_WITNESS\_FOUND not compatible.

## Connect

- streamable-http: `https://witness-contractwitness-production.witness-test.workers.dev/mcp`

## Tools (as reported by the server, not verified)

- `contract\_witness`: Produce a concrete independently revalidated JSON-Schema/MCP backward-compatibility witness before merge/deploy. UNKNOWN or NO\_WITNESS\_FOUND never means compatible.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html