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gfoster12

fosterrx-verify-mcp-server

by gfoster12
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fosterrx-verify-mcp-server

A read-only MCP server that verifies Foster Rx certificates using public material only: the world-readable certificate envelope and the Ed25519 trust anchor published at https://fosterrx.com/.well-known/angis-signing-key-v1.pub.

No credential exists anywhere in this codebase. That is not a deployment choice but the product's argument in server form: verification that required Foster Rx's permission would not be verification. This repository being public and auditable is part of the same argument.

Tools

Tool

What it does

fosterrx_verify_certificate

Real Ed25519 verification of the signed canonical bytes against the live trust anchor. Verdicts: verified / signature_invalid / not_found / tool_fault.

fosterrx_get_certificate_record

The full signed canonical, decoded verbatim. No verification performed; nothing renamed or improved on.

fosterrx_get_trust_anchor

The published public key, plus instructions for verifying with no Foster Rx software at all.

Related MCP server: proofrelay

Verdict discipline

  • not_found is not invalid. An unpublished certificate is a fact about the public register, never a claim about any artifact.

  • tool_fault is not invalid. A network failure or malformed input is a fact about this tool's run and says nothing about the certificate.

  • signature_invalid is asserted only after Ed25519 arithmetic failed over the signed bytes under the published key.

  • Both issued identifier shapes are accepted (FRXS-<16 hex> and FRXS-<uuid>); a pattern inferred from only one of them has previously rejected every real certificate.

Run

npm ci && npm run build
PORT=8080 node dist/index.js     # MCP endpoint at POST /mcp, health at /healthz

Deploy (Cloud Run)

gcloud run deploy fosterrx-verify-mcp --source . \
  --region us-east4 --project fosterrx-prod --allow-unauthenticated

Public, unauthenticated, by design: it can only read what the world can already read.

Verify with your own AI

This server is public. Anyone can register it and verify any published Foster Rx certificate — no account, no permission:

  1. In Claude (or any MCP client): add a custom connector with URL https://fosterrx-verify-mcp-630726936307.us-east4.run.app/mcp

  2. Ask: verify FRXS-5330F9E368BA4536

  3. The reader gets the cryptographic verdict — not the issuer's word.

This server cannot be installed

F
license - not found
Not graded
quality - not tested
C
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

Resources

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