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Countervault public verification MCP service

Countervault public verification MCP service

by pleniv01

Countervault public verification MCP service

Read-only public receipt verification for Countervault. The installable Claude plugin is maintained separately at https://github.com/pleniv01/countervault-claude-plugin. The ChatGPT candidate is in the owner's codex-business-plugins collection.

Run npm ci, npm test, then npm start (port 3000 or PORT). The service provides stateless Streamable HTTP at /mcp, public documentation, privacy, health and a clearly labeled synthetic demo. No database, API keys or private account connection are required. OPENAI_DOMAIN_CHALLENGE is an optional portal-issued domain verification value, not an account credential.

node scripts/check-live.mjs checks both deployed tools using synthetic data. Tests cover fixed-host fetches, manifest integrity, matches/misses, access failures and actual MCP transport. The manifest formats were also compared with the application implementation for receipt versions 1, 2 and 3 on November 11.

Production: https://countervault-mcp-production.up.railway.app/mcp

The service does not change Countervault account records or its application deployment. It sends only fixed-host GET requests to the existing public receipt API. See privacy for data handling and infrastructure limits.

Tool Schema Changelog

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