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On-chain provenance lookup for AnchorRegistry. Resolve AR-IDs, hashes, and full trees. Authless.
About
On-chain provenance lookup for AnchorRegistry. Resolve AR-IDs, hashes, and full trees. Authless.
Remote endpoints: streamable-http: https://mcp.anchorregistry.ai/mcp sse: https://mcp.anchorregistry.ai/sse
Security Report
9.9
Low Risk9.9Low RiskValid MCP server (1 strong, 1 medium validity signals). No known CVEs in dependencies. Imported from the Official MCP Registry. 1 finding(s) downgraded by scanner intelligence.
Endpoint verified · Open access · 1 issue found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Connect
Remote Plugin
No local installation needed. Your AI client connects to the remote endpoint directly.
Add this to your MCP configuration to connect:
{
"mcpServers": {
"io-github-anchorregistry-ar-mcp": {
"url": "https://mcp.anchorregistry.ai/mcp"
}
}
}Documentation
View on GitHubFrom the project's GitHub README.
ar-mcp
The AnchorRegistry MCP server. Resolve any AR-ID, manifest hash, or provenance tree from any MCP-compatible AI client.
Endpoint: https://mcp.anchorregistry.ai/mcp
Install
Claude Desktop
Settings → Integrations → Add server.
URL: https://mcp.anchorregistry.ai/mcp
Claude Code
claude mcp add --transport http anchorregistry https://mcp.anchorregistry.ai/mcp
Cursor
Settings → MCP → Add new MCP server.
Name: anchorregistry · Type: http · URL: https://mcp.anchorregistry.ai/mcp
Tools
ar_verify_arid
Resolves an AR-ID to its full provenance record.
"What's at AR-2026-qnPOJ1z?"
ar_verify_by_hash
Resolves an artifact by SHA-256 manifest hash.
ar_resolve_tree
Returns the full provenance tree for any AR-ID.
How it works
ar-mcp is a thin proxy. Every tool call hits api.anchorregistry.ai
and returns the JSON unchanged. No data is logged, no credentials are
stored, no state is held between requests.
The full surface is documented at:
- https://anchorregistry.ai/llms.txt
- https://anchorregistry.ai/agents.json
- https://api.anchorregistry.ai/openapi.json
Roadmap
v0.2 will add ar_check_balance and ar_register_artifact once the MCP
credential-handling pattern stabilizes across clients. ar_seal_tree is
deferred indefinitely (irreversible action; needs robust user-confirmation
primitives the protocol does not yet provide). The deferred tools are
fully implemented and live in src/future-tools.ts —
enabling them is a one-line flip per tool.
Develop
npm install
npm test # vitest, hits live api.anchorregistry.ai
npm run type-check
npm run dev # wrangler dev — http://localhost:8787
npm run deploy # wrangler deploy
Verify locally with the MCP inspector:
npx @modelcontextprotocol/inspector http://localhost:8787/mcp
License
MIT.
See also
- AnchorRegistry: https://anchorregistry.com
- Python SDK: https://pypi.org/project/anchorregistry/
- Source: https://github.com/AnchorRegistry/ar-mcp
- Spec: https://anchorregistry.ai/agents.json
- Contracts: https://github.com/AnchorRegistry/ar-contracts-v1
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