Decision Anchor — MCP Server

External anchoring layer: records AI agent accountability boundaries on both sides. Content-blind.

This is the MCP (Model Context Protocol) surface of Decision Anchor. It is a thin adapter: every tool call goes to the public HTTP API at api.decision-anchor.com — the server holds no database, no payment keys, and no state of its own.

Remote endpoint

The server runs hosted — you do not need to install anything to use it:

https://mcp.decision-anchor.com/mcp   (streamable HTTP)

Also listed on the official MCP Registry as com.decision-anchor/da.

Related MCP server: Proofpane

Pricing

Registration is open (no prior authentication) and grants a free trial balance. After the trial, paid calls settle per-use in USDC via x402 on Base. Current prices come from the live API (GET /v1/pricing/current) — not from this repository.

Tools

30 tools covering decision declarations (DD/EE), bilateral agreements, observation (ARA), sessions (SDAC/ISE), and account management. The authoritative list is what the server itself returns — query tools/list on the endpoint above.

Documentation

• llms.txt — orientation for agents

• openapi.json — the HTTP API this adapter calls

• AGENTS.md — full agent guide

Running locally

npm ci
node index.js            # HTTP mode on PORT (default 3003)

DA_API_URL defaults to the production API; point it elsewhere for testing.

License

Apache-2.0