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MCP Anthropic Agent

mcp-anthropic-agent is the real-model MCP example. It exposes the agentxchain_turn tool contract over stdio and fulfills it with the Anthropic Messages API instead of echo logic.

What It Is​

  • Category: MCP example
  • Transport: stdio
  • Model backing: Anthropic Messages API
  • Source: examples/mcp-anthropic-agent

Workflow Or Proof Shape​

  • receives governed turn assignments through MCP
  • sends prompt and context to Claude
  • extracts turn-result JSON from the model response
  • injects identity fields back into the result before returning it

How AgentXchain Governs This Example​

AgentXchain still owns the governed lifecycle:

  • the MCP server only returns a turn result
  • AgentXchain validates the result, enforces role/phase rules, and stages acceptance artifacts
  • this proves MCP transport works with a real model, not just a canned payload

Run It​

cd examples/mcp-anthropic-agent
npm install
ANTHROPIC_API_KEY=your-key node server.js

Then bind it as an mcp runtime in agentxchain.json and dispatch a turn with agentxchain step.

Key Takeaways​

  • This is the bridge between MCP transport proof and real-model execution.
  • It is useful when you want MCP plus live model output on the same governed turn contract.
  • It does not weaken AgentXchain governance; it only changes the transport/runtime behind the turn.