Policy-gated x402 MCP for agent workflows with TEE receipts, 18 tools, and no custody.
To add yieldagentx402 to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 3 environment variables, listed below.
Install
npx -y agentx402-mcp-server@1.0.4Environment variables
YAX_API_KEYSet in your MCP configYAX_AGENT_IDSet in your MCP configYAX_MCP_ENDPOINTSet in your MCP configInstall with your client
claude mcp add yieldagentx402 --env YAX_API_KEY=<YOUR_YAX_API_KEY> --env YAX_AGENT_ID=<YOUR_YAX_AGENT_ID> --env YAX_MCP_ENDPOINT=<YOUR_YAX_MCP_ENDPOINT> -- npx -y agentx402-mcp-server@1.0.4
Run this in a terminal to add the server to Claude Code.
What this does
yieldagentx402 exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
YAX_API_KEY YAX_AGENT_ID YAX_MCP_ENDPOINT
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install yieldagentx402?
Run the Claude Code command in the install section to add yieldagentx402 to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with yieldagentx402?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to yieldagentx402 as well.
Does yieldagentx402 need an API key?
Yes. Before it can run, set these environment variables: YAX_API_KEY, YAX_AGENT_ID, YAX_MCP_ENDPOINT. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
Is this your MCP server?
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