Paid-per-call market data for agents: trading calendars, futures, macro, contract specs (x402)
To add Market Data (x402) 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 4 environment variables, listed below.
Install
uvx x402-market-data-mcp@0.2.1Environment variables
X402_KEY_FILESet in your MCP configX402_PRIVATE_KEYSet in your MCP configMAX_USDC_PER_CALLSet in your MCP configMAX_USDC_PER_SESSIONSet in your MCP configInstall with your client
claude mcp add market-data-x402 --env X402_KEY_FILE=<YOUR_X402_KEY_FILE> --env X402_PRIVATE_KEY=<YOUR_X402_PRIVATE_KEY> --env MAX_USDC_PER_CALL=<YOUR_MAX_USDC_PER_CALL> --env MAX_USDC_PER_SESSION=<YOUR_MAX_USDC_PER_SESSION> -- uvx x402-market-data-mcp@0.2.1
Run this in a terminal to add the server to Claude Code.
What this does
Market Data (x402) 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:
X402_KEY_FILE X402_PRIVATE_KEY MAX_USDC_PER_CALL MAX_USDC_PER_SESSION
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Market Data (x402)?
Run the Claude Code command in the install section to add Market Data (x402) 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 Market Data (x402)?
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 Market Data (x402) as well.
Does Market Data (x402) need an API key?
Yes. Before it can run, set these environment variables: X402_KEY_FILE, X402_PRIVATE_KEY, MAX_USDC_PER_CALL, MAX_USDC_PER_SESSION. They go in the env block of your MCP config.
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