Eight paid DeFi tools: prices, gas, swaps, token security, holders, yields, funding and wallets
To add x402-api 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 5 environment variables, listed below.
Install
npx -y @x402-api/mcp-server@1.0.5Environment variables
X402_API_BASE_URLSet in your MCP configX402_WALLET_PRIVATE_KEYSet in your MCP configX402_MAX_PER_CALL_USDCSet in your MCP configX402_REFERRAL_SOURCESet in your MCP configX402_EXPECTED_PAY_TOSet in your MCP configInstall with your client
claude mcp add x402-api --env X402_API_BASE_URL=<YOUR_X402_API_BASE_URL> --env X402_WALLET_PRIVATE_KEY=<YOUR_X402_WALLET_PRIVATE_KEY> --env X402_MAX_PER_CALL_USDC=<YOUR_X402_MAX_PER_CALL_USDC> --env X402_REFERRAL_SOURCE=<YOUR_X402_REFERRAL_SOURCE> --env X402_EXPECTED_PAY_TO=<YOUR_X402_EXPECTED_PAY_TO> -- npx -y @x402-api/mcp-server@1.0.5
Run this in a terminal to add the server to Claude Code.
What this does
x402-api 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_API_BASE_URL X402_WALLET_PRIVATE_KEY X402_MAX_PER_CALL_USDC X402_REFERRAL_SOURCE X402_EXPECTED_PAY_TO
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install x402-api?
Run the Claude Code command in the install section to add x402-api 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 x402-api?
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 x402-api as well.
Does x402-api need an API key?
Yes. Before it can run, set these environment variables: X402_API_BASE_URL, X402_WALLET_PRIVATE_KEY, X402_MAX_PER_CALL_USDC, X402_REFERRAL_SOURCE, X402_EXPECTED_PAY_TO. 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?
Claim this listing to see its traffic, fix details yourself, and skip the review queue on future updates.
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