Eight paid DeFi tools: prices, gas, swaps, token security, holders, yields, funding and wallets
Connect Runs on your machine
claude mcp add x402-api -e X402_API_BASE_URL=<X402_API_BASE_URL> -e X402_WALLET_PRIVATE_KEY=<X402_WALLET_PRIVATE_KEY> -e X402_MAX_PER_CALL_USDC=<X402_MAX_PER_CALL_USDC> -e X402_REFERRAL_SOURCE=<X402_REFERRAL_SOURCE> -e X402_EXPECTED_PAY_TO=<X402_EXPECTED_PAY_TO> -- npx -y @x402-api/[email protected]{
"mcpServers": {
"x402-api": {
"command": "npx",
"args": [
"-y",
"@x402-api/[email protected]"
],
"env": {
"X402_API_BASE_URL": "<X402_API_BASE_URL>",
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>",
"X402_MAX_PER_CALL_USDC": "<X402_MAX_PER_CALL_USDC>",
"X402_REFERRAL_SOURCE": "<X402_REFERRAL_SOURCE>",
"X402_EXPECTED_PAY_TO": "<X402_EXPECTED_PAY_TO>"
}
}
}
}{
"mcpServers": {
"x402-api": {
"command": "npx",
"args": [
"-y",
"@x402-api/[email protected]"
],
"env": {
"X402_API_BASE_URL": "<X402_API_BASE_URL>",
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>",
"X402_MAX_PER_CALL_USDC": "<X402_MAX_PER_CALL_USDC>",
"X402_REFERRAL_SOURCE": "<X402_REFERRAL_SOURCE>",
"X402_EXPECTED_PAY_TO": "<X402_EXPECTED_PAY_TO>"
}
}
}
}{
"servers": {
"x402-api": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@x402-api/[email protected]"
],
"env": {
"X402_API_BASE_URL": "<X402_API_BASE_URL>",
"X402_WALLET_PRIVATE_KEY": "<X402_WALLET_PRIVATE_KEY>",
"X402_MAX_PER_CALL_USDC": "<X402_MAX_PER_CALL_USDC>",
"X402_REFERRAL_SOURCE": "<X402_REFERRAL_SOURCE>",
"X402_EXPECTED_PAY_TO": "<X402_EXPECTED_PAY_TO>"
}
}
}
}Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.
Tools
This server runs locally, so its tools are listed by your MCP client once it starts.
Environment variables
| Name | Description |
|---|---|
X402_API_BASE_URLOptional | x402 API base URL (default: https://x402-api.fly.dev) |
X402_WALLET_PRIVATE_KEYOptional, secret | Base wallet private key for optional EIP-3009 auto-pay. Default mode inspects payment requirements without paying. |
X402_MAX_PER_CALL_USDCOptional | Maximum USDC allowed per automatic tool call (default: 0.01) |
X402_REFERRAL_SOURCEOptional | Optional referral label: github, glama, nohumans, bazaar, mcp, eliza, demo or test. Default mcp. |
X402_EXPECTED_PAY_TOOptional | Expected payment recipient; defaults to the official x402-api wallet. Change only when using a trusted alternative deployment. |
Details
| Package | @x402-api/[email protected] (NPM, stdio) |
| First published | 30 Sep 2026 |
| Last updated | 30 Sep 2026 |
| Registry name | io.github.fernsugi/x402-api |
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