Pay x402 APIs in USDC on Base, Solana, and BNB Chain with spend mandates, receipts, idempotency.
Connect Runs on your machine
claude mcp add x402-payagent-mcp -e ARISPAY_API_KEY=<ARISPAY_API_KEY> -e PAYAGENT_PRIVATE_KEY=<PAYAGENT_PRIVATE_KEY> -- npx -y @arispay/[email protected]{
"mcpServers": {
"x402-payagent-mcp": {
"command": "npx",
"args": [
"-y",
"@arispay/[email protected]"
],
"env": {
"ARISPAY_API_KEY": "<ARISPAY_API_KEY>",
"PAYAGENT_PRIVATE_KEY": "<PAYAGENT_PRIVATE_KEY>"
}
}
}
}{
"mcpServers": {
"x402-payagent-mcp": {
"command": "npx",
"args": [
"-y",
"@arispay/[email protected]"
],
"env": {
"ARISPAY_API_KEY": "<ARISPAY_API_KEY>",
"PAYAGENT_PRIVATE_KEY": "<PAYAGENT_PRIVATE_KEY>"
}
}
}
}{
"servers": {
"x402-payagent-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@arispay/[email protected]"
],
"env": {
"ARISPAY_API_KEY": "<ARISPAY_API_KEY>",
"PAYAGENT_PRIVATE_KEY": "<PAYAGENT_PRIVATE_KEY>"
}
}
}
}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 |
|---|---|
ARISPAY_API_KEYOptional, secret | ArisPay developer API key (ap_live_… / ap_test_…). Optional — the setup tool can self-provision one from just an email, or set PAYAGENT_PRIVATE_KEY to sign locally with no account. |
PAYAGENT_PRIVATE_KEYOptional, secret | EVM private key for permissionless local signing (zero-signup mode): pay signs x402 payments with it directly — no ArisPay account needed. Generate one with `npx payagent wallet new`. Never sent to any server. |
Details
| Package | @arispay/[email protected] (NPM, stdio) |
| First published | 27 Aug 2026 |
| Last updated | 27 Aug 2026 |
| Registry name | io.github.stevemilton/x402-payagent-mcp |
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