Free x402 preflight gate plus paid on-chain truth checks for AI agents.
Connect Runs on your machine
claude mcp add verify402-mcp -e VERIFY402_URL=<VERIFY402_URL> -e EVM_PRIVATE_KEY=<EVM_PRIVATE_KEY> -e VERIFY402_NETWORKS=<VERIFY402_NETWORKS> -e MAX_PAYMENT_USD=<MAX_PAYMENT_USD> -e MAX_DAILY_USD=<MAX_DAILY_USD> -- npx -y [email protected]{
"mcpServers": {
"verify402-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"VERIFY402_URL": "<VERIFY402_URL>",
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>",
"VERIFY402_NETWORKS": "<VERIFY402_NETWORKS>",
"MAX_PAYMENT_USD": "<MAX_PAYMENT_USD>",
"MAX_DAILY_USD": "<MAX_DAILY_USD>"
}
}
}
}{
"mcpServers": {
"verify402-mcp": {
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"VERIFY402_URL": "<VERIFY402_URL>",
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>",
"VERIFY402_NETWORKS": "<VERIFY402_NETWORKS>",
"MAX_PAYMENT_USD": "<MAX_PAYMENT_USD>",
"MAX_DAILY_USD": "<MAX_DAILY_USD>"
}
}
}
}{
"servers": {
"verify402-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"[email protected]"
],
"env": {
"VERIFY402_URL": "<VERIFY402_URL>",
"EVM_PRIVATE_KEY": "<EVM_PRIVATE_KEY>",
"VERIFY402_NETWORKS": "<VERIFY402_NETWORKS>",
"MAX_PAYMENT_USD": "<MAX_PAYMENT_USD>",
"MAX_DAILY_USD": "<MAX_DAILY_USD>"
}
}
}
}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 |
|---|---|
VERIFY402_URLOptional | verify402 base URL |
EVM_PRIVATE_KEYOptional, secret | Private key for a dedicated hot wallet. Omit for the free preflight_gate only. [email protected] (this published release) defaults paid calls to Base Sepolia testnet (eip155:84532) for the public demo. Base mainnet (eip155:8453) is an explicit opt-in for a separate deployment and is not enabled b… |
VERIFY402_NETWORKSOptional | Comma-separated EVM payment networks for paid calls. Default Base Sepolia testnet (eip155:84532); set eip155:8453 explicitly for Base mainnet. The supported network-to-canonical-asset map is constrained to Base Sepolia and Base mainnet. |
MAX_PAYMENT_USDOptional | Hard cap on one x402 payment in USD (default 0.25). Enforced before signing. |
MAX_DAILY_USDOptional | Optional cap for total spend per UTC day across restarts. |
Details
| Package | [email protected] (NPM, stdio) |
| First published | 13 Nov 2026 |
| Last updated | 13 Nov 2026 |
| Registry name | io.github.a32116150-ctrl/verify402-mcp |
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