Pay-per-call x402 crypto research and Base address/approval risk checks. Testnet by default.
Connect Runs on your machine
claude mcp add x402-research-mcp -e X402_NETWORK=<X402_NETWORK> -e X402_BUYER_PRIVATE_KEY=<X402_BUYER_PRIVATE_KEY> -- npx -y @agentfirm402/[email protected]{
"mcpServers": {
"x402-research-mcp": {
"command": "npx",
"args": [
"-y",
"@agentfirm402/[email protected]"
],
"env": {
"X402_NETWORK": "<X402_NETWORK>",
"X402_BUYER_PRIVATE_KEY": "<X402_BUYER_PRIVATE_KEY>"
}
}
}
}{
"mcpServers": {
"x402-research-mcp": {
"command": "npx",
"args": [
"-y",
"@agentfirm402/[email protected]"
],
"env": {
"X402_NETWORK": "<X402_NETWORK>",
"X402_BUYER_PRIVATE_KEY": "<X402_BUYER_PRIVATE_KEY>"
}
}
}
}{
"servers": {
"x402-research-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@agentfirm402/[email protected]"
],
"env": {
"X402_NETWORK": "<X402_NETWORK>",
"X402_BUYER_PRIVATE_KEY": "<X402_BUYER_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 |
|---|---|
X402_NETWORKOptional | Network: eip155:84532 (Base Sepolia, default) or eip155:8453 (Base mainnet) |
X402_BUYER_PRIVATE_KEYOptional, secret | Buyer wallet key that pays per call (capped 0.10 USDC/call, 0.50/session on mainnet) |
Details
| Package | @agentfirm402/[email protected] (NPM, stdio) |
| First published | 26 Oct 2026 |
| Last updated | 26 Oct 2026 |
| Registry name | io.github.KevinM222/x402-research-mcp |
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