Read-only MCP server for verifying x402 USDC settlements on Base mainnet. Drop it into any MCP-compatible agent (Claude Desktop, Claude Code, Cursor, ChatGPT) to independently audit x402 payment…
Tensorfeed X402 Base Mcp is an MCP project maintained in the rippermercs/tensorfeed-x402-base-mcp repository. The maintainer describes its purpose as “Read-only MCP server for verifying x402 USDC settlements on Base mainnet. Drop it into any MCP-compatible agent (Claude Desktop, Claude Code, Cursor, ChatGPT) to independently…”. Read the project documentation for the complete scope.
The documented npm package is @tensorfeed/x402-base-mcp. The configuration below comes from the maintainer’s example; adapt its paths and account values to your environment.
Project documentation · Repository · Discovery listing. This profile records the public documentation checked on 2026-10-08.
Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.
| Tool | What it does |
|---|---|
| balance | Native ETH balance for an address |
| usdc_balance | USDC (Circle native bridged) balance for an address |
| block_number | Latest Base block number |
| get_tx_receipt | Full tx receipt with status, gas, and logs summary |
| call | Read-only contract call (eth_call, never broadcasts) |
| recent_transfers | USDC Transfer events involving an address over N blocks |
| verify_x402_settlement | Given a tx hash, expected recipient, and expected USDC amount, returns a structured verdict on whether the on-chain Transfer event matches. |
| parse_x402_manifest | Fetches https://{domain}/.well-known/x402.json, returns the structured manifest. |
| usdc_recent_payments_to | USDC transfers TO an address over N blocks; the merchant-side view. |
| probe_x402_endpoint | Probes any https URL and reports whether it returns a canonical x402-paid 402 response with accepts[]. |
| decode_x402_payment_payload | Offline decode of a base64 X-PAYMENT header (Coinbase x402 V2): returns scheme, network, version, EIP-3009 authorization, signature. |
| verify_afta_federation | Calls TensorFeed's AFTA certification endpoint for a domain, returns a scored checklist. |
| tf_payment_lookup | Checks whether a tx hash is a USDC payment to TensorFeed's canonical wallet on Base. |
| x402_publisher_health | Returns current outcome + 24h/7d uptime + recent series for a domain monitored by TensorFeed's hourly x402 status probe. |
| afta_federation_members | Returns the canonical curated list of confirmed AFTA federation members (TF origin + federated members). |
{
"mcpServers": {
"tensorfeed-x402-base": {
"command": "npx",
"args": [
"-y",
"@tensorfeed/x402-base-mcp"
]
}
}
}From the project documentation. Replace placeholders and example paths before connecting.
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