Pay per call in USDC with x402

An AI agent or a script can create a tracked load and read the driver's live position without an account or an API key. Each call is paid from a wallet in USDC over x402: HTTP 402 plus a signed USDC transfer.

Prices

Call	Price
`POST /api/internal/loads` — create a load	$0.65
`GET /api/internal/loads/{loadNumber}` — position	$0.02
`GET /api/internal/loads/{loadNumber}/trip-stats`	$0.02
`POST /api/internal/loads/{loadNumber}/cancel`	Free

Networks

network	Chain	What you sign
`arc-mainnet`	Arc (5042)	EIP-3009 TransferWithAuthorization
`base-mainnet`	Base (8453), Circle USDC	EIP-3009 TransferWithAuthorization
`solana-mainnet`	Solana, Circle USDC	Partially signed SPL TransferChecked
`arc-testnet`	Arc testnet (5042002)	Faucet USDC, for trying it out

PingPoint verifies and settles the payment itself, with no external facilitator. Its relayer submits the transfer and pays the gas; you only sign.

How a paid call works

Send the request with no credentials. The answer is 402 with one offer per network in accepts[].
Sign the offer for your network for exactly that amount.
Repeat the request with the X-PAYMENT header. The response carries X-PAYMENT-RESPONSE with the transaction hash or Solana signature.

The load belongs to the paying wallet: only that wallet can read or cancel it. Per-wallet daily limits apply.

From an MCP client

The MCP server @suverselabs/pingpoint-mcp can pay per call itself: give it PINGPOINT_WALLET_KEY_FILE instead of an API key.

Full request and response formats, error codes and the OpenAPI spec are in the docs.