# Foundry x402 data endpoints

> Pay-per-call data products over x402 (HTTP 402 + USDC on base). No account and no API key: call the URL, read the 402 challenge, pay, retry the same request with an X-PAYMENT header.

## Products

- [Contract Code Identity](https://api.darangilau.com/contract-code-hash): $0.01 per call. Check a deployed contract's code identity - keccak256 code hash read from the node via eth_getProof, confirmed on a second independent node, plus EIP-1167/1967/1822 proxy resolution.
- [Surplus Sold Comps](https://api.darangilau.com/surplus-sold-comps): $0.02 per call. Sold-price comps for US government surplus - closed GSA auction lots matching an item query, with hammer prices, bidder counts, dates and locations, from a daily-archived lot history.
- [Wallet Revenue Authenticity](https://api.darangilau.com/wallet-revenue-authenticity): $0.05 per call. Score whether an x402 seller wallet's revenue is real - distinct payers, repeat share, calls per payer, self-pay and round-trip flags, from Base USDC settlement history on chain.

## Machine-readable

- [Service manifest](https://api.darangilau.com/.well-known/x402): products, prices, input schemas, example requests and responses.
- [OpenAPI](https://api.darangilau.com/openapi.json): the same surface as OpenAPI 3.1.
- [Health](https://api.darangilau.com/health): liveness.