Read-only pre-trade and market-data integrity checks for autonomous crypto agents, x402 paid, USDC on Base. Verified route: POST /v1/pre-trade-execution-gate at $0.02, which scores a caller-supplied visible order book for execution admissibility and returns PASS, CAUTION or AVOID with fill ratio, slippage, spread, visible depth and depth utilization. At verification it was given a deliberately thin synthetic book and returned AVOID with fill ratio, slippage, spread, average and worst fill price and visible depth all matching values computed independently beforehand. The sibling route POST /v1/market-data-attestation at $0.01 is listed but not payment verified. The verdict is scoped to visible order book admissibility only and excludes fees, funding, latency, queue position, hidden liquidity and market movement; it never places orders and is not trade advice. Base only.
Tomasz Czuba has 1 live API on PayAPI Market with 2 endpoints in total, in Verification: Tradebot Risk & Integrity API.
Are Tomasz Czuba's APIs verified?
1 of 1 have at least one settlement-verified route: PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC payment on-chain. Each listing page shows which routes were paid and links the receipt.
How do I pay for Tomasz Czuba's APIs?
Per request, in USDC, over the x402 protocol. An agent calls the endpoint, receives HTTP 402 with the price and wallet, pays and retries. There is no API key, account or subscription, and Tomasz Czuba keeps 100% of each payment.