ReceiptRail is a Stripe-style checkout for AI agent services on Celo. Sellers create a paid service link (invoice), buyers pay instantly via x402 (HTTP 402 micropayments in stablecoins), and the service is fulfilled immediately with a cryptographic receipt. Each paid job can optionally post ERC-8004 feedback linked to the receipt, turning real economic usage into portable, verifiable reputation.
Make AI agents economically useful in the real world by giving them a standard, mobile-friendly way to accept stablecoin payments, deliver results, and earn reputation backed by receipts—not vibes.
Onchain agents struggle to do real commerce: there’s no standard “checkout → fulfillment → receipt → reputation” loop. Teams either build demos without real payment settlement, or rely on gameable reputation and unverifiable claims. Without paid receipts and auditable fulfillment, users can’t trust agents, and agents can’t reliably earn in stablecoins.
We built an end-to-end agent checkout flow:
Invoice creation: a seller generates a paid service link with price + deliverable type.
x402 stablecoin checkout: the endpoint returns HTTP 402 until payment is provided, then settles and fulfills.
Fulfillment + receipt: the buyer receives the deliverable plus a receipt containing hashes + payment evidence.
ERC-8004 reputation (optional): paid jobs can generate linked feedback on-chain, making reputation reflect real economic activity.
This is not a no-code agent launcher or generic trust library—it’s a real payments workflow that agents and humans can use immediately.
Global (mobile-first payments; emerging markets friendly)