Skip to content

Documentation / Specs & other rails

Specs & other rails

  • API reference, or download openapi.yaml for your client generator.
  • Billing connectors: Stripe, Chargebee and the signed webhook (events, payload, signing, retries).
  • llms.txt: a short, model-readable summary of PairRail for agents.
  • llms-full.txt and pricing.md: the same summary with every plan feature and FAQ answer, and the plans alone as Markdown.
  • Protocols: inspect live UCP, ACP, A2A and UAP payloads for Pro sellers. x402, AP2 and MPP are on the roadmap and not payable yet.
  • Interactive example: how a quote below and above the approval threshold resolves.
  • Questions or a missing endpoint? Email support@pairrail.com.