P2Flux API — API Evangelist enrichment overlay

overlay: 1.0.0
info:
  title: P2Flux API — API Evangelist enrichment overlay
  version: 1.0.0
extends: https://p2flux.com/openapi.json
x-provenance:
  generated: '2026-09-15'
  method: generated
  source: >-
    API Evangelist enrichment. Captures cross-cutting semantics discovered from the docs
    (auth model, idempotency, reversibility, rate limits) without mutating the original
    contract.
actions:
  - target: $.info
    description: Annotate the runtime semantics an agent needs before calling P2Flux.
    update:
      x-authentication: >-
        No API key or Authorization header. Authorization is an in-body HMAC-signed
        capability (p2f1./p2setup2./p2s2./p2cancel1./p2refund1.) plus the payer's EIP-712
        wallet signature. Treat every capability as a bearer secret; keep it server-side.
      x-idempotency: >-
        No Idempotency-Key header. Writes are exactly-once by construction: a payment
        settles once via the contract replay guard, a charge is allowed once per billing
        period. Identical retries are safe.
      x-reversibility: >-
        One-time payments are reversible via refund (prepareRefund/verifyRefund);
        subscriptions via cancellation/allowance revocation. No bounded refund window is
        published.
      x-rate-limits: >-
        Per-IP limits (600/min global; 120/min on /v1/payments and /v1/subscriptions),
        per-object charge limits, and per-wallet sponsored-tx limits. 429 with RATE_LIMITED
        or CONCURRENCY_LIMIT, retry_after body field and Retry-After header.
  - target: $.info
    description: Record the on-chain settlement environment as agent context.
    update:
      x-settlement:
        asset: USDC (ERC-20, 6 decimals)
        production: { chain: Base Mainnet, chain_id: 8453, base_url: https://api.p2flux.com }
        test: { chain: Base Sepolia, chain_id: 84532, base_url: https://api-test.p2flux.com }
        custody: non-custodial (funds never held by P2Flux)