Provider trust center
Prove that agent API calls were paid, signed and ready to fulfill.
Kestrel Provider closes the loop between Marketplace and Proof: API providers get a live receipt registry, signing-key surface, fulfillment evidence and direct links to every policy chain and Arc settlement evidence when configured.
Provider onboarding
From API listing to proof-backed paid access.
01Create API listingProvider defines endpoint, SLA, category and verification requirements.
02Set priceUSDC price, quota and prepaid balance rules become part of the offer.
03Publish x402 offerMarketplace exposes a signed machine-readable offer for agents.
04Agent buys accessTreasury, Shield, Reputation and Interop gates run before fulfillment.
05Receipt appears in ProofProvider signature, settlement evidence and validation artifacts become reviewable.
Signing keys
Provider keys visible before fulfillment.
provider_key_f1030930ed25519-provider-sim · rotation slot 01 · 1 receiptsactive
Fulfillment policy
Serve only after receipt verification.
Offer signedMarketplace price, API terms and capability are hashed before the agent authorizes spend.
Budget lockedTreasury confirms budget, reputation threshold and policy limits before provider fulfillment.
Receipt signedProvider signs the receipt payload with a visible key id and settlement evidence.
Proof linkedThe proof URL links policy chain, receipt, settlement hash and reputation update.
Receipt registry
Recent paid jobs providers can reconcile.
APIProviderReceiptSettlementProof
Realtime Price Feedflow_demo_001
ChainData Labsprovider_key_f1030930
0xf7adbc...c7fa20.003 USDC0x84de21...3a921
View Arc Marketplace
Providers can publish APIs and prove each paid request without a separate account system.
Arc Billing
Usage, receipts and invoices can share the same receipt digest and settlement id.
Arc Proof
External reviewers can verify the receipt, policy chain and settlement evidence from one URL.