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.

Creates a signed x402 receipt and opens its proof.
Open proof archive Run workflow
Providers paid2Across recent agentic workflows
Signed receipts12x402-style provider receipts
Settlement proofs12With Arcscan tx when configured
Recorded value0.036 USDCIn recent proof history
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 · 11 receiptsactive
provider_key_f4030de9ed25519-provider-sim · rotation slot 02 · 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_agentic_903ea7a97d39
ChainData Labsprovider_key_f1030930
0xc68177...edc5e
0.003 USDC0x6c8a93...49e7a
View
Realtime Price Feedflow_agentic_ec495a455c86
ChainData Labsprovider_key_f1030930
0x180292...a14ec
0.003 USDC0x74284b...e00b0
View
Realtime Price Feedflow_agentic_29930086080b
ChainData Labsprovider_key_f1030930
0xde1d14...28ffb
0.003 USDC0x23ca6d...a0bd5
View
Realtime Price Feedflow_agentic_a5a0c27b12e1
ChainData Labsprovider_key_f1030930
0xbb559f...7785a
0.003 USDC0x2d718f...6c67b
View
Realtime Price Feedflow_agentic_31227af7d7fe
ChainData Labsprovider_key_f1030930
0x5666c0...696c3
0.003 USDC0xbf2656...a6eba
View
Realtime Price Feedflow_agentic_992afea92995
ChainData Labsprovider_key_f1030930
0xc9c74c...c1aa6
0.003 USDC0x38a88c...4f879
View
Realtime Price Feedflow_agentic_f5168c491778
ChainData Labsprovider_key_f1030930
0x4ef76a...3a7eb
0.003 USDC0x139729...66d32
View
Realtime Price Feedflow_agentic_e1508e0e0303
ChainData Labsprovider_key_f1030930
0x95f1de...11a5c
0.003 USDC0x159b06...a013a
View
GPT-4o Proxyflow_agentic_01a50e12e6c4
ModelStackprovider_key_f4030de9
0x0143f6...9aac3
0.003 USDC0x412105...d733b
View
Realtime Price Feedflow_agentic_4e419f81d3a5
ChainData Labsprovider_key_f1030930
0x6f4724...5b237
0.003 USDC0x6b4398...926bc
View
Realtime Price Feedflow_agentic_13e87b865ecf
ChainData Labsprovider_key_f1030930
0xb0221e...dcd43
0.003 USDC0x2cf6af...babf4
View
Realtime Price Feedflow_agentic_2dc8d65e5529
ChainData Labsprovider_key_f1030930
0x8bde6f...21611
0.003 USDC0xa16e5d...0605d
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.