merchant backend live

x402 starts payment. AAP settles delivery.

This demo merchant returns an x402 payment challenge for protected resources. SettleProof adds the post-payment liability path: custody, merchant delivery attestation, evidence packet, and deterministic release or TTL refund.

NetworkSolana devnet

Price1 USDC

Modex402 live

Asset22jtLHKwRy6RVrzbprsTSMBNfhG7b11d7iY7MBS4Mek3

Guided end-to-end demo

Follow the exact autonomous settlement path from HTTP 402 challenge to on-chain custody, merchant attestation, evidence trail, deterministic release/refund, and indexed settlement state.

1. Challenge Agent calls a protected merchant API The merchant returns HTTP 402 with an AAP-compatible payment challenge.

2. Custody Agent creates escrow on Solana devnet USDC moves into the AAP custody vault. SettleProof never receives private keys.

3. Attest Merchant signs proof of delivery The merchant attestor key signs the proof hash. The contract verifies Ed25519 on-chain.

4. Resolve Funds release or refund deterministically Valid proof releases USDC. Missing proof before TTL returns funds to the agent owner.

5. Index API records settlement state The persistent indexer exposes escrow and event state for headless agents.

cd packages/sdk-ts
MERCHANT_URL=https://demo.settleproof.xyz \
TARGET_URL=https://settleproof.xyz \
bun run examples/agent-cli.ts

Protected Resources

x402 response

Select a protected resource to inspect the x402/AAP challenge.

Headless Agent Path

This merchant screen is the visual harness. Agents can run the same settlement path through the public API and SDK without opening the dashboard.

API Status Merchant Registry Proof Templates Merchant Escrows

1 Prepare

POST /v1/escrows/prepare Derive escrow PDA, vault ATA, agent ATA, merchant PDA, and task hash.

2 Sign

@aap/sdk-ts createEscrow Agent signs locally. API never receives private keys.

3 Relay

POST /v1/relay Broadcast a fully signed Solana transaction.

4 Index

GET /v1/indexer Poll pending, fulfilled, refunded, or merchant filtered escrows.

5 Evidence

GET /v1/evidence/:pda Export delivery proof, TTL, release/refund state, and audit links.