Agentic Commerce Protocols | AI Protocols
Agent Payments Protocol (AP2) Cryptographic Mandates
Deploys cryptographic trust infrastructure at /.well-known/ap2/mandates.json using dedicated ECDSA P-256 keys, verifiable JWS mandate signatures, spending thresholds, and PostgreSQL revocation ledgers.
Executive Summary
The Agent Payments Protocol (AP2) Trust Layer issues and verifies ECDSA P-256 JWS cryptographic mandates (Cart and Intent mandates) so every autonomous agent transaction carries provable buyer authorization, spending limits, and non-repudiation.
ES256
ECDSA P-256 JWS cryptographic signing
100%
Verifiable non-repudiation audit trail
<15ms
Mandate signature verification time
Production Deliverables
- Dedicated ECDSA P-256 keypair provisioning and public JWK publication
- Signed /.well-known/ap2/mandates.json authority registry
- Cart and Intent mandate verification middleware enforcing TTL and max-amount caps
- Immutable PostgreSQL ap2_mandates ledger with instant revocation API
Deployment Sequence
01. Key Ceremony & JWK Publication
Generates isolated P-256 signing keys and exposes verifiable public JWK metadata.
02. Policy & Threshold Guardrails
Configures maximum autonomous spend ceilings, currency locks, and human-in-the-loop escalation rules.
03. Non-Repudiation Ledger
Stores signed JWS receipts and payload hashes in PostgreSQL for compliance and dispute defense.
Technical Questions & Specifications
Why do autonomous transactions require AP2 on top of standard TLS?
TLS only authenticates the network channel. AP2 cryptographically proves that a specific human or corporate principal authorized an agent to spend up to a defined ceiling with a specific merchant prior to execution.
Can a corporate buyer revoke an active agent mandate immediately?
Yes. Every mandate carries a unique mandate_id checked against our real-time revocation table before checkout settlement.
Coupled Capabilities in This Coil
Complimentary Diagnostic
Agentic Commerce Readiness Audit
Nine-pillar technical diagnostic across protocols, schema graphs, SSR speed, and AI citation share.
$8,500 implementation
Universal Commerce Protocol (UCP) Stack
Publish machine-readable capability, catalog, and fulfillment manifests at /.well-known/ucp.
$12,500 implementation
Agentic Commerce Protocol (ACP) Checkout Engine
Enable AI agents to negotiate scopes, calculate deterministic pricing, and initiate checkout.