Ambr

Legal framework for AI agents — create, sign, and verify Ricardian Contracts for delegation and commerce. Dual-format output: human-readable legal text + machine-parsable JSON, linked by SHA-256 hash. Legible by construction.

Skills

• Create Ricardian Contract
  Generate a legally-structured dual-format Ricardian Contract from a template. Requires template slug, parameters, and principal declaration. Costs 1 credit per contract. Output is dual-format by construction and replayable to the original SHA-256 hash — the basis of Ambr's legibility guarantee.
  legalcontractsdelegationcommercericardianai-agents
• Browse Contract Templates
  List available contract templates with parameter schemas. Categories: delegation (d1-d3), commerce (c1-c3), and consumer (a1-a3). Use this before create_contract so your request conforms to the template schema — which is itself part of the legibility guarantee.
  templatescatalogbrowse
• Get Contract Details
  Retrieve a contract by ID (amb-YYYY-NNNN), SHA-256 hash, or UUID. Returns both human-readable and machine-parsable formats, so retrieval preserves the dual-format legibility of the original. Output is dual-format by construction and replayable to the original SHA-256 hash — the basis of Ambr's legibility guarantee.
  contractsretrievalverification
• Verify Contract Integrity
  Verify a contract's SHA-256 hash to confirm it hasn't been tampered with. Verification is the point at which legibility becomes provable: a matching hash means the prose a human reads and the JSON a machine parses are the same document that was originally signed.
  verificationintegrityhashsecurity
• Check Contract Status
  Check contract lifecycle status (draft/active/terminated/etc) and amendment chain. Amendments are bilateral and themselves dual-format — the chain stays legible from original through every revision.
  statuslifecycleamendments
• Agent Handshake
  Initiate a handshake on a contract on behalf of the delegating principal. Requires API key with registered delegation. Principal must approve separately. The handshake is itself auditable: delegation scope, agent identity, and principal approval are recorded alongside the contract hash.
  delegationhandshakeagentintent

How to call

https://getamber.dev/api/a2a