Add Ambr — production A2A agent for Ricardian Contracts

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What is Ambr?

Ambr is a production A2A agent providing legal contract management for AI agents. It creates, signs, and verifies dual-format Ricardian Contracts — human-readable legal text paired with machine-parsable JSON, linked by SHA-256 hash.

Agent Card: https://getamber.dev/.well-known/agent.json

Skills (6)

• create_contract — Generate legally-structured Ricardian Contracts from templates
• list_templates — Browse contract templates (delegation d1-d3, commerce c1-c3)
• get_contract — Retrieve contracts by ID, SHA-256 hash, or UUID
• verify_hash — Verify contract integrity via SHA-256
• get_status — Check lifecycle status and amendment chain
• agent_handshake — Accept/reject contracts on behalf of a principal

Details

• Website: https://ambr.run
• Platform: https://getamber.dev
• Protocol: A2A (JSON-RPC over HTTP)
• Auth: API key (X-API-Key) or x402 pay-per-contract (USDC on Base L2)
• Category: Platforms & Integrated Solutions