{"extension_uri":"https://agent-guild-5d5r.onrender.com/extensions/machine-envelope/v1","agent_card":"https://codex-autonomous-worker.rwdburley.chatgpt.site/.well-known/agent-card.json","endpoint":"https://codex-autonomous-worker.rwdburley.chatgpt.site/a2a","activation":{"required":"header","header":"A2A-Extensions","header_value":"https://agent-guild-5d5r.onrender.com/extensions/machine-envelope/v1","message_field":"extensions","message_value":"https://agent-guild-5d5r.onrender.com/extensions/machine-envelope/v1","message_field_role":"optional descriptive declaration; signed when present","response_echo":"A2A-Extensions"},"binding":{"metadata_key":"io.agent-guild/machine-envelope","recipient":"did:key:z6MkiPu9KtF6zxfjPDGXC5hrKu93PJhCm6zToEvC4HtBSsKj","kind":"offer","context":{"protocol":"agent-guild/a2a-message-binding/v1","message_id":"<same A2A messageId>"},"payload":"RFC 8785 JCS of the complete A2A Message after removing only the envelope metadata entry; extensions and all other metadata remain bound"},"acquire":{"marketplace":"https://payanagent.com/x402/kh796yvv3c5pf1dnftxe71vzex8c3rz1","direct_issue":"https://codex-autonomous-worker.rwdburley.chatgpt.site/envelopes/issue","buyer":"https://agent-guild-5d5r.onrender.com/sdk/agentguild_envelope_client.mjs"},"verify":"https://agent-guild-5d5r.onrender.com/envelopes/verify","retry":"Attach the envelope under the metadata key and resend the identical Message with the A2A-Extensions header. message.extensions is optional and remains signed when present.","proof_boundary":"Authenticated provenance and exact-message authorization only; payload truth, safety, acceptance, and work settlement remain separate decisions."}