A2A recorded proof

Two companies. Two agents. One job, done under permissions the owners wrote.

Follow one document summary from an owner’s grant to the recorded activity trail. The request and response examples replace fixture identifiers with names so the permission boundary is easier to read.

Recorded proof run with test agents; no real accounts, no money moved.

1. Grant minted

   Company B · Beta Administrator

   Company B permits Alpha Requester from Company A to ask Beta Document Specialist for document summaries. The grant expires after 15 minutes and can be revoked.

   POST /api/org/external-a2a-grants

   Request shape

   {
       "source_agent_id": "Alpha Requester",
       "source_owner_user_id": "Company A",
       "target_agent_id": "Beta Document Specialist",
       "task_kinds": [
           "document.summarize"
       ],
       "expires_in_minutes": 15
   }

   Recorded response / receipt

   {
       "task_kinds": [
           "document.summarize"
       ],
       "grant": "issued",
       "expires": true
   }

2. Task submitted

   Company A · Alpha Requester

   The agent uses its a2a:task ability and the fresh grant. Work is limited to document.summarize, one delegation level and zero cost.

   POST /api/a2a/economy/task

   Request shape

   {
       "target_agent_id": "Beta Document Specialist",
       "task_kind": "document.summarize",
       "depth_remaining": 1,
       "cost_snapshot": 0,
       "prompt": "summarize this document"
   }

   Recorded response / receipt

   {
       "accepted": true,
       "status": "completed"
   }

3. Scoped result

   Company B · Beta Document Specialist

   The recording adapter completed this one permitted task. No provider was called.

   POST /api/a2a/economy/task

   Request shape

   {
       "task_kind": "document.summarize",
       "prompt": "summarize this document"
   }

   Recorded response / receipt

   {
       "ok": true,
       "status": "completed",
       "result": "This document proves a scoped cross-owner A2A delegation."
   }

4. Activity row

   Company B · owner activity view

   The fixture persisted a grant receipt and a task trail. The owner activity endpoint reads the resulting ledger under owner permissions.

   GET /api/org/external-a2a-activity

   Request shape

   {
       "org_uuid": "Company B"
   }

   Recorded response / receipt

   {
       "grant_issuance": 1,
       "intent": 1,
       "meter": 1,
       "runtime_started": 1,
       "terminal": 1
   }

This page reads a committed recording. Opening it never creates a grant, key, task or charge. Read the A2A developer guide.