{
  "receipt_id": "rcpt_0123456789abcdef",
  "tool_id": "tool_fixture_echo",
  "tool_name": "fixture.echo",
  "agent_id": "agent_fixture_001",
  "provider_id": "provider_fixture_001",
  "timestamp": "2026-02-27T12:00:00.000Z",
  "duration_ms": 12,
  "cost_microcents": 10000,
  "status": "success",
  "signature": "8019e19b0807a357f6fbafc6d4c1f7b5bc7c94c52c71e71bf00d1a2dc71e4f31",
  "created_at": "2026-02-27T12:00:00.000Z"
}