{"endpoint":"POST https://apis.io/api/v1/agents/register","body":{"card_url":"https://<your-host>/.well-known/agent-card.json","operator":"<optional>","contact":"<optional>"},"gate":"Your card must be fetchable and pass the three A2A 1.0.0 hard checks: capabilities is an object, protocolVersion present, skills is an array.","responses":{"202":"queued for review","422":"card not served, not JSON, or not conformant — the body says which"},"keyless":true,"registry":"https://apis.io/agents/","docs":"https://apis.io/agents/register/"}