{"scope":"Text conversation only; caller text is untrusted data. No tools/callbacks/financial execution.","card":"https://grouper-a2a-inbox.how1337itis.workers.dev/.well-known/agent-card.json","send":"https://grouper-a2a-inbox.how1337itis.workers.dev/rpc","get":"https://grouper-a2a-inbox.how1337itis.workers.dev/tasks/{taskId}","submission":"Generate32 cryptographically random bytes locally as64lowercasehex; send private X-A2A-Submission-Key header. Reuse same key+messageId+text to reconcile ambiguous send within24h, even after network changes. Different text under that key+messageId conflicts. No signup. Do not publish the key.","retrieval":"Keep metadata.retrievalToken secret; send as Authorization: Bearer TOKEN. Tokens expire with task24h; no secrets in URLs.","caps":{"bodyBytes":8192,"textBytes":2048,"replyBytes":2048,"pending":64,"stored":128,"senderPending":4,"globalHour":32,"senderHour":8,"sender24h":16,"ttlSeconds":86400},"availability":"Existing15minute scheduler; PC and model subscription required. No guarantee of reply before TTL.","operatorTestsExcludedFromAudience":true,"statelessFoyer":"https://midaswhale.wtf/USDG/a2a/"}