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Agent Embassy — Agent Identity Renew
x402
Agent Embassy — Agent Identity Renew is a paid API for AI agents from aemb.pro, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-11).
Renews an agent's on-chain identity, records the authorization chain, and issues a tamper-evident embassy receipt proving what happened.
Price / call$0.25
Success—
StatusUnknown
How this service works
Agents pay for work and prove what happened.
Output
Returns a JSON object containing the tool name (agentid_renew), the full authorization chain array (request, authorization, action, proof, liability_boundary), completion status, the account address, the agent ID, a unique receipt ID (emb_...), and the receipt version (embassy-receipt/1). This receipt serves as tamper-evident proof that the renewal was authorized and executed.
Example use cases
Keeping agent credentials active
“My autonomous agent's Embassy ID is about to expire — renew it using account 0xAbCd1234...5678 and agent ID abc123...def456, and store the receipt so I can prove it's still authorized to act on my behalf.”
Proving authorized agent action after task completion
“My agent just finished a job — renew its Agent Embassy identity for account 0xDEAD...BEEF with agent ID 1234...abcd and get me the embassy receipt that proves the full authorization chain so I can show exactly what was sanctioned.”
Establishing liability boundary before high-stakes operation
“Before my agent executes the next workflow step, renew its identity on Agent Embassy for account 0x9999...0000 and agent ID fedcba...543210 so we have a clean proof-of-authorization and a liability boundary on record.”
Technical details
Endpoint
POSThttps://aemb.pro/v1/agent-id/renew?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to maintain an active, verifiable on-chain identity and produce cryptographic proof that its actions were authorized. It is specifically suited for agentic workflows where accountability, liability boundaries, and tamper-evident receipts are required — particularly when integrating with the Agent Embassy ecosystem. Prefer this over generic auth tokens or session renewal when you need an auditable chain of custody tying an agent action to a specific account.
Side effects
- Insufficient USDC payment — 402 Payment Required if payment header is missing or underfunded
- Invalid or expired agent ID — renewal rejected if the agent ID does not exist or is unrecognizable
- Invalid account address — malformed Ethereum address causes request failure
- Duplicate renewal attempt within the same validity window — may return conflict or idempotency error
- Network or chain congestion — slow on-chain confirmation may cause timeout
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| agent_id | string | The Agent ID string returned at issuance (64 hex characters; case-insensitive). Unknown IDs are rejected |
| validity_days | number | Days until the renewed Agent ID expires; integer 1-730. Defaults to the Embassy standard when omitted |
| idempotency_key | string | Optional idempotency key: UUID v4 (client-generated; published example keys are rejected). When provided, replaying the same key returns the original receipt instead of re-running the action; when omitted, no dedupe occurs. Keys are scoped per tool and per payer account: the same key on another tool — or from another wallet — is unrelated. |
| revocation_signature | string | Hex signature over the exact UTF-8 message agent-id-revoke:<OLD_agent_id> (64-char lowercase ID, no trailing newline) — the signature covers the OLD Agent ID being retired. EIP-191: personal_sign the message STRING (personal_sign envelope REQUIRED — raw ECDSA will not verify), 0x 65-byte hex r||s||v (v=27/28). ed25519: nacl.sign.detached over the message bytes, 64-byte hex. Signer: the principal's on-file revocation key, or the Embassy signer for cause |
Output
Schema · Response
{
"type": "json",
"example": {
"tool": "agentid_renew",
"chain": [
"request",
"authorization",
"action",
"proof",
"liability_boundary"
],
"status": "complete",
"account": "0x1111111111111111111111111111111111111111",
"agent_id": "fedcba9876543210fedcba9876543210fedcba9876543210fedcba9876543210",
"receipt_id": "emb_3c4d5e6f7890abcdef123456",
"receipt_version": "embassy-receipt/2"
}
}Tags
x402
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