Agent Embassy Assurance Check

x402

Agent Embassy Assurance Check 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).

Runs an authorization and proof-of-execution check on an agent action, returning a verdict, decision, and tamper-evident receipt.

Price / call$0.25

Seller volume →—

Success—

StatusUnknown

How this service works

Agents pay for work and prove what happened.

Output

Returns a JSON object with: tool name ('assurance_check'), the authorization chain steps (request, authorization, action, proof, liability_boundary), overall status, the agent account address, a pass/fail verdict, a decision string (e.g. ALLOW_WITH_RESTRICTIONS), a unique receipt_id, and a receipt_version string. Together these form a verifiable record of what the agent did and whether it was authorized.

Example use cases

Pre-action authorization gate

“Before my agent executes the file transfer, run an assurance check on account 0xABCDEF1234567890 and tell me whether I get an ALLOW or DENY decision so I know it's safe to proceed.”

Post-task audit receipt

“My agent just finished processing a payment — can you run an assurance check and get me a receipt ID and verdict so I have a tamper-evident record proving what happened?”

Liability boundary enforcement

“I need to enforce a liability boundary for my agent fleet — run an assurance check on the action and return the full authorization chain and any restrictions attached to the ALLOW decision.”

Technical details

Endpoint

POSThttps://aemb.pro/v1/assurance/check?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need a cryptographically traceable authorization and proof-of-execution record for an AI agent action — especially in multi-agent workflows where liability boundaries, compliance auditing, or payment-gated authorization are required. Prefer it over generic logging when you need a structured verdict and receipt that downstream systems or auditors can verify.

Side effects

Invalid or missing account address returns an error response
Unauthorized action may return a DENY decision rather than an error
Malformed request body causes a 400-level response
Payment not received (x402 protocol failure) returns 402 Payment Required
Service unavailability returns a 5xx error with no receipt issued

Input

Schema · Request body

Field	Type	Description
action	string	The action the agent intends to take, e.g. 'transfer' (required, max 200 chars)
context	string	Optional free-text context for the assessment (truncated to 2000 chars)
amount_usdc	string	Amount at stake, as a positive decimal string, e.g. '0.25'
idempotency_key	string	Idempotency key: UUID v4, client-generated, one per logical request. Replaying the same key on this tool returns the original receipt — the action is not re-run, and the first request's receipt wins even if you resend different inputs. Published example keys are rejected. Keys are scoped per tool and per payer account: a key never returns another wallet's receipt.
provider_endpoint	string	HTTPS URL of the provider to assess (max 2000 chars; no credentials in URL)
permissions_requested	array	Permissions the action needs, e.g. ['spend']. Non-empty array, max 50 entries; each entry truncated to 200 chars

Output

Schema · Response

{
  "type": "json",
  "example": {
    "tool": "assurance_check",
    "chain": [
      "request",
      "authorization",
      "action",
      "proof",
      "liability_boundary"
    ],
    "status": "complete",
    "account": "0x1111111111111111111111111111111111111111",
    "verdict": "pass",
    "decision": "ALLOW_WITH_RESTRICTIONS",
    "receipt_id": "emb_pqr678",
    "receipt_version": "embassy-receipt/2"
  }
}

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