Assurance Check
assurance_checkIdempotent
Use assurance_check for a go/no-go before your agent acts on a provider. Give the provider endpoint, the planned action, the amount at stake, and the permissions requested. We probe unpaid and return a signed ALLOW, ALLOW_WITH_RESTRICTIONS, ASK_HUMAN, REVERIFY, REROUTE, or QUARANTINE decision (or UNVERIFIED). Envelope only: trust_report. Cost and policy: preflight_check. POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header. See https://docs.cdp.coinbase.com/x402 Paid tool — $0.25, USDC on Base or Arbitrum One. Paid URL: https://aemb.pro/v1/assurance/check.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| action | Yes | The action the agent intends to take, e.g. 'transfer' (required, max 200 chars) | |
| context | No | Optional free-text context for the assessment (truncated to 2000 chars) | |
| amount_usdc | Yes | Amount at stake, as a positive decimal string, e.g. '0.25' | |
| idempotency_key | Yes | 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 | Yes | HTTPS URL of the provider to assess (max 2000 chars; no credentials in URL) | |
| permissions_requested | Yes | Permissions the action needs, e.g. ['spend']. Non-empty array, max 50 entries; each entry truncated to 200 chars |
Output Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| how | Yes | How to pay: POST the tool inputs as JSON to paid_url with an x402 v2 PAYMENT-SIGNATURE header | |
| tool | Yes | Tool name, e.g. ping | |
| asset | Yes | Settlement asset | |
| price | Yes | Exact price, e.g. "$0.05" | |
| networks | Yes | EVM CAIP-2 network ids accepted | |
| paid_url | Yes | x402-paid HTTPS URL to POST the tool inputs to | |
| facilitator | Yes | x402 facilitator | |
| payment_required | Yes | Always true: this MCP tool is a payment pointer; the tool itself is monetized via x402. |