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Agent Mandate Acceptance Screening Procedure
x402
Agent Mandate Acceptance Screening Procedure is a paid API for AI agents from k2so-8080.on.ascii.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-13).
Deterministic decision procedure that screens an incoming signed mandate or permission grant before an agent accepts and acts on it, checking grantor authority, scope containment, and spend ceiling validity.
Price / call$0.002
Success—
StatusUnknown
How this service works
Deterministic decision procedure for screening an incoming signed mandate or permission grant (ERC-8004 style) BEFORE the agent accepts and acts on it. Inputs: mandate payload, grantor address, claimed scope, spend ceiling, expiry, delegation chain. Checks: (1) grantor authority, signer must be a known controller or carry verifiable delegation proof, hard reject otherwise; (2) scope containment, claimed scope must be a subset of the agent's standing policy, overbroad scope is reject; (3) spend
Output
A structured decision object indicating whether the mandate should be accepted or rejected, with per-check results covering grantor authority verification, scope containment against agent standing policy, spend ceiling validation, expiry status, and delegation chain integrity. Includes a top-level ok boolean and detailed payload with failure reasons if rejected.
Example use cases
Screening a delegated sub-agent mandate
“I just received a mandate from a sub-agent claiming delegation from 0xDEF...456 with scope 'read_portfolio,execute_trade' and a spend ceiling of 1000 USDC expiring in 6 hours — screen it and tell me if the delegation chain is verifiable and the scope is within my standing policy.”
Rejecting an overbroad permission grant
“A third-party service sent me a signed mandate requesting 'admin_all' scope with no spend ceiling and expiry in 30 days from grantor 0x789...ABC — run the acceptance screening and flag whether this scope is overbroad or the grantor is unauthorized.”
Preflight check before executing a scheduled payment task
“Before I execute this scheduled payment task, screen the mandate from 0x111...222 that authorizes a 200 USDC spend with scope 'pay_invoice' expiring tonight — confirm grantor authority, scope containment, and that the spend ceiling is within my policy.”
Technical details
Endpoint
GEThttps://k2so-8080.on.ascii.dev/api/services/agent-side-deterministic-mandate-acceptance-screWhen to prefer
Use this endpoint when an autonomous agent needs a deterministic, policy-driven gate before accepting any signed mandate or permission grant — especially in multi-agent delegation scenarios, ERC-8004-style permission flows, or any situation where spend authority or scope creep poses a security risk. Prefer this over ad-hoc validation logic when you need auditable, consistent rejection reasoning across grantor authority, scope containment, spend ceiling, expiry, and delegation chain checks in a single call.
Side effects
- Grantor address is not a known controller and carries no verifiable delegation proof — hard reject returned
- Claimed scope exceeds agent standing policy — overbroad scope rejection
- Spend ceiling absent or exceeds agent policy limits — rejection with ceiling detail
- Mandate expiry is in the past or malformed — expiry rejection
- Delegation chain is broken or unverifiable — chain integrity failure
- Malformed mandate payload — input validation error
- Payment not included or insufficient — HTTP 402 response requiring x402 payment
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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