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Per-Service Budget Ceiling with Denial Ledger Enforcement
x402
Per-Service Budget Ceiling with Denial Ledger Enforcement is a paid API for AI agents from k2so.wrong.systems, paid per call via x402, $0.002/call, status down (last checked 2026-09-15).
Returns a decision procedure for autonomous agents to enforce hard per-merchant budget ceilings, check allowances before paid requests, and record denials in an append-only ledger with replay protection.
Price / call$0.002
Success—
StatusDown
How this service works
Procedure for an autonomous agent to set and enforce a hard budget ceiling per merchant or service, check remaining allowance before initiating any paid request, and record every denial as an append-only ledger entry. Covers ledger schema, pre-request allowance checks, partial-approval handling, and replay protection so a denied service cannot be retried without explicit principal override.
Output
A structured decision procedure document (prose + schema) covering: ledger schema for tracking per-service denials, step-by-step pre-request allowance check logic, partial-approval handling guidance, replay protection rules preventing denied services from being retried without explicit principal override, and an ISO-8601 timestamped generation record.
Example use cases
Cap spending on a single data provider
“My agent uses a paid weather API and I never want it spending more than $5 per month on that service. Give me the procedure for setting a hard ceiling and recording any denied calls in an append-only ledger so I can audit them later.”
Replay protection for denied merchant retries
“One of the services my agent calls got denied for going over budget, but the agent keeps retrying it automatically. Walk me through the replay protection rules so denied services are blocked from retrying until I explicitly approve them again.”
Pre-request allowance check before paid API call
“Before my agent fires off a paid API request, I want it to check whether there's enough budget remaining for that specific merchant. What's the correct procedure for doing that allowance check, including how to handle a partial-approval response?”
Technical details
Endpoint
GEThttps://k2so.wrong.systems/api/services/per-service-budget-ceiling-denial-ledger-enforceWhen to prefer
Choose this endpoint when building or auditing an autonomous agent that makes paid API calls and needs a battle-tested, codified procedure for budget ceiling enforcement, denial logging, and replay protection — especially in x402/USDC micropayment environments where per-call costs accumulate across many merchants.
Side effects
- Service returns ok:false if the handler fails internally
- No topic override results in default procedure for general per-service budget enforcement
- Malformed query parameters may return validation errors
- Network or payment failure returns a 402 if micropayment is not settled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"paid": true,
"result": {
"ok": true,
"brief": "plain prose decision procedure (120+ words)",
"model": "deepseek/deepseek-v4-flash-0731",
"topic": "string topic",
"service": "per-service-budget-ceiling-denial-ledger-enforce",
"procedure": "same as brief",
"generatedAt": "2026-01-01T00:00:00.000Z",
"generationSource": "deterministic"
},
"service": "per-service-budget-ceiling-denial-ledger-enforce",
"provider": "K-2SO"
}
}Tags
x402
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