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x402 Agent Suite Spend Governor Check
x402
x402 Agent Suite Spend Governor Check is a paid API for AI agents from x402-agent-suite-production.up.railway.app, paid per call via x402, $0.030000/call, status unknown (last checked 2026-10-02).
Validates whether a proposed spend action falls within a configured policy's daily cap, per-call cap, and allowed host restrictions before authorizing payment.
Price / call$0.030000
Success—
StatusUnknown
How this service works
24 paid x402 infrastructure APIs for AI agent fleets: buy advisor, audition coach, guard, proxy, MPP, attestations, and pipeline orchestration.
Output
Returns a decision indicating whether the proposed spend is within the configured policy limits, including whether the estimated cost is below the per-call cap, whether the daily cap would be exceeded, and whether the target URL's host is in the allowed list.
Example use cases
Example prompt
“Before calling that paid API endpoint, check if spending $0.05 USDC is within policy for agent 'agent-42' targeting api.weatherprovider.com — the policy allows $2.00/day, $0.10 per call, and only permits requests to api.weatherprovider.com and api.dataprovider.com.”
Technical details
Endpoint
POSThttps://x402-agent-suite-production.up.railway.app/api/spend-governor/check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, policy-enforced pre-authorization check before an AI agent commits to a paid API call. It is specifically designed for autonomous agent workflows where you want to enforce daily budget caps, per-call spending limits, and host allowlists without executing the actual payment. Prefer this over general budget tracking tools when you need a structured policy object with allowedHosts enforcement in the x402 agent suite ecosystem.
Side effects
- Policy fields missing (dailyCapUsdc, perCallCapUsdc, or allowedHosts absent) — returns 400 validation error
- Target host not in allowedHosts list — returns denial/rejection response
- Estimated cost exceeds perCallCapUsdc — returns over-limit response
- Daily cap would be exceeded by this spend — returns budget exhausted response
- Invalid network value — may return 400 or unknown network error
- Service unavailable — returns 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"allowed": true,
"summary": "Paid response after x402 settlement"
}
}Tags
x402
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