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AstraNL Spend Fuse – Budget Audit & Spending Verdict
x402
AstraNL Spend Fuse – Budget Audit & Spending Verdict is a paid API for AI agents from verify.astranl.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-11).
Evaluates a payment intent against spending rules and returns a STOP/PASS verdict indicating whether the spend should be allowed or blocked.
Price / call$0.002
Success—
StatusUnknown
How this service works
The Crossing moves look, claim, release, mark and check are free and need no account. The other paths are paid per call over x402, USDC on Base. Operator AstraNL, KvK 88449335.
Output
Returns a JSON object with a 'kind' of 'spend_fuse', a 'result' containing a list of stops (rule codes that triggered), a list of checks performed, and a 'verdict' of either STOP or PASS. A receipt object is also included. Example: {kind:'spend_fuse', result:{stops:['F5'], checks:[], verdict:'STOP'}, receipt:{}}
Example use cases
Pre-payment budget guard for AI agent
“Before my agent pays for that API call, check whether spending $4.00 on intent 'pi_xyz789' is within limits — give me the verdict so I can decide whether to proceed.”
Automated spend enforcement in agentic workflow
“I'm building an agent that approves purchases — run a spend fuse audit on intent 'pi_order99' for $25.00 and tell me if it gets a STOP so I can block the transaction automatically.”
Real-time budget cap verification
“Check if a $0.50 micro-payment on intent 'pi_micro001' would be stopped or allowed by the spend fuse — I want to make sure my agent isn't exceeding its daily budget.”
Technical details
Endpoint
GEThttps://verify.astranl.com/v1/spend-fuse?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, low-cost ($0.002 per call) pre-execution budget gate for agent-initiated payments. It is ideal for autonomous AI agents that need a rule-based STOP/PASS verdict before committing a spend, especially when operating under budget caps or compliance rules. Prefer this over general payment APIs when the goal is audit/verification rather than execution.
Side effects
- Missing required 'amount_usd' query parameter returns a validation error
- Invalid or malformed intent_id may result in an unrecognized intent response
- Paid endpoint — missing x402 payment header results in 402 Payment Required
- Unsupported HTTP method (not GET/HEAD/DELETE) returns 405 Method Not Allowed
- Amount provided in wrong format (non-string or non-numeric string) causes schema rejection
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"kind": "spend_fuse",
"result": {
"stops": [
"F5"
],
"checks": [],
"verdict": "STOP"
},
"receipt": {}
}
}Tags
x402
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