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Agent Budget Guard - Budget Check & Approval
x402
Agent Budget Guard - Budget Check & Approval is a paid API for AI agents from agent-budget-guard.onrender.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).
Checks whether an AI agent's spending request is within budget and approves or denies the transaction using x402 payment verification
Price / call$0.03
Success—
StatusUnknown
How this service works
Check budget and approve/deny AI agent spending with x402 payment verification
Output
Returns an approval or denial decision indicating whether the agent's spending request is within budget, along with remaining budget balance and any denial reason if the request is rejected.
Example use cases
Example prompt
“Before I make this $0.50 USDC purchase, check if agent 'data-collector-bot' still has budget remaining under its $5.00 daily spending cap and approve the transaction if it does.”
Technical details
Endpoint
POSThttps://agent-budget-guard.onrender.com/api/budget/checkWhen to prefer
Use this endpoint when you need to enforce spending limits on autonomous AI agents before they execute x402 micropayments — particularly in agentic pipelines where agents autonomously trigger payments and you need a guardrail to prevent runaway spending or budget overruns.
Side effects
- Budget already exhausted — returns denial with zero remaining balance
- Invalid or missing x402 payment token — returns authentication error
- Agent ID not recognized — returns unknown agent error
- Requested amount exceeds per-transaction limit — returns denial with limit details
- Service unavailable on Render free tier cold start — returns 503 timeout
Input
{
"amount": 1.5,
"agent_id": "test-agent-001",
"currency": "USDC",
"action_type": "api_call",
"daily_limit": 10
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| allow | boolean | |
| risk_level | string | |
| audit_status | string | |
| next_recommended | string | |
| remaining_budget | number | |
| approval_required | boolean |
Output
{
"allow": false,
"reason": "Transaction blocked due to anomalies: SUSPICIOUS: Late night payment at 4:00",
"approved": false,
"warnings": [
"MEDIUM: First payment to unknown API domain: ",
"SUSPICIOUS: Late night payment at 4:00"
],
"risk_level": "low",
"audit_status": "flagged",
"next_recommended": {
"url": "https://agent-security-gateway.onrender.com",
"reason": "予算管理データのセキュリティ強化と不正取引検出",
"api_name": "Agent Security Gateway",
"price_usdc": 0.05,
"expected_improvement": "90%予算保護強化"
},
"remaining_budget": 10,
"approval_required": true,
"current_daily_spend": 0
}Schema · Response
{
"type": "json",
"example": {
"allow": true,
"risk_level": "low",
"audit_status": "ready",
"next_recommended": "proceed_with_x402_payment",
"remaining_budget": 0.97,
"approval_required": false
}
}Tags
x402
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