Overview
[Spend policy: agent payment risk check] Before an AI agent pays an invoice or merchant: POST {payment, policy} -> allow / deny / needs_approval plus the rules that fired (per-tx limit, rolling cap, merchant categories, allow/deny lists, hours + timezone, assets/chains, approval threshold) and an Ed25519-signed receipt bound to your request hash. Deterministic, stateless, no custody, moves no money. Bad bodies rejected before payment. $0.02 USDC.
Protocol
x402 (POST)
Price
$0.02
Payment Asset
USD Coin
Payment Network
eip155:8453
Category
uncategorized
Provider
GW8 Signal API
Indexed
2026-10-21 22:23:41
Health
Status
healthy
Latency (p50)
435ms
Uptime (30d)
100.0%
Reliability Score
95/100
Last Checked
2026-10-31 07:12:58
Last Healthy
2026-10-31 07:12:58
Consecutive Failures
0
Input Schema
{
"body": {
"payment": {
"agentId": "ap-agent-7",
"amount": "420.00",
"chain": "base",
"currency": "USDC",
"memo": "INV-10442",
"merchantCategory": "office-supplies",
"recipientDomain": "acme-supplies.com",
"recipientId": "acct_acme_supplies",
"timestamp": "2026-10-21T15:30:00Z"
},
"policy": {
"allowList": [
"acme-supplies.com"
],
"allowedAssets": [
"USDC"
],
"allowedChains": [
"base"
],
"allowedHours": {
"days": [
"mon",
"tue",
"wed",
"thu",
"fri"
],
"end": "18:00",
"start": "08:00",
"timezone": "America/Denver"
},
"blockedCategories": [
"gambling",
"crypto-exchange"
],
"currency": "USDC",
"perTxLimit": "1000",
"requireApprovalAbove": "750",
"rollingCap": {
"limit": "5000",
"spentSoFar": "1200",
"windowHours": 24
}
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Output Schema
{
"example": {
"checks": [
{
"detail": "420 <= per-tx limit 1000",
"result": "pass",
"rule": "per_tx_limit"
}
],
"decision": "allow",
"decisionReceipt": {
"accessType": "SPEND_POLICY_DECISION",
"alg": "Ed25519",
"endpoint": "POST /api/spend/check",
"payload": "eyJ2Ijox…",
"query": {
"decision": "allow",
"requestSha256": "7faa…"
},
"response_sha256": "…",
"signature": "base64…",
"signed": true,
"verify_url": "https://micro-saas-agent.onrender.com/api/receipt/verify"
},
"engine": "gw8-spend-policy/1",
"reasons": [],
"remaining": {
"perTx": "1000",
"rollingCapAfter": "3380",
"rollingCapBefore": "3800"
}
},
"type": "json"
}