Index onlineMerchant portal
Api Endpoint

x402 Payment Firewall

Pre-payment risk firewall for AI agents: validate {recipient, amount, chain} BEFORE sending an x402 payment and get ALLOW/REVIEW/BLOCK in <200ms — OFAC blocklist, sanctioned-mixer check, runaway-overspend vs expected price and anomalous-amount guard. Stop an agent from overpaying or paying a bad address; transaction risk screening and payment guardrail before send. The hosted spending guard / agent budget protection an offline SDK cannot give.

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Offering

Provider
x402-endpoints.onrender.com
Method
GET
Offering type
Api Endpoint
Transport type
http
Category
Security
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://x402-endpoints.onrender.com/x402/payment-firewall
MIME type
application/json
First seen
2026-10-16T02:00:03.055Z
Last seen
Tags
x402-payment-firewall, spending-guard, pre-payment-risk, recipient-allowlist, anomalous-spend

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.005 USDC
Atomic price: 5000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "payTo": "0x1D1B81247C407521E2A01F3E21514870dcf1620f"
  }
]

Observed health

Status
Healthy
Latest latency
312 ms
Average latency
753 ms
HTTP status
402
Last checked
Reachability
100% over 9 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "const": "http"
    },
    "method": {
      "type": "string",
      "enum": [
        "GET",
        "HEAD",
        "DELETE"
      ]
    },
    "queryParams": {
      "type": "object",
      "properties": {
        "to_address": {
          "type": "string",
          "description": "Recipient/payTo address (EVM 0x.., Solana, BTC, TRON, XRP)"
        },
        "amount": {
          "type": "number",
          "description": "Payment amount in USD, e.g. 0.01"
        },
        "chain": {
          "type": "string",
          "description": "base | ethereum | solana | bitcoin | tron (optional; inferred from address)"
        },
        "expected_price": {
          "type": "number",
          "description": "Price the resource advertised — flags runaway overspend"
        }
      },
      "required": [
        "to_address"
      ]
    }
  },
  "required": [
    "type",
    "method"
  ],
  "additionalProperties": false
}

Output schema

{
  "type": "object",
  "properties": {
    "type": {
      "type": "string"
    },
    "example": {
      "type": "object"
    }
  },
  "required": [
    "type"
  ]
}