Preflight before an agent pays an x402 seller
Preflight before an agent pays an x402 seller: screens the payTo wallet against the OFAC SDN address list, reads who registered the resource domain and when (RDAP), and screens that company against the OFAC, EU and UN lists. Returns ok, caution or block with one reason per finding.
Answeringour last check, 2026-10-18
1 of 1checks answered this week
329 msmedian answer time
$0.005listed price per call
$0.005price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://api.limitguard.ai/v1/seller/preflight
| Category | Company and compliance |
|---|---|
| Provider host | api.limitguard.ai |
| Networks | eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact, settled-transfer |
| Self-reported calls, 30 days | 3 from 3 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-18 | valid payment request | 402 | $0.005 | 329 ms |
Example input (from the provider)
{
"body": {
"pay_to": "0x7e4c2a91d05b3f68a1c9e2d4b7f05a3c6e81d290",
"resource_url": "https://api.example.com/v1/data"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"cachedTierAvailable": {
"type": "boolean"
},
"documentation_url": {
"type": "string"
},
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"network": {
"description": "CAIP-2 network of the quote (default eip155:8453); eip155:* or solana:*",
"type": "string"
},
"pay_to": {
"description": "The payTo wallet of the x402 quote you are about to pay",
"type": "string"
},
"resource_url": {
"description": "The https URL of the paid resource, on a public DNS name",
"type": "string"
}
},
"required": [
"pay_to",
"resource_url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"queryParams": {
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"note": {
"type": "string"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
},
"prepaidBalance": {
"properties": {
"balance_usd": {
"type": [
"number",
"null"
]
},
"note": {
"type": "string"
},
"price_usd": {
"type": "number"
},
"reason": {
"type": "string"
},
"topup": {
"properties": {
"curl": {
"type": "string"
},
"minimum_usd": {
"type": "integer"
},
"url": {
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
}
},
"required": [
"balance_usd",
"price_usd"
],
"type": "object"
},
"recovery": {
"properties": {
"curl": {
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"sandbox": {
"properties": {
"curl": {
"type": "string"
},
"note": {
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}