Pre-Trade Guard — before you pay an x402 listing, screen the payTo you are about
Pre-Trade Guard — before you pay an x402 listing, screen the payTo you are about to pay: its Verdict Index catalog history (first seen, payTo rotations, listings added or removed across the snapshots held), an OFAC SDN exact-match check, and the wallet's Base age and activity, combined into PROCEED, CAUTION, or ABORT with itemized reasons. Use this when an agent is about to pay a payTo it has never paid before.
Answeringour last check, 2026-10-31
2 of 2checks answered this week
1109 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://stall-row-production.up.railway.app/v1/pre-trade-guard
| Category | Company and compliance |
|---|---|
| Provider host | stall-row-production.up.railway.app |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.005 | 892 ms |
| 2026-10-29 | valid payment request | 402 | $0.005 | 1326 ms |
Example input (from the provider)
{
"body": {
"amount": 20000,
"pay_to": "0x097f9685D1e0752bF8B02d61E5Ce9be7eA0FBA7F",
"resource": "https://stall-row-production.up.railway.app/v1/wallet-verdict"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"amount": {
"type": [
"integer",
"string",
"null"
]
},
"network": {
"type": [
"string",
"null"
]
},
"pay_to": {
"type": "string"
},
"resource": {
"type": [
"string",
"null"
]
}
},
"required": [
"pay_to"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"amount": {
"type": [
"integer",
"string",
"null"
]
},
"index": {
"type": "object"
},
"limits": {
"type": "string"
},
"network": {
"type": "string"
},
"not_checked": {
"type": "string"
},
"pay_to": {
"type": "string"
},
"reasons": {
"items": {
"properties": {
"detail": {
"type": "string"
},
"name": {
"type": "string"
},
"points": {
"type": "integer"
}
},
"required": [
"name",
"points",
"detail"
],
"type": "object"
},
"type": "array"
},
"resource": {
"type": [
"string",
"null"
]
},
"risk_score": {
"type": "integer"
},
"sanctions": {
"type": "object"
},
"unknown_legs": {
"items": {
"type": "string"
},
"type": "array"
},
"verdict": {
"enum": [
"PROCEED",
"CAUTION",
"ABORT"
],
"type": "string"
},
"wallet": {
"type": "object"
}
},
"required": [
"pay_to",
"verdict",
"risk_score",
"sanctions",
"index",
"wallet",
"reasons"
],
"type": "object"
},
"schema": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}