Grade one x402 route's Bazaar discovery metadata
Grade one x402 route's Bazaar discovery metadata. Returns the diagnosis only: both x402 SDK validator verdicts, the schema-quality score, itemized defects with severities (hollow output schemas, over-500-char descriptions, wrong asset addresses, failed validation), and a 0-100 grade. Use this when you operate an x402 route and want to know exactly what is broken before paying for the repair.
Answeringour last check, 2026-10-24
1 of 1checks answered this week
1456 msmedian answer time
$0.1listed price per call
$0.1price 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://list-smith-production.up.railway.app/v1/grade
| Category | Everything else |
|---|---|
| Provider host | list-smith-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 |
|---|---|---|---|---|
| 2026-10-24 | valid payment request | 402 | $0.1 | 1456 ms |
Example input (from the provider)
{
"body": {
"resource_url": "https://target.example.com/v1/thing"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"resource_url": {
"description": "Full URL of the x402 resource to grade, e.g. https://service.example.com/v1/endpoint",
"type": "string"
},
"sample_output": {
"description": "Optional: one real response body from the endpoint. When supplied, the grade also checks it against the endpoint's published output schema."
}
},
"required": [
"resource_url"
],
"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": {
"defects": {
"items": {
"properties": {
"detail": {
"type": "string"
},
"name": {
"type": "string"
},
"severity": {
"enum": [
"critical",
"major",
"minor"
],
"type": "string"
}
},
"required": [
"name",
"severity",
"detail"
],
"type": "object"
},
"type": "array"
},
"extension_present": {
"type": "boolean"
},
"fix_available": {
"description": "True when the endpoint presents a valid challenge /v1/fix can repair against",
"type": "boolean"
},
"graded_at": {
"description": "ISO-8601 timestamp of the probe",
"type": "string"
},
"http_status": {
"type": [
"integer",
"null"
]
},
"reachable": {
"type": "boolean"
},
"resource_url": {
"type": "string"
},
"schema_quality": {
"properties": {
"deductions": {
"items": {
"properties": {
"detail": {
"type": "string"
},
"name": {
"type": "string"
},
"points": {
"minimum": 0,
"type": "integer"
}
},
"required": [
"name",
"points",
"detail"
],
"type": "object"
},
"type": "array"
},
"extension_present": {
"type": "boolean"
},
"hollow": {
"type": [
"boolean",
"null"
]
},
"score": {
"type": [
"integer",
"null"
]
}
},
"required": [
"extension_present",
"hollow",
"score",
"deductions"
],
"type": "object"
},
"score": {
"description": "Listing grade: 100 (clean) to 0, from the itemized defects",
"maximum": 100,
"minimum": 0,
"type": "integer"
},
"sdk_validation": {
"properties": {
"consistency_valid": {
"type": [
"boolean",
"null"
]
},
"errors": {
"items": {
"type": "string"
},
"type": "array"
},
"ran": {
"description": "False when there was no extension to validate",
"type": "boolean"
},
"spec_valid": {
"type": [
"boolean",
"null"
]
}
},
"required": [
"ran",
"consistency_valid",
"spec_valid",
"errors"
],
"type": "object"
},
"terms": {
"properties": {
"amount_units": {
"type": [
"string",
"null"
]
},
"asset": {
"type": [
"string",
"null"
]
},
"found": {
"type": "boolean"
},
"network": {
"type": [
"string",
"null"
]
},
"pay_to": {
"type": [
"string"