utilpeek (Tanod) x402 listing lint
utilpeek (Tanod) x402 listing lint: description, resource URL, schema and payment fields checked, with a suggested description. Use when an agent must check an x402 listing against the Bazaar and CDP rules before publishing it.
Answeringour last check, 2026-10-10
1 of 1checks answered this week
215 msmedian answer time
$0.001listed price per call
$0.001price 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://tanod.dev/v1/x402/lint
| Category | Code and developer |
|---|---|
| Provider host | tanod.dev |
| Networks | eip155:137, 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 |
|---|---|---|---|---|
| 2026-10-10 | valid payment request | 402 | $0.001 | 215 ms |
Example input (from the provider)
{
"body": {
"listing": {
"accepts": [
{
"amount": "10000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"network": "eip155:8453",
"payTo": "0x209693Bc6afc0C5328bA36FaF03C514EF312287C",
"scheme": "exact"
}
],
"resource": {
"description": "Weather forecast for a city.",
"mimeType": "application/json",
"url": "https://api.example.com/v1/weather"
},
"x402Version": 2
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"listing": {
"anyOf": [
{
"additionalProperties": true,
"type": "object"
},
{
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"description": "The listing to lint, as JSON: an x402 PaymentRequired object (v1 or v2), a bare accepts[] entry or a Bazaar discovery item. The JSON text or the base64 PAYMENT-REQUIRED header value of one is accepted as a string. At most 1 MB. Send this or `url`."
},
"url": {
"anyOf": [
{
"maxLength": 2048,
"minLength": 9,
"type": "string"
},
{
"type": "null"
}
],
"default": null,
"description": "An https x402 endpoint: it is fetched once (GET, else POST if GET is 405) and its 402 response (PAYMENT-REQUIRED header, else body) is linted. Public https hosts only. Send this or `listing`."
}
},
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"checked_at": {
"type": "string"
},
"checks_passed": {
"type": "integer"
},
"description_length": {
"type": "integer"
},
"errors": {
"type": "integer"
},
"http_status": {
"type": "integer"
},
"method": {
"type": "string"
},
"note": {
"type": "string"
},
"problems": {
"items": {
"properties": {
"code": {
"type": "string"
},
"message": {
"type": "string"
},
"severity": {
"enum": [
"error",
"warning"
],
"type": "string"
}
},
"required": [
"code",
"severity",
"message"
],
"type": "object"
},
"type": "array"
},
"read_from": {
"enum": [
"header",
"body"
],
"type": "string"
},
"score": {
"maximum": 100,
"minimum": 0,
"type": "integer"
},
"source": {
"enum": [
"listing",
"url"
],
"type": "string"
},
"suggested_description": {
"type": "string"
},
"suggested_length": {
"type": "integer"
},
"url": {
"type": [
"string",
"null"
]
},
"warnings": {
"type": "integer"
}
},
"required": [
"source",
"problems",
"score",
"errors",
"warnings",
"suggested_description",
"checked_at"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}