x402 readiness check for any paid API URL
x402 readiness check for any paid API URL: probes it without paying and reports whether it returns a valid 402, where the requirements are (header or body, v1 or v2), network, asset, price in USD, payTo (with EIP-55 checksum check), EIP-712 token domain, timeout, resource URL and Bazaar discovery. Returns ready or needs_fixes with a 0-100 score and a list of specific issues. Use before you list an endpoint or let an agent pay it. Never sends a payment.
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
GET https://agent-tools.jbarkules.workers.dev/v1/x402/check
| Category | Market data |
|---|---|
| Provider host | agent-tools.jbarkules.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
We never call tools that send, buy, move money or file anything, not even without paying.
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"url": "https://agent-tools.jbarkules.workers.dev/v1/fx/rates"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"method": {
"description": "Optional. Default tries GET, then POST if GET returns 404 or 405",
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"description": "Public http(s) URL of the paid endpoint to probe",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}