# Saylor Innovations x402 Payment Test

> Saylor Innovations x402 Payment Test is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).

End-to-end x402 micropayment flow test that charges $0.001 USDC and returns payment settlement confirmation

## Facts

- Endpoint: GET https://saylorinnovations.com/api/x402/test?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-x402-payment-test-5709459f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4TiQ5uGq4JCcvxzjmdG-c

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-x402-payment-test-5709459f
```

Example prompt: Run a live x402 end-to-end payment test against the Saylor Innovations test endpoint using a GET request so I can confirm my micropayment integration is working and see the settlement details.

## When to prefer this

Choose this endpoint when you need a live, low-cost ($0.001 USDC) end-to-end smoke test of an x402 micropayment integration. It is purpose-built for developers validating that their x402 payment stack — including wallet, facilitator, and settlement — is functioning correctly before deploying real endpoints. Prefer it over mocked tests or static fixtures when you need to confirm actual USDC settlement occurs and observe the real settlement response schema.

## Known failure modes

- Payment fails to settle — returns non-ok response if USDC funds are insufficient or wallet not configured
- Invalid method — endpoint expects GET; other methods may be rejected
- Network timeout — fast latency expected but transient failures possible
- Payment facilitator unavailable — x402 facilitator service may be down causing settlement failure
- Malformed payment header — missing or invalid x402 payment header results in 402 response without settlement

## How this service works

x402 End-to-End Payment Test ($0.001) — Developer Tools

## Output

Returns a JSON object with an 'ok' boolean indicating success, a 'settlement' object containing payment settlement details, a 'received_at' ISO timestamp, an optional human-readable 'message', and an optional 'request' echo object reflecting the incoming request details.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "ok",
      "settlement",
      "received_at"
     ],
     "properties": {
      "ok": {
       "type": "boolean"
      },
      "message": {
       "type": "string"
      },
      "request": {
       "type": "object"
      },
      "settlement": {
       "type": "object"
      },
      "received_at": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-x402-payment-test-5709459f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)