# Paid Ping (x402 Test)

> Paid Ping (x402 Test) is a paid API for AI agents from bess-x402.onrender.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns the server's UTC time and echoes an optional message, serving as a minimal paid endpoint to validate x402 payment flow end-to-end.

## Facts

- Endpoint: GET https://bess-x402.onrender.com/v1/util/ping?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/paid-ping-x402-test-dacedbdf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aOElW3j09AJooh487EhOf

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 paid-ping-x402-test-dacedbdf
```

Example prompt: Ping the x402 test endpoint and echo back the message 'hello world' — I want to confirm my payment client and USDC wallet are wired up correctly before making real API calls.

## When to prefer this

Choose this endpoint when you need the lowest-cost, lowest-risk way to verify that an x402 payment client, wallet, and facilitator are all wired up correctly — before committing to more expensive paid API calls. It is purpose-built as a diagnostic tool for x402 integration testing, not as a production data endpoint.

## Known failure modes

- Payment rejected if wallet has insufficient USDC balance
- 402 Payment Required returned if x402 client is not configured
- 400 Bad Request if an invalid query parameter type is sent
- Timeout or 503 if the Render.com host is cold-starting
- Empty echo field if no message query parameter was provided

## How this service works

The smallest paid call: returns the server's UTC time and echoes your message. Use to test an x402 client, wallet and payment flow end to end before calling bigger tools.

## Output

Returns a JSON object containing the server's current UTC timestamp and the echoed message string (if provided), confirming that the x402 payment was accepted and the endpoint was reached successfully.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "message": {
       "type": "string",
       "description": "Text to echo back"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/paid-ping-x402-test-dacedbdf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from bess-x402.onrender.com](https://www.zero.xyz/host/bess-x402.onrender.com/llms.txt)