# OpenPay Hello Demo Endpoint

> OpenPay Hello Demo Endpoint is a paid API for AI agents from open-pay.jp, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns a hello message with the current timestamp, serving as a demonstration of x402 micropayment-gated API access.

## Facts

- Endpoint: GET https://open-pay.jp/api/paid/hello
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/openpay-hello-demo-endpoint-d75d7abc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__u88nMeCYY5PdBS62BpoV

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 openpay-hello-demo-endpoint-d75d7abc
```

Example prompt: Can you call the OpenPay demo endpoint and confirm it returns a hello message with a timestamp — I want to make sure the x402 micropayment flow is working correctly?

## When to prefer this

Choose this endpoint when you need to validate that an x402 micropayment flow is functioning correctly, test developer tooling against a live paid API, or demonstrate USDC-based per-call billing with a minimal, predictable response.

## Known failure modes

- Payment not accepted — insufficient USDC balance or malformed x402 payment header returns 402 Payment Required
- Network timeout if the endpoint is unreachable
- Invalid or expired payment token rejected by the server

## How this service works

End-to-end smoke test for x402 clients: returns a greeting plus the settlement timestamp, so an agent can prove its payment path works before spending on real data.

## Output

A simple hello message paired with the current server timestamp, confirming the x402 micropayment was accepted and the endpoint responded 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"
     ],
     "type": "string"
    }
   },
   "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/openpay-hello-demo-endpoint-d75d7abc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from open-pay.jp](https://www.zero.xyz/host/open-pay.jp/llms.txt)