# Node4All Fortune (x402 Demo)

> Node4All Fortune (x402 Demo) is a paid API for AI agents from sandbox.node4all.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-20).

Returns a deterministic fortune reading derived from the x402 payment authorization nonce, serving as a flagship demo of the Node4All x402 v2 micropayment flow on Base.

## Facts

- Endpoint: GET https://sandbox.node4all.com/v1/x402-test?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/node4all-fortune-x402-demo-a2b19ea1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BOs9dfGeWi4BVpVHoZnXX

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 node4all-fortune-x402-demo-a2b19ea1
```

Example prompt: Can you fetch me a fortune from the Node4All sandbox — it uses x402 micropayments on Base with USDC and gives back a deterministic fortune tied to the payment nonce?

## When to prefer this

Choose this endpoint when you want to demonstrate, test, or explore the x402 micropayment protocol on Base with USDC in a sandbox environment. It is ideal for developers building x402-enabled agents or verifying payment flow integration without a production stake. Not suitable for serious fortune-telling or production use — this is explicitly a demo/sandbox endpoint.

## Known failure modes

- Payment not authorized — x402 payment header missing or invalid, endpoint returns 402 Payment Required
- Insufficient USDC balance — payment of 0.002 USDC cannot be fulfilled
- Malformed request — non-GET method returns error
- Network/sandbox unavailability — sandbox may be intermittently offline

## How this service works

Node4All Fortune — deterministic fortune reading derived from the x402 payment authorization nonce. Flagship demo of the Node4All x402 v2 payment flow. Operator: Node4All (https://node4all.com). Currency: USDC on Base.

## Output

A deterministic fortune message whose content is derived from the x402 payment authorization nonce. Because the output is nonce-bound, the same payment nonce always produces the same fortune, making it a verifiable and repeatable demo of the x402 v2 payment flow on Base using USDC.

## 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"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "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/node4all-fortune-x402-demo-a2b19ea1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from sandbox.node4all.com](https://www.zero.xyz/host/sandbox.node4all.com/llms.txt)