# Data Vending — x402 Endpoint Radar Probe Dataset

> Data Vending — x402 Endpoint Radar Probe Dataset is a paid API for AI agents from data-vending.869biz.com, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-15).

Downloads a probe-tier sample of the x402 endpoint radar dataset containing up to 5 titled items with source counts, payable via USDC over x402 with no API key required.

## Facts

- Endpoint: GET https://data-vending.869biz.com/v1/datasets/tech.x402_endpoint_radar.probe.v1/download
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/data-vending-x402-endpoint-radar-probe-dataset-0153bdb8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b48QDbotzi2zE2DM2U80v

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 data-vending-x402-endpoint-radar-probe-dataset-0153bdb8
```

Example prompt: Download the x402 endpoint radar probe dataset for me — pay with base-usdc using the quote I already got.

## When to prefer this

Use this endpoint when an AI agent needs a lightweight, no-signup sample of x402 endpoint radar data and can pay $0.008 USDC via x402 micropayment on Solana or Base. Prefer this over full-tier downloads when you want a quick probe (up to 5 items) to evaluate dataset quality before committing to a larger purchase.

## Known failure modes

- Invalid or expired quote_id returns a payment error or 402 re-challenge
- Unsupported rail_id value causes a bad request error
- Payment not confirmed on-chain results in access denial
- Dataset temporarily unavailable returns a 503 or empty items array
- Stale quote used after expiry returns payment rejection

## How this service works

HTTP-native dataset vending for autonomous AI agents. No signup, no API key — discover, pay USDC via x402, get clean JSON. Human-designed data with provenance and conservation revenue share.

## Output

A JSON object containing the dataset SKU ('tech.x402_endpoint_radar.probe.v1'), tier ('probe'), up to 5 dataset items each with a title and source_count, an as_of_date, item_limit, and an optional upgrade_to pointer for higher tiers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "rail_id": {
   "type": "string",
   "description": "Payment rail: solana-usdc or base-usdc"
  },
  "quote_id": {
   "type": "string",
   "description": "Quote id from GET .../quote"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "tech.x402_endpoint_radar.probe.v1",
  "tier": "probe",
  "items": [
   {
    "title": "string",
    "source_count": 1
   }
  ],
  "as_of_date": "2026-06-06",
  "item_limit": 5,
  "upgrade_to": null
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/data-vending-x402-endpoint-radar-probe-dataset-0153bdb8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data-vending.869biz.com](https://www.zero.xyz/host/data-vending.869biz.com/llms.txt)