# Market Pricing Change Radar — Probe Dataset (x402)

> Market Pricing Change Radar — Probe Dataset (x402) 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 dataset of market pricing change signals, paid per-call via USDC using the x402 protocol, returning up to 5 curated items with provenance.

## Facts

- Endpoint: GET https://data-vending.869biz.com/v1/datasets/market.pricing_change_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/market-pricing-change-radar-probe-dataset-x402-b7a560e6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UYKNy45rq1qzdF2ElSkrF

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 market-pricing-change-radar-probe-dataset-x402-b7a560e6
```

Example prompt: Fetch me the latest market pricing change radar probe dataset — pay with Base USDC using the quote ID I got from the quote endpoint — and show me the top items with their source counts.

## When to prefer this

Use this endpoint when an AI agent needs a quick, no-signup probe sample of market pricing change signals and is capable of executing an x402 USDC micropayment. Ideal for agents that need human-curated, provenance-backed pricing intelligence at low cost ($0.008/call) without OAuth or API key setup. Choose this over traditional data APIs when operating autonomously with a crypto wallet on Solana or Base.

## Known failure modes

- Payment not completed or quote ID invalid — 402 Payment Required returned
- Expired quote ID — must re-fetch a fresh quote before downloading
- Unsupported rail_id value — must be 'solana-usdc' or 'base-usdc'
- Dataset temporarily unavailable — service outage or stale data
- Rate limit or abuse detection — request blocked

## 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 ('market.pricing_change_radar.probe.v1'), tier ('probe'), an as-of date, up to 5 pricing change radar items each with a title and source count, and an upgrade path field if a higher-tier dataset is available.

## 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": "market.pricing_change_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/market-pricing-change-radar-probe-dataset-x402-b7a560e6/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)