# Market Pricing Change Radar — Micro Tier (x402 Pay-Per-Call Dataset)

> Market Pricing Change Radar — Micro Tier (x402 Pay-Per-Call Dataset) is a paid API for AI agents from data-vending.869biz.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Downloads a micro-tier dataset of market pricing change signals, returning a capped list of items with source counts and provenance, paid per-call via USDC over x402.

## Facts

- Endpoint: GET https://data-vending.869biz.com/v1/datasets/market.pricing_change_radar.micro.v1/download
- Price: $0.003/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-micro-tier-x402-pay-per-call-dataset-22c82427
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9fSP_La_j7nsAK0gT3LYy

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-micro-tier-x402-pay-per-call-dataset-22c82427
```

Example prompt: Fetch the market pricing change radar micro dataset for me — pay using base-usdc with the quote ID I got from the quote endpoint, and show me the latest pricing change signals and their source counts.

## When to prefer this

Use this endpoint when an AI agent needs a small, immediately consumable sample of market pricing change signals without any account setup, and is willing to pay $0.003 USDC per call via x402. Ideal for autonomous agents doing exploratory market monitoring or testing data quality before upgrading to a larger tier.

## Known failure modes

- Missing or invalid quote_id returns 402 or 400 error
- Invalid rail_id value (not solana-usdc or base-usdc) causes payment failure
- Expired quote ID from the /quote endpoint leads to payment rejection
- Insufficient USDC balance on the specified payment rail
- Network or blockchain confirmation delay causing timeout
- Dataset temporarily unavailable returns 503

## 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, tier name, a capped list of pricing change radar items (each with a title and source count), the as-of date, the item limit for this tier, and a suggestion for upgrading to a higher-tier SKU for more data.

## 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.micro.v1",
  "tier": "micro",
  "items": [
   {
    "title": "string",
    "source_count": 1
   }
  ],
  "as_of_date": "2026-06-06",
  "item_limit": 2,
  "upgrade_to": "market.pricing_change_radar.probe.v1"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market-pricing-change-radar-micro-tier-x402-pay-per-call-dataset-22c82427/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)