# x402 Data API – Market Categories

> x402 Data API – Market Categories is a paid API for AI agents from data.kagurazaka.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-29).

Returns x402 API marketplace categories with listing counts, call volumes, median prices, and well-paid listing stats for each category.

## Facts

- Endpoint: GET https://data.kagurazaka.dev/v1/market/categories?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-data-api-market-categories-faf5943d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VXQffd1LvdHQBFhCtjY0F

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 x402-data-api-market-categories-faf5943d
```

Example prompt: Can you pull up a breakdown of all the x402 API marketplace categories — I want to see how many listings each one has, their call volumes, and the median prices?

## When to prefer this

Use this endpoint when you need a high-level categorical overview of the entire x402 API marketplace — e.g. to understand market structure, compare activity across domains, or identify which categories have the most listings and call volume. Prefer sibling endpoints for per-API rankings, price statistics for a specific capability, or seller/origin-level breakdowns.

## Known failure modes

- Empty or missing results if the market data index has not been populated
- HTTP 402 if the $0.002 USDC payment is not included in the request
- HTTP 500 if the backend data aggregation service is unavailable
- Stale data if the index has not been refreshed recently

## How this service works

Data about the x402 market: the CDP Bazaar's listings, sellers, prices and categories, new listings and price changes from snapshots every 6 hours, uptime we measure for every paid listing, and x402 spending of any wallet and revenue of any seller on Base.

## Output

A JSON array of category objects, each containing the category name (e.g. 'crypto & on-chain', 'LLM and AI'), total listings count, 30-day call count, median price in USD, and the count of listings with 5 or more distinct payers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "results": [
   {
    "category": "crypto & on-chain",
    "listings": 12000,
    "calls_30d": 500000,
    "median_price_usd": 0.003,
    "listings_with_5_or_more_payers": 900
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-data-api-market-categories-faf5943d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from data.kagurazaka.dev](https://www.zero.xyz/host/data.kagurazaka.dev/llms.txt)