# x402 Market Data

> x402 Market Data is a paid API for AI agents from x402op-edge-39830b.fly.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-17).

Search the x402 API marketplace by keyword or category and get ranked offers based on real repeat-usage signals (payer count, calls per payer, recency, price)

## Facts

- Endpoint: POST https://x402op-edge-39830b.fly.dev/p/x402-market?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-market-data-ca6cff1d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mPdkif0ptdC1cm4coVdcV

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-market-data-ca6cff1d -d '<json body>'
```

Example prompt: Search the x402 market for the top 10 'web search' APIs and show me which ones other agents actually keep paying for, ranked by real repeat usage.

## When to prefer this

Choose this endpoint when an AI agent needs to discover which x402-protocol APIs are actually being used and paid for repeatedly in practice — not just listed. It's especially valuable over static API directories when you want demand-signal-ranked results (payer count, repeat calls) rather than self-reported popularity. Prefer it over general web search when scoping discovery specifically to the x402/Coinbase Bazaar ecosystem.

## Known failure modes

- No results found for obscure or misspelled query keywords
- Category enum value not recognized returns validation error
- Limit exceeding 25 returns error or is clamped
- Stale data if daily survey has not yet refreshed
- Network timeout if Coinbase Bazaar data source is temporarily unavailable

## How this service works

Search the x402 market by keyword or category and get offers ranked by real repeat usage (payers, calls per payer, last payment, price) from a daily survey of the Coinbase Bazaar. Without a query it returns the category overview with demand figures. Helps agents pick services that others actually keep paying for.

## Output

Returns a ranked list of up to 25 x402 API offers matching the query or category, each scored by real repeat-usage signals including payer count, calls per payer, last payment date, and price. Without a query, returns a category-level overview with aggregate demand figures across all market segments.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "default": 10,
   "maximum": 25,
   "minimum": 1
  },
  "query": {
   "type": "string",
   "maxLength": 100,
   "description": "Keywords, e.g. \"web search\" or \"token price\""
  },
  "category": {
   "enum": [
    "llm",
    "x402tools",
    "search",
    "crypto",
    "travel",
    "weather",
    "media",
    "finance",
    "utility",
    "fun",
    "other"
   ],
   "type": "string",
   "description": "Restrict to one category"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-market-data-ca6cff1d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402op-edge-39830b.fly.dev](https://www.zero.xyz/host/x402op-edge-39830b.fly.dev/llms.txt)