# market2000.xyz x402 Supply Census – Competitor Discovery Index

> market2000.xyz x402 Supply Census – Competitor Discovery Index is a paid API for AI agents from market2000.xyz, paid per call via x402, $5/call, status unknown (last checked 2026-09-15).

Returns a normalized catalog of live x402 API endpoints by category, with per-category price percentiles and data on which AI agent crawlers are actively indexing each origin.

## Facts

- Endpoint: GET https://market2000.xyz/api/demand/competitors
- Price: $5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/market2000-xyz-x402-supply-census-competitor-discovery-index-ba85e085
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rpK0-LxLLRKqlh9BJjBQt

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 market2000-xyz-x402-supply-census-competitor-discovery-index-ba85e085
```

Example prompt: Show me the price distribution for live x402 trading-signal endpoints — I want to see the median, p25, and p75, plus which AI agent crawlers have been hitting those origins in the last 7 days. Give me the top 40 results.

## When to prefer this

Choose this endpoint when you need to benchmark your x402 API pricing against real market data, understand which AI agent crawlers are active in a category, or build a competitive map of live endpoints in the x402 ecosystem. It is especially valuable pre-launch for pricing strategy and post-launch for distribution auditing. Prefer it over generic API directories when you specifically need x402-native supply data with price percentiles and crawler coverage.

## Known failure modes

- Invalid category value returns empty or error response
- limit out of range (below 1 or above 100) may return default or error
- Payment not included or insufficient results in 402 Payment Required
- No data available for a niche category returns empty catalog arrays
- Stale data if the index has not refreshed recently

## How this service works

x402 supply census — who is live, in what category, at what price.

The full public discovery index (~14.8k resources) normalised into per-category price percentiles and per-origin catalogues, so you can price against the median instead of the loudest listing. Crossed with the half that is not public: which agent client stacks actually crawl a live origin, and therefore which ones will find your endpoint once you ship it.

HOW TO CALL:
  GET /api/demand/competitors?category=market-data&limit=40

PARAMETERS:
  category — optional filter (market-data, crypto-onchain, trading-signal, ai-inference, media-gen, web-search, enrichment, social, messaging, storage, other)
  limit    — origins returned, 1-100 (default 40)

RESPONSE: catalog.by_category[] price min/p25/median/p75/max, catalog.top_origins[], and ecosystems_crawling[] observed over 7 days.

PRICING: $0.05 per call.

## Output

Returns a JSON object containing: catalog.by_category[] with price statistics (min, p25, median, p75, max) for the requested category; catalog.top_origins[] listing the leading endpoints; and ecosystems_crawling[] identifying which AI agent client stacks have been observed crawling those origins over the past 7 days.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "queryParams"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/market2000-xyz-x402-supply-census-competitor-discovery-index-ba85e085/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market2000.xyz](https://www.zero.xyz/host/market2000.xyz/llms.txt)