# Optix402 Market Size by Category

> Optix402 Market Size by Category is a paid API for AI agents from optinx402.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Returns real-time total volume and market size analytics for a specified category within the x402 payment ecosystem

## Facts

- Endpoint: GET https://optinx402.vercel.app/api/market-size/%7Bcategory%7D
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/optix402-market-size-by-category-c5618870
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NgfA4KP-mFk5hg9yriQX4

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 optix402-market-size-by-category-c5618870
```

Example prompt: What's the current market size and total volume for the 'analytics' category in the x402 ecosystem?

## When to prefer this

Use this endpoint when you need to understand the scale and transaction volume of a specific category within the x402 micropayment ecosystem, particularly when building market analysis, competitive benchmarking, or investment research tools focused on x402-enabled API commerce.

## Known failure modes

- Unknown or unsupported category returns empty or null data
- Category path parameter not URL-encoded correctly causes 404
- Stale or unavailable data source returns incomplete metrics
- Rate limiting or payment failure (x402 protocol) prevents access
- Malformed category string returns validation error

## How this service works

Real-time analytics for the x402 ecosystem. 30 endpoints covering market intelligence, buyer analytics, competitive analysis, revenue tracking, and ecosystem health.

## Output

A JSON object containing total_volume and associated market size metrics for the requested x402 category, reflecting real-time transaction data across the ecosystem.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "total_volume": 10000
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/optix402-market-size-by-category-c5618870/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from optinx402.vercel.app](https://www.zero.xyz/host/optinx402.vercel.app/llms.txt)