# x402 Category Demand & Unmet-Demand Finder

> x402 Category Demand & Unmet-Demand Finder is a paid API for AI agents from mcpfax-intel.bowling-anthony.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Identifies underserved categories in the x402 agent economy by comparing observed USDC spend against the number of active sellers per category, surfacing gaps where demand is high but supply is thin.

## Facts

- Endpoint: GET https://mcpfax-intel.bowling-anthony.workers.dev/category-demand
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-category-demand-unmet-demand-finder-8db87a9d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_OajWeJAGooX0JxkgJ4Te5

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-category-demand-unmet-demand-finder-8db87a9d
```

Example prompt: Show me which x402 service categories have the most unmet demand right now — high USDC spend but very few sellers — so I can decide what to build next.

## When to prefer this

Use this endpoint when you need to make a data-driven decision about which x402 service category to enter or build for, based on real USDC payment flows rather than speculation. It is uniquely suited for identifying supply-demand imbalances in the x402 ecosystem and outperforms generic market-research tools by grounding results in actual on-chain agent payment behavior. Prefer this over the seller leaderboard endpoint when your question is 'what to build' rather than 'who is winning'.

## Known failure modes

- Insufficient wallet scan coverage may suppress payer-quality scores for some categories
- No prior-window data means momentum signal is absent for newly observed categories
- Low overall x402 market activity may yield sparse results across categories
- Payment of $0.02 USDC via x402 required — missing or failed payment returns 402
- Category filter with no matching spend returns empty results

## How this service works

Where agents are spending and almost nobody is selling — demand against classified supply.

## Output

Returns a ranked list of x402 service categories with observed USDC spend, active seller count, an unmet-demand gap score, recent momentum signals (where prior-window data exists), and a payer-quality component (where wallet scan coverage supports it). Categories with high spend and low seller counts surface at the top as the clearest build opportunities.

## 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"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-category-demand-unmet-demand-finder-8db87a9d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mcpfax-intel.bowling-anthony.workers.dev](https://www.zero.xyz/host/mcpfax-intel.bowling-anthony.workers.dev/llms.txt)