# x402 Demand Gap Lens

> x402 Demand Gap Lens is a paid API for AI agents from x402-demand-gaps.website-findings.workers.dev, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).

Identifies high-opportunity x402 API niches by analyzing repeat-buyer demand, supplier scarcity, and Base blockchain payment evidence over a 30-day window.

## Facts

- Endpoint: GET https://x402-demand-gaps.website-findings.workers.dev/api/x402-market/demand-gaps?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-demand-gap-lens-31051ba8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xhdxgtFkwqFqM_c_ZH311

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-demand-gap-lens-31051ba8
```

Example prompt: Show me the x402 demand gaps from the last 30 days — I want to know which API niches have strong repeat-buyer demand but not enough suppliers, backed by real Base payment evidence, so I can decide what to build next.

## When to prefer this

Choose this endpoint when you need data-driven x402 API opportunity identification backed by real on-chain payment evidence on Base, rather than generic market research or keyword trends. It is purpose-built for developers and product teams deciding which x402 micro-API niche to build into, combining demand-side (repeat buyer) and supply-side (scarcity) signals in a single call. Prefer it over generic API analytics when you specifically want to identify gaps in the x402 pay-per-call ecosystem.

## Known failure modes

- Only the '30d' window value is supported; any other window value will likely return an error or be rejected
- Response schema is loosely typed (object), so field names and structure may vary or be sparse
- Upstream demand/payment data may be stale if the snapshot hasn't refreshed recently
- Endpoint may return empty or minimal gap data if the x402 ecosystem activity is low in the period

## How this service works

Choose which x402 API to build using screened repeat-buyer demand, supplier scarcity, and Base payment evidence.

## Output

Returns a structured market intelligence report covering high-demand, low-supply x402 API categories over the last 30 days, including signals derived from repeat-buyer transaction patterns, supplier count and scarcity metrics, and Base blockchain payment evidence to validate real purchasing intent.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "window": {
   "enum": [
    "30d"
   ],
   "type": "string",
   "description": "The first snapshot supports only the 30-day view."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-demand-gap-lens-31051ba8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-demand-gaps.website-findings.workers.dev](https://www.zero.xyz/host/x402-demand-gaps.website-findings.workers.dev/llms.txt)