# whatchuneed Shop Compare

> whatchuneed Shop Compare is a paid API for AI agents from whatchuneed.vercel.app, paid per call via x402, $0.2/call, status unknown (last checked 2026-10-24).

Compares products, services, or options across categories using natural language input via the whatchuneed API marketplace

## Facts

- Endpoint: POST https://whatchuneed.vercel.app/api/shop/compare?utm_source=zero.xyz
- Price: $0.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/whatchuneed-shop-compare-b10a823a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XHjYVfiigTZ5IY5QtmXWY

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 whatchuneed-shop-compare-b10a823a -d '<json body>'
```

Example prompt: Can you compare GPT-4o and Claude 3.5 Sonnet for my use case — I need the one that's better at coding tasks and has lower cost per token?

## When to prefer this

Choose this endpoint when you need a pay-per-call, single-API comparison across a wide range of domains (accommodation, LLM, crypto, finance, medical) without managing multiple API keys or subscriptions. Ideal for AI agents that need on-demand, ad-hoc comparisons with simple natural language input and crypto-native micropayment via x402 protocol.

## Known failure modes

- Vague or ambiguous input string may produce low-quality or generic comparisons
- Missing required 'input' field returns validation error
- Payment failure via x402 protocol results in 402 response before processing
- Backend service outage on Vercel may return 500 or timeout
- Comparison of obscure or niche items may return limited or no data

## How this service works

320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.

## Output

Returns a structured result object containing comparison data, rankings, or evaluations of the queried options, along with a status field indicating success or failure of the operation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "string",
   "description": "Request input"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "result": {
   "type": "object",
   "description": "Response data"
  },
  "status": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whatchuneed-shop-compare-b10a823a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whatchuneed.vercel.app](https://www.zero.xyz/host/whatchuneed.vercel.app/llms.txt)