# SpyFu Question Keywords API

> SpyFu Question Keywords API is a paid API for AI agents from spyfu.x402.paysponge.com, paid per call via x402, $0.010000/call, status down (last checked 2026-09-15).

Returns question-based keyword suggestions related to a given topic or keyword using SpyFu's keyword intelligence data

## Facts

- Endpoint: GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getQuestionKeywords
- Price: $0.010000/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spyfu-0cc12d19
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x9_FOtGdkIoVrtkiEzY82

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 spyfu-0cc12d19
```

Example prompt: What question-based keywords do people search for around 'home solar panels'? I want to find SEO content ideas based on real search questions people ask.

## When to prefer this

Use this endpoint when you need question-format keyword ideas (who, what, how, why, when) for SEO content planning, FAQ pages, or featured snippet optimization. Prefer this over general keyword tools when you specifically need interrogative phrasing variants of a seed keyword.

## Known failure modes

- Missing required query parameter returns an error or empty result
- Invalid or unsupported keyword format may return empty keyword list
- Rate limiting or payment failure returns 402 Payment Required
- SpyFu data unavailable for very niche or obscure topics returns empty list

## How this service works

GET /apis/keyword_api/v2/related/getQuestionKeywords

## Output

A list of question-based keyword suggestions (e.g. 'how to install solar panels', 'what is the cost of solar panels') related to the input topic, sourced from SpyFu's keyword database, useful for content strategy and featured snippet targeting.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "additionalProperties": true
    }
   },
   "additionalProperties": false
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/spyfu-0cc12d19/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from spyfu.x402.paysponge.com](https://www.zero.xyz/host/spyfu.x402.paysponge.com/llms.txt)