# SpyFu Keyword Information API (via Sponge/x402)

> SpyFu Keyword Information API (via Sponge/x402) is a paid API for AI agents from spyfu.x402.paysponge.com, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Retrieves detailed SEO and search data for a specific keyword, including search volume, cost-per-click, competition metrics, and related insights from SpyFu.

## Facts

- Endpoint: GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getKeywordInformation
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spyfu-fa9a9087
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rw5wRO_CTEiiLOkOCPJaD

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-fa9a9087
```

Example prompt: Pull the SpyFu keyword information for 'project management software' — I want to see the search volume, CPC, and competition metrics.

## When to prefer this

Choose this endpoint when you need comprehensive SEO and paid search metrics for a specific keyword from SpyFu's database, particularly when building keyword research workflows, comparing keyword competitiveness, or estimating advertising costs. Prefer over generic search APIs when SpyFu's historical and competitive intelligence data is specifically needed.

## Known failure modes

- Missing or invalid keyword parameter returns an error or empty result
- Rate limiting or payment failure (402) if USDC balance is insufficient
- Keyword not found in SpyFu database returns empty or null metrics
- Network timeout from upstream SpyFu API
- Malformed query parameters return a 400 error

## How this service works

GET /apis/keyword_api/v2/related/getKeywordInformation

## Output

Returns detailed keyword metrics from SpyFu including monthly search volume, cost-per-click (CPC), SEO difficulty, advertiser competition, related keyword data, and other SEO/SEM performance indicators for the queried keyword.

## 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-fa9a9087/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)