# SpyFu Transaction Keywords API

> SpyFu Transaction 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 transaction-intent keywords related to a query, identifying high-commercial-intent search terms via SpyFu's keyword database

## Facts

- Endpoint: GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/related/getTransactionKeywords
- 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-f8b284c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lCQVCxG0bn65gvlrNYOKb

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-f8b284c7
```

Example prompt: Can you pull the transaction-intent keywords related to 'project management software' from SpyFu — I want to find buyer-intent search terms I can target for paid ads?

## When to prefer this

Use this endpoint when you need to identify high-commercial-intent or buyer-ready keywords associated with a seed term — specifically for building PPC campaigns, conversion-focused landing pages, or identifying purchase-stage SEO targets. Prefer this over getRelatedKeywords when the goal is transactional intent rather than broad keyword expansion.

## Known failure modes

- Missing required query parameter returns 400 error
- Invalid or empty keyword input returns empty result set
- Rate limiting or quota exceeded returns 429 error
- Payment failure via x402 returns 402 response
- SpyFu upstream unavailability returns 503 error

## How this service works

GET /apis/keyword_api/v2/related/getTransactionKeywords

## Output

A list of transaction-intent keywords related to the queried term, typically including keyword text, search volume, cost-per-click estimates, and commercial intent signals sourced from SpyFu's database.

## 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-f8b284c7/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)