# SpyFu PPC Get Most Successful Keywords

> SpyFu PPC Get Most Successful Keywords 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 the most successful pay-per-click (PPC) keywords for a domain based on SpyFu data

## Facts

- Endpoint: GET https://spyfu.x402.paysponge.com/apis/keyword_api/v2/ppc/getMostSuccessful
- 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-3c6ec9fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2GOjKJZD_p1FhrWVrAZfh

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-3c6ec9fb
```

Example prompt: What are the most successful PPC keywords that nike.com is currently bidding on according to SpyFu — show me which paid search keywords are performing best for them?

## When to prefer this

Use this endpoint when you need to identify which paid search keywords are performing best for a specific domain — ideal for competitive PPC research, finding proven high-ROI keywords a competitor is betting on, or benchmarking your own paid search strategy against industry players. Prefer this over SEO keyword endpoints when the focus is specifically on paid/Google Ads traffic rather than organic rankings.

## Known failure modes

- Missing or invalid domain parameter returns 400 error
- Domain not found in SpyFu database returns empty results
- Payment not processed via x402 returns 402 Payment Required
- Rate limit exceeded returns 429 error
- Malformed query parameters return 422 validation error

## How this service works

GET /apis/keyword_api/v2/ppc/getMostSuccessful

## Output

Returns a list of the most successful PPC keywords for the specified domain, likely including keyword text, estimated ad spend, click volume, CPC, and performance metrics indicating which paid search terms have historically driven the most value.

## 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-3c6ec9fb/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)