# x402-gateway: Keyword Ideas (SEO)

> x402-gateway: Keyword Ideas (SEO) is a paid API for AI agents from x402.freeq.one, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-17).

Generates keyword ideas and search volume data from a seed keyword, priced per-call in USDC on Base via x402.

## Facts

- Endpoint: POST https://x402.freeq.one/tools/keyword_ideas?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-gateway-keyword-ideas-seo-12b0cd64
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cpTVJMqdC1cIkQ54JSFi_

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 x402-gateway-keyword-ideas-seo-12b0cd64 -d '<json body>'
```

Example prompt: Give me up to 50 keyword ideas based on the seed keyword 'running shoes' — I need English results for the United States with their search volumes.

## When to prefer this

Choose this endpoint when you need affordable, pay-per-call keyword idea generation with search volume data and no account or API key setup — particularly suitable for AI agents that need on-demand SEO research billed in USDC on Base. Prefer over subscription-based SEO APIs (Ahrefs, SEMrush) for low-frequency or agent-driven usage where per-call pricing is more cost-effective.

## Known failure modes

- Invalid or missing seed keyword returns an error
- Limit out of range (below 1 or above 100) may cause a validation error
- Unsupported language_code or location_code may return empty or error results
- Payment failure via x402 results in a 402 response and no data
- Network timeout on upstream SEO data source returns a 5xx error

## How this service works

Keyword Ideas: Generate keyword ideas from a seed keyword with volume data. Priced below typical SEO-data APIs. Pay per call in USDC on Base via x402 — POST https://x402.freeq.one/tools/keyword_ideas.

## Output

Returns a JSON object containing a list of keyword ideas derived from the seed keyword, each with associated search volume data and related metrics, up to the specified limit.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer",
   "description": "Max ideas to return, 1-100 (default 25)"
  },
  "keyword": {
   "type": "string",
   "example": "running shoes",
   "description": "Seed keyword"
  },
  "language_code": {
   "type": "string",
   "description": "Language code (default 'en')"
  },
  "location_code": {
   "type": "integer",
   "description": "Google location code (default 2840 = United States)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-gateway-keyword-ideas-seo-12b0cd64/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.freeq.one](https://www.zero.xyz/host/x402.freeq.one/llms.txt)