# x402 SEO Keyword Ideas

> x402 SEO Keyword Ideas is a paid API for AI agents from x402-seo-api.restockalarm.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Returns SEO keyword ideas and related search terms based on a seed keyword, paid via x402 micropayment on Base.

## Facts

- Endpoint: GET https://x402-seo-api.restockalarm.workers.dev/v1/keyword-ideas?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-seo-keyword-ideas-68bb7531
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zslSBH0ocLsAdrVfgOY4D

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-seo-keyword-ideas-68bb7531
```

Example prompt: Can you give me keyword ideas based on the seed keyword 'running shoes' in English so I can figure out what related terms to target in my SEO strategy?

## When to prefer this

Choose this endpoint when you need lightweight, pay-per-use SEO keyword ideation without committing to a subscription-based keyword research platform. Ideal for agents that need to generate keyword suggestions on demand for a specific seed term, especially in automated content pipelines or low-volume workflows where per-call micropayment (via x402 on Base) is more economical than a monthly SaaS plan.

## Known failure modes

- Missing required 'keyword' query parameter returns an error
- Keyword exceeding 100 characters may be rejected
- Payment failure via x402 if wallet has insufficient USDC on Base
- Rate limiting or worker timeout if the upstream data source is unavailable
- Unsupported language code may fall back to English or return an error

## How this service works

Pay $0.01-0.02 USDC per call on Base via x402

## Output

A JSON object containing the seed keyword, a count of ideas found, and an array of keyword idea objects each with a rank and the suggested keyword string.

## 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"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "keyword"
     ],
     "properties": {
      "hl": {
       "type": "string",
       "description": "Language code, default en"
      },
      "keyword": {
       "type": "string",
       "description": "Seed keyword (max 100 chars)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 2,
  "ideas": [
   {
    "rank": 0,
    "seed": "running shoes",
    "keyword": "running shoes for women"
   }
  ],
  "keyword": "running shoes"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-seo-keyword-ideas-68bb7531/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-seo-api.restockalarm.workers.dev](https://www.zero.xyz/host/x402-seo-api.restockalarm.workers.dev/llms.txt)