# klymax402 Keyword Research API

> klymax402 Keyword Research API is a paid API for AI agents from klymax402.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).

Returns a list of related keywords and SEO research data for a given seed keyword or phrase

## Facts

- Endpoint: GET https://klymax402.com/api/keyword-research/api/keywords
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klymax402-keyword-research-api-4f2eff72
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yqFqp7XhibDjx2RGYRTyZ

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 klymax402-keyword-research-api-4f2eff72
```

Example prompt: Can you pull keyword research for 'bitcoin trading' and give me a list of related keywords I should be targeting for SEO?

## When to prefer this

Use this endpoint when an AI agent needs to programmatically generate keyword ideas or expand a seed term into related SEO or marketing keywords, especially in workflows where no external API key is available and pay-per-call via USDC on Base is acceptable. At $0.02/call it is cost-effective for on-demand keyword lookups in automated content or marketing pipelines.

## Known failure modes

- Missing required 'query' parameter returns an error or empty result
- Very obscure or misspelled seed keywords may return an empty keywords array
- Rate limiting or payment failure (x402) may prevent successful calls
- Generic or overly broad queries may return low-quality or irrelevant keyword sets

## How this service works

One MCP endpoint gives your AI agent access to 100 APIs -- crypto, DeFi, web, AI, finance and utilities. No API keys, USDC on Base from $0.003/call.

## Output

A JSON object containing the original query, a list of related keywords, a timestamp, and the total count of keywords returned. The keywords array contains SEO-relevant terms derived from the seed phrase.

## 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": [
      "query"
     ],
     "properties": {
      "query": {
       "type": "string",
       "description": "The seed keyword or phrase to research (e.g. 'bitcoin trading', 'best crm software')"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "query": "example",
  "keywords": [],
  "timestamp": "example",
  "totalKeywords": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klymax402-keyword-research-api-4f2eff72/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klymax402.com](https://www.zero.xyz/host/klymax402.com/llms.txt)