# Keyword Autocomplete & Search Suggest API

> Keyword Autocomplete & Search Suggest API is a paid API for AI agents from x402-deployer.x402-deployer.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Aggregates and de-duplicates keyword autocomplete suggestions from Wikipedia OpenSearch and DuckDuckGo into a ranked list for SEO research and query expansion.

## Facts

- Endpoint: POST https://x402-deployer.x402-deployer.workers.dev/keyword-suggest
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/keyword-autocomplete-search-suggest-api-6f96af69
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9qTRypD12TzpCpV-PVH7Z

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 keyword-autocomplete-search-suggest-api-6f96af69 -d '<json body>'
```

Example prompt: Can you get me autocomplete keyword suggestions for 'electric vehicle charging' — I want a de-duplicated ranked list pulling from both Wikipedia and DuckDuckGo so I can find content gaps?

## When to prefer this

Choose this endpoint when you need free-tier autocomplete signals from Wikipedia and DuckDuckGo combined — ideal for SEO content gap analysis, LLM query expansion, or keyword brainstorming without needing a Google Ads or paid SEO API key. Best for agents that need broad, organic search-suggest data quickly at low cost.

## Known failure modes

- Empty or very short seed keyword returns few or no suggestions
- Highly niche or misspelled queries may return sparse results from upstream sources
- Upstream Wikipedia or DuckDuckGo services temporarily unavailable causing partial or failed response
- Rate limiting or payment failure (x402) blocks the request

## How this service works

Keyword autocomplete / search suggest / SEO keyword research / query expansion / autocomplete suggestions. Aggregates suggestions from Wikipedia OpenSearch + DuckDuckGo's autocomplete (both public, no auth) into a de-duplicated ranked list. Useful for SEO content-gap analysis, LLM query expansion, agent-driven research.

## Output

A de-duplicated, ranked list of autocomplete keyword suggestions aggregated from Wikipedia OpenSearch and DuckDuckGo's autocomplete endpoints, covering related terms and query expansions for the input seed keyword.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "anyOf": [
      {
       "required": [
        "query"
       ]
      },
      {
       "required": [
        "keyword"
       ]
      }
     ],
     "properties": {
      "lang": {
       "type": "string",
       "description": "Wikipedia language code, e.g. 'en', 'es'. Default 'en'."
      },
      "limit": {
       "type": "number",
       "description": "1-50. Default 10."
      },
      "query": {
       "type": "string",
       "description": "Seed query."
      },
      "source": {
       "enum": [
        "wikipedia",
        "duckduckgo",
        "all"
       ],
       "type": "string",
       "description": "Default 'all'."
      },
      "keyword": {
       "type": "string",
       "description": "Alias for query."
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "count": {
       "type": "integer"
      },
      "query": {
       "type": "string"
      },
      "per_source": {
       "type": "object",
       "properties": {
        "wikipedia": {
         "type": "object",
         "properties": {
          "count": {
           "type": "integer"
          }
         }
        },
        "duckduckgo": {
         "type": "object",
         "properties": {
          "count": {
           "type": "integer"
          }
         }
        }
       }
      },
      "attribution": {
       "type": "string"
      },
      "suggestions": {
       "type": "array",
       "items": {
        "type": "string"
       }
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/keyword-autocomplete-search-suggest-api-6f96af69/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-deployer.x402-deployer.workers.dev](https://www.zero.xyz/host/x402-deployer.x402-deployer.workers.dev/llms.txt)