▣ MARKETING · SEO

Expand Related Keywords API

What it does

Keyword Expansion expands a single keyword into a list of related keywords. Send a keyword query parameter, and optionally set limit to control how many results you get back.

Use it when you need keyword ideas for SEO research, topic clustering, content planning, or ad group expansion. The response returns the original query and a results array of related keyword objects.

Each result includes the related keyword, a numeric score, and pair_count, so you can sort, filter, or rank suggestions in your own app. limit accepts values from 1 to 200, with a default of 25, which makes it easy to keep responses small during interactive workflows or request more candidates in batch jobs.

If you're building a content tool, search workflow, or campaign generator, Keyword Expansion gives you structured related-keyword data without having to scrape suggestion sources yourself.

GET

Expand a keyword into related keywords

https://api.eu.apyhub.com/dosvak/expand-keyword-into-related-keywords

QUICKSTART

GUIDE

Quickstart

Look up related keywords for a single search term, using the required keyword query parameter.

curl -X GET "https://api.eu.apyhub.com/dosvak/expand-keyword-into-related-keywords?keyword=marketing" \
  -H "apy-token: $APY_TOKEN"

What you'll get back

Returns a JSON object with a query string and a results array. Each item in results is an object with keyword as a string, score as a number, and pair_count as an integer.

{
  "query": "marketing",
  "results": [
    {
      "keyword": "digital marketing",
      "score": 0.92,
      "pair_count": 184
    }
  ]
}

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About this endpoint

What it does

Expands a single input keyword into a related-keywords result set. The endpoint takes a keyword query parameter, optionally limits the number of returned results with limit, and returns the original query string plus an array of related keyword objects.

Query Parameter(s)

Attribute	Type	Mandatory	Description
keyword	String	Yes	The keyword to expand. Must be at least 1 character long.
limit	Integer	No	Maximum number of related keywords to return. Default: 25. Minimum: 1. Maximum: 200.

Response

Returns a JSON object with a query string field and a results array field. Each item in results is an object containing keyword as a string, score as a number, and pair_count as an integer.

Parameter	Type	Mandatory	Description
query	String	Yes	The keyword query that was expanded.
results	Object Array	Yes	The related-keywords results. Each item includes `keyword`, `score`, and `pair_count`.
results[].keyword	String	Yes	A related keyword.
results[].score	Number	Yes	The score associated with the related keyword.
results[].pair_count	Integer	Yes	The pair count associated with the related keyword.

Query parameters

Name

Type

Description

limitOPTIONAL

integer

—

DEFAULT 25

keywordREQUIRED

string

—

▣ COMMON ERRORS

Errors any endpoint can return

400bad_request

Required parameter missing or malformed body.

401unauthorized

API key missing, revoked, or not authorized for this service.

429rate_limited

Your plan's per-second rate exceeded. Retry with exponential backoff.

503upstream_busy

Backend temporarily unavailable. Try again in a few seconds.

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From the blog

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