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Related Keywords Discovery API: AI Large Language Models

Discover semantically related keywords, difficulty, and volume from a seed term. Try free — pay per generation, no subscription.

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Overview

About this model

Related Keywords mines a deep keyword graph to uncover terms that are semantically related to a single seed keyword, rather than just lexical variations of it. A configurable depth parameter (1-4) controls how many hops the search tree expands, so shallow requests return close synonyms while deeper requests surface adjacent topics a searcher might explore next. Each result includes search volume and keyword difficulty, which makes this endpoint useful for building topic clusters and finding long-tail content angles competitors haven't covered yet.

1Topic clustering: Build a semantic map of related terms around a pillar keyword for content hubs.
2Content gap analysis: Surface adjacent topics with volume that your existing content doesn't cover.
3Long-tail discovery: Find lower-difficulty related terms that are easier to rank for than the seed keyword.
4Editorial calendar planning: Generate a ranked list of related article ideas from a single core topic.
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Pricing & Value

Cost analysis

muapiappFrom $0.01 per query

Multi-level related-keyword discovery with volume and difficulty metrics.

Fal.aiNot available

Not offered as a standalone API.

ReplicateNot available

Not offered as a standalone API.

** Competitor pricing is estimated based on similar model architectures and usage tiers.

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Technical Details

Configuration schema

Keywordstring

Seed keyword to discover related keywords for.

Default Valueai video generator
LocationEnum (213 options)

Country to target for the search.

Default ValueUnited States
LanguageEnum (129 options)

Language to search in.

Default ValueEnglish
Depthinteger

Search depth level (1-4).

Default Value2
Limitinteger

Max number of related keywords to return.

Default Value10
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Implementation Guide

Developer documentation

  1. Provide a seed keyword: Set keyword to the topic you want to expand around.
  2. Choose a depth: Set depth from 1 (close matches) to 4 (broad topical expansion).
  3. Set market targeting and limit: Use location, language, and limit to control scope and result count.
  4. Read the response: Each related keyword includes search volume and a keyword difficulty score.
curl -X POST https://api.muapi.ai/api/v1/seo-related-keywords \
  -H "x-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "keyword": "ai video generator",
    "depth": 2,
    "limit": 20
  }'
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Common Questions

Frequently asked

What does the depth parameter control?

Depth (1-4) sets how many hops the semantic search tree expands from the seed keyword — higher depth returns more topically distant but still related terms.

How many related keywords are returned?

Configurable via `limit`, capped by how many related terms exist for the seed keyword and chosen depth.

Does this include search volume?

Yes, every related keyword returns its own monthly search volume alongside a difficulty score.

How is Related Keywords different from Keywords for Keywords?

Related Keywords surfaces semantically related terms from a keyword graph, while Keywords for Keywords returns Google Ads' own bid-recommendation expansions — the two sources can return different, complementary lists.

Can I target a specific market?

Yes, set `location` and `language` to target a specific country and language for both discovery and volume.