# Semrush, contact us, Advanced, 2,000,000 API units, GET /, Phrase questions: Related keywords API

> The report lists phrase questions relevant to a queried term in a chosen database.

Semrush's related keywords API on its "Advanced, 2,000,000 API units" plan. It returns 5 of the 6 key fields we check: Search volume, Cost per click, Competition, Keyword difficulty, Search intent.
We haven't run Semrush through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
Semrush gives this plan's price on request. We rank 143 plans for related keywords APIs by price. Half the plans cost $0.486 per 1,000 keywords or less.
[XMLRiver's ₽15,000 monthly plan](https://datacircle.dev/related-keywords-apis/xmlriver/15000-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords: $0.00009. XMLRiver charges for each page of results. We count 2,000 keywords on each page to get the $0.00009 price.
[Mangools](https://datacircle.dev/related-keywords-apis/mangools/15-monthly/llms.txt), [DataForSEO](https://datacircle.dev/related-keywords-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt) and [AnyAPI](https://datacircle.dev/related-keywords-apis/anyapi/top-up-from-10-manual-top-up-post-v1-run-seo-related-keywords/llms.txt) are the best related keywords API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-2000000-api-units-get-phrase-questions
- [Related keywords API: 4 providers compared on price and data](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://www.semrush.com/pricing/seo?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `GET https://api.semrush.com/`, Phrase questions
- API key: with the plan, on https://www.semrush.com/pricing/seo?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Its API docs: https://developer.semrush.com/api/v3/seo/keyword-reports/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing#phrase-questions
- Sold by: Semrush (https://www.semrush.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-01

## In the answer

- Completeness: 83%
- Search volume: ✓
- Cost per click: ✓
- Competition: ✓
- Keyword difficulty: ✓
- Search intent: ✓

## Price

- Per: result
- Billing: contact

## Charges

- Also pays for: from the same budget: Domain Organic Search Keywords · Keyword Overview (one database) · Batch Keyword Overview (one database) · Get Keyword Metrics · Related Keywords · Broad Match Keyword · Backlinks (v4) · Backlinks (v3) · Backlinks overview (v4) · Backlinks overview (v3)

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: The report lists phrase questions relevant to a queried term in a chosen database.

## Data

- Keep data: not to cache the information received from the Services for more than one (1) month without the express written consent of Semrush
- Use data: You may also access and use the Semrush API solely for your internal business purposes in accordance with the terms of this Agreement and the limitations of your Subscription Plan. [...] Restrictions. You may not, directly or indirectly, (a) sublicense, resell, rent, lease, transfer, assign, time share or otherwise commercially exploit or make the Services or any portion thereof available to any third party, (b) use the Services for any purpose or in any manner that is unlawful (including without limitation in violation of any data, privacy, anti-bribery or export control laws) or is prohibited by this Agreement, (c) permit any person or entity who is not an Authorized User to use or access any Services, (d) read or attempt to read or derive the source code of the Services or the software underlying the Services (except as permitted by law), (e) work around any technical limitations in the Services, (f) interfere or attempt to interfere with or disrupt the integrity, security, functionality or performance of the Services or its components, (g) load or penetration test the Services, or use the Services in any manner that is, or could reasonably be expected to be, detrimental to our ability to provide Services to any other customer or in any manner that interferes with any other party’s use of the Services, (h) modify, translate, adapt, create, or attempt to create any derivative works of the Services, (i) access the Services if you are a competitor of ours or use the Services to build a similar or competitive work, (j) hack or otherwise attempt to gain unauthorized access to the Services or its related systems or networks, (k) use or launch any automated system, including, “robots,” “spiders,” or “offline readers,” that sends more request messages to our servers in a given period of time than a human can reasonably produce in the same period by using a conventional browser, (l) frame or mirror any content forming part of the Services, (m) knowingly take any action that would cause any portion of the Services to be placed in the public domain, (n) remove, alter, or obscure any proprietary notices of Semrush, its licensors, or its suppliers included in the Services, (o) use the Services to create, send, or store infringing, obscene, threatening, libelous, or otherwise unlawful or tortious material, including material that is harmful to children, and including spam, unsolicited commercial, or other harmful emails, or otherwise harass, threaten, demean, embarrass, bully, or harm any individual, (p) harvest or scrape any content of the Services or any related system or service, (q) perform any fraudulent activity including impersonating any person or entity, claiming a false affiliation or identity, or accessing any other Account without permission, or (r) use, access, copy, or process any Semrush intellectual property (including insights, analyses, suggestions, graphs and other outputs from the Services, including generative AI outputs) or Semrush Confidential Information as inputs/prompts into, or for the purposes of developing, training, improving, fine-tuning, testing, or otherwise enhancing, any artificial intelligence, machine learning, or similar technologies (including but not limited to large language models, generative AI systems, predictive analytics, or algorithmic models), including by means of combining or commingling the foregoing with other datasets for such purpose (except for Semrush’s official integrations embedded into an AI system). You also agree to comply with the Semrush Content Policy, located at https://www.semrush.com/company/legal/content-policy/ (the “Content Policy”) and other policies that apply to your use of the Services that you are notified of from time to time. You will promptly notify Semrush if you learn of any breach of the restrictions in this section. If you subscribe to the Semrush API, in addition to the restrictions set forth above, you agree (i) not to forward more than ten (10) inquiries per one (1) second from one unique IP address or more than ten (10) simultaneous inquiries from one (1) Authorized User, and (ii) not to cache the information received from the Services for more than one (1) month without the express written consent of Semrush.

## Plan

- You get: 2,000,000 credits
- Enough for: 50,000 results
- Expires: at renewal

## Rate limit

- Per second: 10
- Concurrent: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: type "phrase_questions", phrase, database. Optional: display_limit, display_offset, export_columns, display_sort, display_filter
- Method: GET
- Path: /

## About the plan

- Plan: Advanced, 2,000,000 API units
- Who can get it: anyone on the Advanced SEO plan, which is bought by requesting a demo

## The 8 fields the plan's answer can hold

keyword, search volume, cost per click, competition, search results count, search trend, intents, keyword difficulty

## Semrush's plans (4)

- [Semrush, contact us, Advanced, 2,000,000 API units, GET /, Phrase questions](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-2000000-api-units-get-phrase-questions/llms.txt): 83% complete
- [Semrush, contact us, Advanced, 5,000,000 API units, GET /, Phrase questions](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-5000000-api-units-get-phrase-questions/llms.txt): 83% complete
- [Semrush, contact us, Advanced, 10,000,000 API units, GET /, Phrase questions](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-10000000-api-units-get-phrase-questions/llms.txt): 83% complete
- [Semrush, contact us, Advanced, 20,000,000 API units, GET /, Phrase questions](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-20000000-api-units-get-phrase-questions/llms.txt): 83% complete

## Semrush's calls for this API (3)

- `GET /`, Broad Match Keyword: [Semrush, contact us, Advanced, 2,000,000 API units, GET /, Broad Match Keyword](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-2000000-api-units-get-broad-match-keyword/llms.txt)
- `GET /`, Phrase questions: [Semrush, contact us, Advanced, 2,000,000 API units, GET /, Phrase questions](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-2000000-api-units-get-phrase-questions/llms.txt)
- `GET /`, Related Keywords: [Semrush, contact us, Advanced, 2,000,000 API units, GET /, Related Keywords](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-2000000-api-units-get-related-keywords/llms.txt)

## Semrush's APIs (5)

- [Semrush: ranked keywords API pricing, 4 plans](https://datacircle.dev/ranked-keywords-apis/semrush/contact-us-advanced-2000000-api-units/llms.txt)
- [Semrush: domain authority API pricing, 4 plans, GET /analytics/v1/](https://datacircle.dev/domain-authority-apis/semrush/contact-us-advanced-2000000-api-units-get-analytics-v1/llms.txt)
- [Semrush: domain authority API pricing, 4 plans, GET /apis/v4/backlinks/v1/overview](https://datacircle.dev/domain-authority-apis/semrush/contact-us-advanced-2000000-api-units-get-apis-v4-backlinks-v1-overview/llms.txt)
- [Semrush: backlink API pricing, 4 plans, GET /analytics/v1/](https://datacircle.dev/backlink-apis/semrush/contact-us-advanced-2000000-api-units-get-analytics-v1/llms.txt)
- [Semrush: backlink API pricing, 4 plans, GET /apis/v4/backlinks/v1/links](https://datacircle.dev/backlink-apis/semrush/contact-us-advanced-2000000-api-units-get-apis-v4-backlinks-v1-links/llms.txt)
- [Semrush: keyword research API pricing, 4 plans, GET /, Batch Keyword Overview (one database)](https://datacircle.dev/keyword-research-apis/semrush/contact-us-advanced-2000000-api-units-get-batch-keyword-overview-one-database/llms.txt)
- [Semrush: keyword research API pricing, 4 plans, GET /apis/v4/keywords/v1/metrics](https://datacircle.dev/keyword-research-apis/semrush/contact-us-advanced-2000000-api-units-get-apis-v4-keywords-v1-metrics/llms.txt)
- [Semrush: keyword research API pricing, 4 plans, GET /, Keyword Overview (one database)](https://datacircle.dev/keyword-research-apis/semrush/contact-us-advanced-2000000-api-units-get-keyword-overview-one-database/llms.txt)
- [Semrush: related keywords API pricing, 4 plans, GET /, Phrase questions](https://datacircle.dev/related-keywords-apis/semrush/contact-us-advanced-2000000-api-units-get-phrase-questions/llms.txt)

## Semrush: related keywords API alternatives

- [DataForSEO, contact us, Custom pricing quote, POST /v3/dataforseo_labs/google/keyword_ideas/live](https://datacircle.dev/related-keywords-apis/dataforseo/contact-us-custom-pricing-quote-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt): 100% complete, 1 month
- [SE Ranking, contact us, Enterprise, GET /v1/keywords/questions](https://datacircle.dev/related-keywords-apis/se-ranking/contact-us-enterprise-get-v1-keywords-questions/llms.txt): 100% complete, 1 month
- [Ranxplorer, contact us, Sur mesure, GET /v1/kwd/relatedsearches](https://datacircle.dev/related-keywords-apis/ranxplorer/contact-us-sur-mesure-get-v1-kwd-relatedsearches/llms.txt): 83% complete
- [SandBase, contact us, Scale, POST /v1/api/dataforseo/v3/dataforseo_labs/google/related_keywords/live](https://datacircle.dev/related-keywords-apis/sandbase/contact-us-scale-post-v1-api-dataforseo-v3-dataforseo-labs-google-related-keywords-live/llms.txt): 83% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-01.

- https://developer.semrush.com/api/v3/seo/keyword-reports/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://developer.semrush.com/api/v4/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://developer.semrush.com/api/v4/get-started/api-units-balance/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://developer.semrush.com/api/v4/introduction/api-usage-restrictions/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.semrush.com/company/legal/terms-of-service/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.semrush.com/kb/5-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.semrush.com/pricing/seo?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing