# WordRadar, free: Related keywords API

> Rising queries with Breakout flags from our Trends capture pipeline, cached and queryable per keyword.

WordRadar's related keywords API on its Free plan. It costs $0.00 per 1,000 keywords. It returns none of the 6 key fields we check: Search volume, Monthly trend, Cost per click, Competition and 2 more.
We haven't run WordRadar through [our related keywords API benchmark](https://datacircle.dev/best-related-keywords-api.txt) yet.
This plan is free. We rank 169 plans for related keywords APIs by price. Half the plans cost $0.45 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.
[seodata.dev's $4.99 monthly plan](https://datacircle.dev/related-keywords-apis/seodata-dev/4-99-monthly/llms.txt) covers any number of keywords. seodata.dev's $4.99 monthly plan costs less up front than XMLRiver's ₽15,000 monthly plan.
[Bing Webmaster Tools](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/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 [Mangools](https://datacircle.dev/related-keywords-apis/mangools/15-monthly/llms.txt) are the best related keywords API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/related-keywords-apis/wordradar/free
- [Related keywords API: 6 providers compared on price and data](https://datacircle.dev/best-related-keywords-api.txt)
- Get it: https://www.wordradar.dev/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Request: `GET https://www.wordradar.dev/api/v1/trends/{keyword}`
- API key: with the plan, on https://www.wordradar.dev/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Its API docs: https://www.wordradar.dev/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- Sold by: WordRadar (https://www.wordradar.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 0%

## Price

- $ per 1,000 keywords: $0.00
- Per: page, size not stated
- Billing: free

## Charges

- Also pays for: from the same budget: Ledger words · Ledger verdicts · KD SERP · Latest sites · Domain timeline · Stripe leaderboard · Stripe domain

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Rising queries with Breakout flags from our Trends capture pipeline, cached and queryable per keyword.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: You may use API output inside your own products and analyses, you may not resell the raw feeds (see Acceptable Use). [...] You agree not to: Resell, redistribute, or bulk-mirror raw API output as a competing data feed, Circumvent rate limits or metering, or share one key across multiple organizations, Use the Service for unlawful purposes or to infringe others' rights

## Plan

- Pay: $0
- You get: 50 credits
- Enough for: 25 pages

## Rate limit

- Per second: 2
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: keyword
- Method: GET
- Path: /api/v1/trends/{keyword}

## About the plan

- Plan: Free
- Who can get it: anyone with an invite code: sign-up is invite-only during the private beta

## The 3 fields the plan's answer can hold

related keywords, breakout flag, fetched at

## WordRadar's plans (4)

- [WordRadar, free](https://datacircle.dev/related-keywords-apis/wordradar/free/llms.txt): $0.00 per 1,000, 0% complete, stored
- [WordRadar, $19 pack](https://datacircle.dev/related-keywords-apis/wordradar/19-pack/llms.txt): 0% complete, stored
- [WordRadar, $49 pack](https://datacircle.dev/related-keywords-apis/wordradar/49-pack/llms.txt): 0% complete, stored
- [WordRadar, $99 pack](https://datacircle.dev/related-keywords-apis/wordradar/99-pack/llms.txt): 0% complete, stored

## WordRadar's calls for this API (1)

- `GET /api/v1/trends/{keyword}`: [WordRadar, free](https://datacircle.dev/related-keywords-apis/wordradar/free/llms.txt)

## WordRadar's APIs (2)

- [WordRadar: keyword research API pricing, 4 plans](https://datacircle.dev/keyword-research-apis/wordradar/free/llms.txt)
- [WordRadar: related keywords API pricing, 4 plans](https://datacircle.dev/related-keywords-apis/wordradar/free/llms.txt)

## WordRadar: related keywords API alternatives

- [Bing Webmaster Tools, free](https://datacircle.dev/related-keywords-apis/bing-webmaster-tools/free/llms.txt): $0.00 per 1,000, 17% complete
- [DataForSEO, free, $1 trial credit, POST /v3/dataforseo_labs/google/keyword_ideas/live](https://datacircle.dev/related-keywords-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-keyword-ideas-live/llms.txt): $0.00 per 1,000, 100% complete, 1 month
- [AnyAPI, free trial key, POST /v1/run/ahrefs.keyword_ideas](https://datacircle.dev/related-keywords-apis/anyapi/free-trial-key-post-v1-run-ahrefs-keyword-ideas/llms.txt): $0.00 per 1,000, 33% complete, stored
- [seodata.dev, free, Anonymous](https://datacircle.dev/related-keywords-apis/seodata-dev/free-anonymous/llms.txt): $0.00 per 1,000, 33% complete, stored

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://www.wordradar.dev/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.wordradar.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.wordradar.dev/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.wordradar.dev/docs/mcp?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.wordradar.dev/docs/methodology?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing
- https://www.wordradar.dev/legal/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=related-keywords-api-pricing