# TheKeyword, free: Keyword research API

> Analyze keywords to get search volume, difficulty, CPC, intent, trends, and more. Each analysis costs 1 credit.

TheKeyword's Free plan for the keyword research API costs $0.00 per 1,000 keywords. TheKeyword's docs list all 6 fields on our checklist: Search volume, Monthly trend, Cost per click, Competition, Keyword difficulty, Search intent.
In [our keyword research API benchmark](https://datacircle.dev/best-keyword-research-api.txt), the best plan from TheKeyword scores 23.5 out of 100. TheKeyword ranks 11th of 13 providers.
This plan is free. We rank 290 plans for keyword research APIs by price. Half the plans cost $1.543 per 1,000 keywords or less. [See the best free keyword research API plan.](https://datacircle.dev/best-keyword-research-api.txt)
[AppDrift's $14.99 monthly plan](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly/llms.txt) costs the least per 1,000 keywords. AppDrift's keyword research API costs nothing beyond the plan price.
[seodata.dev's $4.99 monthly plan](https://datacircle.dev/keyword-research-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 AppDrift's $14.99 monthly plan.
[DataForSEO](https://datacircle.dev/keyword-research-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-dataforseo-labs-google-keyword-overview-live/llms.txt), [AppDrift](https://datacircle.dev/keyword-research-apis/appdrift/14-99-monthly/llms.txt) and [Bing Webmaster Tools](https://datacircle.dev/keyword-research-apis/bing-webmaster-tools/free-get-webmaster-api-svc-json-getkeywordstats/llms.txt) are the best keyword research API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/keyword-research-apis/thekeyword/free
- [Keyword research API: the 13 best providers compared](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://thekeyword.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Request: `POST https://api.thekeyword.io/api/v1/keywords/analyze`
- API key: with the plan, on https://thekeyword.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Its API docs: https://github.com/andginja/keywordskills/blob/main/skills/keyword-analysis/SKILL.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing#single-keyword-analysis
- Sold by: TheKeyword (https://thekeyword.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 100%
- Search volume: ✓
- Monthly trend: ✓
- Cost per click: ✓
- Competition: ✓
- Keyword difficulty: ✓
- Search intent: ✓

## Price

- $ per 1,000 keywords: $0.00
- Per: call
- Billing: free

## Charges

- Start fee: $0.00
- Also pays for: nothing else

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Analyze keywords to get search volume, difficulty, CPC, intent, trends, and more. Each analysis costs 1 credit.

## Data

- Keep data: no limit
- Use data: Terms of Service, 4. Acceptable Use: "You agree not to: Share or resell API keys or data to third parties without authorization, Attempt to circumvent rate limits or usage quotas, Use the Service for any unlawful purpose, Reverse-engineer, scrape, or systematically download data beyond your plan limits, Interfere with the Service's infrastructure or other users' access"

## Plan

- Pay: $0
- You get: 3 credits a month
- Enough for: 3 calls a month

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 2.48 s

## The call

- You send: keyword, country
- Method: POST
- Path: /api/v1/keywords/analyze

## About the plan

- Plan: Free
- Who can get it: anyone at least 18 years old, one free account per person or entity

## The 12 fields the plan's answer can hold

keyword, search volume, keyword difficulty, difficulty label, cost per click, cost per click currency, competition, competition level, opportunity score, search intent, trend direction, monthly searches

## TheKeyword's plans (5)

- [TheKeyword, free](https://datacircle.dev/keyword-research-apis/thekeyword/free/llms.txt): $0.00 per 1,000, 100% complete
- [TheKeyword, $19 monthly, Starter, POST /api/v1/keywords/analyze](https://datacircle.dev/keyword-research-apis/thekeyword/19-monthly-starter-post-api-v1-keywords-analyze/llms.txt): $95.00 per 1,000, 100% complete
- [TheKeyword, $49 monthly, Pro, POST /api/v1/keywords/analyze](https://datacircle.dev/keyword-research-apis/thekeyword/49-monthly-pro-post-api-v1-keywords-analyze/llms.txt): $49.00 per 1,000, 100% complete
- [TheKeyword, $149 monthly, Ultra, POST /api/v1/keywords/analyze](https://datacircle.dev/keyword-research-apis/thekeyword/149-monthly-ultra-post-api-v1-keywords-analyze/llms.txt): $29.80 per 1,000, 100% complete
- [TheKeyword, contact us, Enterprise, POST /api/v1/keywords/analyze](https://datacircle.dev/keyword-research-apis/thekeyword/contact-us-enterprise-post-api-v1-keywords-analyze/llms.txt): 100% complete

## TheKeyword's calls for this API (2)

- `POST /api/v1/keywords/analyze`: [TheKeyword, free](https://datacircle.dev/keyword-research-apis/thekeyword/free/llms.txt)
- `POST /api/v1/keywords/batch`: [TheKeyword, $19 monthly, Starter, POST /api/v1/keywords/batch](https://datacircle.dev/keyword-research-apis/thekeyword/19-monthly-starter-post-api-v1-keywords-batch/llms.txt)

## TheKeyword's APIs (2)

- [TheKeyword: keyword research API pricing, 5 plans](https://datacircle.dev/keyword-research-apis/thekeyword/free/llms.txt)
- [TheKeyword: related keywords API pricing, 5 plans](https://datacircle.dev/related-keywords-apis/thekeyword/free/llms.txt)

## TheKeyword: keyword research API alternatives

- [Ranxplorer, €2,500 pack, Sans abonnement 10 M, POST /v1/bulk/keywords](https://datacircle.dev/keyword-research-apis/ranxplorer/2500-pack-sans-abonnement-10-m-post-v1-bulk-keywords/llms.txt): $28.133 per 1,000, 50% complete
- [Jungle Scout, $29 monthly](https://datacircle.dev/keyword-research-apis/jungle-scout/29-monthly/llms.txt): $29.00 per 1,000, 0% complete
- [SearcherLite, $297 pack, Enterprise, keyword_overview](https://datacircle.dev/keyword-research-apis/searcherlite/297-pack-enterprise-keyword-overview/llms.txt): $29.70 per 1,000, 100% complete
- [1Lookup, $99 monthly, Starter, POST /keyword-metrics](https://datacircle.dev/keyword-research-apis/1lookup/99-monthly-starter-post-keyword-metrics/llms.txt): $29.70 per 1,000, 33% 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 2026-11-07.

- https://raw.githubusercontent.com/andginja/keywordskills/main/skills/keyword-analysis/SKILL.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://raw.githubusercontent.com/andginja/keywordskills/main/skills/thekeyword-setup/SKILL.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://thekeyword.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://thekeyword.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://thekeyword.io/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing