# Seonio, free $1, POST /api/v1/keywords/global: Keyword research API

> Volume, CPC, competition and a 12-month trend for up to 100 keywords in one call.

Seonio's keyword research API on its Free $1 plan. It costs $0.00 per 1,000 keywords. Seonio's docs list 4 of the 6 key fields we check: Search volume, Monthly trend, Cost per click, Competition.
We haven't run Seonio through [our keyword research API benchmark](https://datacircle.dev/best-keyword-research-api.txt) yet.
This plan is free. We rank 213 plans for keyword research APIs by price. Half the plans cost $0.80 per 1,000 keywords or less.
[Mangools's $15 monthly plan](https://datacircle.dev/keyword-research-apis/mangools/15-monthly/llms.txt) is the cheapest paid plan per 1,000 keywords. Mangools's $15 monthly plan covers up to 5,000,000 keywords a day.
[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 Mangools's $15 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), [Bing Webmaster Tools](https://datacircle.dev/keyword-research-apis/bing-webmaster-tools/free-get-webmaster-api-svc-json-getkeywordstats/llms.txt) and [seodata.dev](https://datacircle.dev/keyword-research-apis/seodata-dev/4-99-monthly/llms.txt) are the best keyword research API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/keyword-research-apis/seonio/free-1-post-api-v1-keywords-global
- [Keyword research API: the 9 best providers compared](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://seonio.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Request: `POST https://seonio.com/api/v1/keywords/global`
- API key: with the plan, on https://seonio.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Its API docs: https://seonio.com/product/api/keywords/global?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Sold by: Seonio (https://seonio.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing)
- Checked: 2026-11-06

## In the answer

- Completeness: 67%
- Search volume: ✓
- Monthly trend: ✓
- Cost per click: ✓
- Competition: ✓

## Price

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

## Charges

- Also pays for: from the same budget: Keyword Difficulty · Keyword Intent · Keyword Demographics · Keyword Clustering · Keyword Suggestions · Keyword Metrics by Country · SERP · SERP Scraper · Scraper · Website Traffic · Website Ranking · Website Category · Website Competitors · Similar Websites · URL Stats · URL Keywords · Website Stats · Backlink History · Backlink Table · AI Visibility Report · AI Visibility Result · Site Audit · Site Audit Result · Seonio SEO Agent · SEO Page Checker

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Volume, CPC, competition and a 12-month trend for up to 100 keywords in one call.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: [...] you may use reports, API responses, and outputs generated through your account for: your internal business purposes, your own websites, products, applications, and projects, client work performed by you or your organization, integrations that use Seonio data as part of a broader product or workflow, provided that you comply with these Terms and applicable law [...] You must not: resell standalone access to Seonio, resell or sublicense API access, API keys, or your account, resell raw datasets, raw API responses, or raw outputs as a separate data product, use the Service or outputs to build a substantially similar competing service without our written permission, misrepresent Seonio outputs as official, guaranteed, real-time, or independently verified data, remove or obscure any usage restrictions, source notices, or attribution requirements that may be shown in the Service

## Plan

- Pay: $0
- You get: $1
- Enough for: 1,000 results, once
- Expires: 30 days after the account is verified

## Rate limit

- Per second: 5
- Batch: 100

## Speed

- Answer: in the call

## The call

- You send: keywords
- Method: POST
- Path: /api/v1/keywords/global

## About the plan

- Plan: Free $1
- Who can get it: anyone with a verified account

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

keyword as sent, keyword, keyword match, search volume, cost per click, low top of page bid, high top of page bid, competition index, monthly searches, data through, volume source, keywords without data

## Seonio's plans (10)

- [Seonio, free $1, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/free-1-post-api-v1-keywords-global/llms.txt): $0.00 per 1,000, 67% complete, stored
- [Seonio, $10 pack, Extra Usage $10, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/10-pack-extra-usage-10-post-api-v1-keywords-global/llms.txt): 67% complete, stored
- [Seonio, $100 pack, Extra Usage $100, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/100-pack-extra-usage-100-post-api-v1-keywords-global/llms.txt): $0.87 per 1,000, 67% complete, stored
- [Seonio, $1,000 pack, Extra Usage $1,000, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/1000-pack-extra-usage-1000-post-api-v1-keywords-global/llms.txt): 67% complete, stored
- [Seonio, $15 monthly, Starter, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/15-monthly-starter-post-api-v1-keywords-global/llms.txt): $1.00 per 1,000, 67% complete, stored
- [Seonio, $30 monthly, Pro, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/30-monthly-pro-post-api-v1-keywords-global/llms.txt): $0.80 per 1,000, 67% complete, stored
- [Seonio, $60 monthly, Business, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/60-monthly-business-post-api-v1-keywords-global/llms.txt): $0.667 per 1,000, 67% complete, stored
- [Seonio, $120 yearly, Starter (yearly), POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/120-yearly-starter-yearly-post-api-v1-keywords-global/llms.txt): $0.667 per 1,000, 67% complete, stored
- [Seonio, $240 yearly, Pro (yearly), POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/240-yearly-pro-yearly-post-api-v1-keywords-global/llms.txt): $0.533 per 1,000, 67% complete, stored
- [Seonio, $480 yearly, Business (yearly), POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/480-yearly-business-yearly-post-api-v1-keywords-global/llms.txt): $0.444 per 1,000, 67% complete, stored

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

- `POST /api/v1/keywords/country`: [Seonio, free $1, POST /api/v1/keywords/country](https://datacircle.dev/keyword-research-apis/seonio/free-1-post-api-v1-keywords-country/llms.txt)
- `POST /api/v1/keywords/global`: [Seonio, free $1, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/free-1-post-api-v1-keywords-global/llms.txt)

## Seonio's APIs (8)

- [Seonio: related keywords API pricing, 10 plans](https://datacircle.dev/related-keywords-apis/seonio/free/llms.txt)
- [Seonio: backlink API pricing, 10 plans](https://datacircle.dev/backlink-apis/seonio/free/llms.txt)
- [Seonio: web scraping API pricing, 10 plans](https://datacircle.dev/web-scraping-apis/seonio/free/llms.txt)
- [Seonio: keyword research API pricing, 10 plans, POST /api/v1/keywords/global](https://datacircle.dev/keyword-research-apis/seonio/free-1-post-api-v1-keywords-global/llms.txt)
- [Seonio: SERP API pricing, 10 plans, POST /api/v1/serp/country](https://datacircle.dev/serp-apis/seonio/free-1-post-api-v1-serp-country/llms.txt)
- [Seonio: SERP API pricing, 10 plans, POST /api/v1/serp/scraper](https://datacircle.dev/serp-apis/seonio/free-1-post-api-v1-serp-scraper/llms.txt)
- [Seonio: similar companies API pricing, 10 plans, POST /api/v1/website/similar](https://datacircle.dev/similar-company-apis/seonio/free-1-post-api-v1-website-similar/llms.txt)
- [Seonio: similar companies API pricing, 10 plans, POST /api/v1/website/competitors](https://datacircle.dev/similar-company-apis/seonio/free-1-post-api-v1-website-competitors/llms.txt)
- [Seonio: ranked keywords API pricing, 10 plans, POST /api/v1/url/keywords](https://datacircle.dev/ranked-keywords-apis/seonio/free-1-post-api-v1-url-keywords/llms.txt)
- [Seonio: ranked keywords API pricing, 10 plans, POST /api/v1/website/ranking](https://datacircle.dev/ranked-keywords-apis/seonio/free-1-post-api-v1-website-ranking/llms.txt)
- [Seonio: domain authority API pricing, 10 plans, POST /api/v1/url/stats](https://datacircle.dev/domain-authority-apis/seonio/free-1-post-api-v1-url-stats/llms.txt)
- [Seonio: domain authority API pricing, 10 plans, POST /api/v1/website/stats](https://datacircle.dev/domain-authority-apis/seonio/free-1-post-api-v1-website-stats/llms.txt)

## Seonio: keyword research API alternatives

- [DataForSEO, free, $1 trial credit, POST /v3/dataforseo_labs/google/keyword_overview/live](https://datacircle.dev/keyword-research-apis/dataforseo/free-1-trial-credit-post-v3-dataforseo-labs-google-keyword-overview-live/llms.txt): $0.00 per 1,000, 100% complete, 1 month
- [Bing Webmaster Tools, free, GET /webmaster/api.svc/json/GetKeywordStats](https://datacircle.dev/keyword-research-apis/bing-webmaster-tools/free-get-webmaster-api-svc-json-getkeywordstats/llms.txt): $0.00 per 1,000, 33% complete
- [seodata.dev, free, Anonymous](https://datacircle.dev/keyword-research-apis/seodata-dev/free-anonymous/llms.txt): $0.00 per 1,000, 50% complete, stored
- [Mangools, free](https://datacircle.dev/keyword-research-apis/mangools/free/llms.txt): $0.00 per 1,000, 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 2026-11-06.

- https://seonio.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://seonio.com/product/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://seonio.com/product/api/keywords/global?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://seonio.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing