# Aizhan, free trial, GET /so/index/{key}: Keyword research API

> 获取360关键词指数/热度趋势

Aizhan's keyword research API on its Free trial 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.
Aizhan limits how many results you get but gives no number.
We haven't run Aizhan through [our keyword research API benchmark](https://datacircle.dev/best-keyword-research-api.txt) yet.
This plan is free. We rank 130 plans for keyword research APIs by price. Half the plans cost $1.797 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: as little as $0.0001. Mangools's $15 monthly plan covers up to 5,000,000 keywords a day.
[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 [Mangools](https://datacircle.dev/keyword-research-apis/mangools/15-monthly/llms.txt) are the best keyword research API providers in our benchmark.

- This page: https://datacircle.dev/keyword-research-apis/aizhan/free-trial-get-so-index-key
- [Keyword research API: 4 providers compared on price and data](https://datacircle.dev/best-keyword-research-api.txt)
- Get it: https://apistore.aizhan.com/detail/45/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Request: `GET https://apistore.aizhan.com/so/index/{key}`
- API key: with the plan, on https://apistore.aizhan.com/detail/45/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Its API docs: https://apistore.aizhan.com/detail/45/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- Sold by: Aizhan (https://apistore.aizhan.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 0%

## Price

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

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: 获取360关键词指数/热度趋势

## Data

- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: CNY 0

## Rate limit

- Batch: 50

## Speed

- Answer: in the call

## The call

- You send: words
- Method: GET
- Path: /so/index/{key}

## About the plan

- Plan: Free trial
- Who can get it: anyone

## The 2 fields the plan's answer can hold

keyword, keyword index

## Aizhan's plans (4)

- [Aizhan, free trial, GET /so/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/free-trial-get-so-index-key/llms.txt): $0.00 per 1,000, 0% complete
- [Aizhan, top-up, Standard price, GET /so/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/top-up-standard-price-get-so-index-key/llms.txt): $1.196 per 1,000, 0% complete
- [Aizhan, CNY 28 pack, 5,000 calls, GET /so/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/cny-28-pack-5000-calls-get-so-index-key/llms.txt): $0.838 per 1,000, 0% complete
- [Aizhan, CNY 70 pack](https://datacircle.dev/keyword-research-apis/aizhan/cny-70-pack/llms.txt): $2.094 per 1,000, 0% complete

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

- `GET /so/index/{key}`: [Aizhan, free trial, GET /so/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/free-trial-get-so-index-key/llms.txt)
- `GET /baidu/index/{key}`: [Aizhan, free trial, GET /baidu/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/free-trial-get-baidu-index-key/llms.txt)
- `GET /wechat/index/{key}`: [Aizhan, free trial, GET /wechat/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/free-trial-get-wechat-index-key/llms.txt)

## Aizhan's APIs (6)

- [Aizhan: domain authority API pricing, 3 plans, GET /sorank/siteinfos/{key}](https://datacircle.dev/domain-authority-apis/aizhan/free-trial-get-sorank-siteinfos-key/llms.txt)
- [Aizhan: domain authority API pricing, 3 plans, GET /sogourank/siteinfos/{key}](https://datacircle.dev/domain-authority-apis/aizhan/free-trial-get-sogourank-siteinfos-key/llms.txt)
- [Aizhan: domain authority API pricing, 3 plans, GET /toutiaorank/siteinfos/{key}](https://datacircle.dev/domain-authority-apis/aizhan/free-trial-get-toutiaorank-siteinfos-key/llms.txt)
- [Aizhan: keyword research API pricing, 4 plans, GET /so/index/{key}](https://datacircle.dev/keyword-research-apis/aizhan/free-trial-get-so-index-key/llms.txt)
- [Aizhan: backlink API pricing, 3 plans](https://datacircle.dev/backlink-apis/aizhan/free/llms.txt)
- [Aizhan: related keywords API pricing, 3 plans](https://datacircle.dev/related-keywords-apis/aizhan/free/llms.txt)
- [Aizhan: SERP API pricing, 4 plans, GET /googlerank/addtasks/{key}](https://datacircle.dev/serp-apis/aizhan/free-trial-get-googlerank-addtasks-key/llms.txt)
- [Aizhan: SERP API pricing, 4 plans, GET /baidurank/mobileaddtasks/{key}](https://datacircle.dev/serp-apis/aizhan/free-trial-get-baidurank-mobileaddtasks-key/llms.txt)
- [Aizhan: SERP API pricing, 4 plans, GET /baidurank/pcaddtasks/{key}](https://datacircle.dev/serp-apis/aizhan/free-trial-get-baidurank-pcaddtasks-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /smrank/mobileexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-smrank-mobileexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /toutiaorank/mobileexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-toutiaorank-mobileexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /sorank/mobileexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-sorank-mobileexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /sorank/pcexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-sorank-pcexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /baidurank/mobileemulation/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-baidurank-mobileemulation-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /baidurank/mobileexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-baidurank-mobileexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /baidurank/pcemulation/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-baidurank-pcemulation-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /baidurank/pcexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-baidurank-pcexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /sogourank/mobileexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-sogourank-mobileexport-key/llms.txt)
- [Aizhan: ranked keywords API pricing, 4 plans, GET /sogourank/pcexport/{key}](https://datacircle.dev/ranked-keywords-apis/aizhan/free-trial-get-sogourank-pcexport-key/llms.txt)

## Aizhan: keyword research API alternatives

- [Chinaz, CNY 400 pack, 80000次, POST /batch/index/so](https://datacircle.dev/keyword-research-apis/chinaz/cny-400-pack-80000-post-batch-index-so/llms.txt): $0.748 per 1,000, 17% complete
- [SocQ, top-up from $5, Starter, POST /v1/seo/keyword-overview](https://datacircle.dev/keyword-research-apis/socq/top-up-from-5-starter-post-v1-seo-keyword-overview/llms.txt): $0.75 per 1,000, 100% complete
- [Omkar Cloud, $16 monthly, Starter Plan, GET /keywords/volume](https://datacircle.dev/keyword-research-apis/omkar-cloud/16-monthly-starter-plan-get-keywords-volume/llms.txt): $0.80 per 1,000, 67% complete, live
- [Keywords Everywhere, $84 yearly](https://datacircle.dev/keyword-research-apis/keywords-everywhere/84-yearly/llms.txt): $0.84 per 1,000, 67% 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 2026-11-04.

- https://apistore.aizhan.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://apistore.aizhan.com/detail/45/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://apistore.aizhan.com/list/c0-1/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing
- https://apistore.aizhan.com/list/c0-2/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=keyword-research-api-pricing