# Moz, free: Keyword research API

> You can use the API to retrieve keyword metrics such as monthly search volume, research ranking opportunities or strengthen content briefs by generating related keywords [...]

Moz's keyword research API on its Free plan. It costs $0.00 per 1,000 keywords. It returns 2 of the 6 key fields we check: Search volume, Keyword difficulty.
We rank 35 plans by price. [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.

- This page: https://datacircle.dev/keyword-research-apis/moz/free
- Get it: https://moz.com/products/api/pricing
- Request: `POST https://api.moz.com/jsonrpc`
- API key: with the plan, on https://moz.com/products/api/pricing
- Its API docs: https://moz.com/api/docs/data.keyword.metrics.fetch
- Sold by: Moz (https://moz.com)
- Checked: 2026-10-29

## In the answer

- Completeness: 33%
- Search volume: ✓
- Keyword difficulty: ✓

## Price

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

## Charges

- Also pays for: from the same budget: URL Metrics · Links · Brand Authority · Link Intersect · Linking Root Domains · Link Status · Anchor Text · Final Redirect · Top Pages · Global Top Pages · Global Top Root Domains · Index Metadata · Usage Data · Keyword Suggestions · Search Intent · Ranking Keywords

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: You can use the API to retrieve keyword metrics such as monthly search volume, research ranking opportunities or strengthen content briefs by generating related keywords [...]

## Data

- Keep data: no limit
- Use data: use the Service to access the Data for Subscriber’s internal business purpose requiring analyzing URLs, (ii) display Data internally within its business, and (iii) display Data externally provided such display is done in accordance with Our attribution policy [...] Subscriber will not (nor will permit anyone else to) : (a) sell or otherwise charge anyone specifically or solely for the access or use of the Service except as permitted under the Agreement, (b) create any derivative works of the Service, (c) combine Data with constant factors [...], (d) copy, store, archive or extract Data in a manner not explicitly permitted herein, [...] (f) permit third parties to use the API key, [...] When displaying Moz API data (links, metrics, and anchor text), use our approved logo and link it to https://moz.com/. [...] You may not white-label our metrics. When you display data from Moz API, you must label it as originating from the Moz API.

## Plan

- Pay: $0
- You get: 50 credits a month

## Rate limit

- Per second: 0.1
- Batch: 1

## The call

- You send: Content-Type header "application/json", jsonrpc "2.0", id, method "data.keyword.metrics.fetch", params.data.serp_query.keyword
- Method: POST
- Path: /jsonrpc

## About the plan

- Plan: Free
- Who can get it: anyone with a valid, non-expired credit card

## The 9 fields the plan's answer can hold

keyword, locale, device, search engine, vicinity, search volume, keyword difficulty, organic CTR, priority

## Moz's plans (7)

- [Moz, free](https://datacircle.dev/keyword-research-apis/moz/free/llms.txt): $0.00 per 1,000, 33% complete
- [Moz, $20 monthly](https://datacircle.dev/keyword-research-apis/moz/20-monthly/llms.txt): 33% complete
- [Moz, $75 monthly](https://datacircle.dev/keyword-research-apis/moz/75-monthly/llms.txt): 33% complete
- [Moz, $125 monthly](https://datacircle.dev/keyword-research-apis/moz/125-monthly/llms.txt): 33% complete
- [Moz, $250 monthly](https://datacircle.dev/keyword-research-apis/moz/250-monthly/llms.txt): 33% complete
- [Moz, $500 monthly](https://datacircle.dev/keyword-research-apis/moz/500-monthly/llms.txt): 33% complete
- [Moz, contact us](https://datacircle.dev/keyword-research-apis/moz/contact-us/llms.txt): 33% complete

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

- `POST /jsonrpc`: [Moz, free](https://datacircle.dev/keyword-research-apis/moz/free/llms.txt)

## Moz's APIs (5)

- [Moz: backlink API pricing, 7 plans](https://datacircle.dev/backlink-apis/moz/free/llms.txt)
- [Moz: domain authority API pricing, 7 plans](https://datacircle.dev/domain-authority-apis/moz/free/llms.txt)
- [Moz: keyword research API pricing, 7 plans](https://datacircle.dev/keyword-research-apis/moz/free/llms.txt)
- [Moz: ranked keywords API pricing, 7 plans](https://datacircle.dev/ranked-keywords-apis/moz/free/llms.txt)
- [Moz: related keywords API pricing, 7 plans](https://datacircle.dev/related-keywords-apis/moz/free/llms.txt)

## Moz: keyword research API alternatives

- [SE Ranking, free](https://datacircle.dev/keyword-research-apis/se-ranking/free/llms.txt): $0.00 per 1,000, 100% complete, 1 month
- [AnyAPI, free trial key, POST /v1/run/seo.keyword_overview](https://datacircle.dev/keyword-research-apis/anyapi/free-trial-key-post-v1-run-seo-keyword-overview/llms.txt): $0.00 per 1,000, 100% complete
- [RankParse, free](https://datacircle.dev/keyword-research-apis/rankparse/free/llms.txt): $0.00 per 1,000, 50% complete
- [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

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-29.

- https://moz.com/api
- https://moz.com/api-general-conditions
- https://moz.com/api/docs
- https://moz.com/api/docs/guides/error-handling
- https://moz.com/api/docs/guides/getting-started
- https://moz.com/api/docs/guides/rate-limiting
- https://moz.com/help/links-api/getting-started/legal
- https://moz.com/products/api/pricing