# SEO Review Tools, free: Domain authority API

> The Domain & Page Authority score API is designed to automatically collect authority scores for individual URLs and Domains.

SEO Review Tools's domain authority API on its Free trial plan. It costs $0.00 per 1,000 domains. It returns 1 of the 5 key fields we check: Authority score.
We rank 71 plans by price. [DataForSEO's top-up from $50](https://datacircle.dev/domain-authority-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-backlinks-bulk-ranks-live/llms.txt) costs the least per 1,000 domains: $0.036.
[AnyAPI](https://datacircle.dev/domain-authority-apis/anyapi/top-up-from-10-manual-top-up-post-v1-run-semrush-overview/llms.txt), [SE Ranking](https://datacircle.dev/domain-authority-apis/se-ranking/29-monthly-add-on-monthly-billing-get-v1-backlinks-authority-domain/llms.txt) and [DataForSEO](https://datacircle.dev/domain-authority-apis/dataforseo/top-up-from-50-pay-as-you-go-post-v3-backlinks-bulk-ranks-live/llms.txt) are the best domain authority API providers in our benchmark.

- This page: https://datacircle.dev/domain-authority-apis/seo-review-tools/free
- [Best domain authority API in 2026: providers compared](https://datacircle.dev/best-domain-authority-api.txt)
- Get it: https://www.seoreviewtools.com/api-pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- Request: `GET https://api.seoreviewtools.com/authority-score/`
- API key: with the plan, on https://www.seoreviewtools.com/api-pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- Its API docs: https://www.seoreviewtools.com/authority-score-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- Sold by: SEO Review Tools (https://www.seoreviewtools.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 20%
- Authority score: ✓

## Price

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

## Charges

- Also pays for: from the same budget: 57 other calls

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: The Domain & Page Authority score API is designed to automatically collect authority scores for individual URLs and Domains.

## Data

- Keep data: no limit
- Use data: There are no restrictions on how you may use the data obtained from the API. You may modify, combine, distribute, or otherwise use the data in any way that complies with applicable laws and regulations. However, you are solely responsible for ensuring that your use of the data complies with all local, national, and international laws. [...] You agree not to misuse our Services or APIs. Misuse includes, but is not limited to, violating applicable laws, reverse engineering, circumventing technical limits, or engaging in any fraudulent activities.

## Plan

- Pay: $0
- You get: 500 credits
- Expires: 15 days

## Rate limit

- Per second: 16.67
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: url. Optional: metrics
- Method: GET
- Path: /authority-score/

## About the plan

- Plan: Free trial
- Who can get it: anyone who signs up with a payment method: the trial turns into a paid subscription unless cancelled before its 15 days end

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

page authority, domain authority

## SEO Review Tools's plans (7)

- [SEO Review Tools, free](https://datacircle.dev/domain-authority-apis/seo-review-tools/free/llms.txt): $0.00 per 1,000, 20% complete
- [SEO Review Tools, $75 monthly](https://datacircle.dev/domain-authority-apis/seo-review-tools/75-monthly/llms.txt): 20% complete
- [SEO Review Tools, $175 monthly](https://datacircle.dev/domain-authority-apis/seo-review-tools/175-monthly/llms.txt): 20% complete
- [SEO Review Tools, $450 monthly](https://datacircle.dev/domain-authority-apis/seo-review-tools/450-monthly/llms.txt): 20% complete
- [SEO Review Tools, $720 yearly](https://datacircle.dev/domain-authority-apis/seo-review-tools/720-yearly/llms.txt): 20% complete
- [SEO Review Tools, $1,680 yearly](https://datacircle.dev/domain-authority-apis/seo-review-tools/1680-yearly/llms.txt): 20% complete
- [SEO Review Tools, $4,320 yearly](https://datacircle.dev/domain-authority-apis/seo-review-tools/4320-yearly/llms.txt): 20% complete

## SEO Review Tools's calls for this API (1)

- `GET /authority-score/`: [SEO Review Tools, free](https://datacircle.dev/domain-authority-apis/seo-review-tools/free/llms.txt)

## SEO Review Tools's APIs (2)

- [SEO Review Tools: backlink API pricing, 7 plans](https://datacircle.dev/backlink-apis/seo-review-tools/free/llms.txt)
- [SEO Review Tools: domain authority API pricing, 7 plans](https://datacircle.dev/domain-authority-apis/seo-review-tools/free/llms.txt)

## SEO Review Tools: domain authority API alternatives

- [AnyAPI, free trial key, POST /v1/run/seo.backlinks_summary](https://datacircle.dev/domain-authority-apis/anyapi/free-trial-key-post-v1-run-seo-backlinks-summary/llms.txt): $0.00 per 1,000, 100% complete
- [SE Ranking, free trial, GET /v1/backlinks/summary](https://datacircle.dev/domain-authority-apis/se-ranking/free-trial-get-v1-backlinks-summary/llms.txt): $0.00 per 1,000, 60% complete, 1 month
- [DataForSEO, free, $1 trial credit, POST /v3/backlinks/summary/live](https://datacircle.dev/domain-authority-apis/dataforseo/free-1-trial-credit-post-v3-backlinks-summary-live/llms.txt): $0.00 per 1,000, 100% complete, stored
- [RankParse, free, GET /v1/domain-authority](https://datacircle.dev/domain-authority-apis/rankparse/free/llms.txt): $0.00 per 1,000, 40% complete, 3 months

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-02.

- https://api.seoreviewtools.com/documentation/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://api.seoreviewtools.com/documentation/terms-and-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://www.seoreviewtools.com/api-pricing/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://www.seoreviewtools.com/authority-score-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://www.seoreviewtools.com/seo-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing