# SEO Tester Online, contact us: Backlink API

> Domain Rating, URL Rating, and Anchor Text are just a few of the many metrics you'll get with SEO Tester Online's backlink API.

SEO Tester Online's Enterprise plan lets you call the backlink API. We check each provider's docs for 5 fields. SEO Tester Online's docs list 1: Anchor text.
We haven't run SEO Tester Online through [our backlink API benchmark](https://datacircle.dev/best-backlink-api.txt) yet.
SEO Tester Online gives this plan's price on request. We rank 118 plans for backlink APIs by price. Half the plans cost $0.233 or less per 1,000 backlinks.
[Keys.so's ₽34,900 (about $417) monthly plan](https://datacircle.dev/backlink-apis/keys-so/34900-monthly/llms.txt) is the cheapest paid plan per 1,000 backlinks. Keys.so's ₽34,900 (about $417) monthly plan charges nothing per call. You get as many backlinks as Keys.so's rate limit allows. [AnyAPI's pay-as-you-go plan](https://datacircle.dev/backlink-apis/anyapi/pay-as-you-go-pay-per-call-with-x402-and-mpp-post-v1-run-seo-backlinks/llms.txt) costs the least for 10,000 backlinks a month: $0.50.
[BacklinkMCP's $19 monthly plan](https://datacircle.dev/backlink-apis/backlinkmcp/19-monthly/llms.txt) covers any number of backlinks. BacklinkMCP's $19 monthly plan costs less up front than Keys.so's ₽34,900 (about $417) monthly plan.
[DataForSEO](https://datacircle.dev/backlink-apis/dataforseo/top-up-from-50/llms.txt), [BacklinkMCP](https://datacircle.dev/backlink-apis/backlinkmcp/19-monthly/llms.txt) and [SE Ranking](https://datacircle.dev/backlink-apis/se-ranking/29-monthly-add-on-monthly-billing-get-v1-backlinks-raw/llms.txt) are the best backlink API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/backlink-apis/seo-tester-online/contact-us
- [Backlinks API in 2026: the 7 best of 50+ providers compared](https://datacircle.dev/best-backlink-api.txt)
- Get it: https://www.seotesteronline.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- Request: Docs on request from sales
- API key: with the plan, on https://www.seotesteronline.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- Its API docs: https://www.seotesteronline.com/seo-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- Sold by: SEO Tester Online (https://www.seotesteronline.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing)
- Checked: 2026-11-09

## In the answer

- Completeness: 20%
- Anchor text: ✓

## Price

- Billing: contact

## In their words

- Their pitch: Domain Rating, URL Rating, and Anchor Text are just a few of the many metrics you'll get with SEO Tester Online's backlink API.

## Data

- Keep data: no limit
- Use data: You are expressly prohibited from using the Services in the following ways or for each of the following purposes: [...] You must not, without our prior written consent, rent, release or sublicense, except as specifically stated in your subscription plan, (i) copy, distribute (including parts of our Services or our Website), modify, increase, translate, reproduce, sell, resell, sublicense, rent, rent, lease or any other attempt to exploit the Services or any other data contained in them, [...] (vi) provide the Website or the Services or any other usable part to third parties in the form of services or in the form of outsourcing or in any other form of commercial sharing, data processing or any other use of third party SEO products or services Online Tester. [...] All data associated with this API is the Company’s owner.

## The call

- You send: Docs on request from sales

## About the plan

- Plan: Enterprise
- Who can get it: anyone 18 or over (13 or over with a parent or guardian's consent, by country), a human and not a bot, who gave truthful registration information

## The 3 fields the plan's answer can hold

anchor text, domain rating, URL rating

## SEO Tester Online's plans (1)

- [SEO Tester Online, contact us](https://datacircle.dev/backlink-apis/seo-tester-online/contact-us/llms.txt): 20% complete

## SEO Tester Online's calls (1)

- Docs on request from sales: [SEO Tester Online, contact us](https://datacircle.dev/backlink-apis/seo-tester-online/contact-us/llms.txt)

## SEO Tester Online's APIs (3)

- [SEO Tester Online: backlink API pricing, 1 plan](https://datacircle.dev/backlink-apis/seo-tester-online/contact-us/llms.txt)
- [SEO Tester Online: domain authority API pricing, 1 plan](https://datacircle.dev/domain-authority-apis/seo-tester-online/contact-us/llms.txt)
- [SEO Tester Online: keyword research API pricing, 1 plan](https://datacircle.dev/keyword-research-apis/seo-tester-online/contact-us/llms.txt)

## SEO Tester Online: backlink API alternatives

- [SEObserver, contact us, API subscription, GET /backlinks/anchors.json](https://datacircle.dev/backlink-apis/seobserver/contact-us-api-subscription-get-backlinks-anchors-json/llms.txt): 40% complete
- [VerifiedDR, contact us](https://datacircle.dev/backlink-apis/verifieddr/contact-us/llms.txt): 20% complete, stored
- [Dataprovider.com, contact us, API, GET /links/incoming/anchor-texts](https://datacircle.dev/backlink-apis/dataprovider-com/contact-us-api-get-links-incoming-anchor-texts/llms.txt): 20% complete, 1 month
- [Morningscore, contact us](https://datacircle.dev/backlink-apis/morningscore/contact-us/llms.txt): 20% 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 2026-11-09.

- https://www.seotesteronline.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- https://www.seotesteronline.com/seo-api/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- https://www.seotesteronline.com/terms-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing