# BacklinkMCP, free: Domain authority API

> One GET request or one MCP tool call returns an editorial-authority score, referring domain count, and outbound link count for any domain.

BacklinkMCP's domain authority API on its Free plan. It costs $0.00 per 1,000 domains. It returns 2 of the 5 key fields we check: Authority score, Referring domains.
We haven't run BacklinkMCP through [our domain authority API benchmark](https://datacircle.dev/best-domain-authority-api.txt) yet.
This plan is free. We rank 161 plans for domain authority APIs by price. Half the plans cost $3.98 per 1,000 domains or less.
[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) is the cheapest paid plan per 1,000 domains: $0.036.
[BacklinkMCP's $19 monthly plan](https://datacircle.dev/domain-authority-apis/backlinkmcp/19-monthly/llms.txt) covers any number of domains. BacklinkMCP's $19 monthly plan costs less up front than DataForSEO's top-up from $50.
[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 the Datacircle benchmark.

- This page: https://datacircle.dev/domain-authority-apis/backlinkmcp/free
- [Domain authority API: the 4 best providers compared](https://datacircle.dev/best-domain-authority-api.txt)
- Get it: https://backlinkmcp.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- Request: `GET https://backlinkmcp.com/api/v1/authority`
- API key: not needed
- Its API docs: https://backlinkmcp.com/domain-authority-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- Sold by: BacklinkMCP (https://backlinkmcp.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 40%
- Authority score: ✓
- Referring domains: ✓

## Price

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

## Charges

- Also pays for: from the same budget: backlinks_for_domain · top_linkers_for_domain · verify_link_live · find_link_prospects · flag_toxic_links · common_linkers · ai_crawler_audit · site_audit · schema_validate · core_web_vitals · indexnow_submit

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: One GET request or one MCP tool call returns an editorial-authority score, referring domain count, and outbound link count for any domain.

## Data

- Freshness: 7 days
- Keep data: no limit
- Use data: Do not attempt to bypass rate limits, scrape internals, attack the service, or use results to claim URL-level backlink attributes the product does not provide. Automated use of the public API and MCP within the published caps is allowed.

## Plan

- Pay: $0
- You get: 10 requests a day
- Enough for: 10 calls a day

## Rate limit

- Per day: 10
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain
- Method: GET
- Path: /api/v1/authority

## About the plan

- Plan: Free
- Who can get it: anyone

## The 5 fields the plan's answer can hold

domain, found, domain authority, referring domains, outbound links

## BacklinkMCP's plans (2)

- [BacklinkMCP, free](https://datacircle.dev/domain-authority-apis/backlinkmcp/free/llms.txt): $0.00 per 1,000, 40% complete, 7 days
- [BacklinkMCP, $19 monthly](https://datacircle.dev/domain-authority-apis/backlinkmcp/19-monthly/llms.txt): no limit, 40% complete, 7 days

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

- `GET /api/v1/authority`: [BacklinkMCP, free](https://datacircle.dev/domain-authority-apis/backlinkmcp/free/llms.txt)

## BacklinkMCP's APIs (2)

- [BacklinkMCP: backlink API pricing, 2 plans](https://datacircle.dev/backlink-apis/backlinkmcp/free/llms.txt)
- [BacklinkMCP: domain authority API pricing, 2 plans](https://datacircle.dev/domain-authority-apis/backlinkmcp/free/llms.txt)

## BacklinkMCP: domain authority API alternatives

- [Omkar Cloud, free plan, GET /domains/authority, 1,000 requests a month](https://datacircle.dev/domain-authority-apis/omkar-cloud/free-plan-get-domains-authority-1000-requests-a-month/llms.txt): $0.00 per 1,000, 60% complete, live
- [DR Checker, $109.80 yearly, Pro, POST /api/tools/authority-score](https://datacircle.dev/domain-authority-apis/dr-checker/109-80-yearly-pro-post-api-tools-authority-score/llms.txt): $45.75 per 1,000, 40% complete, 7 days

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://backlinkmcp.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://backlinkmcp.com/bulk-backlink-analysis-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://backlinkmcp.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://backlinkmcp.com/domain-authority-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://backlinkmcp.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://backlinkmcp.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing