# CrawlGraph, free: Domain authority API

> cg_authority is a 0-100 log-rank percentile derived from Common Crawl's harmonic centrality (higher = more authoritative).

CrawlGraph's Free API key plan for the domain authority API costs $0.00 per 1,000 domains. CrawlGraph's docs list 2 of the 5 fields on our checklist: Authority score, Referring domains.
We haven't run CrawlGraph through [our domain authority API benchmark](https://datacircle.dev/best-domain-authority-api.txt) yet.
This plan is free. We rank 227 plans for domain authority APIs by price. Half the plans cost $3.98 per 1,000 domains or less. [See the best free domain authority API plan.](https://datacircle.dev/best-domain-authority-api.txt)
[Morningscore's $69 monthly plan](https://datacircle.dev/domain-authority-apis/morningscore/69-monthly/llms.txt) is the cheapest paid plan per 1,000 domains. Morningscore's domain authority API costs nothing beyond the plan price.
[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 Morningscore's $69 monthly plan.
[BacklinkMCP](https://datacircle.dev/domain-authority-apis/backlinkmcp/19-monthly/llms.txt), [Tranco](https://datacircle.dev/domain-authority-apis/tranco/free/llms.txt) and [Morningscore](https://datacircle.dev/domain-authority-apis/morningscore/69-monthly/llms.txt) are the best domain authority API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/domain-authority-apis/crawlgraph/free
- [Domain authority API: the 16 best providers compared](https://datacircle.dev/best-domain-authority-api.txt)
- Get it: https://crawlgraph.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing#pricing
- Request: `POST https://crawlgraph.com/api/v1/backlinks`
- API key: with the plan, on https://crawlgraph.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing#pricing
- Its API docs: https://crawlgraph.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing#endpoint-backlinks
- Sold by: CrawlGraph (https://crawlgraph.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing)
- Checked: 2026-11-07

## In the answer

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

## Price

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

## Charges

- Also pays for: GET /api/v1/releases: unlimited · from the same budget: GET /api/v1/changes

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: cg_authority is a 0-100 log-rank percentile derived from Common Crawl's harmonic centrality (higher = more authoritative).

## Data

- Freshness: 3 months
- Keep data: no limit
- Use data: You agree not to: (a) scrape or bulk-download results in a way that circumvents rate limits, (b) resell or redistribute raw query output as a competing product, (c) use the service for illegal purposes, or (d) attempt to compromise the security of our systems. [...] The public API has fair-use limits that we may change at our discretion.

## Plan

- Pay: $0
- You get: 15 requests a month
- Enough for: 15 calls a month
- Expires: end of the month (UTC), no rollover

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain. Optional: release_id, limit, sort
- Method: POST
- Path: /api/v1/backlinks

## About the plan

- Plan: Free API key
- Who can get it: anyone with an email address

## The 6 fields the plan's answer can hold

domain, release ID, release label, domain authority, domain rank, referring domains

## CrawlGraph's plans (3)

- [CrawlGraph, free](https://datacircle.dev/domain-authority-apis/crawlgraph/free/llms.txt): $0.00 per 1,000, 40% complete, 3 months
- [CrawlGraph, $99 pack](https://datacircle.dev/domain-authority-apis/crawlgraph/99-pack/llms.txt): $4.125 per 1,000, 40% complete, 3 months
- [CrawlGraph, $19 monthly](https://datacircle.dev/domain-authority-apis/crawlgraph/19-monthly/llms.txt): $19.00 per 1,000, 40% complete, 3 months

## CrawlGraph's calls (1)

- `POST /api/v1/backlinks`: [CrawlGraph, free](https://datacircle.dev/domain-authority-apis/crawlgraph/free/llms.txt)

## CrawlGraph's APIs (2)

- [CrawlGraph: backlink API pricing, 3 plans](https://datacircle.dev/backlink-apis/crawlgraph/free/llms.txt)
- [CrawlGraph: domain authority API pricing, 3 plans](https://datacircle.dev/domain-authority-apis/crawlgraph/free/llms.txt)

## CrawlGraph: domain authority API alternatives

- [SE Ranking, top-up from $50, Wallet, GET /v1/backlinks/authority/domain](https://datacircle.dev/domain-authority-apis/se-ranking/top-up-from-50-wallet-get-v1-backlinks-authority-domain/llms.txt): $1.00 per 1,000, 20% complete, 1 month
- [UnblockingAPI, €10 pack](https://datacircle.dev/domain-authority-apis/unblockingapi/10-pack/llms.txt): $1.125 per 1,000, 60% complete, live
- [RankParse, $199 pack, Lifetime deal, GET /v1/domain-rank](https://datacircle.dev/domain-authority-apis/rankparse/199-pack-lifetime-deal-get-v1-domain-rank/llms.txt): $3.98 per 1,000, 20% complete, 3 months
- [host.io, $499 monthly](https://datacircle.dev/domain-authority-apis/host-io/499-monthly/llms.txt): $4.99 per 1,000, 0% complete, 1 month

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-07.

- https://crawlgraph.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://crawlgraph.com/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://crawlgraph.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing
- https://crawlgraph.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=domain-authority-api-pricing