# CrawlGraph, free: Backlink API

> Synchronous backlink lookup for a single domain. Counts against the backlinks quota.

CrawlGraph's Free API key plan for the backlink API costs $0.00 per 1,000 backlinks. CrawlGraph's docs list 2 of the 5 fields on our checklist: Source URL, Authority.
We haven't run CrawlGraph through [our backlink API benchmark](https://datacircle.dev/best-backlink-api.txt) yet.
This plan is free. We rank 114 plans for backlink APIs by price. Half the plans cost $0.25 per 1,000 backlinks or less. [See how many backlink API plans are free.](https://datacircle.dev/best-backlink-api.txt)
[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.
[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/crawlgraph/free
- [Backlinks API: the 5 best providers compared](https://datacircle.dev/best-backlink-api.txt)
- Get it: https://crawlgraph.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-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=backlink-api-pricing#pricing
- Its API docs: https://crawlgraph.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing#endpoint-backlinks
- Sold by: CrawlGraph (https://crawlgraph.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing)
- Checked: 2026-11-07

## In the answer

- Completeness: 40%
- Source URL: ✓
- Authority: ✓

## Price

- $ per 1,000 backlinks: $0.00
- Per: page of 10,000
- 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: Synchronous backlink lookup for a single domain. Counts against the backlinks quota.

## 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 pages 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 12 fields the plan's answer can hold

target domain, target domain authority, target domain rank, release ID, release label, total results, results returned, source domain, source hosts, source TLD, source domain authority, source domain rank

## CrawlGraph's plans (3)

- [CrawlGraph, free](https://datacircle.dev/backlink-apis/crawlgraph/free/llms.txt): $0.00 per 1,000, 40% complete, 3 months
- [CrawlGraph, $99 pack](https://datacircle.dev/backlink-apis/crawlgraph/99-pack/llms.txt): $0.00041 per 1,000, 40% complete, 3 months
- [CrawlGraph, $19 monthly](https://datacircle.dev/backlink-apis/crawlgraph/19-monthly/llms.txt): $0.0019 per 1,000, 40% complete, 3 months

## CrawlGraph's calls (1)

- `POST /api/v1/backlinks`: [CrawlGraph, free](https://datacircle.dev/backlink-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: backlink API alternatives

- [host.io, contact us](https://datacircle.dev/backlink-apis/host-io/contact-us/llms.txt): $0.002 per 1,000, 20% complete, 1 month
- [RankParse, $199 pack, Lifetime deal, GET /v1/backlinks, Backlinks](https://datacircle.dev/backlink-apis/rankparse/199-pack-lifetime-deal-get-v1-backlinks/llms.txt): $0.004 per 1,000, 100% complete, 3 months
- [SE Ranking, $29 monthly, Add-on, monthly billing, GET /v1/backlinks/raw](https://datacircle.dev/backlink-apis/se-ranking/29-monthly-add-on-monthly-billing-get-v1-backlinks-raw/llms.txt): $0.193 per 1,000, 100% 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=backlink-api-pricing
- https://crawlgraph.com/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- https://crawlgraph.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- https://crawlgraph.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing