# SignalSumo, $99 monthly: Backlink API

> Returns a domain's backlink profile: a summary overview, distribution insights, and an enriched list of individual backlinks.

SignalSumo's "Pro — monthly" plan for the backlink API costs $24.75 per 1,000 backlinks. We check each provider's docs for 5 fields. SignalSumo's docs list all 5: Source URL, Anchor text, Follow or nofollow, Authority, First and last seen.
We haven't run SignalSumo through [our backlink API benchmark](https://datacircle.dev/best-backlink-api.txt) yet.
We rank 125 plans for backlink APIs by price. Half the plans cost $0.245 or less per 1,000 backlinks. This plan costs less per 1,000 backlinks than 2% of the 125 plans.
[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, with no charge 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, and 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/signalsumo/99-monthly
- [Backlinks API: the 8 best of 50+ SEO data providers compared](https://datacircle.dev/best-backlink-api.txt)
- Get it: https://signalsumo.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- Request: `GET https://signalsumo.com/api/v1/backlinks`
- API key: with the plan, on https://signalsumo.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- Its API docs: https://signalsumo.com/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- Sold by: SignalSumo (https://signalsumo.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing)
- Checked: 2026-11-12

## In the answer

- Completeness: 100%
- Source URL: ✓
- Anchor text: ✓
- Follow or nofollow: ✓
- Authority: ✓
- First and last seen: ✓

## Price

- $ per 1,000 backlinks: $24.75
- Per: page of 200
- Billing: monthly
- $ a month: $99

## Charges

- Also pays for: from the same budget: GET Usage · POST Keywords · POST Site Audit · GET Jobs · GET Tracked Keywords · GET Rank History · GET GSC Properties · GET GSC Queries · GET AI Projects · GET Share of Voice · GET Locations

## Overage

- Units cap: hard

## Not found

- $ per 1,000 calls that find nothing: $4,950.00

## In their words

- Their pitch: Returns a domain's backlink profile: a summary overview, distribution insights, and an enriched list of individual backlinks.

## Data

- Freshness: 2 days
- Keep data: no limit
- Use data: The reports, analysis outputs, and data exports generated by the Platform for your account are yours to use for your own business purposes. You may not resell or redistribute Platform outputs as a standalone data product without our express written consent. [...] You must not: [...] Share account credentials with third parties or resell access to the Platform without authorisation. [...] Use any output from the Platform to engage in spam, phishing, or other deceptive practices.

## Plan

- Pay: $99
- You get: 20 requests a month
- Enough for: 20 pages a month
- Expires: 1st of each month

## Rate limit

- Per second: 0.33 (20 a minute)
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: domain. Optional: page, limit
- Method: GET
- Path: /backlinks

## About the plan

- Plan: Pro — monthly
- Who can get it: anyone at least 18 years old and able to form a binding contract

## The 50 fields the plan's answer can hold

domain, domain rank, total backlinks, referring domains, referring domains nofollow, referring main domains, referring pages, referring IP addresses, referring subnets, dofollow backlinks, broken backlinks, broken pages, spam score, first seen, lost date, referring link types, referring link attributes, referring link platform types, referring link TLDs, referring link countries, source domain, source URL, target URL, anchor text, dofollow, backlink spam score, last seen, semantic location, source platform type, source country, is broken, source domain rank, source page rank, is lost, is new, link type, source page title, source page status code, target status code, source IP address, source TLD, identical links count, is indirect link, source URL is HTTPS, link attributes, text before anchor, text after anchor, keywords in top 3, keywords in top 10, keywords in top 100

## SignalSumo's plans (4)

- [SignalSumo, $99 monthly](https://datacircle.dev/backlink-apis/signalsumo/99-monthly/llms.txt): $24.75 per 1,000, 100% complete, 2 days
- [SignalSumo, $249 monthly](https://datacircle.dev/backlink-apis/signalsumo/249-monthly/llms.txt): $12.45 per 1,000, 100% complete, 7 days
- [SignalSumo, $990 yearly](https://datacircle.dev/backlink-apis/signalsumo/990-yearly/llms.txt): $20.625 per 1,000, 100% complete, 2 days
- [SignalSumo, $2,499 yearly](https://datacircle.dev/backlink-apis/signalsumo/2499-yearly/llms.txt): $10.412 per 1,000, 100% complete, 7 days

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

- `GET /backlinks`: [SignalSumo, $99 monthly](https://datacircle.dev/backlink-apis/signalsumo/99-monthly/llms.txt)

## SignalSumo's APIs (4)

- [SignalSumo Backlink API pricing, 4 plans](https://datacircle.dev/backlink-apis/signalsumo/99-monthly/llms.txt)
- [SignalSumo Domain authority API pricing, 4 plans](https://datacircle.dev/domain-authority-apis/signalsumo/99-monthly/llms.txt)
- [SignalSumo Keyword research API pricing, 4 plans](https://datacircle.dev/keyword-research-apis/signalsumo/99-monthly/llms.txt)
- [SignalSumo Related keywords API pricing, 4 plans](https://datacircle.dev/related-keywords-apis/signalsumo/99-monthly/llms.txt)

## SignalSumo: backlink API alternatives

[SignalSumo alternatives: other backlink API providers by price](https://datacircle.dev/signalsumo-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 backlinks. Each plan in the list gives live data or data at most a week old.

- [BacklinkMCP, free](https://datacircle.dev/backlink-apis/backlinkmcp/free/llms.txt): $0.00 per 1,000, 40% complete, 7 days
- [VebAPI, free trial, GET /api/backlinks/new](https://datacircle.dev/backlink-apis/vebapi/free-trial-get-api-backlinks-new/llms.txt): $0.00 per 1,000, 80% complete, 24 hours

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-12.

- https://signalsumo.com/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- https://signalsumo.com/page/terms-of-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing
- https://signalsumo.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=backlink-api-pricing