Top 10 Best Backlinks APIs in 2026

Finding a reliable SEO backlink API is really hard. When evaluating a backlinks API for live applications, data architects must avoid inflated databases that blend dead targets with live links. A high-quality backlink checker API should process queries in real time while maintaining predictable row-level fees.

This article bypasses basic marketing copy to deliver raw database facts. Selecting a programmatic data pipeline saves months of crawling infrastructure construction.

Key Takeaways

Recommended API Provider	Primary Strength	Index Size (Live Links)	Billing Model
SE Ranking API	Predictable monthly credits for agency rank-tracking and link audits	2.9 Trillion	Subscription Credits + Pay-As-You-Go Packs
DataForSEO API	Pure pay-as-you-go billing with a simple $100 monthly minimum.	2 Trillion	Pay-As-You-Go
Moz API	Page Authority, Domain Authority, and Spam Score delivery.	45.5 Trillion	Tiered Subscriptions
SEO PowerSuite API	Incredibly low cost per million rows for high-volume tools.	3.5 Trillion	Flat-Rate Units
Ahrefs API	Cleanest, most active live link index on the market.	35 Trillion	Enterprise Commitment

Analyzing the programmatic link data market reveals several structural trends:

• First, the industry-leading crawling indexes have split into distinct pricing models. Enterprise providers lock raw database pipelines behind massive five-figure yearly commitments, which basically shuts out early-stage development teams. Meanwhile, infrastructure-first providers offer pure pay-as-you-go access that bills only for the exact rows returned.
• Second, data hygiene varies wildly across indexes. Some crawlers keep dead links in their main search indexes for years, which artificially inflates domain authority scores and leads to inaccurate reporting. Developers must determine if a backlink API provider filters out lost links before querying.
• Third, a programmatic setup should use a bulk backlink analysis API to compress HTTP overhead. Standardizing connections on batching endpoints saves computational power and prevents rate-limiting issues.

So, what are the best backlinks research APIs? Let's discuss!

Best Backlinks API #1. SE Ranking API

SE Ranking provides a structured programmatic connection that pulls directly from a database of over 2.9 trillion links. The system uses a credit-based billing system. It retrieves deep domain authority metrics, referring IPs, subnets, and anchor text tables. Developers needing a clean backlink API can retrieve extended profiles containing referring domains, subnets, and IPs. The main endpoints allow batch processing of up to 100 targets per individual POST request.

Key features:

• Domain Trust Score: A proprietary metric tracking domain link authority.
• Batch Targeting: Supports querying up to 100 domains in one call.
• New/Lost Backlink Monitor: Identifies link profile shifts over historical intervals.
• Detailed TLD Breakdown: Returns top-level domain percentage tables.

Pricing

API access is included in the Core ($129/mo or $103.20/mo billed annually) and Growth ($279/mo or $223.20/mo billed annually) plans. The Core plan includes 25,000 credits, and the Growth plan includes 100,000 credits per month. Standalone API plans cost $318/month (billed annually at $3,816 upfront) for 24 million credits per year. Overage credits are sold in pay-as-you-go packs starting at $50 for 250,000 credits.

Metric/Endpoint	Cost in Credits	Pay-As-You-Go Pack Price	Included Credits (Growth Plan)
Standard Target Lookup	100 credits per domain	$50 / 250k credits	100,000 credits/month
Link Row Retrieval	1 credit per row	$50 / 250k credits	100,000 credits/month
Project API Usage	Draws on existing limits	N/A	Draws on plan limits

Best For

Growing agencies handling 20 to 50 local client sites that need programmatic rank tracking and link audit metrics packaged together under a single, non-enterprise budget.

Pros

• Excellent pagination and export options.
• Unused pay-as-you-go credit packs do not expire, allowing developers to pay only for exact high-volume runs without ongoing overage fees.
• Massive 2.7T backlink index.
• 420M domains indexed daily.
• 6B pages crawled daily.
• The setup cost is significantly lower than Semrush or Ahrefs.
• The API supports batch targets, which helps reduce connection overhead.
• API is included in all plans.
• Solid historical tracking.

Cons

• The base credit allocations on the entry tiers run out quickly when running detailed crawls.
• Translating the raw JSON payload into white-label client PDFs requires writing a custom reporting parser.

Best Backlinks API #2. DataForSEO API

DataForSEO operates as a pure data infrastructure provider. Their platform maintains a continuously updated index of 2 trillion live backlinks, delivering real-time JSON payloads. The turnaround time for live requests averages under two seconds. This setup represents a robust backlink checker API for developers who require raw, unformatted link histories without managing proxies or headless browsers.

Key features:

• Real-Time LIVE Processing: Delivers non-cached backlink profiles instantly.
• No-Code Connectors: Standard pipelines for Google Sheets, Make.com, n8n, and Airtable.
• Deep Historical Indexes: Retrieves link histories and referring domains dating back to 2019.
• Granular Filter Arrays: Allows sorting response rows by page authority, anchor text, or link status.

Pricing

DataForSEO runs a pay-as-you-go pricing structure with a $100 minimum monthly commitment. Every request costs $0.02, and each retrieved data row costs $0.00003. This pricing model allows developers to analyze roughly 660,000 targets or backlinks on a standard $100 balance.

Request Volume	Rows Requested	Fixed Cost	Per-Row Cost	Total Cost
1 Request	1	$0.02	$0.00003	$0.02003
1 Request	1,000	$0.02	$0.03000	$0.05000
100 Requests	100,000	$2.00	$3.00000	$5.00000
1,000 Requests	1,000,000	$20.00	$30.00000	$50.00000

Best For

SaaS companies and programmatic SEO platforms that require millions of rows of search engine data without paying massive subscription retainers.

Pros

• The pay-as-you-go credits never expire and remain active until used.
• There are no rigid bundles, meaning developers have complete control over their exact consumption.
• Standard query response times are incredibly fast.

Cons

• The platform does not provide a visual web dashboard, which means non-technical team members cannot run simple checks without developer help.
• Estimating exact budgets can be difficult for platforms with fluctuating traffic.
• The backlink endpoints and LLM Mentions API require separate, independent top-up subscriptions.

Best Backlinks API #3. Majestic API

Majestic maintains one of the most established link databases on the web. They run two separate indexes: the Fresh Index, updated daily, and the Historic Index, containing trillions of links since 2006. When analyzing link quality over a long duration, Majestic's backlinks API remains a reliable solution. Security analysts often rate it as the best backlinks API for tracking spam footprints and toxic link history.

Key features:

• Trust Flow and Citation Flow: Proprietary 0-100 metrics analyzing link trustworthiness and volume.
• Topical Trust Flow: Evaluates website authority across 800+ directory categories.
• Clique Hunter: Programmatic endpoint identifying joint referring domains across competitors.
• Historical Link Graph: Maps visual link relationships between pointing domains.

Pricing

The basic Lite ($49.99/mo) and Pro ($99.99/mo) subscriptions do not include raw API keys. Raw API access starts at $399.99/month, which includes 100 million analysis units. Annual commitments lower the cost to an equivalent of $333.33/month.

Plan Tier	Monthly Price	Annual Monthly Equiv.	Analysis Units	Included Users
Lite (No API)	$49.99	$41.67	5 Million	1
Pro (No API)	$99.99	$83.33	20 Million	1
Full API	$399.99	$333.33	100 Million	5
Full API L	$799.99	$666.66	300 Million	10
Full API XL	$1,599.99	$1,333.33	1 Billion	20

Best For

Enterprise link prospecting tools and domain traders who need detailed historical authority data.

Pros

• The Historic Index covers a massive decade-long link archive.
• The Topical Trust Flow metrics are exceptionally accurate for categorizing target domains.
• The programmatic pricing is far more affordable than Ahrefs' enterprise plan.

Cons

• The platform's entry price of $399.99/month is steep for smaller developers.
• The database lacks broader search features like keyword volume or localized rank tracking.
• The technical documentation is structured around older XML patterns.

Best Backlinks API #4. SEOptimer API

SEOptimer provides programmatic audit and white-label reporting pipelines. Instead of supplying raw lists of trillions of links, its engine focuses on producing complete website health and optimization reviews. This platform functions as a specialized SEO backlink extractor API for front-facing applications.

Key features:

• White-Label PDF Audits: Programmatically generates branded reviews in 15 languages.
• Lead Generation Forms: Embeddable audit widget triggers instant API queries.
• On-Page Crawler: Scans site metadata, performance speed, and search indexing signals.
• Backlink Research API: Extracts target metrics including referring IP totals.

Pricing

Programmatic connections are sold via Bulk Reporting + API packages. The BR-API-1 plan costs $100/month for 500 audits. The BR-API-2 plan runs $250/month for 2,500 audits. The BR-API-3 plan costs $500/month for 10,000 audits. Annual billing cuts entry prices to $75/month.

API Plan	Monthly Price	Annual Monthly Equiv.	Audits Per Month	Cost Per Audit
BR-API-1	$100	$75	500	$0.20
BR-API-2	$250	$187.50 (Est)	2,500	$0.10
BR-API-3	$500	$375.00 (Est)	10,000	$0.05

Best For

Marketing consultancies and agency sales teams that want to automate branded audit reports to capture warm client leads.

Pros

• The PDF generation engine handles complex styling automatically.
• The embeddable widget simplifies client lead capture workflows.
• The setup costs are highly affordable.

Cons

• The backlink database is smaller than the indexes of specialized crawling giants.
• The API is not designed for scrAPIng raw, high-volume search results.
• It focuses more on high-level reviews than granular link-graph database analysis.

Best Backlinks API #5. Morningscore API

Morningscore is a gamified SEO platform that undercuts traditional search suites. It tracks keyword positions, site health, and link authority programmatically. Its API is built around simplicity, providing clean metrics without deep filtering systems. For teams that require an easy-to-deploy SEO backlink extractor API to fetch essential link statistics, Morningscore is an attractive alternative.

Key features:

• Linkscore Calculation: Quickly scores the raw power of any domain link profile.
• Target Domain Backlinks: Fetches a clean array of top referring domains.
• New/Lost Link Engine: Tracks target link additions and removals.
• AI Diagnostics: Leverages AI algorithms to suggest automated site health fixes.

Pricing

Pricing is determined by the scale of websites and tracked keywords. The Lite plan costs $69/month for 3 websites and 100 keywords. The Business plan costs $99/month for 10 websites and 500 keywords. The Pro plan costs $159/month for 30 websites and 2,000 keywords. The Premium plan costs $299/month for 100 websites and 5,000 keywords.

Plan Level	Monthly Price	Project Limit	Keyword Limit	API Rate Limit
Lite	$69	3	100	2 requests/sec
Business	$99	10	500	2 requests/sec
Pro	$159	30	2,000	2 requests/sec
Premium	$299	100	5,000	2 requests/sec

Best For

Freelance SEOs and startup developers who want simple dashboards and basic reporting setups on a modest budget.

Pros

• The gamified dashboard is highly approachable for non-technical clients.
• Standard pricing is significantly cheaper than Ahrefs.
• It combines critical technical site health metrics with basic backlink crawls.

Cons

• The backlink crawl database is thinner for rare or highly obscure target URLs.
• The raw API capabilities are highly capped.
• The platform offers very limited filtering options compared to enterprise alternatives.

Best Backlinks API #6. Moz API

Moz operates a massive database of 45.5 trillion links across 1 billion domains. Their v2 API delivers industry-standard authority metrics, keyword analytics, search intent, and spam scores. This tool provides a reliable backlink API that fits easily into standard reporting dashboards. For companies that need standardized trust scores, Moz remains the best backlink API for reporting Domain Authority to enterprise clients.

Key features:

• Domain Authority & Page Authority: Industry-standard 1-100 metrics predicting search viability.
• Spam Score: Calculates the percentage of low-quality links pointing to a target site.
• Link Intersect: Programmatically returns competitors' referring sources that don't link to you.
• Brand Authority: Evaluates a target domain's baseline visibility in organic search.

Pricing

Moz offers a limited free tier allowing 1 request every 10 seconds, up to 50 rows per month. The Starter tier scales from $20/month (3,000 rows) to $75/month (15,000 rows, with overages at $5 per 1,000 rows). The Growth tier scales from $125/month (50,000 rows) to $500/month (500,000 rows). Advanced plans start at $2,000/month for 4 million rows.

API Tier	Monthly Price	Included Monthly Rows	Overage Rate	Beta Bonus Rows
Free	$0	50	Not Available	None
Starter Medium	$20	3,000	Not Available	+150
Starter Large	$75	15,000	$5 / 1,000 rows	+750
Growth Small	$125	50,000	$25 / 10,000 rows	+3,500
Growth Medium	$250	120,000	$20 / 10,000 rows	+8,400
Growth Large	$500	500,000	$10 / 10,000 rows	+35,000
Advanced	$2,000	4 Million	$5 / 10,000 rows	+400,000
Enterprise	$10,000	40 Million	$3.50 / 10,000 rows	+4 Million

Best For

Startups, marketing platforms, and software engineers who need reliable, scalable authority and trust metrics.

Pros

• The low $20/month starting cost is perfect for testing product concepts.
• It provides direct access to Domain Authority and Spam Score endpoints.
• The programmatic data structures are stable and well-documented.

Cons

• Weighted endpoints deduct multiple rows from your monthly quota for a single call.
• Overages on the Starter and Growth tiers can get expensive if usage spikes.
• Search results do not update as rAPIdly as some live alternatives.

Best Backlinks API #7. Serpstat API

Serpstat is a versatile SEO suite designed for programmatic efficiency. Its database tracks 1 trillion links and 7.11 billion keywords globally. Developers seeking a programmatic SEO backlink API can retrieve raw lists of backlink sources. The API is highly scalable, serving as an efficient bulk backlink analysis API that handles extensive competitor analysis workflows.

Key features:

• Semantic Gaps & Competitor Analysis: Maps out keyword and link disparities.
• Technical Site Diagnosis: Programmatically reviews site health and generates audit logs.
• Rollover Credits: Keeps unused programmatic credits active by rolling them to the next month.
• POST and GET Queues: Supports queue-based tasks with fast, real-time response options.

Pricing

Serpstat bundles basic API access into its Team subscription plan, which costs $129/month ($99/mo on annual plans). For dedicated programmatic tasks, a separate contract starts at $180 per 1 million rows of data. At larger volumes, this rate drops to $100 per million rows. Unused programmatic credits roll over to the next billing period, and errors or empty results do not consume credits.

API Option	Pricing Model	Speed / Limits	Features Included
Team Plan	$129/mo ($99/mo annual)	Included platform limits	API access + standard tools
Dedicated API (Low Vol)	$180 per 1 Million Rows	10 requests/sec	Credit rollover, no charge for errors
Dedicated API (High Vol)	$100 per 1 Million Rows	10 requests/sec	Custom documentation, data reselling

Best For

Boutique agencies managing between 30 and 80 client projects, and developers wanting rollover credits.

Pros

• Unused credits roll over to the next month, minimizing wasted spend.
• Does not bill for error codes or requests that return empty payloads.
• Fast response times with a rate limit of 10 requests per second.

Cons

• The link database is smaller than the indexes of Ahrefs or Semrush.
• Support options are basic unless you pay for top-tier agency packages.
• Complex queries require some parsing work on the developer's end.

Best Backlinks API #8. Ahrefs API

Ahrefs is widely regarded as the gold standard for live backlink data. Their database spans 35 trillion links, updated constantly by an active web crawler. Developers using Ahrefs' backlink analysis API get highly accurate data points.

Key features:

• Live-Only Backlink Database: Continually checks and filters out dead links for accuracy.
• SERP Overview Method: Pulls the top 100 search results for any queried term.
• Advanced Unit Filtering: Filter results by location, language, device, and search features.
• cURL Command Generator: Instantly converts manual reports into API query paths.

Pricing

Ahrefs locks programmatic API access behind its Enterprise plan. This plan costs $1,499/month on an annual commitment, which totals $14,990 upfront. The plan includes 2 million integration units per month. Additional units can be purchased as add-ons, but these expire after 3 billing months if left unused. Queries are metered, with a minimum cost of 50 units per request depending on complexity.

Plan Tier	Monthly Price	Included Monthly Units	Overage Unit Rollover	Historical Access
Lite	$129	10,000	Not Available	Limited
Standard	$249	150,000	Not Available	Limited
Advanced	$449	500,000	Not Available	Limited
Enterprise	$1,499	2 Million	3 Months Expiry	5 Years

Best For

Highly-funded tech startups, enterprise companies, and commercial software products that require the absolute cleanest link data.

Pros

• Unmatched data precision with real-time live link tracking.
• Deep historical metrics dating back five years are included.
• High data volume reliability with rare API downtime.

Cons

• Prohibitively expensive starting cost of $14,990 annually.
• Unused credits do not roll over, and extra units expire after 3 months.
• Strict rate limits require complex programmatic resource scheduling.

Best Backlinks API #9. Semrush API

Semrush is a major player in the marketing suite sector. It claims an enormous index of 43 trillion backlinks, though independent tests suggest this includes a large amount of historic or dead links. Choosing Semrush as your backlink API provider unlocks massive analytical layers. When connecting to their backlink data API, developers pull direct CSV summaries containing IP classes and subnets.

Key features:

• Clickstream Traffic Analytics: Provides estimated visits, bounce rates, and traffic sources.
• Backlink Overview Endpoint: Simple programmatic overview for a flat cost of 40 units per query.
• Keyword Gap Engine: Evaluates keyword overlaps across up to five competing domains.
• Display Limit Parameter: Allows developers to cap row responses to optimize unit consumption.

Pricing

Semrush API access is restricted to the Business subscription plan, which costs $499.95/month ($416.66/month billed annually). This base subscription does not include API credits, which must be purchased separately. API units are priced at $2,000 per 1 million credits. A standard backlink overview query costs 40 units, while detailed reports charge a variable fee per line of data returned.

API Parameter / Plan	Cost / Base Plan	Overage Unit Cost	Included API Units
Business Subscription	$499.95/month	N/A	Variable
Standard API Unit Purchase	$2,000 per 1 Million units	Variable	Pay-as-you-go
Backlinks Overview Query	40 units per request	Draws from balance	N/A
Traffic Summary Endpoint	1 unit per returned line	Draws from balance	N/A

Best For

Enterprise marketing divisions and agency teams that need programmatic access to keyword, PPC, and clickstream traffic data in one system.

Pros

• Incredibly broad dataset covering organic search, paid ads, and traffic metrics.
• High-volume target matching with up to 200 domains per POST request.
• Data is highly reliable across global search regions.

Cons

• High barrier to entry makes it unviable for smaller developers.
• Standard index includes dead links, which can inflate backlink counts.
• Rigid unit structures can result in high, unexpected overage charges.

Best Backlinks API #10. SEO PowerSuite API

SEO PowerSuite's Backlink API is a prominent option for programmatic buyers. Relying on a crawl engine that processes 5 million pages per minute, its database contains 3.5 trillion live links across 264 million domains. This makes it an incredibly strong backlink checker API for developers seeking clean link footprints.

Key features:

• Live-Only Backlink Filter: Excludes dead links from its crawl results to ensure high data hygiene.
• REST Structure: Standard, clean REST API that can be deployed in a matter of days.
• Google Sheets Connector: Easy connection using basic IMPORTXML parameters.
• InLink Authority Rank: Proprietary algorithm calculating page-level link weight.

Pricing

SEO PowerSuite offers straightforward flat-rate pricing designed for high volume. The entry plan costs $149/month for 5 million units. The mid-tier plan costs $349/month for 20 million units. The largest plan costs $899/month for 100 million units. On the 5 million plan, the cost per million rows is roughly $29.80, making it up to 16 times cheaper than Moz.

Monthly Units	Price Per Month	Price Per 1 Million Units	Comparison vs. Moz Cost
5 Million	$149	$29.80	~16x cheaper
20 Million	$349	$17.45	~28x cheaper (Est)
100 Million	$899	$8.99	~55x cheaper (Est)

Best For

SaaS developers, programmatic SEO builders, and growing agencies that need high volumes of live link data on a budget.

Pros

• Incredibly cheap pricing, costing a fraction of what Moz or Ahrefs charges.
• Live-only crawling means your data is not cluttered with dead links.
• Extremely simple REST setup with clean JSON or XML outputs.

Cons

• It is a pure developer API; it lacks a built-in web dashboard.
• Basic support options compared to major enterprise platforms.
• Documentation is lightweight and requires some trial-and-error to implement.

FAQ

What are weighted endpoints and how do they count towards my API row quota?

Weighted endpoints represent specialized search API tasks that consume more resources than standard data requests. Some providers apply a multiplier to these endpoints, meaning a single request can consume multiple units or rows from your monthly balance. For instance, executing a link intersect lookup might return only a few lines, but the provider may charge it as five or ten rows consumed in your monthly metrics. Developers should inspect the documentation to see if specialized endpoints carry multipliers.

Why does the distinction between live-only and historical indexes matter for software builds?

Crawlers that track both live and dead links often display highly inflated backlink profiles. If a website loses a backlink but the API provider fails to recrawl and update that status, your software will report inaccurate data to users. Live-only indexes actively check target sites and remove lost backlinks immediately. This programmatic cleaning prevents reporting broken redirects, which ensures higher data hygiene inside custom dashboards.

How can developers integrate raw backlink API endpoints directly into spreadsheet reports?

Most REST APIs support simple data formats like XML or JSON. Developers can use standard spreadsheet import functions such as IMPORTXML or IMPORTDATA to execute API calls directly from a cell. By constructing a query URL containing the API target, the API key, and the requested metrics, the spreadsheet will automatically populate the target rows with raw search data. This approach allows non-technical team members to run quick audits without custom software interfaces.

Conclusion

Selecting the right programmatic link data engine depends entirely on your target software requirements and development budget:

• If you need the tool that offers the best ratio of price/value, SE Ranking offers a top-notch API along with AI visibility tracking features.
• If your application requires the absolute cleanest live backlink tracking and your organization can justify a five-figure annual commitment, Ahrefs represents the premier standard.
• For larger agency operations that need access to organic keywords, paid ads, and clickstream traffic summaries in a single coordinate pipeline, Semrush provides a highly functional platform.
• DataForSEO is highly scalable for raw data mining, offering a pure pay-as-you-go billing structure with no annual commitments.
• If your platform needs to process millions of link rows with high data hygiene, SEO PowerSuite is a massive dark horse that delivers live indexes at a fraction of the cost of legacy suites.

Teams focused on cost efficiency and programmatic builds should look at alternative options. Be sure to test the API performance during a trial phase to verify connection latency and documentation support before making a subscription decision.