Best SEO APIs in 2026: Top SEO API Tools Compared

Best SEO APIs in 2026: Top SEO API Tools Compared

20 May 2026
Ruben Rogers in Digital Marketing

Choosing the right SEO API depends on what you want to build.

Some teams need keyword ranking data. Others need backlink metrics, SERP results, technical SEO checks, or automated website audits.

And for agencies, the best SEO API is often the one that can turn data into clear, client-ready reports.

An SEO API lets you pull search data directly into your own tools, dashboards, reports, or workflows.

In this guide, we compare the best SEO API tools for different use cases.

We’ll also look at what each API is best suited for, so you can choose the right option for whatever you’re building.

What is an SEO API?

An SEO API (Application Programming Interface) allows developers to pull search engine optimization data directly from a provider's database into their own applications.

Instead of logging into a platform to check keyword rankings or run a site audit manually, an API lets your software request that data programmatically.

For instance, teams can use an SEO ranking API to track thousands of queries automatically, monitor competitors across different geographic locations, and feed data into business intelligence workflows.

Whether you are building a custom client dashboard, a white-label SEO auditing tool, or an internal data warehouse, a website SEO API delivers the raw data you need in a structured format like JSON or XML.

The Best SEO APIs

Here is a detailed breakdown of the top SEO APIs available today.

1. SEOptimer SEO API

SEOptimer’s SEO Audit API is built for teams that want to automate website audits, generate SEO reports, and pull audit data into their own tools or workflows.

Instead of manually running one website audit at a time, you can use the API to submit URLs, retrieve SEO data, get audit scores, and generate white-label PDF reports.

This makes it especially useful for agencies that want to audit prospect websites at scale, create branded reports, or connect SEO audit data to their sales and reporting processes.

SEOptimer is not just a raw SEO data API. It is designed around practical website audit and reporting workflows, making it a great choice for agencies, developers, and SaaS teams that need structured SEO analysis.

Key Features

SEOptimer’s SEO API includes:

The API can be used to audit hundreds or even thousands of websites, making it a good fit for agencies that want to scale lead generation, prospecting, or client onboarding workflows.

Pricing

SEOptimer’s SEO API is available through the Bulk Reporting + API plans:

Annual billing is available at a discounted rate, starting from $75/month when billed annually.

All plans include SEO API access, bulk reporting, white-label report generation, and access to SEOptimer MCP using the same API key.

Pros

Cons

SEOptimer is one of the best SEO API tools for agencies and teams that need scalable website audits, branded reports, and practical SEO data they can plug into sales, reporting, or client workflows.

2. DataForSEO

DataForSEO is one of the more comprehensive SEO API providers on the market.

Instead of offering one single SEO API, DataForSEO provides a full API stack covering SERP data, keyword data, backlinks, on-page SEO, domain analytics, business listings, merchant data, and more.

This makes it a strong choice for teams building custom SEO software, rank tracking tools, keyword research platforms, competitor analysis dashboards, or internal SEO data systems.

DataForSEO is especially useful if you need access to multiple SEO data sources through one provider.

For example, you could use its SERP API for search result data, its Keywords Data API for keyword research, its Backlinks API for link data, and its OnPage API for website health checks.

That said, DataForSEO is more of a developer-first SEO data provider than a client-reporting tool.

It gives you access to a lot of raw and structured SEO data, but you will usually need to build your own dashboards, reports, and workflows around it.

Key Features

DataForSEO offers a wide range of SEO and digital marketing APIs, including:

This makes DataForSEO one of the broader options in this list, especially for teams that want to combine rank tracking, keyword research, backlink analysis, and SERP data in one data stack.

"For agency and publisher workflows, my default recommendation is DataForSEO. It is flexible, cost-effective and API-first, which makes it easier to build internal dashboards, keyword tools, SERP trackers or client reporting systems without paying for a full enterprise SEO suite.
I especially like it when the goal is to pull keyword, SERP and ranking data into your own workflow."

DataForSEO’s official pricing page also groups its APIs into categories such as search and generative engine optimization, keyword data, backlink data, on-page SEO and website health, and website visibility.

Pricing

DataForSEO uses a pay-as-you-go pricing model, which means you pay for the specific API services you use rather than subscribing to one fixed monthly plan.

According to DataForSEO, pricing is based on individual service consumption, with a minimum payment amount of $50.

Pricing varies by API type, endpoint, search engine, location, request priority, and data volume.

This can make DataForSEO cost-effective for teams with fluctuating usage, but it also means you need to estimate your expected request volume carefully before choosing it.

Pros

Cons

DataForSEO is one of the best SEO API options for developers and SaaS teams that need flexible access to a wide range of SEO data.

It is a good option if you want to build your own rank tracker, keyword research tool, SERP monitoring system, backlink dashboard, or custom SEO platform.

3. Semrush

Semrush offers a broad API ecosystem rather than one simple SEO API.

Its API options cover SEO analytics, project data, traffic and market intelligence, and local SEO data.

The main option for SEO teams is the Semrush SEO API, which can pull data from Semrush reports such as domain analytics, organic search, keyword, and backlink reports.

Semrush also offers a Projects API, which can access Position Tracking and Site Audit campaign data, including technical audit issues and site health information.

This makes Semrush a good choice for companies that already rely on Semrush data and want to bring that data into their own dashboards, BI tools, internal reporting systems, or SEO software.

However, Semrush’s API is more complex than many other options in this list.

Standard API access requires a Business subscription, API units must be purchased separately, and many reports consume units based on the number of rows returned.

Key Features

Semrush’s API ecosystem can support a wide range of SEO and marketing data use cases, including:

The Site Audit API is especially relevant for technical SEO workflows. It lets users automatically crawl websites, identify technical SEO issues, monitor crawl progress, and retrieve structured site health reports.

Semrush also has AI-related API use cases. Its documentation says some Trends API methods include insights into traffic from AI-powered search engines and assistants such as ChatGPT, Gemini, and Copilot.

Pricing

Semrush API pricing is not as straightforward as a fixed monthly API plan.

For the Standard API, Semrush says access is available to users on the SEO Classic Business subscription.

After upgrading to Business, users still need to buy API units before using the API.

Pros

Cons

Semrush is one of the top SEO API options for enterprise teams that need access to large-scale competitive SEO data, keyword data, backlink data, traffic insights, and project-level SEO information.

It will be a good fit if your team already uses Semrush and wants to bring that data into internal dashboards or reporting systems.

4. Ahrefs

Ahrefs API gives users access to data from their Ahrefs workspace so they can build custom integrations, dashboards, automations, and reporting workflows.

The API is especially good at backlink and competitive SEO data, which is what Ahrefs is best known for.

But Ahrefs API v3 also includes endpoints for Site Explorer, Keywords Explorer, SERP Overview, Rank Tracker, Site Audit, Batch Analysis, Brand Radar, Social Media Management, and more.

This makes Ahrefs a great option for teams that already use Ahrefs and want to pull that data into internal tools or client dashboards.

For example, you could use it to retrieve backlink data, organic traffic reports, keyword metrics, SERP results, project health scores, or rank tracking data.

Key Features

Pricing

Ahrefs API is available on eligible paid plans.

Ahrefs says that eligible paid plans include a monthly API unit allowance, and some plans support pay-as-you-go usage for additional units once the included limit is exceeded.

The main paid plans are:

The pricing page also lists API access as a plan feature, with Enterprise including uncapped API access.

API usage is based on units. Most requests consume API units, with the cost depending on the number of rows returned and the fields requested.

Ahrefs states that the minimum cost for any unit-consuming request is 50 units.

Ahrefs also lets users set limits on API keys and pay-as-you-go API usage, which is helpful for controlling costs during development.

Pros

Cons

Ahrefs API is one of the best SEO API options for teams that need backlink intelligence, keyword metrics, SERP data, rank tracking data, and competitive SEO insights from Ahrefs.

It is a strong choice for developers and SEO teams building internal dashboards, link analysis tools, competitive research systems, or custom SEO reporting workflows.

5. SE Ranking

SE Ranking offers a broad SEO API with access to keyword research, backlinks, domain analysis, website audits, project data, and AI search visibility.

It is a good option for teams that want to build custom dashboards, automate SEO reporting, or connect SEO data to internal tools, CRMs, and BI platforms.

The API supports structured JSON responses, endpoint examples, and Postman collections. SE Ranking also includes API access in every plan, with the option to buy API access separately.

Key Features

SE Ranking’s API includes:

"As an agency owner, I personally use SE Ranking and also guide my team to work with it because it combines multiple SEO and marketing data points into a single platform instead of forcing agencies to manage several disconnected tools.
For agencies managing multiple clients, having all of this accessible through one ecosystem significantly improves workflow efficiency."

Pricing

Pros

Cons

SE Ranking is an all-in-one SEO API for teams that need access to several SEO datasets from one platform.

6. SerpApi

SerpApi is a search results API provider. It is not a full SEO audit API, but it is useful for teams that need to collect and analyze live search engine results.

For SEO use cases, SerpApi is most useful when you need to pull Google rankings, SERP features, local results, maps data, shopping results, or AI Overview data into your own tools.

This makes it a good fit for rank tracking tools, SERP monitoring dashboards, local SEO software, and GEO tracking workflows.

SerpApi’s Google Search API lets users scrape Google search results and return structured data. It supports standard Google queries, including advanced search operators such as site:, inurl:, and intitle:.

For GEO use cases, SerpApi is also relevant because it can extract Google AI Overview results. SerpApi says its Google AI Overview API can scrape results from the AI Overview block in Google search results.

Key Features

SerpApi offers several APIs that are relevant to SEO and GEO workflows, including:

For SEO teams, the main value is access to live SERP data.

You can use it to track where pages rank, monitor SERP features, analyze competitors, collect People Also Ask data, review local results, or check whether AI Overviews appear for target queries.

"In my view, SerpApi stands out as one of the most compelling SEO APIs today due to its focus on real-time data and broad search coverage. Unlike many SEO APIs that rely on quickly outdated datasets, SerpApi delivers live results, reflecting exactly what users see as search shifts rapidly."

For GEO teams, the most relevant feature is the ability to extract AI Overview results and citations. SerpApi notes that AI Overview blocks are currently limited to English searches and a limited range of countries.

Pricing

SerpApi uses monthly plans based on the number of searches included.

Current pricing includes:

SerpApi’s pricing page also lists hourly throughput limits for each plan, such as 200 searches per hour on Starter, 1,000 on Developer, 3,000 on Production, and 6,000 on Big Data.

Pros

Cons

SerpApi is another good choice if you need a SERP API for SEO ranking, local SEO, competitor monitoring, or GEO tracking.

It is especially useful for teams that want to monitor search results, track SERP features, or collect Google AI Overview data.

7. Morningscore

Morningscore offers an all-in-one SEO API with access to keyword rankings, backlinks, onsite health data, and selected AI SEO features.

It is a good option for teams that want a more affordable SEO API without needing a large enterprise subscription.

The API can be used to pull ranking data, link data, technical SEO health data, and overall SEO metrics into dashboards, reports, or internal tools.

Morningscore is also more accessible than some enterprise API providers, with pricing starting at a lower monthly cost.

Key Features

Morningscore’s SEO API includes:

Morningscore’s onsite API scans for issues such as missing image alt tags, long title tags, large images, slow page speed, and other technical SEO problems. Its backlink data includes top linking domains and backlink information, with link data provided by Moz.

Pricing

Morningscore’s API pricing starts at $69/month and is included across its main plans.

Current pricing includes:

Each plan includes access to API data, with limits based on websites, tracked keywords, health crawl limits, and AI credits. Morningscore also states that every plan has a rate limit of 2 requests per second.

Pros

Cons

Morningscore is a good SEO API option for smaller teams that want affordable access to keyword, backlink, onsite, and AI-related SEO data.

It is especially useful if you want a lower-cost API for dashboards, internal tools, or lightweight reporting workflows.

8. Majestic SEO

Majestic API gives users programmatic access to Majestic’s backlink database.

Majestic is mainly known for link intelligence. That means it is useful for backlink analysis, competitor link research, link-building tools, domain scoring, and SEO reporting systems that need backlink data.

Majestic is also best known for its proprietary link metrics, including Trust Flow, Citation Flow, and Topical Trust Flow. These metrics help users assess backlink quality, link quantity, and topical relevance.

Unlike broader SEO APIs, Majestic does not focus on website audits, keyword rank tracking, or white-label SEO reports. Its strength is backlink data.

Key Features

Majestic API includes access to backlink and link intelligence data such as:

Majestic maintains two backlink indexes. The Fresh Index contains more recent backlink data and is updated frequently throughout the day. The Historic Index is used for longer-term backlink analysis and historical link research.

The API works over HTTP and can return responses in XML or JSON. Majestic also provides a development sandbox, so developers can test API access without consuming live subscription resources.

Pricing

Majestic’s full API access is available through its API plan.

Current pricing starts at:

The API plan includes Full API access, 5 users, 100 million analysis units, 20 million retrieval units, and 500,000 index item units.

Majestic also offers Lite and Pro plans, but the pricing page lists API access as “No” for those plans.

Pros

Cons

Majestic API is one of the best options if backlink data is your main priority.

It is especially useful for link-building platforms, backlink analysis tools, competitor research dashboards, and SEO teams that rely on link intelligence metrics.

9. Moz

Moz API gives users access to Moz’s link and authority data.

It is best known for metrics like Domain Authority, Page Authority, and Spam Score, which are commonly used in SEO reporting, link prospecting, competitor analysis, and domain scoring workflows.

Moz API is a good fit if you need to enrich dashboards, spreadsheets, internal tools, or client reports with authority and link metrics. It is also useful for bulk URL analysis, especially when you want to evaluate many domains or pages at once.

However, Moz API is not a full website audit API. It is better suited for off-page SEO analysis, link metrics, and authority scoring than technical SEO audits or white-label report generation.

Key Features

Moz API can be used to access SEO metrics such as:

Moz’s API is often used for link analysis, authority checks, domain scoring, SEO reporting, and building custom SEO tools.

Pricing

Moz API pricing is based on rows of data.

Current publicly listed API pricing includes:

Pros

Cons

Moz API works well for domain scoring, backlink analysis, link prospecting, and SEO reporting tools. It is also one of the more accessible options if you only need basic authority data through an API.

How to Choose the Best SEO API

Selecting the right website rank API depends heavily on your specific product goals, technical capabilities, and budget.

Data Coverage

Ensure the API provides the specific datasets you need.

If you are building a reporting tool, you likely need a mix of keywords, backlinks, and site health metrics. If you only need rank tracking, a specialized SERP scraper might suffice.

Data Accuracy and Freshness

Stale data leads to bad decisions.

Look for providers that offer daily updates for rank tracking and frequent refreshes for search volumes.

Test the API's outputs against your own Google Search Console data to verify accuracy before committing to a long-term contract.

Ease of Integration

Your engineering team will thank you for choosing an API with clean documentation, clear response schemas, and reliable uptime.

Look for RESTful APIs that return data in standard JSON formats.

Reporting Capabilities

If your goal is to present data to end-users, consider how the API structures its outputs.

Some APIs simply dump raw metrics, while others categorize issues and provide actionable insights that you can display directly in your software.

Pricing and Usage Limits

Understand the rate limits and concurrency rules of your chosen provider.

A cheap API is useless if it bottlenecks your application by limiting you to one request per second.

Model your expected data volume and calculate the total cost to ensure it aligns with your budget.

Conclusion

Relying on manual tools to monitor search performance limits your ability to scale.

By integrating a top-tier API, you automate the heavy lifting, ensure data accuracy, and free up your team to focus on executing high-level strategy.

Evaluate your data requirements, compare the pricing models outlined above, and choose the provider that aligns with your business goals. Implement the right technology today, and build a search strategy that drives measurable revenue for your business.