Your customizable crawling engine for efficient on-page optimization
Customizable
From custom robots.txt and sitemaps, to JS code and raw html – you can adjust our crawler to your requirements with just a few lines of code.
Comprehensive
OnPage API encompasses a variety of on-page metrics, including page speed insights, readability, links and page errors.
Rapid
You won’t have to wait untill the entire website is crawled – OnPage API will gradually return the results in a blink of an eye.
What is DataForSEO On-Page API?
The only API providing real-time on-page SEO data at scale
DataForSEO On-Page API crawls websites and audits pages against 60+ technical SEO metrics, including HTTP status codes, meta tags, internal links, duplicate content, and page speed. It supports JavaScript rendering, custom JS execution, and Google Lighthouse scoring. Pricing starts at $0.000125 per crawled page.
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Built-in SEO benchmarks and performance metrics
Analyze every known on-page ranking factor
Evaluate the performance of any website using 60+ on-page SEO metrics and customizable benchmarks.
Or create your own benchmarks by modifying threshold and setting custom JS rules in the API request.
Check the docs
OnPage Lighthouse API
Get on-page insights straight from Google
DataForSEO lets you leverage Google’s open-source Lighthouse project to measure the quality of web pages and web apps.
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Why hundreds of enterprises choose DataForSEO
Fast delivery
The shortest response time in the industry
Operational resilence
Our APIs are reliable, scalable, and secure by default
24/7 support
Our proactive customer support team is ready to help you anytime
No bureaucracy
You don’t need to sign any contracts and be bound by any conditions
“DataForSEO saves us time, money and resources by eliminating the need to scrape every little thing in-house. This frees up our developers to work on core features that deliver impactful value to our clients. Thanks for creating such a great service!”
Blake Acheson, President at AgencyAnalytics
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Get a free account to test DataForSEO APIs you’re interested in with a real-time playground.
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Cost-efficient solution
for budget-conscious businesses
Real-time results
OnPage API features the fastest turnaround time in the industry
Pay-as-you-go
Add funds to your account and use them for obtaining data
Integration support
Our 24/7 customer support team is with you every step of the way
OnPage API Pricing
Amplify your capabilities with our business solutions
From building innovative SEO software solutions to fostering market research and ecommerce analytics, DataForSEO is made for what you do
Rank Tracker is the primary tool used by website owners and SEO professionals to monitor search engine rankings of website’s pages for specific keywords.
If you’re looking for a reliable solution to build sustainable rank tracking, visit our guide to developing a Rank Tracking tool with DataForSEO APIs.
Backlink analysis tools showcase the backlink profile of any target and provide deep insights into a site’s backlinks, top pages, referring domains, and more.
With DataForSEO Backlinks API, you can speed up the designing stage, and swiftly release a quality Backlink Checker powered by fresh and robust data.
Reputation Management tools help users keep track of online mentions, and monitor customer reviews on various platforms, such as Yelp and Google Business Profile.
Check our development guide and learn how to quickly design and release a robust reputation management software atop two powerful DataForSEO APIs.
Keyword research is one of the most crucial processes in search engine optimization. It helps understand user intent and drive targeted traffic by identifying the queries that people search for.
We’ve prepared a development guide to help you build your own keyword research tool based on the effective use of DataForSEO APIs.
No-code integration with DataForSEO APIs
Easily integrate DataForSEO APIs into your favourite tools without writing a single line of code. With a collection of ready-made connectors and modules you can access high-quality SEO data effortlessly, saving your time and resources.
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Data industry leaders trust
Solutions developers praise
Customer success story
Twinword Wins 35% More Paid Customers After Switching To DataForSEO APIs
"I always recommend DataForSEO. No worries about server capacity, no need for maintenance, and splendid possibilities for rapid development when we want to try something new. Why reinvent the wheel?"
Kono KimConnect on LinkedIn
Customer success story
How DataForSEO Helps Pathfinder SEO Guide its Customers, One Simple Task at a Time
"We found DataForSEO online while we were planning for the beta version of our software. We were impressed by how responsive the team DataForSEO was and by the comprehensive nature of the APIs available."
Lindsay HalseyConnect on LinkedIn
Customer success story
DataForSEO API Helps On the Map Marketing Go Up at the Time of a Downturn
"We have enjoyed working with DataForSEO. We can recommend it to any company that needs SEO related APIs. We have been satisfied with the speed, cost, and accuracy"
Kaspers MilbergsConnect on LinkedIn
"DataForSEO have been great to work with right from the start. They offer a wide range of different APIs and are constantly adding to their offerings. They are always on hand to help with any questions or queries that we have. I would recommend to anyone looking for SEO data."
Kieran Headley Connect on LinkedIn
"DataForSEO has always been in our tool kit. I guess the most simple way to put it is that when you explore a tool's API, you can see what it is really capable of. DataForSEO also provides awesome documentation to utilise.”
Callum SherwoodConnect on LinkedIn
Release in days, not weeks
Integrating a new data source can take a lot of time and money. We accelerate this process by providing a user-friendly interface for controlling your API usage and spending.
DataForSEO offers a detailed documentation for every parameter, field and function you can come across while using our APIs and databases.
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Every DataForSEO user has access to a comprehensive graphic user interface (GUI) and can monitor and control every aspect of data usage.
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Our support team is available 24/7 to ensure you get the required assistance and all your requests are addressed promptly and proficiently.
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Frequently Asked Questions
Does the DataForSEO OnPage API execute JavaScript and render dynamic content?
Yes. The crawler features different levels of execution. You can choose to run a Basic HTML crawl, Enable JavaScript, or Enable Browser Rendering to fetch elements loaded dynamically via JS, AJAX, or modern front-end frameworks like React or Angular.
Can I extract raw textual or structured content from a page instead of a full site audit?
Yes. Beyond a full crawl, DataForSEO OnPage API features Live Instant Pages and Content Parsing endpoints designed to return text, anchors, and structured content from specific URLs instantly.
Is it possible to pause or stop a heavy crawl job once it has started?
Yes. DataForSEO OnPage API features a dedicated Force Stop endpoint. If you realize a crawl task is too large or no longer needed, you can trigger this endpoint to immediately abort the crawling process and minimize your spending.
How can I prevent the DataForSEO OnPage API crawler from crashing my website's server?
You can use custom_robots_txt, start_url, respect_sitemap, and max_crawl_pages parameters in the Task POST endpoint to allow crawling only the section you need. There is also a way to slow down the OnPage crawler – just set the crawl_delay parameter to the desired value (2000 ms by default). The crawler will wait longer between page requests, which can reduce the load on your server.
How do I monitor the progress of a live crawling job?
When fetching results, the API returns a crawl_progress field indicating if the crawl status is in_progress or finished, alongside integers showing the exact number of pages_in_queue and pages_crawled.
Can I prevent accidental overspending on large websites?
Yes. In your DataForSEO user panel, you can set daily expenditure limits for specific APIs or endpoints. If a crawl threatens to exceed your budget, the API stops the process and flags a specific cost-limit error code (40203).