Marketing·Standings

Compare SEO APIs

SEO APIs provide data about search results, keywords, backlinks and domains through an application programming interface (API), a way for software to request data from another service. This board covers tools for getting that information.

Compare the data categories, pricing, rate limits and API format to see whether a tool fits your needs. The signal score is out of 10; marks show whether a tool has an API, open-source code or a free tier.

• 27 platforms
• 13 with a public API on this page
• 12 with a free tier
• Checked 23 Sept 2026

1. #PlatformSignalPlugs inPrice
2. 1
   SP

   SEO PowerSuitelink-assistant.com

   SEO tool available through an API and on Linux, macOS, and Windows.

   7.8 APIOpenFree Free tier · from $349/yr
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3. 2
   A

   Ahrefsahrefs.com
   7.5 APIOpenFree Free tier · from $29/mo
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4. 3
   S

   SpyFuspyfu.com

   SEO tool for exploring search terms and monitoring where sites appear.

   7.5 APIOpenFree Free tier · from $29/mo
   →
5. 4
   GS

   Google Search Consolesearch.google.com

   Free SEO service with API access for keyword research, rankings, site audits and backlinks.

   7.5 APIOpenFree Free tier
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6. 5
   S

   Semrushsemrush.com
   7.3 APIOpenFree Free tier · from $10/mo
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7. 6
   KT

   Keyword Toolkeywordtool.io

   Keyword and competitor research service with API access and a free plan; paid from $68/mo.

   7.3 APIOpenFree Free tier · from $68/mo
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8. 7
   S

   Serpstatserpstat.com

   SEO API with keyword research features.

   6.8 APIOpenFree Free tier · from $50/mo
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9. 8
   B

   BrightEdgebrightedge.com

   SEO software for keyword research and rank tracking, with web and API access; pricing on request.

   6.4 APIOpenFree —
   →
10. 9
    M

    Majesticmajestic.com

    API-based SEO service with keyword research and rank tracking, with a free plan.

    6.3 APIOpenFree Free tier
    →
11. 10
    KC

    Keyword.comkeyword.com

    API-only keyword research service with a 14-day trial, from $3/mo on annual billing.

    6.0 APIOpenFree From $3/mo
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12. 11
    N

    Newintervalnewinterval.com

    API-only SEO service for keyword research and rank tracking, from $20/mo.

    5.9 APIOpenFree From $20/mo
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13. 12
    SR

    SE Rankingseranking.com

    Paid API for tracking keyword positions and researching search terms.

    5.9 APIOpenFree From $129/mo
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14. 13
    L

    LinkResearchToolslinkresearchtools.com

    Backlink analysis service with web and extension access, from $599/mo and a 7-day trial.

    5.8 APIOpenFree From $17/mo
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15. 14
    S

    seofetchseofetch.com

    API that returns parsed search results, keyword metrics, backlink details, and site analysis.

    5.8 APIOpenFree Free tier
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16. 15
    KD

    Keyword Discoverykeyworddiscovery.com

    Keyword research service with historical trends, competitor data and regional databases; free plan, from $49.95/mo.

    5.8 APIOpenFree Free tier · from $500/yr
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17. 16
    SA

    Semust APIsemust.com

    Marketing and SEO platform with SERP and keyword APIs, free plan, and paid plans from $19/mo.

    5.8 APIOpenFree Free tier · from $19/mo
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18. 17
    S

    SISTRIXsistrix.com

    SISTRIX provides software and data for analysing visibility on Google, AI search platforms, and Amazon.

    5.7 APIOpenFree From €119/mo
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19. 18
    D

    DatacircleDatacircle

    Free web directory benchmarking GTM APIs, with downloadable JSON or CSV data and no account.

    5.7 APIOpenFree Free tier
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20. 19
    DS

    DataForSEO SERP APIdataforseo.com

    Search results data service with web and API access, a free trial and usage from $0.00.

    5.6 APIOpenFree —
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21. 20
    G

    GeoRankergeoranker.com

    Search data platform with local visibility, competitor analysis and SEO tools; from $99/mo.

    5.6 APIOpenFree From $99/mo
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22. 21
    S

    SEOmonitorseomonitor.com

    SEO and AI Search tracking platform measuring performance on the same keyword strategy.

    5.6 APIOpenFree From €25/mo
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23. 22
    RA

    Ranked AI APIranked.ai

    SEO and AI visibility platform tracking Google and AI service results, from $4.99/mo with trial.

    5.5 APIOpenFree From $99/mo
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24. 23
    DL

    DataForSEO Labs APIdataforseo.com

    SEO analytics API for keywords, competitors, markets, historical SERPs and app stores from $0.02.

    5.2 APIOpenFree —
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25. 24
    BS

    backlinks.shbacklinks.sh

    Backlink API for domain data, with up to 10,000 referring domains per call; from $10.

    4.9 APIOpenFree —
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26. 25
    SA

    SEO APIseo-api.com

    REST API for SERPs, backlinks, audits, speed, accessibility and over 100 SEO metrics.

    4.7 APIOpenFree —
    →

Places #1, #2, #3, #4, #5 on this board are open to sponsors. Take #1 · Other ways to advertise

How to choose

Match the data to your task

Compare the listed data areas: rankings, backlinks, keywords, domains and historical data. Choose based on the information your work needs, rather than the API label alone.

Check the full cost

Look at whether a tool has a free plan, a free trial or a paid starting price. A free plan and a free trial are different: check the pricing details to understand what access is offered.

Review limits and format

Compare rate limits, which set how often software can request data, and API format, which affects how another service can read the response. These details matter when connecting an API to software you already use.

Check access and platform

The board marks API availability, open-source code and a free tier. It also lists platforms such as web, extensions and desktop systems. Check the individual tool details for the access and platform you need.

Questions

What is an SEO API?

It lets software request SEO-related data, such as rankings, backlinks, keywords or domain information, from a service.

What data should I compare?

Compare rankings, backlink, keyword, domain and historical data against the information your work requires.

What does the signal score mean?

It is a score out of 10 based on maker-published information about usage, public API access, documentation, open-source code and a free tier.

Is a free trial the same as a free plan?

No. A free plan provides an ongoing free option; a free trial provides temporary access. Check the provider's terms for details.

What are rate limits?

Rate limits set how often software can request information from an API. Compare them with your expected use.

Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure