Best Free API Tools in 2026

58 products in API tools that are free to use or with a free plan, according to their makers, ranked by upvotes from the community.

  1. Atlas Cloud

    Atlas Cloud

    The World's First Full-Modal Inference API Platform.

  2. Sidemail

    Sidemail

    All-in-one email platform for SaaS

  3. Routebase

    Routebase

    Your API drifts across several tools. Routebase fixes it.

    1,185views
  4. KushoAI

    KushoAI

    AI Agent to write exhaustive tests for APIs instantly

    1,502views
  5. Meicut

    Meicut

    20+ tools for video, audio & image — batch & collaboration

    767views
  6. Postproxy

    Postproxy

    One API to publish to Instagram, TikTok, Youtube and others

  7. WebCrawler API

    WebCrawler API

    Simplifying Web Data Extraction for AI Applications

  8. Plainly Videos

    Plainly Videos

    Cloud video automation using your After Effects templates.

  9. Requestly

    Requestly

    Local first & Git friendly API client

  10. Stick Audio

    Stick Audio

    Transform Text into Stunning Audio, Text To Speech

  11. Metal Sentinel - Precious Metals API

    Metal Sentinel - Precious Metals API

    Real-time precious metals prices. One API. Zero cost.

    173views
  12. YepCode

    YepCode

    Connect APIs and services in a serverless environment

    2,459views
  13. StreamDocs Online

    StreamDocs Online

    Embed a PDF viewer into your web apps with a few lines of code.

    2,022views
  14. Notion Api Connector

    Notion Api Connector

    Connect and import data from any API to Notion

    1,835views
  15. AhaSend

    AhaSend

    Pay-as-You-Go Transactional Emails, delivered incredibly fast

  16. PDFGate

    PDFGate

    The most powerful HTML to PDF conversion API

  17. t6 IoT

    t6 IoT

    Connect real world object and measure anything from them

    1,536views
  18. MojoAuth Passwordless Authentication

    MojoAuth Passwordless Authentication

    Authenticate users securely without passwords

  19. MailSlurp

    MailSlurp

    Test, build, and automate email and SMS

    1,251views
  20. VisionParser

    VisionParser

    Custom Invoice and Receipt OCR API That Adapts to Your Business

    1,101views

That’s every product in this category, ranked. See the latest launches, or submit your own product.

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Some of the projects I've been working on include: 📱 NotLate – A wellness app designed to help with overthinking and restless nights. 💰 ZapSpend – An expense tracker with receipt scanning, voice input, and CSV/PDF exports. 🚛 Trucker Diary – An iOS app built for truck drivers. 🎵 Duo Vinyl – A digital vinyl turntable experience for music lovers. As a solo developer, one of my biggest challenges isn't just building products. It's getting them discovered, attracting users, and figuring out what actually works after launch. 🌐 https://www.adribyte-studio.com/mobile-apps #IndieHacker #IndieDeveloper #iOSDevelopment #SaaS #Startup

HealthE AI helps you manage fitness and wellness with AI-driven calorie tracking, macro targets, and personalized workout recommendations. It lets you log meals by photo or text, then analyzes nutrition to set your caloric deficit and macronutrients based on goals like fat loss or muscle gain. HealthE AI also tracks hydration, offers a daily feed, and guides setup through a questionnaire so you can follow a focused plan and measure progress clearly. HealthE AI is coming soon!

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ViralCloner Requirements and Installer Steps ViralCloner documentation lists Windows 10/11 (64-bit), at least 4 GB RAM, 500 MB free space, and internet access. Install by running the setup file and following the wizard. https://viralcloner.com/documentation

Put refund information somewhere a customer can find after checkout. The product page can explain the offer; the policy page can keep what happens after a charge and where to get help in one place. This is the current ViralCloner policy page: https://viralcloner.com/refund

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