Documents & Productivity APIs let you add documents & productivity capabilities without building from scratch. Every entry below is profiled with trust signals — pricing model, authentication requirements, CORS support, rate limits, and live uptime checks — so you can compare options and pick production-safe choices instead of guessing from a link list.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| Airtable Integrate with Airtable | Freemium | API Key | No | Profile | |
| Airtable Web API API for Airtable bases, tables, records, comments, schema, and automation. | Freemium | API Key | Yes | Profile | |
| Api2Convert Online File Conversion API | Freemium | API Key | No | Profile | |
| Asana Programmatic access to all data in your asana system | Paid | API Key | No | Profile | |
| Asana API Asana API for project management: create tasks, projects, portfolios, goals, and team workflows with rules and custom fields. | Freemium | OAuth | No | Profile | |
| BuildPDF API Convert HTML, images, and text to PDF | Freemium | API Key | Yes | Profile | |
| CV / Resume Parsing API The Resume Parser API parses a resume (CV) file from multiple formats (PDF/DOC/DOCX/TXT/RTF) and returns an extensive object of data points | Freemium | API Key | No | Profile | |
| Cal.com API Cal.com API for scheduling: book meetings, manage availability, connect calendars, and handle round-robin routing with embed support. | Freemium | API Key | No | Profile | |
| ClickUp ClickUp is a robust, cloud-based project management tool for boosting productivity | Freemium | OAuth | No | Profile | |
| Clockify Clockify's REST-based API can be used to push/pull data to/from it & integrate it with other systems | Freemium | API Key | No | Profile | |
| CloudConvert Online file converter for audio, video, document, ebook, archive, image, spreadsheet, presentation | Freemium | API Key | No | Profile | |
| Cloudmersive Document and Data Conversion HTML/URL to PDF/PNG, Office documents to PDF, image conversion | Freemium | API Key | No | Profile | |
| Code::Stats Automatic time tracking for programmers | Free | API Key | No | Profile | |
| Contentful API Contentful API for headless CMS: manage content models, entries, assets, localization, and delivery with GraphQL and REST. | Freemium | API Key | No | Profile | |
| Contentful Content Management API API for managing Contentful spaces, environments, content types, entries, assets, and roles. | Freemium | API Key | Yes | Profile | |
| Convert HTML to PDF API This API converts any HTML (file, url, base64) to a PDF | Freemium | API Key | No | Profile | |
| Convert RSS to JSON Transform raw RSS data into structured JSON | Freemium | API Key | No | Profile | |
| Convert Speech to Text API This API converts any speech to text multiple languages and dialects | Freemium | API Key | No | Profile | |
| Convert Word to PDF Convert a Word document (doc, docx, or ODF formats) to a PDF document | Freemium | API Key | No | Profile | |
| ConvertHub API File Conversion API for Developers - Powerful REST API for file conversion. Convert documents, images, ebooks, and more. Simple integration, dev-friendly pricing. | Freemium | API Key | No | Profile | |
| CraftMyPDF Generate PDF documents from templates with a drop-and-drop editor and a simple API | Freemium | API Key | No | Profile | |
| CustomJS HTML to PDF or PDF to PNG/Text & PDF merging/extraction/merging APIs | Freemium | API Key | No | Profile | |
| DocStruct API AI extraction of invoices, receipts, bank statements & contracts into structured JSON/CSV | Freemium | API Key | Yes | Profile | |
| FastApi Simple Calculator Math, Stadistics, Conversions, Currency and more | Free | No | No | Profile | |
| File Conversions API APIs to handle all your file transformations. Word to PDF, Markdown to HTML, CSV to JSON, audio and many more | Freemium | API Key | No | Profile | |
| Flowdash Automate business workflows | Freemium | API Key | Yes | Profile | |
| Formapi API v1 API DocSpring is a service that helps you fill out and sign PDF templates. | Unknown | Unknown | Yes | Profile | |
| Google Docs API to read, write, and format Google Docs documents | Freemium | OAuth | No | Profile | |
| Google Keep API to read, write, and format Google Keep notes | Freemium | OAuth | No | Profile | |
| Google Sheets API to read, write, and format Google Sheets data | Freemium | OAuth | No | Profile | |
| Google Slides API to read, write, and format Google Slides presentations | Freemium | OAuth | No | Profile | |
| Grammarly API Grammarly API: grammar and spell checking, writing tone analysis, plagiarism detection, and style suggestions. | Freemium | API Key | Yes | Profile | |
| Greenwire Public API Greenpeace Greenwire allows you connect with other volunteers, activists and groups working on environmental campaigns all across the world! | Unknown | Unknown | Yes | Profile | |
| Html2PDF HTML/URL to PDF | Freemium | API Key | No | Profile | |
| JIRA JIRA is a proprietary issue tracking product that allows bug tracking and agile project management | Freemium | OAuth | No | Profile | |
| Linear API Linear API for issue tracking: manage projects, issues, cycles, teams, and product roadmaps with GraphQL and real-time subscriptions. | Freemium | OAuth | No | Profile | |
| Linear GraphQL API GraphQL API for Linear issues, projects, teams, cycles, comments, and workflows. | Freemium | API Key | Yes | Profile | |
| Markdown to HTML API Convert Markdown documents to HTML. Upload Markdown content and receive rendered HTML output. Part of ApyHub's utility API collection. | Freemium | API Key | No | Profile | |
| Mattermost An open source platform for developer collaboration | Freemium | OAuth | No | Profile | |
| Monday Programmatically access and update data inside a monday.com account | Freemium | API Key | No | Profile | |
| Monday API Programmatically access and update data inside a monday.com account | Unknown | API Key | Unknown | Profile | |
| Noosh API application API Full description of Noosh API | Paid | Unknown | Yes | Profile | |
| Notion Integrate with Notion | Freemium | OAuth | No | Profile | |
| OCR.Space API OCR text extraction from images and PDFs with a free tier | Free | API Key | Unknown | Profile | |
| Orthanc API This is the full documentation of the [REST API](https://book.orthanc-server.com/users/rest.html) of Orthanc.<p>This reference is automatically generated from the source code of Orthanc. A [shorter cheat sheet](https://b | Free | Unknown | Yes | Profile | |
| PDFEndpoint HTML and URL to PDF API | Freemium | API Key | Yes | Profile | |
| PDFGate HTML to PDF API with support for custom headers, footers, fillable form fields, and encryption | Freemium | API Key | No | Profile | |
| PandaDoc DocGen and eSignatures API | Freemium | API Key | No | Profile | |
| Paraphrase Text API The Paraphrase Text Generator API generates a paraphrased version of the provided text | Freemium | API Key | No | Profile | |
| Pdfblocks Generate PDF documents using API | Freemium | API Key | Yes | Profile | |
| Pocket Bookmarking service | Free | OAuth | No | Profile | |
| Podio File sharing and productivity | Freemium | OAuth | No | Profile | |
| PrexView Data from XML or JSON to PDF, HTML or Image | Freemium | API Key | No | Profile | |
| Qualtrics API Work with Qualtrics surveys, distributions and response events | Unknown | Unknown | Yes | Profile | |
| RenderPDF.io HTML to PDF crazy fast, 500 pdfs/month + CDN-ready | Paid | API Key | No | Profile | |
| Restpack Provides screenshot, HTML to PDF and content extraction APIs | Freemium | API Key | No | Profile | |
| Sanity API Sanity API for content platform: real-time collaborative editing, structured content, asset pipelines, and custom workflows with GROQ query language. | Freemium | API Key | No | Profile | |
| Sanity Content Lake API HTTP APIs for querying, mutating, importing, and exporting Sanity content lake data. | Freemium | API Key | Yes | Profile | |
| Sheet2API Easy Google Sheets and Excel Online API | Freemium | API Key | Yes | Profile | |
| Sheetsu Easy google sheets integration | Freemium | API Key | No | Profile | |
| Stackexchange StackExchange API Stack Exchange is a network of 130+ Q&A communities including Stack Overflow. | Unknown | Unknown | Yes | Profile | |
| Storyblok API Storyblok API for headless CMS: visual editor, component-based content, multi-language support, and media management with CDN delivery. | Freemium | API Key | No | Profile | |
| Todoist Todo Lists | Freemium | OAuth | No | Profile | |
| Todoist API Todoist REST API for tasks, projects, labels, filters, comments, and activity sync powering the popular task manager's ecosystem. | Freemium | API Key | No | Profile | |
| Trello API Trello API for project management: create boards, lists, cards, checklists, labels, due dates, and team collaboration with power-ups. | Freemium | OAuth | No | Profile | |
| Trello Trello API This document describes the REST API of Trello as published by Trello.com. - <a href='https://trello.com/docs/index.html' target='_blank'>Official Documentation</a> - <a href='https://trello.com/docs/api' target='_blank' | Freemium | Unknown | Yes | Profile | |
| Typeform API Typeform API for forms and surveys: create forms, collect responses, manage themes, and embed interactive experiences with webhooks. | Freemium | API Key | No | Profile | |
| URL to Markdown Convert web page to MarkDown | Free | No | No | Profile | |
| Vector Express v2.0 Free vector file converting API | Free | No | No | Profile | |
| Vertopal Convert your files to a variety of formats using Vertopal API | Freemium | API Key | No | Profile | |
| WAV to MP3 API This API lets you convert wav files to mp3 | Freemium | API Key | No | Profile | |
| WakaTime Automated time tracking leaderboards for programmers | Freemium | No | No | Profile | |
| Webflow Data API REST API for Webflow sites, CMS collections, items, assets, forms, and ecommerce. | Freemium | API Key | Yes | Profile | |
| ZenRows API ZenRows API: web scraping API with anti-bot bypass, proxy rotation, JavaScript rendering, and CAPTCHA solving. | Freemium | API Key | Yes | Profile | |
| Zube Full stack project management | Freemium | OAuth | No | Profile | |
| apilayer pdflayer API HTML/URL to PDF | Free | API Key | Unknown | Profile | |
| fynk Generate, update, and manage contracts from your own systems with a secure and scalable REST API | Freemium | API Key | Yes | Profile | |
| iLovePDF Convert, merge, split, extract text and add page numbers for PDFs. Free for 250 documents/month | Freemium | API Key | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.