An API, or application programming interface, is a set of definitions and protocols that facilitate the creation and integration of software applications. There are many APIs in different domain such as marketing, finance, accounting or CRM.
You will find direct links to APIs and ready-made integrations called Open Spell!
📅 List updated each Tuesday.
➡️ Top 50 to 41
➡️ Top 40 to 31
➡️ Top 30 to 21
➡️ Top 20 to 11
➡️ Top 10 to 01
Top 50 to 41 most used APIs
SurveySensum is an Ai-Enabled Experience Management Platform helps brands to decode customers feedback into actionable insights.
Powerful collaboration platform for teams to collect, organize and understand their data. Go from idea to execution in minutes with no code!
Pennylane is the all-in-one financial management and accounting platform for business leaders and their accountants
Pennylane Invoice Organize
The Pennylane Invoice Notifier
It's a place for product-loving enthusiasts to share and geek out about the latest mobile apps, websites, hardware projects, and tech creations.
Trello is the visual tool that allows your team to manage any type of project or workflow, or track tasks. Customize it by adding files, checklists or even automation rules to fit your team's way of working.
At Yahoo Finance, you get free stock quotes, up-to-date news, portfolio management resources, international market data, social interaction and mortgage rates that help you manage your financial life.
Square Connect is India's first mobile based real estate and loan marketplace for real estate brokers and business professionals. Search exclusive projects with good commission on sale and get the benefits of free leads for your business.
Xero online accounting software for your business connects you to your bank, accountant, bookkeeper, and other business apps.
Twilio helps personalize interactions and make international communications reliable so you can engage your customers.
Open Spell: Send SMS from your Google Spreadsheet with Twilio
Uptime Robot is a free tool used to monitor websites. It monitors your websites every 5 minutes and alerts you if your sites are down. Get notified by email, SMS, Slack and more.
Open Spell: Incident Alerting with SIGNL4 and Uptime Robot
Top 40 to 31 most used APIs
Google Ads is a product that you can use to promote your business, help sell products or services, raise awareness, and increase traffic to your website. Google Ads accounts are managed online, so you can create and change your ad campaign at any time, including your ad text, settings, and budget.
A solid, one-stop business management solution that takes care of your projects, CRM, invoicing, team collaboration and knowledge. Organize your entire workflow and grow your business in ways that it couldn't before.
Jira Cloud is built for every member of your software team to plan, track, and manage their work. Using the Atlassian platform, you can dynamically show information about issues, build new workflows and features, or integrate Jira with an existing service.
Synchronize Jira issue to Github issue
Open automatically a Jira ticket if UptimeRobot has observed a 5-minute downtime
Seyna provides tailored insurance products and software tools to grow brokerage businesses. All that, with zero-compromise on financial strength.
URL shortening is the translation of a long Uniform Resource Locator (URL) into an abbreviated alternative that redirects to the longer URL.
All in one Website analytics & competitive traffic intelligence platform - Compare website traffic and performance, analyze strategies & grow your market.
Astronomy Picture of the Day (APOD) is a website provided by NASA and Michigan Technological University (MTU). According to the website, "Each day a different image or photograph of our universe is featured, along with a brief explanation written by a professional astronomer."
The Movie Database (TMDB) is a community built movie and TV database. Every piece of data has been added by our amazing community dating back to 2008. TMDb's strong international focus and breadth of data is largely unmatched and something we're incredibly proud of. Put simply, we live and breathe community and that's precisely what makes us different.
Open Spell: Receive most populars movies from TMDb into your Slack channel
Typeform makes collecting and sharing information comfortable and conversational. It's a web based platform you can use to create anything from surveys to apps, without needing to write a single line of code.
Customer cases dispatcher
Where are we gonna eat today?
Paykickstart gives you the tools to make sure your subscriber count stays with you. You can offer automated discounts using their cancellation saver.
Top 30 to 21 most used APIs
The Conversions API (for web) allows advertisers to send web events from their servers directly to Facebook. Conversions API events are linked to a pixel and are processed like browser pixel events. This means that these conversion events are used in measurement, reporting, and optimization in the same way as browser pixel events.
Chucknorris.io is a free JSON API for hand curated Chuck Norris facts. Chuck Norris facts are satirical factoids about martial artist and actor Chuck Norris that have become an Internet phenomenon and as a result, have become widespread in popular culture. The 'facts' are normally absurd hyperbolic claims about Norris' toughness, attitude, virility, sophistication...
Google Drive is a free cloud-based storage service that enables users to store and access files online. The service syncs stored documents, photos and more. With this API, you are allow to manage files with Google Drive.
Open Spell: Smooth The Way For Expense Management
Google Maps is a web mapping product developed at Google by Lars Rasmussen and Jens Rasmussen. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets, real-time traffic conditions, and route planning for traveling by foot, car, air and public transportation.
Pipedrive is the easy-to-use, #1 user-rated CRM tool. Get more qualified leads and grow your business.
Voice SMS notifier
Customer cases dispatcher
Access all ressources from Google Search Console API to manage your website on Google and access analytics Original documentation.
SendinBlue provide a RESTFul API that can be used with any languages. With this API, you will be able to : - Manage your campaigns and get the statistics - Manage your contacts - Send transactional Emails and SMS - and much more...
Open Spell: Vonage Marketing Campaign Manager
One Tool to Organize All Your Work, Your Way. Work together with your team, store everything in one place, and organize projects the way you want.
QuickBooks is an accounting software package developed and marketed by Intuit. QuickBooks products are geared mainly toward small and medium-sized businesses and offer on-premises accounting applications as well as cloud-based versions that accept business payments, manage and pay bills, and payroll functions.
Open Spell: Quickbooks Invoice Automation
From breaking news and entertainment to sports and politics, get the full story with all the live commentary.
Top 20 to 11 most used APIs
Sell, market & service smarter with SuiteCRM the world’s number 1 Open Source CRM.
This API let you manage some parts of Meta API through its API.
This API allows businesses to receive and answer unlimited WhatsApp messages from their customers.
The OpenAI API can be applied to virtually any task that involves understanding or generating natural language or code. We offer a spectrum of models with different levels of power suitable for different tasks, as well as the ability to fine-tune your own custom models. These models can be used for everything from content generation to semantic search.
Open Spell: Typeform Survey Analyzer & Notifier
Get current weather, daily forecast for 16 days, and 3-hourly forecast 5 days for your city. Helpful stats, graphics, and this day in history charts are available for your reference.
Notion is a single space where you can think, write, and plan. Capture thoughts, manage projects, or even run an entire company — and do it exactly the way you want.
The WordPress REST API provides API endpoints for WordPress data types that allow developers to interact with sites remotely by sending and receiving JSON.
Online payment processing for internet businesses. Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes, including fraud prevention ...
Open Spell: Quickbooks Invoice Automation
Grist is a relational spreadsheet-database that empowers you to organize your data, your way. An API for manipulating Grist sites, workspaces, and documents.
HubSpot’s CRM platform has all the tools and integrations you need for marketing, sales, content management, and customer service. Each product in the platform is powerful alone, but the real magic happens when you use them together.
Vonage Marketing Campaign Manager
Vonage Voice Proxy with Hubspot
Automate company & deal creation into Hubspot and be notified on Slack
Top 10 to 01 most used APIs
Spotify is a digital music, podcast, and video service that gives you access to millions of songs and other content from creators all over the world.
GitHub is a code hosting platform for version control and collaboration. It lets you and others work together on projects from anywhere. This tutorial teaches you GitHub essentials like repositories, branches, commits, and pull requests.
Slack is a messaging app for business that connects people to the information they need. By bringing people together to work as one unified team, Slack transforms the way organizations communicate. One way to interact with the Slack platform is its HTTP RPC-based Web API, a collection of methods requiring OAuth 2.0-based user, bot, or workspace tokens blessed with related OAuth scopes.
The Bot API is an HTTP-based interface created for developers keen on building bots for Telegram. Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.
Discord is the easiest way to talk over voice, video, and text. Talk, chat, hang out, and stay close with your friends and communities.
Github Pull Request Reminder on Discord
With Google Calendar, you can quickly schedule meetings and events and get reminders about upcoming activities, so you always know what's next. Calendar is designed for teams, so it's easy to share your schedule with others and create multiple calendars that you and your team can use together.
Airtable is an easy-to-use online platform for creating and sharing relational databases. The user interface is simple, colorful, friendly, and allows anyone to spin up a database in minutes.
A Google Business Profile helps ensure that people find your business when looking for products and services like yours in their local area. Your Google My Business listing shows searchers where and how to visit your business. A Google Business Profile also improves your local SEO.
Gmail is a free email service developed by Google. Users can access Gmail on the web and using third-party programs that synchronize email content through POP or IMAP protocols.
Open Spells: Back-up Your Must-Read Emails
Google Sheets makes your data pop with colorful charts and graphs. Built-in formulas, pivot tables and conditional formatting options save time and simplify common spreadsheet tasks.