Free-tier apis & integrations

AgentMail

AgentMail is an email inbox API for AI agents. It provides programmatic creation and management of email inboxes, threads, replies, attachments, realtime events, custom domains, semantic search, and data extraction through REST APIs, SDKs, webhooks, and MCP support.

ngrok

ngrok is an all-in-one cloud networking platform that provides secure tunnels, API gateway routing, traffic policy, and observability for services running anywhere. It can expose localhost or private ...

Permit.io

Permit.io is an authorization platform for apps, APIs, data, and AI agent workflows. It provides policy enforcement through a policy engine and PDPs, with support for RBAC, ABAC, ReBAC, and PBAC, plus GitOps, SDK, API, and Terraform-based policy management.

Engagespot

Engagespot is a notification infrastructure platform for developers. It provides a single API for sending in-app, email, push, SMS, Slack, Discord, WhatsApp, and webhook notifications, along with templates, workflows, provider management, logging, and a built-in real-time in-app inbox.

PostGrid

PostGrid is an offline communication platform and API for sending letters, postcards, checks, and related mail workflows through REST endpoints. The service also includes address verification, address...

WaiverCat

WaiverCat is a digital waiver platform for collecting signatures on PDF documents and other waiver forms. It provides an annotation tool to convert a PDF into an electronic waiver that can be signed, ...

Svix

Svix is a webhook infrastructure service for sending, receiving, and testing webhooks through an API and dashboard. It includes webhook dispatch, webhook ingestion, and Svix Play for inspecting and de...

Antideo

Antideo provides APIs for IP address location, IP reputation, email validation, and phone number validation. The service exposes endpoints for IP geolocation, proxy and blacklist checks, disposable and generic email detection, and phone number validation with country, carrier, and time zone data.

SMSGate

SMSGate is an open-source SMS gateway for Android devices that exposes a REST API, client libraries, and a CLI for sending and receiving SMS messages through a connected phone. It supports Android 5.0...

ImprovMX

ImprovMX is an email forwarding service for custom domains. It routes incoming mail to one or more destination addresses, and also offers SMTP sending for outbound mail from the same domain.

Maileroo

Maileroo is an email delivery platform that provides SMTP relay, a REST/HTTP email API, inbound routing, and email marketing tools. The service supports transactional sending from applications or webs...

Logo.dev

Logo.dev provides a logo API for developers that returns company logos by domain, name, or ticker. The service is hosted on a CDN and exposes logos through image URLs and API endpoints, with options such as format, size, retina output, fallback monograms, dark mode, grayscale, and company search.

Blynk

Blynk is a low-code IoT platform for connecting devices, building mobile and web dashboards, and managing fleets from a managed cloud. The platform includes mobile apps, a web console, device provisio...

ZITADEL is an identity infrastructure platform for authentication and authorization. It provides hosted login, API-first identity management, social login templates, passwordless authentication, multifactor authentication, passkeys, role-based access control, and multi-tenant organization support.

JSON2Video

JSON2Video is a video editing API that creates and renders videos from a JSON specification sent to a REST endpoint. It supports templates, variables, scene composition, AI voice-overs, subtitles, transitions, and AI-generated visuals, with MP4 output up to Full HD and 4K.

ScreenshotOf is a screenshot API that returns homepage captures for websites by path and date. The landing page shows example requests for domains such as /bbc.co.uk and dated captures like /bbc.co.uk/2026-04, with optional parameters for image size and output format.

Formlets

Formlets is an online form builder for creating contact forms, order forms, surveys, and other data collection forms. It publishes forms to a hosted service and can send submissions to email inboxes, export them to XLS, and connect to more than 2,000 software integrations.

QuickChart

QuickChart is an open-source chart image API that renders Chart.js configurations into chart images and QR codes through a URL-based API. It supports embedding charts in emails, reports, web pages, an...

OneCompiler

OneCompiler is an online code editor and compiler that runs code in the browser and supports more than 100 languages and databases. The service includes code execution, sharing, API access for running code from backend applications, editor embedding, and organization/team collaboration features.

Pixela

Pixela is a REST API service for recording and tracking habits, effort, and other day-series activity data. Users create an account, define a graph, and post dated values through HTTP requests; the service then renders the data as a GitHub-like graph or badge.

Free IP API

Free IP API is an IP geolocation API that returns location and network data for IPv4 and IPv6 addresses through JSON and XML endpoints. The service accepts GET and POST requests, and if no IP is supplied it uses the sender's IP address.

Data Fetcher

Data Fetcher is an Airtable extension that connects external APIs and remote files to Airtable without code. It supports importing data from JSON, CSV, XML, RSS, Google Sheets, and common SaaS integrations, then mapping and transforming the response into Airtable records.

CurrencyBeacon is a REST API for live and historical currency exchange rates, currency conversion, and blockchain-related data. The service covers 170+ fiat currencies, over 200 world currencies, and 6,000 cryptocurrencies, with historical rates available back to 1995.

CurlHub.io

CurlHub is a no-install debugger for API requests. It lets developers inspect API traffic and create a simple request bin without installing local tooling.

CraftMyPDF

CraftMyPDF is a PDF generation API and template editor that creates PDFs and images from reusable templates and JSON data. It supports drag-and-drop template design, JavaScript-style expressions, fill...

Country-State-City Microservice and API

Country-State-City Microservice and API is a web API for retrieving geographical data such as countries, states, cities, postal codes, regions, and provinces. The landing page lists endpoints for gett...

Commerce Layer

Commerce Layer is an API-first commerce platform that provides checkout, order management, promotions, and point-of-sale capabilities through a single backend. The product exposes more than 400 API en...

Cloudmersive APIs

Cloudmersive APIs is a cloud API platform focused on file security, content scanning, document processing, and related developer utilities. The product includes virus scanning, content disarm and reco...

Canopy API

Canopy API is an API service for retrieving Amazon product data, including product titles, descriptions, pricing, sales estimates, reviews, and search results. It exposes the data through REST, GraphQL, MCP, and Skills for LLMs, and includes documentation and example repositories for integration.

Beeceptor

Beeceptor is a mock API server platform for REST, SOAP, GraphQL, and gRPC endpoints. It lets developers upload OpenAPI, WSDL, GraphQL SDL, or proto definitions, or define responses through a no-code UI, then inspect requests, add matching rules, and return dynamic or stateful responses.

MailerSend

MailerSend is an email sending service that provides an email API, SMTP relay, dynamic email templates, inbound email routing, email verification, user management, multiple domains, DMARC monitoring, ...

Buttondown

Buttondown is a hosted email newsletter platform for creating, sending, and managing mailing lists. It provides a markdown or rich text editor, custom-domain sending, hosted newsletter archives, paid ...

Typeform

Typeform is a form and survey platform that lets users build interactive forms, surveys, quizzes, polls, registration forms, application forms, and landing pages. The pricing page lists plan-based res...

NocoDB Cloud

NocoDB Cloud is a hosted no-code database platform that presents relational data in a spreadsheet-style interface. It can connect to external PostgreSQL and MySQL databases or use NocoDB-managed stora...

Baserow

Baserow is an open source no-code database and application builder. It lets teams organize data in databases, create applications on top of that data, and automate workflows without writing code. The ...

Airtable

Airtable is a cloud workspace for building AI-powered workflows, apps, and agents on top of relational data. It combines a no-code app builder, databases, automations, interfaces, reporting, and integrations so teams can model data, connect workflows, and expose custom views and apps.

Exa

Exa provides a web search API, website crawler tools, and deep research endpoints for applications that need current web data. The product includes Search, Contents, Answer, and Websets, with API access through the dashboard and documentation for search, page contents, and structured outputs.

Bright Data

Bright Data is a web data platform that provides proxy infrastructure, web access APIs, scraper APIs, datasets, and web archive access for collecting public web data at scale. The platform supports access, extraction, browsing, and data delivery workflows across real-time and historical sources.

ScraperAPI

ScraperAPI is a web scraping API that fetches public web pages while handling proxies, browser rendering, CAPTCHA challenges, and IP rotation on the caller’s behalf. It exposes a simple API interface ...

Noirdoc

Noirdoc is a German-language AI chat and API proxy service that pseudonymizes sensitive input before it reaches an LLM. It detects and replaces personal data, company names, locations, tax IDs, URLs, ...

Dreambase

Dreambase is an AI-native analytics layer for Supabase that connects directly to a Supabase project, scans the schema, and generates dashboards, reports, and insights from the database source of truth...

Contentful

Contentful is a headless content management platform that stores structured content in spaces and exposes it through APIs and developer tools. The pricing page lists a Free Platform plan with 10 users...

Activepieces

Activepieces is an automation platform for building workflows that connect SaaS apps, APIs, webhooks, and AI services. The landing page shows 694+ integrations, an AI agent builder, governance controls, deployment options, and a cloud product with a sign-up flow.

WorkOS

WorkOS is an enterprise identity and access platform that provides APIs for adding single sign-on, directory sync, user management, audit logs, role-based access control, bot blocking, and related authentication features to applications.

Calendly

Calendly is an online appointment scheduling platform that connects up to six calendars, exposes real-time availability, and lets users publish booking links for invitees. It supports configurable ava...

Frontegg

Frontegg is a customer identity and access management platform for SaaS applications. It provides authentication, authorization, multi-tenant user management, SSO, SCIM, MFA, admin portals, and analytics through a low-code platform and developer APIs.

Mailtrap

Mailtrap is an email delivery platform with two main products: Email API/SMTP for sending transactional and promotional email, and Email Sandbox for testing emails in staging, dev, and QA environments...

Storyblok

Storyblok is a headless CMS with a visual editor, API-first content modeling, and support for structured content delivery through GraphQL, REST, and management APIs. The platform includes a visual edi...

Mux

Mux is a video API for developers that provides video upload, storage, delivery, playback, analytics, and workflow APIs for on-demand and live video. The platform exposes features for encoding, player...

OpenRouter

OpenRouter is a unified API and chat interface for accessing large language models from multiple providers through a single OpenAI-compatible endpoint. It supports model browsing, routing, fallback selection, and API key management for developers integrating LLMs into applications.

Fillout is a web form builder for creating forms, quizzes, surveys, scheduling forms, PDF generation flows, payment collection forms, and workflow-enabled intake forms. It supports drag-and-drop form ...

Telnyx is a global communications platform that provides voice, messaging, numbers, SIP trunking, speech-to-text, text-to-speech, eSIM, RCS, and programmable networking APIs. The page emphasizes its o...

Pipedream

Pipedream is a workflow automation platform for connecting APIs, databases, webhooks, and app events. It provides a workflow builder, code execution for Node.js, Python, Go, and Bash, and managed authentication for 3,000+ integrated apps.

Ably is a realtime messaging platform that provides pub/sub APIs, chat, AI transport, live objects, spaces, and live sync for applications that need low-latency updates and state synchronization. The ...

Kinde

Kinde is a developer platform for authentication, billing, access management, feature flags, and user management in SaaS applications. It provides hosted auth flows, SDKs for multiple languages and fr...

Logto

Logto is an authentication and authorization platform for developers. It implements OIDC and OAuth 2.1 and adds sign-in flows, multi-tenancy, enterprise SSO, RBAC, MFA, organizations, machine-to-machine authentication, and account APIs for SaaS and AI applications.

Make is a visual automation platform for connecting apps, data sources, and AI models into workflows and AI agents. It provides a no-code workflow builder, scenario scheduling, routers and filters, API access, and a library of 3,000+ pre-built app integrations.

Postmark

Postmark is an email delivery service that exposes both an Email API and SMTP service for sending transactional and broadcast email. The platform also includes inbound email processing, message streams, templates, webhooks, analytics, and official SDKs for common languages and frameworks.

Pusher

Pusher provides hosted realtime APIs for building features such as live updates, pub/sub messaging, in-app chat, location tracking, and push notifications. Its Channels product supports publish/subscribe messaging across web and mobile clients, while Beams handles programmatic push notifications.

Auth0

Auth0 is an authentication and authorization platform for web, mobile, and AI agent applications. It provides hosted login flows, social and enterprise connections, passwordless authentication, multif...

Stoplight

Stoplight is an API design and documentation platform for creating OpenAPI and JSON Schema definitions, generating interactive documentation, and running mock servers from the same workspace. It supports code-based editing, schema reuse, design validation, Git sync, and OpenAPI export.

Cal.com

Cal.com is a scheduling platform for online bookings that lets users publish booking links, connect calendars, set availability rules, and manage meeting types from a web app. The product also include...

DeepL

DeepL is a language AI platform that provides text translation, document translation, speech translation, writing assistance, and an API for integrating translation into applications. The platform inc...

DevCycle

DevCycle is a feature flag and feature management platform with OpenFeature-native support. It provides SDKs, APIs, a CLI, and a web dashboard for creating, targeting, rolling out, and monitoring flags across client-side, server-side, web, and mobile applications.

Twilio

Twilio is a communications platform that exposes APIs for SMS, voice, email, WhatsApp, RCS, video, and related customer engagement workflows. The landing page shows developer SDKs and API examples for...

Postman

Postman is an API platform for designing, testing, documenting, monitoring, and distributing APIs and services. It includes an API client, collections and environments, specs, mock servers, Flows, CLI support, and workspace collaboration features.

Plivo

Plivo is a communications platform that provides voice, SMS, WhatsApp, and chat APIs, along with an AI agent product for building voice agents. The landing page describes no-code and developer-oriente...

Doppler

Doppler is a cloud-based secrets management platform for storing, syncing, and rotating application secrets such as API keys, database URLs, certificates, and service tokens. It exposes a dashboard, C...

Tinybird is a managed ClickHouse platform for building and operating real-time analytics applications. It combines hosted ClickHouse storage and query execution with streaming ingestion, connectors for Kafka, S3, GCS, DynamoDB, and URL-based sources, plus APIs that expose SQL queries as endpoints.

Apidog

Apidog is an all-in-one API platform for designing OpenAPI specifications, debugging requests against those specs, running automated API tests, publishing interactive documentation, and generating moc...

Bitly

Bitly is a link management platform that provides URL shortening, QR code generation, and custom landing pages in a single web application. It supports branded links, redirects, UTM tracking, analytic...

AssemblyAI

AssemblyAI provides speech-to-text, streaming speech-to-text, speech understanding, guardrails, and an LLM gateway for voice and audio applications. The platform exposes APIs for prerecorded transcrip...

Dub

Dub is a link attribution platform that combines short links, conversion tracking, affiliate program management, and an API for programmatic link creation. The product supports branded short domains, ...

Composio

Composio is an integration and agent execution platform that helps teams connect AI agents to external apps and tools. It provides managed authentication, just-in-time tool calls, sandboxed execution, and support for parallel workflows across more than 1,000 applications.

Amazon EventBridge

Amazon EventBridge is a serverless event routing service that helps organizations build event-driven applications at scale across AWS services, SaaS applications, and custom systems.

Deepgram

Deepgram is an enterprise voice AI platform that provides APIs for speech-to-text, text-to-speech, voice agents, and audio intelligence. It is designed for developers, product teams, and enterprises that need to build real-time or batch voice experiences with cloud or self-hosted deployment options.

Autohive

Autohive is an AI agent platform that helps teams build, collaborate with, and automate work using custom AI teammates. It is designed for everyday business users who want to describe repetitive tasks in plain language and turn them into agents without writing code.

Amazon API Gateway

Amazon API Gateway is a fully managed service for creating, publishing, maintaining, monitoring, and securing APIs at scale. It provides a front door for applications to access data, business logic, and backend functionality through REST APIs, HTTP APIs, and WebSocket APIs.

Amazon Cognito

Amazon Cognito is an AWS identity and access management service that helps organizations implement secure authentication and authorization for customer applications, AI agents, microservices, and APIs...

Upstash

Upstash is a serverless data platform built for modern applications that need low-latency, globally distributed data services without managing infrastructure. It provides HTTP-based and Redis-compatible APIs for key-value storage, messaging, vector search, workflow automation, and search.

Zapier

Zapier is an automation platform that helps teams connect apps, data, and AI tools in one governed system. It is designed to streamline repetitive work, orchestrate workflows, and enable no-code automation across thousands of business applications.

ElevenLabs

ElevenLabs is an AI audio platform for generating realistic speech, cloning voices, creating music and sound effects, transcribing speech, and building conversational voice agents. It serves creators,...

UptimeRobot

UptimeRobot is an uptime monitoring service that checks websites, APIs, servers, and other endpoints to help teams detect outages and performance issues quickly. It provides real-time alerts, public s...

Tally

Tally is a free, intuitive form builder that helps individuals and teams create beautiful online forms without coding. Its document-style editor makes it easy to build everything from simple contact forms to more advanced workflows in a fast, flexible way.

Tavily

Tavily provides a single API for connecting AI agents to the web with real-time search, extraction, research, and crawling capabilities.

Zero Sheets

Zero Sheets is a developer-focused service that turns Google Sheets spreadsheets into RESTful JSON APIs. It is designed to help teams rapidly build prototypes, websites, apps, and other data-driven products without creating a custom backend from scratch.

Outscraper

Outscraper provides cloud-based data extraction tools and APIs for collecting public web data at scale, with a strong focus on Google Maps and other major online sources. It is designed for marketers,...

APITemplate.io

APITemplate.io is a document and image generation platform that helps teams automate the creation of PDFs, images, certificates, reports, invoices, and social visuals from reusable templates, HTML, or URLs.

APIVerve

APIVerve is an API marketplace and developer platform that provides access to 300+ production-ready APIs through a single account and API key. It is designed to simplify integration work by offering consistent schemas, predictable pricing, and centralized access across a broad catalog of services.

ipdata

ipdata provides an IP geolocation and threat intelligence API for enriching IP addresses with location, organization, usage, and risk data.

Insomnia is an AI-native API collaboration platform for developers who design, test, debug, and manage endpoints across REST, GraphQL, gRPC, WebSocket, Socket.IO, and SSE workflows. It combines an API...

Hoppscotch

Hoppscotch is a developer-first API platform for creating, testing, documenting, and sharing APIs. It is designed to help teams move from prototyping to production without switching tools, and it supports both cloud use and self-hosted deployment.

Browse AI

Browse AI is a no-code web scraping and website monitoring platform that helps teams extract structured data from websites, automate recurring checks, and turn web pages into usable datasets. It is designed for users who need reliable data extraction at scale without building custom scripts.

IP.City

IP.City provides an IP geolocation API that converts an IP address into location data such as country, city, latitude, longitude, and ISP or organization details. It also includes a user-agent decoding API that identifies browser, operating system, and device information from a user-agent string.

Website Screenshot API

Abstract's Website Screenshot API converts a URL or raw HTML into a high-quality image through a simple REST interface. It is designed for developers who need reliable page capture for previews, monitoring, QA, and workflow automation.

Abstract Exchange Rate API

Abstract API's Exchange Rate and Currency Conversion API provides live and historical currency data through a modern REST API. It is designed for developers and businesses that need reliable exchange ...

IP Geolocation API

Abstract API’s IP Geolocation API provides location intelligence for IP addresses, helping developers identify where a user is connecting from and enrich requests with useful contextual data.

PagerDuty

PagerDuty is an AI-first operations platform for incident management, on-call coordination, and digital operations response. It helps teams detect issues, route alerts, mobilize responders, and resolve incidents faster across the tools they already use.

Jotform

Jotform is an online form builder that helps businesses create professional forms without coding. It supports drag-and-drop form creation, customizable branding, conditional logic, payment collection, reporting, and workflow automation.

DigitalOcean Functions

DigitalOcean Functions is a serverless computing service that lets developers run code on demand without managing servers. It is designed to help teams focus on application logic while the platform handles scaling, security, and environment maintenance.

Amazon SQS

Amazon Simple Queue Service (Amazon SQS) is a fully managed message queuing service for microservices, distributed systems, and serverless applications. It helps teams decouple application components so they can exchange messages reliably without managing queue infrastructure.

Filestack

Filestack is a developer-focused file handling platform that provides APIs and UI components for uploading, transforming, converting, and delivering files within applications. It is designed to simpli...

Amazon SES

Amazon Simple Email Service (Amazon SES) is a cloud-based email service provider for sending and receiving email at scale. It is designed for transactional messages, marketing campaigns, newsletters, ...

Kong Konnect

Kong Konnect is Kong’s unified API and AI connectivity platform for building, running, discovering, and governing modern digital traffic. It brings together API management, AI gateway capabilities, ev...

Abstract Email Validation API

Abstract API’s Email Validation and Verification API provides real-time email verification designed to help teams reduce bounce rates, clean signup forms, and improve the quality of inbound leads. It ...

Amazon SNS

Amazon Simple Notification Service (SNS) is a fully managed pub/sub messaging service from AWS that helps applications send notifications and distribute events at scale.

jsDelivr

jsDelivr is a free CDN for open source projects that serves JavaScript and ESM assets from npm and GitHub. It supports direct file URLs, version ranges, default entry points, directory listings, on-demand minification, source maps, and combining multiple files.