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REST API Client Libraries

Libraries that simplify interactions with RESTful APIs by providing a dedicated client interface for consuming web services in applications.

161 projects

169,285 contributors

$1.3B

Most contributors

Elasticsearch

Elasticsearch is a distributed, RESTful search and analytics engine capable of addressing a growing number of use cases. As the heart of the Elastic Stack, it centrally stores data for lightning fast search, fine‑tuned relevancy, and powerful analytics.

18,288

3,601

$193M

Supabase

Supabase is an open source Firebase alternative providing a PostgreSQL database, authentication, instant APIs, real-time subscriptions, and edge functions. It offers a platform for building scalable and secure backend infrastructure with a focus on developer experience.

16,020

2,642

$72M

Axios

Axios is a popular HTTP client library for making requests from browsers and Node.js. It provides a simple, Promise-based API for sending HTTP requests and handling responses, with features like request/response interceptors, automatic transforms for JSON data, and built-in CSRF protection.

14,199

3,098

$647K

Istio

Istio extends Kubernetes to establish a programmable, application-aware network using the powerful Envoy service proxy. Working with both Kubernetes and traditional workloads, Istio brings standard, universal traffic management, telemetry, and security to complex deployments.

13,474

2,895

$428M

AWS CLI

Universal Command Line Interface for Amazon Web Services

11,359

2,974

$12M

Nextcloud Android

Nextcloud Android is the official Android client application for Nextcloud, providing secure access to files, calendars, contacts and other data stored on Nextcloud servers. It enables file synchronization, media streaming, automatic photo/video upload, and offline access to Nextcloud content from Android devices.

8,757

1,222

$11M

MinIO

MinIO is a high-performance, distributed object storage system compatible with Amazon S3 API. It is designed for cloud-native applications, offering features like high-availability, scalability, and encryption for storing unstructured data such as photos, videos, log files, backups, and container images.

6,980

1,731

$11M

Requests

Requests is a popular HTTP library for Python that simplifies making HTTP/1.1 requests. It abstracts away complexities of making requests behind a beautiful, simple API so developers can focus on interacting with services and consuming data rather than dealing with session management, query parameters, and authentication.

6,884

1,922

$432K

Retrofit

Retrofit is a type-safe HTTP client library for Android and Java that turns HTTP APIs into Java interfaces, making it easier to make network requests and handle responses in a structured way. It supports URL parameter replacement, query parameters, and request body conversion using configurable converters.

4,365

740

$4.2M

Guzzle

Guzzle is a PHP HTTP client library that makes it easy to send HTTP requests and integrate with web services. It provides a simple interface for making HTTP requests, handling responses, and working with RESTful APIs.

3,276

956

$479K

MISP

MISP is an open source threat intelligence and sharing platform that enables organizations to share, store and correlate indicators of compromise, threat intelligence, financial fraud information, vulnerability information and counter-terrorism information. It includes automatic correlation features, data import/export tools, and built-in sharing mechanisms.

2,881

207

$13M

reqwest

Reqwest is a Rust HTTP client library that provides a powerful and ergonomic interface for making HTTP requests. It supports async/await, JSON serialization/deserialization, and various authentication methods.

2,699

995

$626K

Baileys

Baileys is a TypeScript/JavaScript library for creating WhatsApp Web bots and automation tools. It provides a lightweight implementation of the WhatsApp Web API that enables developers to build applications that can interact with WhatsApp programmatically.

2,626

220

$5.2M

libgit2

libgit2 is a portable, pure C implementation of the Git core methods as a re-entrant linkable library that provides raw Git object access and common Git operations like repository management, branch/tag handling, and working with the Git index

2,606

830

$12M

RestSharp

Simple REST and HTTP API Client for .NET

2,591

408

$713K

Fog

Fog is a cloud services library for Ruby that provides a unified interface to interact with multiple cloud providers. It abstracts away the differences between cloud services, allowing developers to write code that works consistently across different providers for compute, storage, DNS, and other cloud infrastructure services.

2,589

761

$1.6M

Qiskit

Qiskit is an open-source software development kit for quantum computing that enables users to create, manipulate and run quantum circuits on quantum computers and simulators. It provides tools for quantum programming, algorithm development, hardware access, and quantum education.

2,502

271

$17M

LangChain4j

Java version of LangChain

1,906

250

$22M

Feign

Feign makes writing java http clients easier

1,872

314

$1.9M

Got

Got is a human-friendly and feature-rich HTTP request library for Node.js that provides a simpler interface for making HTTP requests compared to alternatives like Axios or node-fetch

1,834

697

$662K

XChange

XChange is a Java library providing a streamlined API for interacting with 60+ Bitcoin and Altcoin exchanges providing a consistent interface for trading and accessing market data.

1,760

209

$15M

Discord.Net

Discord.Net is a .NET library for building Discord bots and applications, providing a comprehensive API wrapper and tools for interacting with Discord's services programmatically

1,708

340

$3.4M

Meilisearch

Meilisearch is an open-source search engine that provides fast, relevant, and typo-tolerant full-text search capabilities. It is designed to be easy to integrate into applications and offers features like instant search results, custom ranking rules, and faceted search.

1,674

470

$7.1M

node-soap

A SOAP client and server for node.js.

1,632

367

$1.4M

govmomi

Go library for the VMware vSphere API

1,618

315

$13M

Refit

The automatic type-safe REST library for .NET Core, Xamarin and .NET. Heavily inspired by Square's Retrofit library, Refit turns your REST API into a live interface.

1,568

290

$855K

Stripe.net

Stripe.net is a sync/async .NET 4.6.1+ client, and a portable class library for stripe.com.

1,555

188

$6.7M

Faraday

Simple, but flexible HTTP client library, with support for multiple backends.

1,448

572

$299K

AutoRest

OpenAPI (f.k.a Swagger) Specification code generator. Supports C#, PowerShell, Go, Java, Node.js, TypeScript, Python

1,431

240

$17M

OpenAPI TypeScript

🚀 The OpenAPI to TypeScript codegen. Generate clients, SDKs, validators, and more. Support: @mrlubos

1,298

376

$35M

JSforce

Salesforce API Library for JavaScript applications (both on Node.js and web browser)

1,277

269

$2.6M

JDA (Java Discord API)

JDA (Java Discord API) is a Java library that provides a wrapper for the Discord API, enabling developers to create Discord bots and applications in Java. It offers features for interacting with Discord's gateway and REST API, handling events, managing guilds/servers, channels, messages, and other Discord functionality.

1,245

363

$4.8M

PnPjs

Fluent JavaScript API for SharePoint and Microsoft Graph REST APIs

1,242

77

$16M

signal-cli

signal-cli provides an unofficial commandline, JSON-RPC and dbus interface for the Signal messenger.

1,204

200

$1.6M

Astroquery

Functions and classes to access online data resources. Maintainers: @keflavich and @bsipocz and @ceb8

1,098

187

$7.4M

Go OpenAI

OpenAI ChatGPT, GPT-3, GPT-4, DALL·E, Whisper API wrapper for Go

1,081

236

$489K

ExAws

A flexible, easy to use set of clients AWS APIs for Elixir

1,001

310

$248K

Senparc.Weixin SDK

微信全平台 .NET SDK， Senparc.Weixin for C#，支持 .NET Framework 及 .NET Core、.NET 8.0。已支持微信公众号、小程序、小游戏、微信支付、企业微信/企业号、开放平台、JSSDK、微信周边等全平台。 WeChat SDK for C#.

948

64

$12M

dockerode

Docker + Node = Dockerode (Node.js module for Docker's Remote API)

948

389

$209K

Google Auth Library Node.js

A Node.js client library that provides authentication and authorization for Google Cloud Platform and Google APIs, supporting various authentication methods including OAuth2, service accounts, and application default credentials

924

249

$953K

Resty

Resty is a simple HTTP and REST client library for Go (golang), providing a fluent and expressive API for making HTTP requests with features like automatic marshaling, retry mechanisms, and middleware support

872

256

$502K

Google Cloud Pub/Sub Node.js Client

A Node.js client library for Google Cloud Pub/Sub, providing an interface to interact with Google's scalable message queue service for publishing and subscribing to event data and streaming analytics

859

250

$4.5M

Ky

🌳 Tiny & elegant JavaScript HTTP client based on the Fetch API

837

297

$241K

Crawlee

Crawlee—A web scraping and browser automation library for Node.js to build reliable crawlers. In JavaScript and TypeScript. Extract data for AI, LLMs, RAG, or GPTs. Download HTML, PDF, JPG, PNG, and other files from websites. Works with Puppeteer, Playwright, Cheerio, JSDOM, and raw HTTP. Both headful and headless mode. With proxy rotation.

801

148

$92M

Kiota

OpenAPI based HTTP Client code generator

746

159

$3.9M

Twilio Ruby SDK

A Ruby gem for communicating with the Twilio API and generating TwiML

740

218

$3.8M

sttp

STTP (Scala HTTP) is a Scala library providing a clean and flexible API for making HTTP requests. It supports multiple backends including Akka HTTP, http4s, and OkHttp, offering type-safe request definitions and response handling across different effect types.

719

176

$1.2M

Unirest for Java

Unirest in Java: Simplified, lightweight HTTP client library.

678

186

$795K

Mechanize

Mechanize is a Ruby library that makes it easy to automate interaction with websites. It automatically handles cookies, follows redirects, and can follow links and submit forms programmatically. The library provides a simple interface for scraping web content and emulating browser behavior.

664

228

$424K

kube-rs

Rust client for Kubernetes in the style of a more generic client-go, a runtime abstraction inspired by controller-runtime, and a derive macro for CRDs inspired by kubebuilder.

599

259

$8.4M

Requests-OAuthlib

OAuthlib support for Python-Requests!

598

200

$124K

Slack SDK for Java

Slack Developer Kit (including Bolt for Java) for any JVM language

596

125

$49M

PnP Core SDK

The PnP Core SDK is a modern .NET SDK designed to work for Microsoft 365. It provides a unified object model for working with SharePoint Online and Teams which is agnostic to the underlying API's being called

593

35

$9.5M

Tesla

Tesla is an HTTP client library for Elixir that provides a flexible and composable way to build HTTP clients with middleware support, allowing developers to make HTTP requests with features like automatic JSON encoding/decoding, form encoding, retry logic, and request/response processing

567

213

$340K

Google Cloud Platform C++ Client Libraries

A collection of idiomatic C++ client libraries for Google Cloud Platform services, providing native C++ interfaces to interact with Google Cloud APIs including storage, compute, databases, and other cloud services

548

77

$107M

ofetch

A lightweight, promise-based HTTP client for making API requests in JavaScript/TypeScript environments, designed to work in both Node.js and browser contexts with a focus on simplicity and modern features like automatic JSON parsing

535

152

$71K

OWSLib

OWSLib is a Python package for client programming with Open Geospatial Consortium (OGC) web service (hence OWS) interface standards, and their related content models.

498

148

$6.4M

Needle

Nimble, streamable HTTP client for Node.js. With proxy, iconv, cookie, deflate & multipart support.

481

153

$202K

Apache jclouds

The Java Multi-Cloud Toolkit

436

70

$17M

Stream Chat Android SDK

JS / Browser Client - Build Chat with GetStream.io

404

41

$17M

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