Retrofit

Retrofit is a type-safe HTTP client for Android and the JVM (Java and Kotlin) built by Square, turning HTTP API interfaces into callable Java objects with annotation-based configuration and pluggable serialization. Retrofit is built on top of OkHttp and supports synchronous/asynchronous execution, JSON/XML/Protobuf converters, RxJava adapters, and Kotlin coroutines. Current stable version is 3.0.0.

4 APIs 0 Features

AndroidHTTP ClientJavaKotlinLibraryMobileOpen SourceSDKSquare

APIs

Retrofit

Retrofit is a type-safe HTTP client for the JVM that turns annotated Java/Kotlin interfaces into HTTP API calls. Supports all HTTP methods via annotations. Built on OkHttp with ...

Retrofit Converters

Pluggable serialization converters for Retrofit supporting Gson, Moshi, Jackson, Kotlinx Serialization, JAXB, Protocol Buffers (Wire), SimpleXML, and Scalars.

Retrofit Call Adapters

Pluggable call adapters that allow Retrofit interfaces to return RxJava Observables (v1, v2, v3), Java 8 CompletableFuture, Guava ListenableFuture, and Scala Future types.

Retrofit Mock

Provides behavior-simulating implementations of Retrofit interfaces for local testing without requiring a network connection.

Pricing Plans

Retrofit Plans Pricing

3 plans

PLANS

Rate Limits

Retrofit Rate Limits

5 limits

RATE LIMITS

FinOps

Retrofit Finops

FINOPS

Semantic Vocabularies

Retrofit Context

11 classes · 4 properties

JSON-LD

JSON Structure

Retrofit Library Structure

0 properties

JSON STRUCTURE

Resources

GitHubOrganization

Sources

aid: retrofit
name: Retrofit
description: Retrofit is a type-safe HTTP client for Android and the JVM (Java and Kotlin) built by Square, turning HTTP API
  interfaces into callable Java objects with annotation-based configuration and pluggable serialization. Retrofit is built
  on top of OkHttp and supports synchronous/asynchronous execution, JSON/XML/Protobuf converters, RxJava adapters, and Kotlin
  coroutines. Current stable version is 3.0.0.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Android
- HTTP Client
- Java
- Kotlin
- Library
- Mobile
- Open Source
- SDK
- Square
url: https://raw.githubusercontent.com/api-evangelist/retrofit/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-05-02'
specificationVersion: '0.19'
apis:
- aid: retrofit:retrofit-core
  name: Retrofit
  description: Retrofit is a type-safe HTTP client for the JVM that turns annotated Java/Kotlin interfaces into HTTP API calls.
    Supports all HTTP methods via annotations. Built on OkHttp with support for synchronous Call, RxJava, Java 8 CompletableFuture,
    and Kotlin coroutines.
  humanURL: https://square.github.io/retrofit/
  tags:
  - Android
  - HTTP Client
  - Java
  - Kotlin
  - Open Source
  properties:
  - type: Documentation
    url: https://square.github.io/retrofit/
  - type: GitHub
    url: https://github.com/square/retrofit
  - type: ChangeLog
    url: https://github.com/square/retrofit/blob/trunk/CHANGELOG.md
  - type: JavaDoc
    url: https://square.github.io/retrofit/2.x/retrofit/
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/retrofit/refs/heads/main/json-schema/retrofit-library-schema.json
- aid: retrofit:retrofit-converters
  name: Retrofit Converters
  description: Pluggable serialization converters for Retrofit supporting Gson, Moshi, Jackson, Kotlinx Serialization, JAXB,
    Protocol Buffers (Wire), SimpleXML, and Scalars.
  humanURL: https://square.github.io/retrofit/#converters
  tags:
  - Converters
  - Gson
  - Jackson
  - Moshi
  - Protobuf
  - Serialization
  properties:
  - type: Documentation
    url: https://square.github.io/retrofit/#converters
  - type: GitHub
    url: https://github.com/square/retrofit/tree/trunk/retrofit-converters
- aid: retrofit:retrofit-adapters
  name: Retrofit Call Adapters
  description: Pluggable call adapters that allow Retrofit interfaces to return RxJava Observables (v1, v2, v3), Java 8 CompletableFuture,
    Guava ListenableFuture, and Scala Future types.
  humanURL: https://square.github.io/retrofit/#call-adapters
  tags:
  - Adapters
  - Async
  - Java 8
  - RxJava
  - Scala
  properties:
  - type: Documentation
    url: https://square.github.io/retrofit/#call-adapters
  - type: GitHub
    url: https://github.com/square/retrofit/tree/trunk/retrofit-adapters
- aid: retrofit:retrofit-mock
  name: Retrofit Mock
  description: Provides behavior-simulating implementations of Retrofit interfaces for local testing without requiring a network
    connection.
  humanURL: https://github.com/square/retrofit/tree/trunk/retrofit-mock
  tags:
  - Mock
  - Testing
  properties:
  - type: GitHub
    url: https://github.com/square/retrofit/tree/trunk/retrofit-mock
common:
- type: Website
  url: https://square.github.io/retrofit/
- type: Documentation
  url: https://square.github.io/retrofit/
- type: GitHub
  url: https://github.com/square/retrofit
- type: GitHubOrganization
  url: https://github.com/square
- type: ChangeLog
  url: https://github.com/square/retrofit/blob/trunk/CHANGELOG.md
- type: Issues
  url: https://github.com/square/retrofit/issues
- type: Maven
  url: https://search.maven.org/artifact/com.squareup.retrofit2/retrofit
- type: License
  url: https://github.com/square/retrofit/blob/trunk/LICENSE.txt
- type: JavaDoc
  url: https://square.github.io/retrofit/2.x/retrofit/
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/retrofit/refs/heads/main/vocabulary/retrofit-vocabulary.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com