Feign

aid: feign
name: Feign
description: Feign (OpenFeign) is a declarative Java HTTP client binder inspired by Retrofit, JAX-RS, and WebSocket. It turns
  annotated interfaces into templated HTTP requests with pluggable encoders, decoders, error handlers, and HTTP transports.
  The OpenFeign organization maintains a large set of modules covering serialization (Jackson, Gson, Moshi, FastJSON2, JAXB,
  SAX, SOAP), HTTP transports (OkHttp, Apache HttpClient, Java 11 client, Ribbon), JAX-RS contracts, resilience (Hystrix),
  logging (SLF4J), form encoding, GraphQL, and metrics.
type: Index
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
access: 3rd-Party
created: '2026-03-27'
modified: '2026-04-28'
position: Consumer
tags:
- HTTP Client
- Java
- JVM
- Open Source
- REST
- SDKs
url: https://raw.githubusercontent.com/api-evangelist/feign/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: feign:feign-core
  name: Feign Core
  description: Feign Core is the base library that processes annotated Java interfaces into templated HTTP requests. It defines
    the contract, encoder, decoder, and client abstractions used across the entire OpenFeign ecosystem.
  humanURL: https://github.com/OpenFeign/feign
  tags:
  - HTTP Client
  - Java
  - Core
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign#readme
  - type: GettingStarted
    url: https://github.com/OpenFeign/feign#basics
  - type: Source Code
    url: https://github.com/OpenFeign/feign
  - type: Maven Central
    url: https://central.sonatype.com/artifact/io.github.openfeign/feign-core
  - url: graphql/feign-graphql.md
    type: GraphQL
- aid: feign:feign-jackson
  name: Feign Jackson
  description: Feign Jackson module provides Jackson-based JSON encoding and decoding for Feign-annotated client interfaces,
    the most common serialization choice in JVM applications.
  humanURL: https://github.com/OpenFeign/feign/tree/master/jackson
  tags:
  - JSON
  - Jackson
  - Serialization
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/jackson
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/jackson
- aid: feign:feign-gson
  name: Feign Gson
  description: Feign Gson module provides Google Gson-based JSON encoding and decoding for Feign clients, useful in projects
    already standardized on Gson.
  humanURL: https://github.com/OpenFeign/feign/tree/master/gson
  tags:
  - JSON
  - Gson
  - Serialization
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/gson
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/gson
- aid: feign:feign-okhttp
  name: Feign OkHttp
  description: Feign OkHttp module replaces the default JDK HTTP transport with Square's OkHttp client, adding HTTP/2, connection
    pooling, and modern transport features.
  humanURL: https://github.com/OpenFeign/feign/tree/master/okhttp
  tags:
  - HTTP Client
  - Transport
  - OkHttp
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/okhttp
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/okhttp
- aid: feign:feign-httpclient
  name: Feign Apache HttpClient
  description: Feign Apache HttpClient module integrates Apache HttpComponents (HC5) as the underlying HTTP transport for
    Feign clients.
  humanURL: https://github.com/OpenFeign/feign/tree/master/httpclient
  tags:
  - HTTP Client
  - Transport
  - Apache
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/httpclient
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/httpclient
- aid: feign:feign-java11
  name: Feign Java 11 HTTP
  description: Feign Java 11 HTTP module uses the JDK 11+ standard HttpClient as the transport, supporting HTTP/2 and asynchronous
    calls without external dependencies.
  humanURL: https://github.com/OpenFeign/feign/tree/master/java11
  tags:
  - HTTP Client
  - Transport
  - Java 11
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/java11
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/java11
- aid: feign:feign-ribbon
  name: Feign Ribbon
  description: Feign Ribbon module integrates Netflix Ribbon for client-side load balancing across a list of HTTP servers.
  humanURL: https://github.com/OpenFeign/feign/tree/master/ribbon
  tags:
  - Load Balancing
  - Netflix
  - Resilience
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/ribbon
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/ribbon
- aid: feign:feign-hystrix
  name: Feign Hystrix
  description: Feign Hystrix module wraps Feign client calls in Netflix Hystrix commands, adding circuit breaking, fallbacks,
    and bulkhead isolation.
  humanURL: https://github.com/OpenFeign/feign/tree/master/hystrix
  tags:
  - Resilience
  - Circuit Breaker
  - Netflix
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/hystrix
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/hystrix
- aid: feign:feign-jaxrs
  name: Feign JAX-RS
  description: Feign JAX-RS modules let developers reuse JAX-RS 1.x, 2.x, 3.x, and 4.x annotations on Feign client interfaces
    instead of Feign's native annotation set.
  humanURL: https://github.com/OpenFeign/feign/tree/master/jaxrs
  tags:
  - JAX-RS
  - Annotations
  - Contracts
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/jaxrs
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/jaxrs
- aid: feign:feign-slf4j
  name: Feign SLF4J
  description: Feign SLF4J module routes Feign request and response logging through the SLF4J facade, integrating with the
    host application's logging backend.
  humanURL: https://github.com/OpenFeign/feign/tree/master/slf4j
  tags:
  - Logging
  - Observability
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/slf4j
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/slf4j
- aid: feign:feign-form
  name: Feign Form
  description: Feign Form module adds support for application/x-www-form-urlencoded and multipart/form-data request bodies,
    including file uploads.
  humanURL: https://github.com/OpenFeign/feign-form
  tags:
  - Forms
  - Multipart
  - File Upload
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign-form
  - type: Source Code
    url: https://github.com/OpenFeign/feign-form
- aid: feign:feign-micrometer
  name: Feign Micrometer
  description: Feign Micrometer module exposes Feign client metrics (timings, counts, errors) through Micrometer for shipment
    to Prometheus, Datadog, and other monitoring backends.
  humanURL: https://github.com/OpenFeign/feign/tree/master/micrometer
  tags:
  - Metrics
  - Observability
  - Micrometer
  properties:
  - type: Documentation
    url: https://github.com/OpenFeign/feign/tree/master/micrometer
  - type: Source Code
    url: https://github.com/OpenFeign/feign/tree/master/micrometer
common:
- type: Website
  url: https://github.com/OpenFeign/feign
- type: Documentation
  url: https://github.com/OpenFeign/feign#readme
- type: GitHubOrganization
  url: https://github.com/OpenFeign
- type: Issues
  url: https://github.com/OpenFeign/feign/issues
- type: ReleaseNotes
  url: https://github.com/OpenFeign/feign/releases
- type: License
  url: https://github.com/OpenFeign/feign/blob/master/LICENSE
- type: Maven Central
  url: https://central.sonatype.com/namespace/io.github.openfeign
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com