# coapi | Ahoo Wang | Knowledge Base | Instagit

Streamlining HTTP client definition in Spring 6, CoApi provides zero boilerplate code auto-configuration for more convenient and efficient interface calls | 简化 Spring 6 中 HTTP 客户端定义，提供零样板代码自动配置，让接口调用更便捷高效

GitHub Stars: 7

Repository: https://github.com/ahoo-wang/coapi

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## Articles

### [Does CoApi Support Spring Boot 3.x? Version Compatibility and Setup Guide](/ahoo-wang/coapi/coapi-support-spring-boot-3-plus)

Discover CoApi support for Spring Boot 3.x. Get a clear setup guide and version compatibility details for CoApi 1.x targeting Spring Boot 3.2.x and later.

- Tags: getting-started
- Published: 2026-02-23

### [How to Integrate CoApi into Spring Boot Applications: A Step-by-Step Guide](/ahoo-wang/coapi/integrate-coapi-existing-spring-boot-applications)

Integrate CoApi into Spring Boot apps easily. Follow our step-by-step guide to add the starter dependency, enable CoApi, define interfaces, and inject clients for seamless integration.

- Tags: how-to-guide
- Published: 2026-02-23

### [How to Add Custom Headers to a Specific CoApi Client Using WebClientBuilderCustomizer](/ahoo-wang/coapi/add-custom-headers-coapi-client-requests)

Learn how to add custom headers to a specific CoApi client in Spring using WebClientBuilderCustomizer. Customize CoApi requests by overriding the customize method with defaultHeader or defaultHeaders.

- Tags: how-to-guide
- Published: 2026-02-23

### [How to Migrate from Feign or OpenFeign to CoApi: A Step-by-Step Guide](/ahoo-wang/coapi/migrate-feign-openfeign-to-coapi-steps)

Migrate from Feign OpenFeign to CoApi effortlessly. Replace annotations, update dependencies, and leverage CoApi for seamless reactive or synchronous HTTP calls with auto-configured WebClient RestClient.

- Tags: migration-guide
- Published: 2026-02-23

### [How CoApi Handles Request and Response Body Conversion (JSON, XML, and Custom Formats)](/ahoo-wang/coapi/coapi-request-response-body-conversion-json-xml)

Learn how CoApi manages request and response body conversion for JSON, XML, and custom formats. Discover its integration with Spring WebFlux WebClient for seamless data handling.

- Tags: deep-dive
- Published: 2026-02-23

### [How CoApi Integrates with Spring Cloud LoadBalancer for Service Discovery](/ahoo-wang/coapi/coapi-integration-spring-cloud-loadbalancer-service-discovery)

Learn how CoApi integrates with Spring Cloud LoadBalancer for seamless service discovery. Understand how it automatically routes requests using @LoadBalanced annotations and lb:// URLs.

- Tags: how-to-guide
- Published: 2026-02-23

### [CoApi Internal Architecture: How AbstractCoApiRegistrar and CoApiFactoryBean Build Spring HTTP Clients](/ahoo-wang/coapi/coapi-architecture-abstractcoapiregistrar-coapifactorybean)

Explore CoApi's internal architecture. Learn how AbstractCoApiRegistrar and CoApiFactoryBean build Spring HTTP clients using JDK proxies for annotated interfaces.

- Tags: internals
- Published: 2026-02-23

### [How CoApi Interceptors Work: Modify Requests and Responses in Spring Boot](/ahoo-wang/coapi/coapi-interceptors-request-response-modification)

Learn how CoApi interceptors modify Spring Boot requests and responses. Implement ClientHttpRequestInterceptor and configure via YAML for seamless integration.

- Tags: how-to-guide
- Published: 2026-02-23

### [How to Write Unit Tests and Integration Tests for CoApi Client Interfaces](/ahoo-wang/coapi/testing-coapi-clients-unit-integration)

Learn to write unit and integration tests for CoApi client interfaces. Verify bean registration with ApplicationContextRunner and test proxies against real endpoints using WireMock.

- Tags: how-to-guide
- Published: 2026-02-23

### [CoApi Configuration Properties: Complete Reference for application.yml](/ahoo-wang/coapi/coapi-configuration-properties-application-yml)

Explore the complete reference for CoApi configuration properties in application.yml or application.properties. Control client behavior, authentication, timeouts, retry policies, and observability.

- Tags: api-reference
- Published: 2026-02-23

### [WebClient vs RestClient Backends in CoApi: A Complete Technical Comparison](/ahoo-wang/coapi/coapi-webclient-vs-restclient-backends)

Compare WebClient and RestClient backends in CoApi. Learn the key differences: WebClient offers non-blocking reactive calls, RestClient provides synchronous blocking requests. Understand CoApi's HTTP client configurations.

- Tags: comparison
- Published: 2026-02-23

### [How to Add Bearer Token Authentication to CoApi Clients](/ahoo-wang/coapi/add-authentication-bearer-token-coapi-clients)

Add Bearer token authentication to CoApi clients by implementing ExpirableTokenProvider and registering BearerTokenFilter. Secure your API requests automatically.

- Tags: how-to-guide
- Published: 2026-02-23

### [How to Customize WebClient and RestClient Configurations in CoApi](/ahoo-wang/coapi/customize-coapi-webclient-restclient-configuration)

Customize CoApi WebClient and RestClient configurations via application.yml, customizers, or by replacing beans. Take full control of your HTTP clients.

- Tags: how-to-guide
- Published: 2026-02-23

### [CoApi ClientMode Configuration: Choosing Between REACTIVE, SYNC, and AUTO](/ahoo-wang/coapi/coapi-clientmode-reactive-sync-auto-explanation)

Understand CoApi ClientMode: REACTIVE, SYNC, and AUTO. Learn how to choose the best mode for your application to optimize performance and resource usage.

- Tags: deep-dive
- Published: 2026-02-23

### [CoApi vs Spring Cloud OpenFeign: Reactive HTTP Client Support Compared](/ahoo-wang/coapi/coapi-vs-spring-cloud-openfeign-reactive-support)

Compare CoApi and Spring Cloud OpenFeign for reactive HTTP client support. Discover CoApi's native WebFlux integration versus OpenFeign's unmaintained reactive solution.

- Tags: comparison
- Published: 2026-02-23