Java enterprises have thousands of REST endpoints. Turn your Spring Boot controllers into Model Context Protocol (MCP) tools dynamically via OpenAPI and wmcp.sh, without adding heavyweight custom MCP servers.
Rewriting a complex, secure, mature Spring Boot backend into an MCP-native server is a massive undertaking. Java developers often struggle with integrating modern agent frameworks seamlessly. But you don't have to rewrite your app.
Using springdoc-openapi, you can extract the exact parameters, validation rules, and security contexts of your endpoints. wmcp.sh parses this spec and serves it as native MCP tools.
// Java - Spring Boot Controller
import org.springframework.web.bind.annotation.*;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.tags.Tag;
@RestController
@RequestMapping("/api/customers")
@Tag(name = "agent")
public class CustomerController {
@PostMapping
@Operation(summary = "Create a customer", description = "Registers a new enterprise customer.")
public Customer createCustomer(@RequestBody CustomerDto dto) {
return customerService.create(dto);
}
}
# Pass the generated spec to wmcp.sh
curl -X GET "https://wmcp.sh/api/v1/tools?url=https://your-java-app.com/v3/api-docs&tag=agent"| Capability | Custom Java MCP Server | With wmcp.sh |
|---|---|---|
| Architecture | ⚠️ Runs alongside or inside your app | ✅ External proxy via OpenAPI |
| Spring Security | ❌ Must adapt to MCP transport | ✅ HTTP Authorization headers work normally |
| Validation | ⚠️ Duplicate @Valid rules to JSON schema | ✅ JSR-303 validations map to OpenAPI automatically |
| Integration cost | ⚠️ High (custom dependencies) | ✅ Zero (relies entirely on REST) |
Use the springdoc-openapi-starter-webmvc-ui dependency. It automatically scans your @RestController classes and generates a Swagger UI and a machine-readable JSON/YAML spec.
spring-ai-mcp is a dedicated framework for building AI functionality in Java. wmcp.sh is a language-agnostic edge gateway: you keep your existing standard REST endpoints, and wmcp.sh translates them into MCP tools for any client.
Add @SecurityRequirement to your OpenAPI endpoints. wmcp.sh will forward the provided credentials (like a JWT) in the Authorization header, allowing your standard Spring Security filters to validate them.
Yes. Group them by OpenAPI tags using the @Tag annotation in Spring, then pass ?tag=agent to wmcp.sh when configuring your MCP tools.
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