How can I receive "env" properties in java sdk?

[zbn1120]

I config in cursor as the image:

how can I get property "test" in java mcp tools

[Fj-ivy]

You can get env property value by System.getenv().get(key);. the key is test

[zbn1120]

@Fj-ivy I write a mcp tool to test like this:

and I run it in cursor, but just got null

[codeboyzhou]

@Fj-ivy I write a mcp tool to test like this:

and I run it in cursor, but just got null

@zbn1120
You are using with HTTP SSE Transport.
The env configuration and System.getenv() method is used for MCP Server with STDIO Transport.
If you want to transfer some variables in the env configuration, try using MCP Server with STDIO Transport.

[zbn1120]

@Fj-ivy I write a mcp tool to test like this:

and I run it in cursor, but just got null

@zbn1120 You are using with HTTP SSE Transport. The env configuration and System.getenv() method is used for MCP Server with STDIO Transport. If you want to transfer some variables in the env configuration, try using MCP Server with STDIO Transport.

I got it,thank you so much

[codeboyzhou]

happy to help, thank you for trying out MCP.

[big-mouth-cn]

If insisting on the SSE Server environment, how can I obtain it?

[codeboyzhou]

If insisting on the SSE Server environment, how can I obtain it?

Perhaps set your OS environment variables, or put them in the image if you are using Docker.

[big-mouth-cn]

If insisting on the SSE Server environment, how can I obtain it?

Perhaps set your OS environment variables, or put them in the image if you are using Docker.

It is possible that my expression was incorrect. I want the MCP Server to receive parameters passed from the Client, such as the user's API_KEY, and interact through the SSE protocol.

[codeboyzhou]

@big-mouth-cn Then put them in the HTTP Headers, SSE is not a protocol, it's still HTTP protocol essentially.

[big-mouth-cn]

@big-mouth-cn Then put them in the HTTP Headers, SSE is not a protocol, it's still HTTP protocol essentially.

How can I retrieve it from HTTP headers in a method in Java?

e.g. header Authorization

[codeboyzhou]

@big-mouth-cn First, you need to confirm the MCP client you are using support custom HTTP Headers feature, and then you can handle the request headers in the server like a regular web application, for example, based on Spring Boot, that is to say, all the request headers processing ways for regular Spring web applications are also apply here, for example, Spring Interceptor, RequestContextHolder, something like that.

[big-mouth-cn]

@big-mouth-cn First, you need to confirm the MCP client you are using support custom HTTP Headers feature, and then you can handle the request headers in the server like a regular web application, for example, based on Spring Boot, that is to say, all the request headers processing ways for regular Spring web applications are also apply here, for example, Spring Interceptor, RequestContextHolder, something like that.

Thank you for your reply. I'll take another look. Currently, using WebFilter doesn't work, it might be an issue with the client.

[koudaiDemon]

@big-mouth-cn First, you need to confirm the MCP client you are using support custom HTTP Headers feature, and then you can handle the request headers in the server like a regular web application, for example, based on Spring Boot, that is to say, all the request headers processing ways for regular Spring web applications are also apply here, for example, Spring Interceptor, RequestContextHolder, something like that.

When I Use RequestContextHolder For Get Parameter，But I got Null Object，I Use spring-ai-starter-mcp-server-webmvc:1.0.0-SNAPSHOT.