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https://issues.apache.org/jira/browse/CAMEL-26668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Work on CAMEL-26668 started by Claus Ibsen.
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> camel-mcp-server - polish the error responses on /mcp when a request fails
> --------------------------------------------------------------------------
>
> Key: CAMEL-26668
> URL: https://issues.apache.org/jira/browse/CAMEL-26668
> Project: Camel
> Issue Type: Improvement
> Components: camel-mcp-server
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Minor
> Fix For: 4.24.0
>
>
> The Camel Main engine of camel-mcp-server answers some failed requests on
> {{/mcp}} with a body that is not a proper JSON-RPC error response.
> {{VertxMcpStreamableServerTransportProvider.respondError}} writes the
> {{McpError}} Java object as JSON, which is used for:
> * 415 when the {{Content-Type}} is not {{application/json}};
> * 400 when the message cannot be parsed;
> * 404 when the session is not found;
> * 500 for an unknown message type.
> MCP clients expect a JSON-RPC error object there.
> *Proposal*
> * reply with a JSON-RPC error response without an {{id}}:
> {{\{"jsonrpc":"2.0","error":\{"code":<code>,"message":"<message>"\}\}}},
> built from the error code and a short fixed message;
> * keep the messages short and fixed, for example "Invalid message format"
> instead of the text of the parser;
> * use the same shape for the 403 of the origin check (CAMEL-26359) and the
> bad-request replies, so all error replies on {{/mcp}} look the same;
> * tests that check the body of each error reply.
> _Claude Code on behalf of Claus Ibsen (davsclaus)_
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