Add custom headers at the start of the SSE client

Author: k33g

client/sse.go

@@ -94,6 +94,11 @@ func (c *SSEMCPClient) Start(ctx context.Context) error {
 	req.Header.Set("Cache-Control", "no-cache")
 	req.Header.Set("Connection", "keep-alive")
 
+	// set custom http headers
+	for k, v := range c.headers {
+		req.Header.Set(k, v)
+	}
+
 	resp, err := c.httpClient.Do(req)
 	if err != nil {
 		return fmt.Errorf("failed to connect to SSE stream: %w", err)