Proxy Upstream MCP server through Unla

[murugan1703]

I am setting up Unla and have onboarded an existing upstream MCP endpoint.
Upstream MCP is having multiple tools. Not sure if i need to define all the tools available in upstream MCP server in Unla or we can proxy it. Tried both the options and have some queries on it.
Case 1:
I tried to add one of the upstream MCP server tool in Unla and when i tested it via Postman MCP client- I was able to connect to Unla endpoint and when i pass the request , request payload is not sent from Unla to upstream. Do i need to make any change in the way i pass the payload to upstream.
File : apiVersion: v1 kind: ConfigMap metadata: name: unla-proxy-bootstrap data: bootstrap.json: |- [ { "name": "test-mcp-server", "tenant": "default", "routers": [ { "server": "test-mcp-server", "prefix": "/test-mcp", "cors": { "allowOrigins": [ "*" ], "allowMethods": [ "GET", "POST", "PUT", "OPTIONS" ], "allowHeaders": [ "Content-Type", "Authorization", "Mcp-Session-Id", "mcp-protocol-version" ], "exposeHeaders": [ "Mcp-Session-Id", "mcp-protocol-version" ], "allowCredentials": true } } ], "servers": [ { "name": "test-mcp-server", "description": "test MCP Server", "allowedTools": [ "product-search" ] } ], "tools": [ { "name": "product-search", "description": "Get product details by its name", "method": "POST", "args": [ { "name": "searchTerms", "position": "body", "required": true, "type": "string", "description": "Search terms", "default": "" }, { "name": "context", "position": "body", "required": false, "type": "string", "description": "Optional context", "default": "" } ], "endpoint": "https://example.com/test-ai-mcp/mcp", "headers": { "Content-Type": "application/json", "Accept": "application/json, text/event-stream", "Authorization": "${request.headers.Authorization}", "Mcp-Session-Id": "${request.headers.Mcp-Session-Id}", "mcp-protocol-version": "${request.headers.mcp-protocol-version}" }, "body": { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "tool": "product-search", "arguments": { "searchTerms": "refrigerator", // hardcoded for testing , "context": "refrigerator" // hardcoded for testing } } } } ] } ]

**Logs:** {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"202","Content-Type":"application/json","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:00","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:7759"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/response.go:85","msg":"sending success response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","request_id":0,"method":"initialize","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","is_sse":false} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/response.go:181","msg":"sending HTTP response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","id":0,"session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","data_size":300} {"level":"info","time":"2025-11-19 10:14:00","caller":"core/middleware.go:78","msg":"request completed successfully","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","status":200,"size":323,"latency":0.000520738,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:00 | 200 | 541.15µs | 11.22.33.44 | POST "/test-mcp/mcp" {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12240","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"54","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:00","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12240","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:12240"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:00","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"info","time":"2025-11-19 10:14:00","caller":"core/middleware.go:78","msg":"request completed successfully","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12240","user_agent":"node","status":202,"size":-1,"latency":0.000209534,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:00 | 202 | 227.027µs | 11.22.33.44 | POST "/test-mcp/mcp" {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"46","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:7759"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/tool.go:330","msg":"fetching HTTP tool list","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/tool.go:343","msg":"fetched tool list","prefix":"/test-mcp","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","tool_count":3} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/response.go:85","msg":"sending success response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","request_id":1,"method":"tools/list","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","is_sse":false} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/response.go:181","msg":"sending HTTP response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","id":1,"session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","data_size":680} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:78","msg":"request completed successfully","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7759","user_agent":"node","status":200,"size":703,"latency":0.000276717,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:01 | 200 | 291.033µs | 11.22.33.44 | POST "/test-mcp/mcp" {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:20670","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"48","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:20670","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:20670"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/response.go:85","msg":"sending success response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:20670","user_agent":"node","request_id":3,"method":"prompts/list","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","is_sse":false} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/response.go:181","msg":"sending HTTP response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:20670","user_agent":"node","id":3,"session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","data_size":48} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:78","msg":"request completed successfully","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:20670","user_agent":"node","status":200,"size":71,"latency":0.00034499,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:01 | 200 | 359.502µs | 11.22.33.44 | POST "/test-mcp/mcp" {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/middleware.go:41","msg":"request details","method":"GET","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:64665","user_agent":"node","query":"","headers":{"Accept":"text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:48","msg":"request started","method":"GET","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:64665","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:64665"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7880","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"60","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7880","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:7880"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"warn","time":"2025-11-19 10:14:01","caller":"core/response.go:18","msg":"sending protocol error","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7880","user_agent":"node","id":4,"message":"Method not found","status_code":404,"error_code":-32601,"remote_addr":"11.22.33.44:7880"} {"level":"warn","time":"2025-11-19 10:14:01","caller":"core/middleware.go:70","msg":"request completed with client error","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:7880","user_agent":"node","status":404,"size":77,"latency":0.000217799,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:01 | 404 | 234.495µs | 11.22.33.44 | POST "/test-mcp/mcp" {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:54954","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"50","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:01","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:54954","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:54954"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:01","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"warn","time":"2025-11-19 10:14:01","caller":"core/response.go:18","msg":"sending protocol error","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:54954","user_agent":"node","id":2,"message":"Method not found","status_code":404,"error_code":-32601,"remote_addr":"11.22.33.44:54954"} {"level":"warn","time":"2025-11-19 10:14:01","caller":"core/middleware.go:70","msg":"request completed with client error","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:54954","user_agent":"node","status":404,"size":77,"latency":0.000213105,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:01 | 404 | 230.811µs | 11.22.33.44 | POST "/test-mcp/mcp" {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12593","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"149","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 10:14:17","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12593","user_agent":"node"} {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/server.go:170","msg":"routing request","path":"/test-mcp/mcp","prefix":"/test-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:12593"} {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-mcp"} {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-mcp"} {"level":"info","time":"2025-11-19 10:14:17","caller":"core/tool.go:353","msg":"invoking HTTP tool","tool":"product-search","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","remote_addr":"11.22.33.44:12593"} {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/tool.go:383","msg":"tool arguments","tool":"product-search","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","arguments":"{\"context\":\"refrigerator\",\"searchTerms\":\"refrigerator\"}"} {"level":"info","time":"2025-11-19 10:14:17","caller":"core/tool.go:190","msg":"executing HTTP tool","tool":"product-search","method":"POST","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","remote_addr":"11.22.33.44:12593"} {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/tool.go:217","msg":"tool request details","tool":"product-search","url":"https://example.com/test-ai-mcp/mcp","method":"POST","headers":{"Accept":["application/json, text/event-stream"],"Accept-Encoding":["gzip, deflate"],"Accept-Language":["*"],"Authorization":["${request.headers.Authorization}"],"Connection":["keep-alive"],"Content-Length":["149"],"Content-Type":["application/json"],"Mcp-Protocol-Version":["${request.headers.mcp-protocol-version}"],"Mcp-Session-Id":["${request.headers.Mcp-Session-Id}"],"Sec-Fetch-Mode":["cors"],"User-Agent":["node"]}} {"level":"debug","time":"2025-11-19 10:14:17","caller":"core/tool.go:236","msg":"sending HTTP request","tool":"product-search","url":"https://example.com/test-ai-mcp/mcp","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009"} {"level":"debug","time":"2025-11-19 10:14:20","caller":"core/tool.go:267","msg":"received HTTP response","tool":"product-search","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","response_body":"{\"jsonrpc\":\"2.0\",\"error\":{\"code\":-32700,\"message\":\"Parse error\",\"data\":\"[\\n {\\n \\\"code\\\": \\\"invalid_union\\\",\\n \\\"unionErrors\\\": [\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_literal\\\",\\n \\\"expected\\\": \\\"2.0\\\",\\n \\\"path\\\": [\\n \\\"jsonrpc\\\"\\n ],\\n \\\"message\\\": \\\"Invalid literal value, expected \\\\\\\"2.0\\\\\\\"\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_union\\\",\\n \\\"unionErrors\\\": [\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"string\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n },\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"number\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n }\\n ],\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Invalid input\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"string\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"method\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n },\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_literal\\\",\\n \\\"expected\\\": \\\"2.0\\\",\\n \\\"path\\\": [\\n \\\"jsonrpc\\\"\\n ],\\n \\\"message\\\": \\\"Invalid literal value, expected \\\\\\\"2.0\\\\\\\"\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"string\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"method\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n },\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_literal\\\",\\n \\\"expected\\\": \\\"2.0\\\",\\n \\\"path\\\": [\\n \\\"jsonrpc\\\"\\n ],\\n \\\"message\\\": \\\"Invalid literal value, expected \\\\\\\"2.0\\\\\\\"\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_union\\\",\\n \\\"unionErrors\\\": [\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"string\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n },\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"number\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n }\\n ],\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Invalid input\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"object\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"result\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n },\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_literal\\\",\\n \\\"expected\\\": \\\"2.0\\\",\\n \\\"path\\\": [\\n \\\"jsonrpc\\\"\\n ],\\n \\\"message\\\": \\\"Invalid literal value, expected \\\\\\\"2.0\\\\\\\"\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_union\\\",\\n \\\"unionErrors\\\": [\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"string\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n },\\n {\\n \\\"issues\\\": [\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"number\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n }\\n ],\\n \\\"path\\\": [\\n \\\"id\\\"\\n ],\\n \\\"message\\\": \\\"Invalid input\\\"\\n },\\n {\\n \\\"code\\\": \\\"invalid_type\\\",\\n \\\"expected\\\": \\\"object\\\",\\n \\\"received\\\": \\\"undefined\\\",\\n \\\"path\\\": [\\n \\\"error\\\"\\n ],\\n \\\"message\\\": \\\"Required\\\"\\n }\\n ],\\n \\\"name\\\": \\\"ZodError\\\"\\n }\\n ],\\n \\\"path\\\": [],\\n \\\"message\\\": \\\"Invalid input\\\"\\n }\\n]\"},\"id\":null}","status":400} {"level":"info","time":"2025-11-19 10:14:20","caller":"core/tool.go:284","msg":"tool execution completed successfully","tool":"product-search","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","status":400} {"level":"info","time":"2025-11-19 10:14:20","caller":"core/tool.go:411","msg":"tool invocation completed successfully","tool":"product-search","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009"} {"level":"debug","time":"2025-11-19 10:14:20","caller":"core/response.go:85","msg":"sending success response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12593","user_agent":"node","request_id":5,"method":"tools/call","session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","is_sse":false} {"level":"debug","time":"2025-11-19 10:14:20","caller":"core/response.go:181","msg":"sending HTTP response","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12593","user_agent":"node","id":5,"session_id":"f8d6357e-a0f4-4833-803b-1e2f7879b009","data_size":89} {"level":"info","time":"2025-11-19 10:14:20","caller":"core/middleware.go:78","msg":"request completed successfully","method":"POST","path":"/test-mcp/mcp","remote_addr":"11.22.33.44:12593","user_agent":"node","status":200,"size":112,"latency":3.428496052,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 10:14:20 | 200 | 3.428518742s | 11.22.33.44 | POST "/test-mcp/mcp"

Case2:
I tried to proxy the upstream MCP server by creating routes and server . With this , i was able to connect to the Unla MCP endpoint but i could see "No tools were found on this server" in my Postman. Not sure what changes i need to do to make it as proxy.

Configmap file : apiVersion: v1 kind: ConfigMap metadata: name: unla-proxy-bootstrap data: bootstrap.json: |- [ { "name": "test-mcp-proxy", "routers": [ { "server": "product-search", "prefix": "/test-ai-mcp", "cors": { "allowOrigins": ["*"], "allowMethods": ["GET","POST","PUT","DELETE","PATCH","OPTIONS"], "allowHeaders": ["Content-Type","Mcp-Session-Id","mcp-protocol-version"], "exposeHeaders": ["Mcp-Session-Id","mcp-protocol-version"], "allowCredentials": true } } ], "servers": [ { "name": "product-search", "url": "https://example.com/test-ai-mcp/mcp" } ], "routes": [ { "name": "product-search", "upstream": "product-search", "methods": ["GET","POST","PUT","DELETE","PATCH","OPTIONS"], "strip_path": true, "preserve_host": true, "preserve_request_body": true, } ] } ]

**Logs:** {"level":"info","time":"2025-11-19 09:26:53","caller":"core/server.go:301","msg":"getting updated MCP configurations","count":1} {"level":"info","time":"2025-11-19 09:26:53","caller":"core/server.go:307","msg":"merging updated MCP configurations","total_old":1,"total_new":1} {"level":"info","time":"2025-11-19 09:26:53","caller":"core/server.go:326","msg":"initializing server state"} {"level":"info","time":"2025-11-19 09:26:53","caller":"state/state.go:81","msg":"registered router","tenant":"","prefix":"/test-ai-mcp","server":"product-search"} {"level":"info","time":"2025-11-19 09:26:53","caller":"core/server.go:334","msg":"server configuration loaded","server_count":1,"tool_count":0,"router_count":1} {"level":"info","time":"2025-11-19 09:26:53","caller":"core/server.go:358","msg":"Configuration reloaded successfully"} {"level":"debug","time":"2025-11-19 09:26:56","caller":"core/middleware.go:41","msg":"request details","method":"POST","path":"/test-ai-mcp/mcp","remote_addr":"11.22.33.44:11754","user_agent":"node","query":"","headers":{"Accept":"application/json, text/event-stream","Accept-Encoding":"gzip, deflate","Accept-Language":"*","Connection":"keep-alive","Content-Length":"96","Content-Type":"application/json","Mcp-Protocol-Version":"2024-11-05","Mcp-Session-Id":"d85ec0b4-ed9b-4a1d-a25d-2ba8b7770e83","Sec-Fetch-Mode":"cors","User-Agent":"node"}} {"level":"info","time":"2025-11-19 09:26:56","caller":"core/middleware.go:48","msg":"request started","method":"POST","path":"/test-ai-mcp/mcp","remote_addr":"11.22.33.44:11754","user_agent":"node"} {"level":"debug","time":"2025-11-19 09:26:56","caller":"core/server.go:170","msg":"routing request","path":"/test-ai-mcp/mcp","prefix":"/test-ai-mcp","endpoint":"mcp","remote_addr":"11.22.33.44:11754"} {"level":"debug","time":"2025-11-19 09:26:56","caller":"core/server.go:192","msg":"applying CORS middleware","prefix":"/test-ai-mcp"} {"level":"debug","time":"2025-11-19 09:26:56","caller":"core/server.go:223","msg":"handling MCP endpoint","prefix":"/test-ai-mcp"} {"level":"info","time":"2025-11-19 09:26:56","caller":"core/tool.go:353","msg":"invoking HTTP tool","tool":"product-search","session_id":"d85ec0b4-ed9b-4a1d-a25d-2ba8b7770e83","remote_addr":"11.22.33.44:11754"} {"level":"warn","time":"2025-11-19 09:26:56","caller":"core/tool.go:361","msg":"tool not found","tool":"product-search","session_id":"d85ec0b4-ed9b-4a1d-a25d-2ba8b7770e83","remote_addr":"11.22.33.44:11754"} {"level":"warn","time":"2025-11-19 09:26:56","caller":"core/response.go:18","msg":"sending protocol error","method":"POST","path":"/test-ai-mcp/mcp","remote_addr":"11.22.33.44:11754","user_agent":"node","id":5,"message":"Tool not found","status_code":404,"error_code":-32601,"remote_addr":"11.22.33.44:11754"} {"level":"debug","time":"2025-11-19 09:26:56","caller":"core/response.go:85","msg":"sending success response","method":"POST","path":"/test-ai-mcp/mcp","remote_addr":"11.22.33.44:11754","user_agent":"node","request_id":5,"method":"tools/call","session_id":"d85ec0b4-ed9b-4a1d-a25d-2ba8b7770e83","is_sse":false} {"level":"debug","time":"2025-11-19 09:26:56","caller":"core/response.go:181","msg":"sending HTTP response","method":"POST","path":"/test-ai-mcp/mcp","remote_addr":"11.22.33.44:11754","user_agent":"node","id":5,"session_id":"d85ec0b4-ed9b-4a1d-a25d-2ba8b7770e83","data_size":38} [GIN-debug] [WARNING] Headers were already written. Wanted to override status code 404 with 200 {"level":"warn","time":"2025-11-19 09:26:56","caller":"core/middleware.go:70","msg":"request completed with client error","method":"POST","path":"/test-ai-mcp/mcp","remote_addr":"11.22.33.44:11754","user_agent":"node","status":404,"size":136,"latency":0.000355722,"client_ip":"11.22.33.44"} [GIN] 2025/11/19 - 09:26:56 | 404 | 387.465µs | 11.22.33.44 | POST "/test-ai-mcp/mcp"