Proxy support

[Coda1304]

Hello everyone,

at work we have to use a proxy to connect to the internet. I didn't see any option to set a proxy in the documentation. I also tried to set the environment variables HTTP_PROXY and HTTPS_PROXY, but they were not respected. From my tests I assume that there is no official proxy support and therefore have two questions:

1. Is there any official proxy support which I missed? Maybe even some documentation?
2. Could proxy support be added?

Thank you very much.

The error log which I get at the moment:

2025-06-02 15:31:03.576 [warning] [server stderr] Error searching libraries: TypeError: fetch failed
2025-06-02 15:31:03.576 [warning] [server stderr] at node:internal/deps/undici/undici:13510:13
2025-06-02 15:31:03.576 [warning] [server stderr] at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
2025-06-02 15:31:03.576 [warning] [server stderr] at async searchLibraries (file:///app/dist/lib/api.js:12:26)
2025-06-02 15:31:03.576 [warning] [server stderr] at async file:///app/dist/index.js:55:28
2025-06-02 15:31:03.576 [warning] [server stderr] at async file:///app/node_modules/@modelcontextprotocol/sdk/dist/esm/server/mcp.js:84:30 {
2025-06-02 15:31:03.576 [warning] [server stderr] [cause]: Error: connect ECONNREFUSED 76.76.21.21:443
2025-06-02 15:31:03.576 [warning] [server stderr] at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1636:16) {
2025-06-02 15:31:03.576 [warning] [server stderr] errno: -111,
2025-06-02 15:31:03.576 [warning] [server stderr] code: 'ECONNREFUSED',
2025-06-02 15:31:03.576 [warning] [server stderr] syscall: 'connect',
2025-06-02 15:31:03.577 [warning] [server stderr] address: '76.76.21.21',
2025-06-02 15:31:03.577 [warning] [server stderr] port: 443
2025-06-02 15:31:03.577 [warning] [server stderr] }
2025-06-02 15:31:03.577 [warning] [server stderr] }

[enesgules]

Thanks for the recommendation. There is no official proxy support yet. We will add it as soon as we can

[clemux]

While looking at how to implement that because I really need it, I stumbled upon https://bun.sh/guides/http/proxy (I know nothing about nodejs). Since bun is mentioned in the doc, I figured I just had to run context7 with bun x instead of npx. However, I believe it still used the node runtime:

Error searching libraries: TypeError: fetch failed\n    at node:internal/deps/undici/undici:13510:13\n    at 
process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async searchLibraries (file:///tmp/
bunx-1000-@upstash/context7-mcp@latest/node_modules/@upstash/context7-mcp/dist/lib/api.js:12:26)\n    at async file:///
tmp/bunx-1000-@upstash/context7-mcp@latest/node_modules/@upstash/context7-mcp/dist/index.js:55:28\n    at async 
file:///tmp/bunx-1000-@upstash/context7-mcp@latest/node_modules/@modelcontextprotocol/sdk/dist/esm/server/
mcp.js:84:30 {\n  [cause]: Error: connect ENETUNREACH 76.76.21.21:443 - Local (0.0.0.0:0)\n      at internalConnect 
(node:net:1098:16)\n      at defaultTriggerAsyncIdScope (node:internal/async_hooks:464:18)\n      at 
GetAddrInfoReqWrap.emitLookup [as callback] (node:net:1497:9)\n      at GetAddrInfoReqWrap.onlookupall [as oncomplete] 
(node:dns:132:8) {\n    errno: -101,\n    code: 'ENETUNREACH',\n    syscall: 'connect',\n    address: '76.76.21.21',\n    port: 443\n  
}

However, by cloning the project and building it locally, I could run the mcp server with bun run dist/index.js and it correctly read my HTTPS_PROXY variable and makes the requests go through the proxy.

[enesakar]

@enesgules can you check the above? this sounds interesting