MCP Client / API Access Question (Atlassian + Playwright + Custom MCP)

[surekharapuru123]

Pre-submission Checklist

• I have checked that this question would not be more appropriate as an issue in a specific repository
• I have searched existing discussions and documentation for answers

Question Category

• Protocol Specification
• SDK Usage
• Server Implementation
• General Implementation
• Documentation
• Other

Your Question

Hi MCP community 👋

I’m currently using multiple MCP servers:

Atlassian MCP (Jira)

Playwright MCP

A custom MCP server for automation flows

These are working correctly when run via STDIO (for example from VS Code using MCP config).

🎯 What I’m trying to achieve

I want to access these MCP servers from my own chat agent via an API, so that:

My chat agent receives a user prompt

The agent calls MCP tools (Playwright / Jira / custom MCP)

The results are returned back to the chat agent over HTTP

Essentially, I’m trying to build an API bridge between my chat agent and MCP servers.

🚫 Problem I’m facing

When I try to use client or WebSocket-related modules from the MCP SDK, I get errors like:

Error: Cannot find module '.../dist/esm/index.js'

or similar issues when attempting imports related to:

WebSocket clients

MCP client SDK usage outside VS Code

This made me unsure whether:

MCP officially supports HTTP / WebSocket access

There is a supported client SDK for external agents

Or if MCP is STDIO-only by design

❓ Questions for the community

Is MCP intentionally STDIO-only, with no official WebSocket or HTTP interface?

Is there a recommended pattern to expose MCP tools to an external chat agent (e.g., via a custom HTTP bridge)?

Is there a supported client API in @modelcontextprotocol/sdk, or should we avoid importing client modules entirely?

Are there any reference implementations or best practices for running MCP servers outside VS Code?

✅ What I’m looking for

Confirmation of the correct architecture

Guidance on whether building an MCP → HTTP bridge is the intended approach

Any official docs, examples, or recommendations

Thanks in advance 🙏
This project is super promising, and I’d love to align with MCP’s intended usage patterns.

[surekharapuru123]

I am getting this error while use sdk client S C:\Surekha\MCP Projects\agent-mcp-api> node src/server.js
node:internal/modules/esm/resolve:274
throw new ERR_MODULE_NOT_FOUND(
^

Error [ERR_MODULE_NOT_FOUND]: Cannot find module 'C:\Surekha\MCP Projects\agent-mcp-api\node_modules@modelcontextprotocol\sdk\dist\esm\index.js' imported from C:\Surekha\MCP Projects\agent-mcp-api\src\mcp\index.js
at finalizeResolution (node:internal/modules/esm/resolve:274:11)
at moduleResolve (node:internal/modules/esm/resolve:859:10)
at defaultResolve (node:internal/modules/esm/resolve:983:11)
at ModuleLoader.defaultResolve (node:internal/modules/esm/loader:801:12)
at #cachedDefaultResolve (node:internal/modules/esm/loader:725:25)
at ModuleLoader.resolve (node:internal/modules/esm/loader:708:38)
at ModuleLoader.getModuleJobForImport (node:internal/modules/esm/loader:309:38)
at onImport.tracePromise.proto (node:internal/modules/esm/loader:659:36)
at TracingChannel.tracePromise (node:diagnostics_channel:344:14)
at ModuleLoader.import (node:internal/modules/esm/loader:658:21) {
code: 'ERR_MODULE_NOT_FOUND',
url: 'file:///C:/Surekha/MCP%20Projects/agent-mcp-api/node_modules/@modelcontextprotocol/sdk/dist/esm/index.js'
}
please check