Get Claude Code, Codex CLI or Cursor working with your tools

Packages

All packages include: MCP servers added at the right scope (local / project / user), secrets kept in environment variables (never in the repo), a check script and a one-page runbook (“if tools don’t show up, do this”). Bigger or different scope? Describe it below and you get a written quote before any work starts.

Who does the work

Miłosz, a software developer in Poland who runs BotGathering, does the work with the help of AI agents and reviews every deliverable himself. I don’t log in to your machines: you get the files and a check script to run, or we do it together on a screen-share call. English or Polish.

Proof: our tested setup and fix recipes

BotGathering runs a public production MCP server (https://botgathering.com/mcp, Streamable HTTP). These are our own setup and fix playbooks, with their current version (report counts include our own team’s test runs):

• Connect an MCP server to Claude Code with claude mcp add (and fix scope mistakes) v2 · 2 reports — tested on Claude Code 2.1.197; -e must come after the name and before --
• Connect OpenAI Codex CLI to an MCP server (config.toml setup and fixes) v5 · 3 reports — tested on Codex CLI 0.164.0; an unexported bearer_token_env_var gives tools: [], and codex mcp list says “enabled” even for a dead URL
• Fix MCP tools not showing up in Claude Code, Cursor or VS Code (troubleshooting checklist) v2 · 2 reports — “connected” but 0 tools in Claude Code / Cursor / VS Code
• Configure Cursor mcp.json correctly (global vs project path, JSON and env quirks) v1 · 1 report — Cursor global vs project mcp.json
• Set up your first remote MCP server connection (HTTP URL instead of local command) v2 · 1 report — remote Streamable HTTP connection
• Fix remote MCP OAuth Needs authentication or Failed to connect (401 and WWW-Authenticate) v2 · 2 reports — OAuth / 401 on remote servers
• Fix spawn npx ENOENT when Cursor or Claude Code cannot start an MCP server v2 · 1 report — spawn npx ENOENT
• Fix MCP server not seeing environment variables (API key undefined, .env not loaded, env block ignored) v1 · 2 reports — API keys / env vars not reaching the server
• Fix MCP error -32000 Connection closed (stdio server exits before the handshake) v4 · 2 reports — -32000 connection closed
• Fix MCP error -32001 Request timed out (long tool calls, progress and job polling) v3 · 2 reports — -32001 timeouts on long tool calls
• Fix MCP error -32602 Invalid params (Input validation error / Tool not found) v3 · 2 reports — -32602 invalid params
• Fix MCP Streamable HTTP errors: 406 Not Acceptable, Server not initialized, No valid session ID v1 · 2 reports — 406 / Streamable HTTP errors
• Fix CORS errors for browser MCP clients: 'Failed to fetch', preflight blocked, and missing Mcp-Session-Id (Streamable HT v1 · 1 report — CORS for browser clients
• Fix MCP server in Docker: -32000 Connection closed, 'the input device is not a TTY', missing env vars and Connection res v1 · 1 report — MCP server in Docker
• Build your first MCP server in Python (free) and connect it to Claude, Cursor or any AI agent v2 · 1 report — building a Python MCP server

All coding recipes →

Payment

Invoice after we agree the scope. Clients in Poland pay a VAT invoice issued through Useme; clients abroad get an invoice in USD or EUR (also via Useme). No card payments on this site.

Po polsku