Build, test and run iOS apps on a remote Mac from any machine. XcodeBuildMCP-compatible tools.
An MCP server that gives a coding agent a Mac. Build, test, archive and run iOS apps — native, React Native, Expo — on the doublespeed Mac fleet from Linux, a container, CI, or a Mac without Xcode.
Tool names match XcodeBuildMCP (build_sim, test_sim, build_run_sim, list_sims, discover_projs, list_schemes, stop_app_sim, doctor) so prompts and skills written for a local Mac work unchanged when there is no Mac.
Needs Node 20+. check_project works with no key at all; everything else needs a DS_API_KEY (free $200 of Mac time at https://mac.doublespeed.ai/dashboard → API keys).
Claude Code
claude mcp add doublespeed -e DS_API_KEY=dsx_... -- npx -y @doublespeed/mcp
Cursor / Windsurf / Codex / VS Code — add to the client's MCP config:
{ "mcpServers": { "doublespeed": { "command": "npx", "args": ["-y", "@doublespeed/mcp"], "env": { "DS_API_KEY": "dsx_..." } } } }
| Tool | What it does | Where it runs |
|---|---|---|
discover_projs | find .xcworkspace / .xcodeproj / Package.swift | local |
list_schemes | shared schemes of a project/workspace | local |
list_sims | simulators, runtimes and Xcode versions on the fleet | API |
check_project | no key needed — schemes resolve, every Swift file parses, plists valid (lint, no compile) | Mac |
build_sim | compile for the iOS Simulator; file:line:col errors | Mac |
test_sim | build + XCTest / Swift Testing; per-test results | Mac |
build_run_sim | build, install, launch; returns a browser URL to a live simulator | Mac |
stop_app_sim | end a live session | API |
archive_app | unsigned .xcarchive (Release) | Mac |
job_status | status, diagnostics, tests, log tail of any job | API |
doctor | key, API reachability, fleet capabilities | local + API |
Only files under workspaceRoot (default: the project's directory) are uploaded, content-addressed — after the first run only changed files move. A small app's test run takes ~20–40 s of Mac time and costs a few cents; nothing is billed while queued.
Screenshots / accessibility tree of the running simulator, code signing and TestFlight upload. The live build_run_sim link is meant for a human to look at.
Agents without a Mac build, test and run iOS apps through mac.doublespeed.ai (npx -y @doublespeed/ds). Docs: https://mac.doublespeed.ai/docs.md
Source-derived launch command. Check the maintainer’s required arguments and credentials before running:
npx -y @doublespeed/mcpMerge this template into ~/Library/Application Support/Claude/claude_desktop_config.json. Keep existing servers. Add any arguments, credentials, and permissions required by the maintainer; this template has not been install-tested.
{
"mcpServers": {
"ai-doublespeed-mcp": {
"command": "npx",
"args": [
"-y",
"@doublespeed/mcp"
]
}
}
}Restart Claude Desktop completely for changes to take effect. Confirm the server appears connected in the client’s tool list, then try a read-only example from its documentation.
Claude Desktop setup reference@doublespeed/mcpnpmdoublespeed — Xcode as an API works with any MCP-compatible client. Copy the config snippet from the Configuration section above and add it to the file shown for your client, then restart the application.
~/Library/Application Support/Claude/claude_desktop_config.jsonRestart Claude Desktop completely for changes to take effect.~/.cursor/mcp.jsonRestart Cursor for changes to take effect..vscode/mcp.jsonReload VS Code window for changes to take effect.~/.codeium/windsurf/mcp_config.jsonRestart Windsurf for changes to take effect..mcp.jsonSave at the project root, then start Claude Code in that project and review the MCP server approval prompt. Keep real credentials out of shared files.