doublespeed — Xcode as an API
Build, test and run iOS apps on a remote Mac from any machine. XcodeBuildMCP-compatible tools.
Runs on your machine from its package; the steps are below.
What it does
- Reads
- Writes
- High impact
At most: moves money, runs code or commands, deletes data, or sends messages for you.
What it costs
FreeOdel charges nothing per call. The publisher may charge for its own service.
Runs locally over stdio
This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).
Run
npx -y @doublespeed/mcp
MCP client config
{
"mcpServers": {
"doublespeed-xcode-as-an-api": {
"command": "npx",
"args": [
"-y",
"@doublespeed/mcp"
]
}
}
}@doublespeed/mcp
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.
Install
Needs Node 20+. check_project works with no key at all; everything else needs a DS_API_KEY (free $100 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_..." } } } }
Tools
| 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.
Not yet
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
