# doublespeed — Xcode as an API (npm · @doublespeed/mcp)

Build, test and run iOS apps on a remote Mac from any machine. XcodeBuildMCP-compatible tools.

- Trust score: 79/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- npm · `@doublespeed/mcp`: 79/100 (this document), [markdown](https://verifymcp.io/servers/ai-doublespeed-mcp/doublespeed-mcp.md), [page](https://verifymcp.io/servers/ai-doublespeed-mcp/doublespeed-mcp)

## Channel facts

- Registry: `npm`
- Package: `@doublespeed/mcp`
- Version: `0.1.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 31 of 96 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 23 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 70/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 1583 tokens (~143/item across 11 items; 11 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 77/100
  - Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 96/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 87% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 11 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 11 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the doublespeed — Xcode as an API MCP server?

doublespeed — Xcode as an API runs locally as an npm package, launched with npx -y @doublespeed/mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add ai-doublespeed-mcp -- npx -y @doublespeed/mcp
```

### Cursor

```json
{
  "mcpServers": {
    "ai-doublespeed-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@doublespeed/mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ai-doublespeed-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@doublespeed/mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add ai-doublespeed-mcp -- npx -y @doublespeed/mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ai-doublespeed-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@doublespeed/mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ai-doublespeed-mcp --command npx --arg -y --arg @doublespeed/mcp
```

### Hermes

```yaml
mcp_servers:
  ai-doublespeed-mcp:
    command: "npx"
    args: ["-y", "@doublespeed/mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "ai-doublespeed-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "@doublespeed/mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add ai-doublespeed-mcp -t stdio -c npx -a -y @doublespeed/mcp
```

### Other

```json
{
  "mcpServers": {
    "ai-doublespeed-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@doublespeed/mcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-19 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 60 to 63. That category is still filling its 30-day observation window: 18 days of observed history at the previous scan, 19 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 77, +1)

No change was recorded against any check on this day. Stability & Change Management went from 53 to 57. That category is still filling its 30-day observation window: 16 days of observed history at the previous scan, 17 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-12 (score 76, +1)

No change was recorded against any check on this day. Stability & Change Management went from 47 to 50. That category is still filling its 30-day observation window: 14 days of observed history at the previous scan, 15 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-10 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 40 to 43. That category is still filling its 30-day observation window: 12 days of observed history at the previous scan, 13 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-08 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-06 (score 73, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-05 (score 72, +3)

- [functional improvement] Stability: unverified → 0.27

## MCP tools (11)

### `discover_projs` (~67 tokens)

Discover Xcode projects

Scan a directory for .xcworkspace, .xcodeproj and Package.swift (skipping node_modules, Pods, .build, DerivedData). Local; no Mac needed.

Input parameters:

- `maxDepth` (number)
- `workspaceRoot` (string): Directory to scan (default: cwd)

### `list_schemes` (~67 tokens)

List schemes

List shared schemes of a project or workspace by reading xcshareddata (local). Unshared schemes are not visible; if none are listed, ds infers the scheme from the app target on the Mac.

Input parameters:

- `projectPath` (string)
- `workspacePath` (string)

### `list_sims` (~28 tokens)

List simulators

List simulator devices, iOS runtimes and Xcode versions available on the doublespeed fleet.

### `check_project` (~185 tokens)

Check project on a Mac (no API key needed)

Lint-only check on a real Mac: resolves the project/workspace/package and schemes with xcodebuild -list, parses every Swift file with swiftc (syntax, file:line:col), lints plists. Does NOT compile. Works without DS_API_KEY (keyless trial: 10 per day per address, 25 MB snapshot). Use this to validate structure before asking the user for a key; use build_sim/test_sim for a real build.

Input parameters:

- `projectPath` (string): Path to the .xcodeproj (omit for a workspace or a Swift package)
- `workspacePath` (string): Path to the .xcworkspace (CocoaPods / React Native projects)
- `workspaceRoot` (string): Directory to upload as the project root (default: the directory containing the project/workspace, or the current directory). Only files under it are sent.

### `build_sim` (~272 tokens)

Build for iOS Simulator

Compile the project for the iOS Simulator on a Mac in the doublespeed fleet. Returns file:line:col errors. Use when there is no Xcode locally.

Input parameters:

- `collectApp` (boolean): Also upload the built .app as an artifact
- `configuration` (string): Debug or Release (default: what the scheme defines)
- `extraArgs` (array): Extra `ds xcode` flags, e.g. ['--setting', 'CODE_SIGNING_ALLOWED=NO', '--timeout', '3600']
- `projectPath` (string): Path to the .xcodeproj (omit for a workspace or a Swift package)
- `scheme` (string): Scheme to build; inferred when the project has exactly one app scheme
- `simulatorName` (string): Simulator device name, e.g. 'iPhone 16 Pro' (default iPhone 16)
- `workspacePath` (string): Path to the .xcworkspace (CocoaPods / React Native projects)
- `workspaceRoot` (string): Directory to upload as the project root (default: the directory containing the project/workspace, or the current directory). Only files under it are sent.
- `xcodeVersion` (string): Required Xcode major or exact version, e.g. '16' or '16.4'

### `test_sim` (~285 tokens)

Run tests on iOS Simulator

Build and run XCTest / Swift Testing on an iOS Simulator on the doublespeed fleet. Returns per-test results and compile errors.

Input parameters:

- `configuration` (string): Debug or Release (default: what the scheme defines)
- `extraArgs` (array): Extra `ds xcode` flags, e.g. ['--setting', 'CODE_SIGNING_ALLOWED=NO', '--timeout', '3600']
- `onlyTesting` (array): XCTest identifiers to run, e.g. ['AppTests/CounterTests']
- `projectPath` (string): Path to the .xcodeproj (omit for a workspace or a Swift package)
- `scheme` (string): Scheme to build; inferred when the project has exactly one app scheme
- `simulatorName` (string): Simulator device name, e.g. 'iPhone 16 Pro' (default iPhone 16)
- `skipTesting` (array)
- `testPlan` (string)
- `workspacePath` (string): Path to the .xcworkspace (CocoaPods / React Native projects)
- `workspaceRoot` (string): Directory to upload as the project root (default: the directory containing the project/workspace, or the current directory). Only files under it are sent.
- `xcodeVersion` (string): Required Xcode major or exact version, e.g. '16' or '16.4'

### `build_run_sim` (~305 tokens)

Build and run in a live simulator

Build, install and launch the app in an iOS Simulator on the fleet and return a browser URL where a human can see and use it (tap, type, swipe). The session stays open until stop_app_sim or the idle timeout. Billed per second while open.

Input parameters:

- `configuration` (string): Debug or Release (default: what the scheme defines)
- `extraArgs` (array): Extra `ds xcode` flags, e.g. ['--setting', 'CODE_SIGNING_ALLOWED=NO', '--timeout', '3600']
- `idleTimeoutSeconds` (number): End the session after this long with no viewer activity (60–7200, default 900)
- `projectPath` (string): Path to the .xcodeproj (omit for a workspace or a Swift package)
- `scheme` (string): Scheme to build; inferred when the project has exactly one app scheme
- `simulatorName` (string): Simulator device name, e.g. 'iPhone 16 Pro' (default iPhone 16)
- `workspacePath` (string): Path to the .xcworkspace (CocoaPods / React Native projects)
- `workspaceRoot` (string): Directory to upload as the project root (default: the directory containing the project/workspace, or the current directory). Only files under it are sent.
- `xcodeVersion` (string): Required Xcode major or exact version, e.g. '16' or '16.4'

### `stop_app_sim` (~43 tokens)

Stop a simulator session

End a live simulator session started by build_run_sim (frees the Mac; stops billing).

Input parameters:

- `jobId` (string, required): Job id returned by build_run_sim

### `archive_app` (~247 tokens)

Archive (.xcarchive)

Produce an unsigned .xcarchive for the device SDK on the fleet (Release). Signing and TestFlight upload are not available yet.

Input parameters:

- `configuration` (string): Debug or Release (default: what the scheme defines)
- `extraArgs` (array): Extra `ds xcode` flags, e.g. ['--setting', 'CODE_SIGNING_ALLOWED=NO', '--timeout', '3600']
- `projectPath` (string): Path to the .xcodeproj (omit for a workspace or a Swift package)
- `scheme` (string): Scheme to build; inferred when the project has exactly one app scheme
- `simulatorName` (string): Simulator device name, e.g. 'iPhone 16 Pro' (default iPhone 16)
- `workspacePath` (string): Path to the .xcworkspace (CocoaPods / React Native projects)
- `workspaceRoot` (string): Directory to upload as the project root (default: the directory containing the project/workspace, or the current directory). Only files under it are sent.
- `xcodeVersion` (string): Required Xcode major or exact version, e.g. '16' or '16.4'

### `job_status` (~53 tokens)

Job status / logs

Fetch a previous job (status, error, diagnostics, tests) and optionally its log tail.

Input parameters:

- `jobId` (string, required)
- `logLines` (number): Return the last N log lines (default 0)

### `doctor` (~31 tokens)

Doctor

Check that this machine can reach the doublespeed fleet: key present, API reachable, fleet capabilities, ds CLI version.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/ai-doublespeed-mcp/doublespeed-mcp#diagnostics

## Score history

- 2026-09-20: 79
- 2026-09-19: 79
- 2026-09-18: 78
- 2026-09-17: 78
- 2026-09-16: 78
- 2026-09-15: 77
- 2026-09-14: 77
- 2026-09-13: 76
- 2026-09-12: 76
- 2026-09-11: 75
- 2026-09-10: 75
- 2026-09-09: 74
- 2026-09-08: 74
- 2026-09-07: 73
- 2026-09-06: 73
- 2026-09-05: 72
- 2026-09-04: 69
- 2026-09-03: 69
- 2026-09-02: 69
- 2026-09-01: 69
- 2026-08-31: 69
- 2026-08-30: 69
- 2026-08-29: 69
- 2026-08-28: 54

## Common questions

### What is the doublespeed — Xcode as an API MCP server?

doublespeed — Xcode as an API is an MCP server listed in the public MCP registry as ai.doublespeed/mcp. Build, test and run iOS apps on a remote Mac from any machine. XcodeBuildMCP-compatible tools. This page covers its npm package (@doublespeed/mcp).

### Is the doublespeed — Xcode as an API MCP server safe to use?

doublespeed — Xcode as an API scores 79 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the doublespeed — Xcode as an API MCP server expose?

doublespeed — Xcode as an API exposes 11 tools: discover_projs, list_schemes, list_sims, check_project, build_sim, and 6 more. Their descriptions and schemas cost roughly 1,583 tokens of context every time the server is loaded.

### Is the doublespeed — Xcode as an API MCP server still maintained?

doublespeed — Xcode as an API is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the doublespeed — Xcode as an API MCP server under?

doublespeed — Xcode as an API declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/@doublespeed/mcp
- Socket report: https://socket.dev/npm/package/@doublespeed/mcp
- Repository: https://github.com/doublespeed-main/mcp
- Website: https://mac.doublespeed.ai/
- Changelog RSS feed: https://verifymcp.io/servers/ai-doublespeed-mcp/doublespeed-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/ai-doublespeed-mcp/doublespeed-mcp.json
- HTML version of this page: https://verifymcp.io/servers/ai-doublespeed-mcp/doublespeed-mcp