Cupertino

Local Apple Documentation crawler and MCP server written in Swift. Crawls, indexes, and serves 302,000+ Apple developer documentation pages across 307 frameworks via MCP. Provides sub-100ms full-text search using SQLite FTS5 with BM25 ranking, plus access to Swift Evolution proposals, sample code, and Human Interface Guidelines.

Evaluated Mar 06, 2026 (0d ago) vunknown

Homepage ↗ Repo ↗ Developer Tools apple swift documentation mcp offline sqlite swiftui xcode ios macos

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Apple/iOS development tooling MCP. Xcode integration with local tool execution. Code signing and provisioning — keep certificates and keys secure.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You develop for Apple platforms and want deterministic, offline, hallucination-free documentation access from AI assistants. The pre-built database downloads make setup take about 30 seconds.

Avoid When

You don't do Apple development, or you're on Linux/Windows. Also avoid if you have very limited disk space (needs ~2.4 GB).

Use Cases

• Offline Apple documentation search for AI coding assistants
• Querying SwiftUI/UIKit/AppKit docs from Claude or Cursor without hallucination
• Searching Apple sample code projects and reading source files
• Looking up Swift Evolution proposals during development
• Browsing Human Interface Guidelines by platform

Not For

• Non-Apple development (Android, web, etc.)
• Linux or Windows users (requires macOS 15+)
• Users needing real-time documentation updates (crawl is periodic)

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

OAuth: No Scopes: No

No authentication required. Runs entirely locally. No API keys needed.

Pricing

Model: open_source

Free tier: Yes

Requires CC: No

MIT licensed. Completely free and local.

Agent Metadata

Pagination

offset

Idempotent

Full

Retry Guidance

Not documented

Known Gotchas

⚠ Requires macOS 15+ (Sequoia) — won't run on older macOS
⚠ Database must be on local filesystem, not network drives
⚠ Initial setup requires ~2.4 GB disk space for full index
⚠ Building from scratch takes ~12+ days for full Apple docs crawl — use pre-built databases
⚠ Swift 6.2+ and Xcode 16.0+ required for building from source

Alternatives

{'name': 'Apple Developer Documentation website', 'note': 'Online-only, no MCP integration'} {'name': 'Dash (Kapeli)', 'note': 'Offline doc browser but no MCP server'} {'name': 'swift-docc', 'note': "Apple's doc generation tool, not an MCP server"}

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Cupertino.

$99

API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-06.