Midnight Mcp

Midnight MCP Server

[](https://www.npmjs.com/package/midnight-mcp) [](https://npm-stat.com/charts.html?package=midnight-mcp) [](./LICENSE) [](https://www.typescriptlang.org/) [](https://github.com/Olanetsoft/midnight-mcp/actions/workflows/ci.yml)

MCP server that gives AI assistants access to Midnight blockchain—search contracts, analyze code, and explore documentation.

This project extends the Midnight Network with additional developer tooling.

Requirements

• Node.js 20+ (LTS recommended)

Check your version: node --version

Using nvm? Click for Claude Desktop setup

If you use nvm, Claude Desktop may not see your nvm-managed Node. Use this config instead:

{
  "mcpServers": {
    "midnight": {
      "command": "/bin/sh",
      "args": [
        "-c",
        "source ~/.nvm/nvm.sh && nvm use 20 >/dev/null 2>&1 && npx -y midnight-mcp@latest"
      ]
    }
  }
}

Quick Start

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "midnight": {
      "command": "npx",
      "args": ["-y", "midnight-mcp@latest"]
    }
  }
}

Config file locations:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

Cursor

One-click install:

[](https://cursor.com/en-US/install-mcp?name=midnight&config=eyJjb21tYW5kIjoibnB4IC15IG1pZG5pZ2h0LW1jcEBsYXRlc3QifQ==)

Or manually add to .cursor/mcp.json:

{
  "mcpServers": {
    "midnight": {
      "command": "npx",
      "args": ["-y", "midnight-mcp@latest"]
    }
  }
}

VS Code Copilot

Add to .vscode/mcp.json or use Command Palette: MCP: Add Server → "command (stdio)" → npx -y midnight-mcp@latest

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "midnight": {
      "command": "npx",
      "args": ["-y", "midnight-mcp@latest"]
    }
  }
}

No API keys required. Restart your editor after adding the config.

> Why @latest? Unlike cached npx packages that never auto-update, @latest ensures you get new features and fixes on each restart. If upgrading from an older config without @latest, also clear your npx cache: rm -rf ~/.npm/_npx

---

What's Included

29 Tools

| Category | Tools | Description | | ----------------- | --------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------ | | Search | search-compact, search-typescript, search-docs, fetch-docs | Semantic search + live docs fetching | | Analysis | analyze-contract, explain-circuit, extract-contract-structure, compile-contract | Static analysis + real compilation | | Repository | get-file, list-examples, get-latest-updates | Access files and examples | | Versioning | get-version-info, check-breaking-changes, get-migration-guide, get-file-at-version, compare-syntax, get-latest-syntax | Version tracking and migration | | AI Generation | generate-contract, review-contract, document-contract | AI-powered code generation (requires sampling) | | Compound | upgrade-check, get-repo-context | Multi-step operations (saves 50-70% tokens) | | Health | health-check, get-status, check-version | Server status and version checking | | Discovery | list-tool-categories, list-category-tools, suggest-tool | Explore available tools and get recommendations |

All tools are prefixed with midnight- (e.g., midnight-search-compact).

Real Contract Compilation

The midnight-compile-contract tool validates Compact code using a hosted compiler service:

✅ Compilation successful (Compiler v0.29.0) in 2841ms

• Fast mode (skipZk=true): Syntax validation in ~1-2 seconds
• Full mode (fullCompile=true): Complete ZK circuit generation in ~10-30 seconds
• Automatic fallback: Falls back to static analysis if the compiler service is unavailable

This catches semantic errors that static analysis misses (sealed fields, disclose rules, type mismatches).

MCP Capabilities

| Capability | Feature | | --------------- | ----------------------------------------------- | | Tools | 29 tools with listChanged notifications | | Resources | 9 embedded resources with subscription support | | Prompts | 5 workflow prompts | | Logging | Client-controllable log level | | Completions | Autocomplete for prompt arguments | | Progress | Real-time progress for compound tools | | Sampling | AI-powered generation (when client supports it) |

9 Embedded Resources

Quick references available offline:

• Compact syntax guide (v0.16-0.21)
• SDK API reference
• OpenZeppelin contracts
• Tokenomics overview
• Wallet integration
• Common errors & solutions

Static Analysis

extract-contract-structure catches common mistakes before compilation:

| Check | Severity | Description | | ------------------------- | -------- | ------------------------------------------------------- | | deprecated_ledger_block | P0 | Catches ledger { } → use export ledger field: Type; | | invalid_void_type | P0 | Catches Void → use [] (empty tuple) | | invalid_pragma_format | P0 | Catches old pragma → use `>= 0.16 && HTTP port (default: 3000) --json Output in JSON (default: YAML for better LLM efficiency) --github-token GitHub token (overrides GITHUB_TOKEN env var) -h, --help Show help -v, --version Show version

> **Why YAML by default?** YAML is ~20-30% more token-efficient than JSON, which means AI assistants can process more context from tool responses.

### Local Mode

Run everything locally for privacy or offline use:

```json
{
  "mcpServers": {
    "midnight": {
      "command": "npx",
      "args": ["-y", "midnight-mcp@latest"],
      "env": {
        "MIDNIGHT_LOCAL": "true",
        "OPENAI_API_KEY": "sk-...",
        "CHROMA_URL": "http://localhost:8000"
      }
    }
  }
}

Requires ChromaDB (docker run -d -p 8000:8000 chromadb/chroma) and OpenAI API key.

GitHub Token

Add "GITHUB_TOKEN": "ghp_..." for higher GitHub API rate limits (60 → 5000 requests/hour).

---

Developer Setup

git clone https://github.com/Olanetsoft/midnight-mcp.git && cd midnight-mcp
npm install && npm run build && npm test

# Lint & format
npm run lint          # ESLint (typescript-eslint)
npm run lint:fix      # Auto-fix lint issues
npm run format        # Prettier

The hosted API runs on Cloudflare Workers + Vectorize. See [api/README.md](./api/README.md) for backend details.

---

Links

• Midnight Docs
• MCP Spec
• Midnight GitHub

License

MIT

Stargazers ⭐️

[](https://star-history.com/#Olanetsoft/midnight-mcp&Date)

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: Olanetsoft
• Source: Olanetsoft/midnight-mcp
• License: MIT
• Homepage: https://www.npmjs.com/package/midnight-mcp

Install and usage instructions live in the source repository linked above.