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jhlee0409

OpenAPI Sync MCP

by jhlee0409
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OpenAPI Sync MCP

CI MCP License: MIT MCP Badge

A high-performance MCP server for OpenAPI specifications. Parse, diff, track dependencies, and generate code - all from your AI assistant.

Built with Rust for speed and minimal resource usage.

Features

  • Dependency Graph - Know which endpoints break when you change a schema

  • Smart Diff - Detect breaking changes before they hit production

  • Paginated Parsing - Handle massive specs without overwhelming context

  • 24h Cache - Fast repeated queries with HTTP cache support

  • Multi-target Codegen - TypeScript, Rust, Python from one spec

Related MCP server: OpenAPI Schema Explorer

Quick Start

npm install -g @jhlee0409/openapi-sync-mcp

Add to ~/.claude/settings.json:

{
  "mcpServers": {
    "oas": {
      "command": "openapi-sync-mcp"
    }
  }
}

Tools

Tool

Description

oas_parse

Parse and validate OpenAPI spec (with pagination)

oas_deps

Find affected endpoints when a schema changes

oas_diff

Compare two spec versions, detect breaking changes

oas_status

Check cache status

oas_generate

Generate TypeScript/Rust/Python code

Code Generation Targets

typescript-types · typescript-fetch · typescript-axios · typescript-react-query · rust-serde · rust-reqwest · python-pydantic · python-httpx

Installation

# npm (recommended)
npm install -g @jhlee0409/openapi-sync-mcp

# Cargo
cargo install openapi-sync-mcp

# Or download from GitHub Releases

Troubleshooting

Server not responding?

chmod +x openapi-sync-mcp
echo '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{}}' | openapi-sync-mcp

Cache issues? Delete .openapi-sync.cache.json or use use_cache: false.

Development

cargo test          # Run tests
cargo fmt --check   # Check formatting
cargo clippy        # Lint

License

MIT

Related

This server cannot be installed

A
license - permissive license
-
quality - not tested
C
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
5dRelease cycle
3Releases (12mo)
Commit activity

Resources

Unclaimed servers have limited discoverability.

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