Generate MCP Servers from OpenAPI & Swagger
Connect Claude Desktop in minutes.
Stop rebuilding MCP servers from scratch - generate them instead.Works with any OpenAPI v2/v3 or Swagger spec (YAML or JSON). Claude Desktop verified.
100% free public beta. No credit card required.
Live flow
From API spec to Claude-ready MCP tools
legacyai generate ./openapi.yaml --target claude-desktop
Key features
- OpenAPI & Swagger -> MCP server with typed tools
- Auth-ready, read-only safe defaults, and Zod validation
- Claude Desktop integration in under 5 minutes
- Works with ASP.NET, FastAPI, Express, Laravel, Spring Boot, Go, Django
OpenAPI 3.1 | ASP.NET Core | Bearer JWT | 2.3s
Trusted API keywords and compatibility signals
Using a different stack? See full integrations and quickstarts
OpenAPI to MCP in Minutes
MCP (Model Context Protocol) is an open protocol that allows AI agents and LLMs like Claude to securely connect with your APIs, databases, files, and external systems.
LegacyAI automates the hardest part - generating the MCP server from your existing OpenAPI specification, so your team ships AI-ready tools in minutes instead of months.
Connects AI to real systems
MCP standardizes how models discover, authorize, and call tools across APIs, databases, and files.
Safe by default
Scope, auth, and read-only controls keep AI agents inside the guardrails your team defines.
Generated from OpenAPI
LegacyAI turns existing specs into MCP servers so teams ship AI-ready tools fast.
Convert Swagger APIs into AI Agent Tools
MCP integrations take months
Hand-rolling Model Context Protocol servers means weeks of TypeScript, tool schemas, and error handling. Teams stall before shipping.
Swagger specs drift fast
Every OpenAPI change breaks your AI tools. Version drift creates silent failures and brittle Claude Desktop workflows.
Security and control gaps
Without guardrails like read-only mode and scoped auth, AI agents can overreach. Enterprises need control by default.
Claude Desktop Ready MCP Servers
Upload OpenAPI or Swagger
Drop swagger.json or OpenAPI 3.x (JSON or YAML). LegacyAI parses every endpoint, schema, and auth flow.
swagger.json
Generate MCP Server
We generate a production-ready MCP server with TypeScript + Zod validation, retries, and safe defaults.
Connect Claude Desktop
Run one command to install and register the MCP server. Start calling your API from Claude in minutes.
Compatibility
Works with any OpenAPI 2.0 or 3.x compliant backend. Most modern frameworks include this automatically.
Not sure if your backend qualifies? Check integration guide
Frameworks Supported
Tools per API (avg)
MCP Setup Time
OpenAPI Compatible
Build Production-Ready MCP Servers
OpenAPI → MCP in minutes
Generate a Model Context Protocol server from Swagger/OpenAPI specs without writing glue code.
Type-safe by default
TypeScript + Zod validation ensures every tool call is validated before it touches your API.
Dynamic spec sync
Keep MCP tools aligned with your latest OpenAPI changes with fast re-generation and sync.
OpenAPI 2.0 → 3.1
Swagger and OpenAPI in JSON or YAML. Compatible with legacy and modern specs.
Claude Desktop ready
Install and register with one command. Your MCP server appears in Claude Desktop instantly.
Auth + read-only mode
Detect API keys, bearer tokens, and OAuth. Lock tools to read-only for safe AI access.
Production-grade reliability
Timeouts, retries, and structured errors are included for enterprise AI workloads.
Multi-backend support
Works with ASP.NET, FastAPI, Express, Laravel, Spring Boot, Go, Django, and more.
Learn MCP fast.
Docs, guides, comparisons, and developer-first onboarding.
Quickstart: Build your first MCP server
Step-by-step guide to convert an OpenAPI spec into Claude Desktop tools in minutes.
Open Quickstart →Claude Desktop integration
How to register MCP servers, configure auth, and ship reliable AI agent tools.
View Setup Guide →OpenAPI → MCP best practices
Production patterns for schema design, read-only tools, and safe agent workflows.
Read the Guide →Compare LegacyAI vs DIY MCP
See how LegacyAI stacks up against hand-built MCP servers and manual integrations.
See Comparisons →Generate Typed MCP Tools from Existing APIs
Enterprise & Legacy Systems
Expose SAP, Oracle, or proprietary APIs to Claude MCP tools without replacing existing software.
SaaS Platforms
Make your product Claude-native with OpenAPI-to-MCP generation for AI-ready features.
Platform Teams & Internal Tools
Turn internal APIs into AI agent tools for deployments, monitoring, and analytics.
Healthcare & Finance
Secure, read-only MCP tools with auth controls and audit-friendly patterns.
Agencies & Consultants
Ship Claude Desktop integrations for every client in minutes, not weeks.
API-First Startups
Launch AI features faster while competitors hand-build MCP server code.
Frequently asked questions about MCP, integrations, and security.
How do I integrate with Claude Desktop?+
Generate MCP servers from your OpenAPI/Swagger spec and register the resulting tool bundle in Claude Desktop. See the Claude Desktop quickstart in the docs for step-by-step instructions.
Where are the developer docs?+
Full developer docs are available on the Docs page. They include quickstarts for FastAPI, ASP.NET, and Node.js plus examples for CI/CD and dynamic sync.
What's the difference between projects and servers?+
A project is one API you are connecting to LegacyAI. Free supports 1 active project, Pro supports 5 concurrent projects, and Business supports unlimited projects. This is measured per month, and the limits define how many projects can be active at once over time.
Can I cancel anytime?+
Yes. No contracts required. You can cancel anytime from your account settings. If you cancel mid-month, you keep access until the end of your current billing period.
Do you offer annual discounts?+
Yes. Annual billing saves 20% on all paid plans. Toggle Annual at the top of the pricing section to see discounted yearly rates.
What happens when I outgrow my plan?+
You can upgrade anytime. New plan features activate immediately, and we prorate any charges. No downtime and no data loss.
Need something custom?+
For enterprise requirements or high-volume usage, contact our sales team at sales@nivforge.in or use the contact form below.
What is MCP?+
MCP (Model Context Protocol) is a protocol developed by Anthropic that lets Claude and other AI agents connect with external tools, APIs, and data sources. It defines how models discover and call tools. LegacyAI generates MCP servers from your OpenAPI spec so your APIs become Claude-compatible automatically.
Does my backend need to expose OpenAPI on production?+
No. LegacyAI works with file uploads, CI/CD pipeline generation, or a CLI tool. Your production server never needs to expose the specification publicly.
What happens when my API changes?+
With dynamic sync enabled, your MCP server re-fetches the latest spec on every startup. For CI/CD pipelines, a path-based trigger ensures regeneration only runs when API files actually change.
Is my API data secure with LegacyAI?+
Yes. LegacyAI never stores your API credentials. Generated MCP servers use your existing auth tokens and run on your own machine. Enterprise customers can use self-hosted deployment for complete data isolation.
Can I restrict what Claude can do with my API?+
Yes. Enable read-only mode to expose only GET endpoints. You can also toggle individual tools on or off from the dashboard, giving you full control over what Claude can access.
Which frameworks are supported?+
Any framework that exports an OpenAPI or Swagger specification. This includes ASP.NET Core, FastAPI, Express.js, Laravel, Spring Boot, Go, and Django REST Framework.
NEED SOMETHING CUSTOM?
For teams with advanced requirements like self-hosted deployment, SSO integration, or SLA guarantees.
We'll schedule a 20-minute call to understand your needs and build a custom plan.
Your APIs deserve
first-class AI tools.
Join teams shipping MCP servers and Claude Desktop integrations without custom glue code.
No credit card required · Instant access · 100% Free