MCP-Builder.ai

OpenAPI to MCP Server

Connect your AI Tools
with your API

Create a hosted MCP-Server from your OpenAPI 3.x or Swagger definition in seconds. Publish and build tools according to your flexible needs with our AI-Assistant.

Trusted by enterprises and SMEs

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Step 01

Import your spec

Paste a spec URL or upload an OpenAPI 3.x / Swagger 2.0 file.

Step 02

Review & Adjust

Explain your usecase or adjument in plain english or get best-practice insights by our AI-Assistant.

Step 03

Publish Server

Get a hosted MCP endpoint for Claude, ChatGPT, Copilot, Cursor and more.

5,000+
MCP-Servers built
< 5 min
Prompt to live server
99.9%
Hosted uptime

Use your API in any AI tool

One OpenAPI spec. Every AI client. Standard MCP protocol, zero lock-in.

Claude logo
Claude
ChatGPT logo
ChatGPT
Microsoft Copilot logo
Microsoft Copilot
Mistral logo
Mistral
Cursor logo
Cursor
Windsurf logo
Windsurf
Gemini logo
Gemini
Perplexity logo
Perplexity
LangChain logo
LangChain
n8n logo
n8n
Zapier logo
Zapier
+
Any MCP Client

Don´t waste time with Deployments

Stop wasting time and tokens by building local MCP-Servers when you can start a fully secure and hosted proven MCP-Server in minutes.

Faster than building it yourself

From idea to live MCP-Server in minutes, not the days a custom build would take.

Enterprise security by default

OAuth, API keys, JWT, fine-grained access control and audit logs out of the box.

Managed & Monitored

No need to install, host and monitor a server yourself. Simply start using it.

Zero ops, auto-scaling

Fully hosted infrastructure. No servers to maintain, no scaling to configure.

Secure by design

Your data stays yours

We built MCP-Builder.ai so you can give AI access to real systems without giving up control.

No data stored on server

Your data is read at request time and forwarded — never persisted on our side.

Encrypted end-to-end

All connections use TLS. Credentials are stored encrypted at rest.

OAuth, API Key, JWT

Authenticate with the method your systems already use.

Full audit logs

Every tool call is logged so you know exactly what AI accessed.

EU hosting available

Choose EU data residency for GDPR-aligned deployments.

On-prem Options

Run the entire MCP-Server inside your own infrastructure if required.

Frequently Asked Questions

Common questions about building an OpenAPI MCP server.

MCP-Builder.ai - Build hosted MCP-Servers in minutes | Product Hunt

Backed & supported by

Trusted by enterprises and SMEs

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Ready to build your MCP-Server?

Describe it once. We host it. Connect to any AI tool in minutes.