How to Use the API Design Prover MCP in Claude

Q: Can I run API Design Prover locally with the Claude Desktop config file?

Yes. You add this MCP Server to your claudedesktopconfig.json file to run validation locally. Once configured, Claude calls the tool directly on your machine via stdio.

Stop Claude Desktop from writing messy, unversioned endpoints and force clean API contracts right in your local chat.

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Connect API Design Prover MCP to Claude Desktop

Create your Vinkius account to connect API Design Prover to Claude Desktop and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup API Design Prover with Claude Desktop

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Run validate_api_design locally in Claude Desktop

Running the `validate_api_design` tool inside Claude Desktop lets you audit your verbs and payloads before committing to database migrations. The tool checks your API design structure right inside the Claude Desktop app. It catches bad HTTP verb choices and missing deprecation dates in your API designs so your local Claude build doesn't inherit technical debt.

Enforce RFC 7807 error contracts in your local chat

Using the `validate_api_design` tool inside Claude Desktop stops bad error shapes before your client writes bad code. If your error contracts lack structured fields or clear error codes, the MCP tool rejects the design. Claude reads this failure and rewrites the contract locally before you spin up your server.

Hard pagination limits for your desktop client

Enforcing limits via `validate_api_design` prevents unbounded endpoints from crashing your local databases. By calling the validation tool, your local agent ensures every list endpoint specifies a clear maximum page size. You avoid memory leaks on your localhost long before the code goes to production.

Setup guide

Set up API Design Prover MCP in Claude Web or Desktop

1

Open Claude Settings

Go to claude.ai, click your profile icon, then navigate to Customize → Connectors.
2

Add Custom Connector

Click the "+" button and select Add custom connector. Paste your Vinkius endpoint URL: https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. For OAuth-protected servers, expand Advanced settings to add credentials.
3

Start a conversation

Open a new chat. The API Design Prover MCP tools are available immediately — no restart needed.

Endpoint URL

https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp

No configuration file needed — paste the URL directly in the Claude web interface.

Available on Free (1 connector), Pro, Max, Team, and Enterprise plans.

Prerequisites

Claude Desktop installed (macOS or Windows)
Active Vinkius subscription with a valid endpoint token

1

Open Claude Desktop Settings

Click the menu icon at the top-left corner, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json in your default text editor.
2

Paste the API Design Prover MCP configuration

Copy the JSON snippet on the right into the mcpServers object. Replace [YOUR_TOKEN_HERE] with your endpoint token from cloud.vinkius.com.
3

Restart Claude Desktop

Close and reopen the application. Claude needs a full restart to load new MCPs — refreshing a conversation is not enough.
4

Verify the connection

Open a new conversation. Click the 🔌 icon at the bottom of the message input. You should see tools listed under api-design-prover-mcp.

json

{
  "mcpServers": {
    "api-design-prover-mcp": {
      "url": "https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    }
  }
}

Get your connection token →

Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by API Design Prover. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.

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Common questions about API Design Prover MCP in Claude Desktop

The tool intercepts your design ideas inside Claude Desktop and runs them through the validation checks. If you forgot to specify response envelopes or HTTP verbs, the validation fails, forcing Claude to rewrite the schema before generating code.

Yes. You add this MCP Server to your `claude_desktop_config.json` file to run validation locally. Once configured, Claude calls the tool directly on your machine via stdio.

It enforces RFC 7807 or equivalent structured error contracts. When Claude Desktop runs the validation tool, any custom format that lacks structured fields will trigger a validation failure.

The tool returns a detailed failure payload to your desktop agent. Claude reads the exact design violation, like a missing deprecation policy, and corrects the schema in your active chat.

No. All validation of your API design schemas happens locally inside your secure MCP sandbox. Your raw endpoint structures and versioning policies never leave your local machine.

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