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August 2025 Release Notes

This month, we’re introducing our Postman integration for instant SDK generation, and resolving Nullable JSON issues in Go, making it easier and more reliable to generate SDKs. We're also introducing conversational AI capabilities through our new MCP Generator that supports MCP servers with custom hostnames. These features simplify making your APIs available to AI applications.

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New Releases this Month​

  • SDK Generations from Postman collections - The Postman integration instantly transforms Collections into developer friendly SDKs, accelerating API adoption.
  • Nullable JSON in Go for SDKs - Fixed Go SDK nullable field unmarshalling to properly distinguish between null and undefined values.
  • MCP Generator Launch - The new MCP Generator automatically converts API specifications into servers that enable natural language interaction with APIs through AI.
  • MCP Custom domain name - Custom hostname feature allows users to deploy MCP servers on their own domains with secure verification.

SDK generation from Postman collections​

Developers can create developer-friendly SDKs directly from their Postman collections without writing a single line of code by using the new liblab-Postman integration. In just a few clicks, teams can streamline development processes, reducing time-to-market, expanding API reach, and freeing engineering resources from manual SDK development and maintenance.

Key Features​

  • Instant SDK Generation: Transform Postman Collections into professional-quality SDKs in minutes.
  • Multi-Language Support: Generate language-idiomatic SDKs that lower barriers to entry for developers across different programming languages.
  • Seamless Postman Integration: Works directly within Postman's interface, leveraging existing Collections and Workspaces organization.
  • Single Source of Truth: Uses existing Postman Collections as the foundation, ensuring consistency between APIs and client libraries.
  • Direct Export & Distribution: Generate SDKs within Postman and instantly export them for immediate developer access and implementation.

Sign-up for our private beta.

Nullable JSON in Go for SDKs​

We’ve resolved a Go SDK generation issue where nullable required fields were incorrectly set to undefined instead of null, causing validation errors. The new solution uses reflection and boolean flags to properly handle null JSON values.

Key Features​

  • Null vs Undefined Distinction: Properly differentiates between JSON null values and undefined fields in Go structs.
  • Validation Error Prevention: Eliminates validation failures that occurred when nullable required fields were incorrectly treated as undefined.
  • Field Type Safety: Maintains Go's type safety while correctly handling the JSON null semantics for nullable fields.

MCP Generator​

Developers can automatically convert API specifications into MCP servers, enabling users to interact with APIs through conversational AI interfaces using natural language. Customers, and internal teams can simply "speak" to your APIs instead of using technical commands.

Key features​

  • Automatic MCP Server Generation: Converts OpenAPI, Swagger, or Postman specifications into complete MCP servers.
  • Natural Language API Access: Enables users to interact with APIs through conversational AI using everyday language.
  • Multi-Platform AI Support: Works with popular AI chat clients like Claude, Cursor, and OpenAI.
  • Easy Deployment: Generates downloadable zip files for local deployment or remote server hosting.

You can read our launch announcement for more information or you can start using it in the liblab dashboard right away.

MCP Custom hostnames​

Developers can create custom hostnames for MCP servers through the MCP dashboard. They can configure their own domain using CNAME and TXT record verification for secure connections with hosting provider fallback.

Key features​

  • Custom Domain Support: Deploy MCP servers using your own branded hostname instead of default URLs.
  • DNS Verification Security: Requires CNAME and TXT record setup to ensure secure domain ownership verification.
  • Hosting Provider Fallbacks: Automatically utilizes pre-configured fallback systems from the hosting provider for reliability.

Explore the new feature in the updated liblab dashboard or read all the details in our documentation.

How to go from API spec to host MCP server in 5 steps​

Developers can generate and host a fully functional MCP server directly from their OpenAPI spec or Postman collection. This cloud-hosted service provides a public MCP endpoint that’s ready to integrate with AI tools

  1. Go to the MCP tab in the liblab dashboard.
  2. Click the MCP Build button to start the process.
  3. Upload your OpenAPI spec file.
  4. Select the authentication method.
  5. Enter the authentication details.

Once the generation process is complete, the dashboard will display your MCP server URL.

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