Postman’s September 2025 Update: Smarter Variables, Seamless AI, and Enhanced Workflows

Staying ahead in API development often comes down to the tools you use. Postman’s September 2025 release delivers a suite of updates focused on clarity, security, and collaborative power, helping developers and teams work smarter, not harder.

Redesigned Variables: Security and Simplicity

Variables are now more intuitive. The previous dual-value system is replaced by a single-value model, making variables straightforward at every stage. By default, all variables are stored locally, which greatly reduces the risk of inadvertently sharing sensitive data such as API keys or tokens to the cloud. Learn more

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• Enhanced security: All variables are private unless explicitly shared.
  
  
• Sharing controls: Easily toggle sharing per variable or manage in bulk.
  
  
• Sensitive data masking: Mark variables as sensitive to mask their values and receive warnings before sharing.
  
  
• Autosave and descriptions: Variables now autosave and support detailed descriptions for improved documentation.
  
  
• Backward compatibility: Previously shared variables remain accessible with new options to unshare.

This overhaul minimizes confusion, prevents data leaks, and streamlines collaboration across both individual and team workflows.

AI Requests in Collections: Unifying API and AI Development

AI development gets a major boost. Developers can now integrate, test, and evaluate AI models, such as those from OpenAI, Anthropic, and Google, right inside their API collections. This means no more switching between tools. AI requests live alongside your API projects, making organization and collaboration easier than ever.

• Integrated AI workflows: Build and test AI models within your regular Postman workspace.
  
  
• Context-aware AI: Use MCP servers to give AI models access to trusted data and internal APIs.
  
  
• MCP catalog system: Manage servers in public, internal, or private namespaces for flexible sharing.
  
  
• Unified experimentation: Teams can now iterate on AI projects as smoothly as any API integration.

This integration bridges the gap between API and AI work, enabling faster innovation and more cohesive teamwork.

Workflow Enhancements: Notebooks, VS Code, and GitHub

Postman introduces a host of smaller, yet meaningful, workflow improvements:

• Notebooks: Logging is now more robust, request refreshing is streamlined, and a community leaderboard showcases top notebooks.
  
  
• VS Code integration: The VS Code extension allows direct access to collections and environments, bringing AI assistants into your development flow without leaving your editor.
  
  
• GitHub MCP server: Now open source, the Postman MCP server offers both minimal and full-featured toolsets, supporting connection with various AI workflows through modern protocols.

These upgrades reduce context switching, speed up development, and enable you to extend Postman’s power into your preferred environment.

Building the Future of API and AI Collaboration

This month’s updates underscore Postman’s commitment to clarity, security, and seamless integration. Whether you’re handling sensitive data, experimenting with AI, or coding in your editor of choice, Postman’s continuous improvements are designed with your workflow in mind.

Get involved in the Postman community to share feedback and help drive the next wave of API and AI innovation.

Source: Postman Blog