Agent: Postman
The Postman Agent solves this by running locally and routing your web app’s requests through your actual network interface.
: This uses the browser's native fetch capabilities. It is heavily restricted by CORS and is generally only used for quick, public API tests where you don't want to install anything.
Once connected, the agent status will show as “Online” in the web app. postman agent
A Postman Agent, also known as a Postman Interceptor or Postman Desktop Agent, is a software application developed by Postman, a popular API development environment. The agent acts as an intermediary between the Postman client and the API being tested, allowing for more efficient and flexible API testing.
The term "Postman Agent" has recently evolved to include , a suite of AI-powered features designed to automate the API lifecycle. This marks a shift from simple request proxying to "Agentic AI" workflows. 1. Postman AI (Postman Astro) The Postman Agent solves this by running locally
In this guide, we will explore the different types of Postman Agents, how they solve the dreaded CORS issue, and how the new "Agent Mode" is transforming API development with Generative AI. What is the Postman Agent?
: Ensure you don't have multiple versions of the agent (or the full Desktop App) competing for the same ports. Summary Table: Which Agent Should You Use? Cloud Agent Desktop Agent Browser Agent Best For Public APIs Local & Private APIs Quick public tests Install Required Bypasses CORS N/A (Server-side) Yes Access Localhost Yes AI Features Full Support Once connected, the agent status will show as
| Feature | Without Agent (Web only) | With Agent | |--------|--------------------------|-------------| | localhost / 127.0.0.1 | ❌ Blocked | ✅ Works | | Internal DNS (e.g., mycorp.api ) | ❌ Unresolvable | ✅ Resolved | | System proxy settings | ❌ Ignored | ✅ Respected | | Client certificates (PKCS#12, PEM) | ❌ Not supported | ✅ Supported | | NTLM / Kerberos auth | ❌ Limited | ✅ Full support | | File uploads from local disk | ❌ Blocked | ✅ Allowed |