Postman

Postman is an API platform for building, testing, documenting and managing APIs, and it now presents itself as API engineering for AI agents. A command line tool installed with npm and started with a single init command loads Postman skills into a coding agent, so the agent can run collections, tests and API workflows from the editor. Skills cover API discovery, testing, mocking, monitoring, continuous integration checks and performance testing, and a Postman plugin is available for Claude Code. It is aimed at developers and engineering teams that design and ship APIs. A Context Graph gives agents a structured, queryable map of an organization's APIs, collections and relationships, so generated calls and tests reflect how those APIs actually work. A feature called Passport lets people, services and agents call APIs without holding the secret, using a Secure Access Proxy that swaps a credential reference for the real secret inside the customer's cloud. The desktop app provides a multi protocol API client, specs, mock servers, native Git, a collection runner and performance testing. Pricing is published on four plans. Free costs $0 per month and includes 50 AI credits. Solo costs $9 per month billed annually and includes 400 AI credits per month. Team costs $19 per user per month billed annually and adds collaboration and basic role based access control. Enterprise is priced through sales. AI overages are pay as you go, starting at $0.05 per credit on the first tier.