Postman
API platform for designing, testing, documenting, and governing APIs at scale.
About
Postman is the world's leading API platform, used by a reported 40 million developers and 500,000 organizations. It covers the full API lifecycle: designing specs, sending requests, automated testing, mock servers, documentation, monitors, and team workspaces. Its 2026 pivot made AI native to the platform rather than bolted on: Agent Mode understands APIs and executes changes inside governance controls, and the AI Engineer (announced June 2026) acts as an always-on agent that builds, tests, documents, and governs APIs using Postman's context graph.
Postman also shipped Passport, a secretless credential system that gives AI agents ephemeral, task-scoped identities instead of long-lived API keys. In March 2026 the free plan was restricted to a single user, which pushed many solo developers and small teams toward open alternatives like Bruno and Hoppscotch. Postman remains privately held with backing from Battery, BOND, Coatue, CRV, and Insight.
What it can do
- Request builder with collections and environments
- Automated API testing and CI/CD integration
- AI-native Agent Mode and AI Engineer
- API Catalog as a system of record
- Passport secretless auth for agents
Setup
Download the desktop app or use the web client; import a collection or OpenAPI spec to start.
Prerequisites
APIs to build or consume; a free account for cloud sync.
Use cases
Works with
Trust score — 9/10
Scored 9/10 (verified tier, metrics-v1). Evidence: Verified via vendor site/docs/GitHub and reputable coverage, wave 88; Trending score 88/100 from researcher assessment.
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.