Postman
API client for building, testing and documenting requests
1/3Postman is an API client and the platform built around it: you compose requests, group them into collections with shared environments and variables, send them and inspect the response, with tests written against each one. The Collection Runner executes a whole collection in sequence with iterations and data files, reporting passes and failures per request, and monitors run those same collections on a schedule against a live API. Around the client sit design tools — an OpenAPI editor and visualizer, mock servers and generated documentation — plus Flows for chaining requests into multi-step workflows and SDK generation for publishing client libraries. Collections version through native Git, and Enterprise plans add an API Catalog, a private API Network, granular RBAC, governance and audit logs.
- Build and send requests, then inspect the response and headers
- Collections with shared environments, variables and tests
- Collection Runner executes a whole collection with iterations
- Monitors run collections on a schedule against a live API
- OpenAPI editor and visualizer, mock servers and generated docs
- Flows chain requests into multi-step workflows
- Native Git versioning for collections and specs
- API Catalog, private API Network and granular RBAC on Enterprise
Based on what people have said
Every answer links back to the mentions it came fromWhat are the common complaints regarding Postman's complexity and performance?
Some users find that the tool has grown into a much larger product than they personally require. Others report that while collections work for simple tasks, they become messy when handling conditional logic or passing complex objects between steps. Additionally, some users have sought alternatives because they prefer not to have their collections stored in a proprietary format behind a login on a cloud server.
3 mentions · r/QualityAssurance · r/SideProject · r/opensourcealternative · Aug 2026
How do people use Postman in their professional workflows?
Users frequently employ Postman for API testing, manual validation of requests, and providing evidence for their work. It is often cited as a standard skill requirement for job roles involving API testing and monitoring. Some developers use it to bypass browser-based CORS issues that occur during development.
8 mentions · r/AutismInWomen · r/ClaudeCode · r/techadvice · r/DeveloperJobs · r/aws · r/developersIndia · Aug 2026 – Sep 2026
Are there alternatives to Postman that users are considering?
Yes, several users are exploring or have migrated to other tools. Mentioned alternatives include Insomnia, Hoppscotch, Thunder Client, Bruno, and lightweight, native HTTP clients built in C++.
5 mentions · r/coolgithubprojects · r/Kotlin · @justbyte_ · @YashHustle_22 · @aayushchugh · Aug 2026 – Sep 2026
Is Postman still necessary if I use AI for coding and debugging?
There is debate on this topic. Some users question the continued need for Postman if AI is already writing and debugging their code, while others continue to use it for manual verification and testing.
1 mention · @ekemini58110 · Aug 2026
These summarise counts and dates only. Read the quotes themselves under what people are saying.
What people are saying about Postman
64% neutral“I have learned API testing with Postman, Rest Assured, and Selenium. I am applying for jobs but not getting any calls.”
“Postman putting controls here signals the industry is starting to treat agent tool calls as a distinct attack surface rather than just another API consumer. The identity-per-agent piece is the part I keep seeing orgs underestimate — most still treat a fleet of agents as one service account.”
“Frustrated with Postman's cloud lock-in and bloat, I built an ultra-fast, local-first alternative: BULLET”
“If the Postman collection still lists source, that collection is out of date relative to the live API — thanks for flagging it; we will look at cleaning that up.”
“A lot of “backend engineers” can’t explain their own APIs without opening Postman.”
“Your API works in Postman and fails in the browser. That CORS error isn't protecting your API the way you think.”
“But my experience is very limited other than Postman.”
“Based on the screenshot, the error doesn't appear to be related to the secret itself. This indicates that Postman is unable to resolve the hostname, meaning the request is failing before it reaches the Direct Line service. In other words, this looks more like an endpoint/URL issue than an authentication issue.”
“My main goal right now is simply to hit the Copilot Studio agent through Postman and understand the correct flow, getting the token, starting a conversation, sending a message, and receiving the response. Once that works, I can handle the integration with my external app.”
“Postman and Playwright/MCP can differ in more places than you'd think: base URL, redirect handling, whatever proxy or gateway sits in between, the method after a redirect, headers, cookies, auth token, content type, body, even source IP.”
“I would suggest using a tool like Postman to explore the API auth, requests, and responses first.”
“I’d draw this flow on paper first, then implement it in small chunks and test each part using Postman.”
“When I try it via Postman - it's like my custom model can't see the knowledge. I even tried tying that knowledge directly to the nemotron model - did not work.”
“Postman became that which it set out to defeat”
“Next headline: postman gets acquired by bending spoons for fraction of last evaluation.”
“I'm using a pre cloud version of Postman and have for years. But as it's x86 I'll be dead in the water when (if) I upgrade to a MacOS version which no longer support rosetta.”
“Moved to Bruno last year after finding out Postman needed an internet connection.”
“If you've got lots of endpoints - some of which take fairly complex inputs - and you want and easy way for those endpoints to be exercised across a number of different environments Postman or similar apps are a good solution to me.”
“Using postman is the sign of a bad development environment”
“When Kong acquired Insomnia it started to become more like Postman if I recall correctly.”
“Postman turned into hot garbage after prioritizing their cloud platform.”
“Bruno is a good alternative for Postman even the UI/UX is quiet similar.”
“Wea switched from postman to Bruno. It's met all our needs.”
“Bruno is made by people who left postman FYI.”
“Either the server doesn't consider the Postman request a continuation of the same session (different IP, user agent, token, etc.), or you simply sent the Postman request after the rate limit had expired.”