How can you set the HTTP protocol version in Postman?

Question

I need to specify HTTP 1.0 in a POST request via Postman. It defaults to HTTP 1.1. Does anyone know how to specify the version of the HTTP protocol, or am I out of luck?

Answer 1

Unfortunately, it's still not supported by Postman as of April 2019. Previous version of Postman used to be a browser extension and it wasn't possible to fine tune the request. Newer versions, however, run as standalone applications which could allow more low-level control of the request.

See the following comment quoted from the issue #6242 which was opened early April 2019 requesting an option to specify HTTP protocol version:

You'll be pleased to know that work is in progress for more low-level control over the request. Stay tuned.

As of January 2022, however, Postman haven't shared any updates on this.

---

Depending on what you need, you could use curl. It provides a set of options that allows you to control the version of the HTTP protocol:

• --http0.9: Tells curl to be fine with HTTP version 0.9 response.
• -0, --http1.0: Tells curl to use HTTP version 1.0.
• --http1.1: Tells curl to use HTTP version 1.1.
• --http2-prior-knowledge: Tells curl to issue its non-TLS HTTP requests using HTTP/2 without HTTP/1.1 Upgrade. It requires prior knowledge that the server supports HTTP/2 straight away.
• --http2: Tells curl to use HTTP version 2.