PrismCat

PrismCat 1.15.0

A self-hosted, transparent proxy and debugging console for LLM APIs.

  • By Etgpao
  • Open Source
  • Updated Sep 4, 2026
Download for Windows

About PrismCat

PrismCat is a self-hosted, transparent proxy and debugging console for LLM APIs. Change one line — your base_url — and instantly see every request and response between your app and OpenAI / Claude / Gemini / Ollama / any LLM API, including streaming (SSE).

What's new in 1.15.0

What's Changed
- feat(logging): add request path filters and ignored path audit by @oneisall8955 in https://github.com/paopaoandlingyia/PrismCat/pull/8
- fix: trim and validate upstream target URLs by @syfantasy in https://github.com/paopaoandlingyia/PrismCat/pull/10
New Contributors
- @oneisall8955 made their first contribution in https://github.com/paopaoandlingyia/PrismCat/pull/8
- @syfantasy made their first contribution in https://github.com/paopaoandlingyia/PrismCat/pull/10
Full Changelog: https://github.com/paopaoandlingyia/PrismCat/compare/v1.14.0...v1.15.0

Full release notes »

Technical details

PublisherEtgpao
Version1.15.0
Release date2026-09-04
LicenseMIT
Installer typeportable
Architecturex64
Package IDpaopaoandlingyia.PrismCat

Links & install command

Install PrismCat from the command line with Windows Package Manager (winget):

winget install --id=paopaoandlingyia.PrismCat -e

aichatbotlarge-language-modelllmproxy

Older versions

  • 1.14.0
  • 1.13.0
  • 1.12.0
  • 1.11.1
  • 1.10.0
  • 1.9.0
  • 1.8.0
  • 1.7.0
  • 1.6.0