macOS
Homebrewverified · 100%
brew install kcgilocal Homebrew formula metadata
brew
Install kcgi with Homebrew, apk, Nix
Minimal CGI and FastCGI library for C/C++. Version 1.0.1 via Homebrew; verified from local package data. Also installable with nix: nix profile install nixpkgs#kcgi.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add kcgiAlpine Linux edge package indexes · kcgi · source: dl-cdn.alpinelinux.org
Nixverified · 92%
nix profile install nixpkgs#kcginixpkgs package indexes · pkgs/by-name/kc/kcgi/package.nix · source: api.github.com
overview
Package summary
Minimal CGI and FastCGI library for C/C++
Project links
Commands and aliases
- kfcgi
history
Project history and usage
kcgi is Kristaps Dzonsons's minimal CGI and FastCGI library for C and C++ web applications. Its canonical site emphasizes security, auditability, and use in the BCHS stack.
Project history
The public GitHub repository was created in January 2016, while the project site serves as the canonical release and documentation surface. kcgi grew around a conservative C web-programming model: parse CGI/FastCGI requests, validate inputs, produce HTTP output, and keep the untrusted request path small enough to audit.
The release archive shows a long 0.x series before 1.0.0 on November 10, 2025. Notable evolution includes bearer-token validation in 2021, seccomp maintenance changes in 2021, asynchronous FastCGI descriptor support in 2023, CORS header support in 2024, and fetch metadata/Priority header support in the 1.0.0 release.
Adoption history
The official installation page names system packages for OpenBSD, FreeBSD, Homebrew, Arch Linux, and other systems. The batch input also records Alpine, Homebrew, and Nix packages, reflecting its niche but durable role in BSD-flavored C web stacks.
How it is used
kcgi is used as a C/C++ library rather than primarily as a standalone command. The documentation centers on CGI and FastCGI request parsing, HTTP headers and bodies, typed input validation, formatted writers for JSON/XML/HTML output, compression, authentication helpers, and sandboxing or process separation for untrusted input.
Why package nerds care
kcgi is interesting to package nerds because it preserves a small-C, manpage-first, BSD-style approach to web development while still being packaged for modern Unix systems. Its release archive is unusually explicit about ABI, platform, and security tradeoffs.
Timeline
- 2016-01-20: GitHub repository created.
- 2021-05-08: 0.12.5 added bearer-token authorization support.
- 2021-09-23: 0.13.0 changed Linux seccomp defaults.
- 2023-11-19: 0.13.1 added asynchronous FastCGI descriptor support.
- 2025-11-10: 1.0.0 release published.
- 2025-11-17: 1.0.1 hot-fix release published.
Related projects
- The project site groups kcgi with the BCHS-oriented BSD.lv tools sqlbox and openradtool, and its README notes development primarily on OpenBSD.
Sources
security posture
Risk level: green
library-like package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- library-like package without higher-risk signals
Signals
- metadata:library-like
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 6 platform targets.
- Build metadata lists 1 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
kfcgi | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-25
manager version1.0.1
manager updated
local dataok
upstreamnot checked
latest detectednot detected
- infoNo package-manager update timestamp was available.low confidence
- infoRelease/tag comparison is only available for GitHub repositories.https://kristaps.bsd.lv/kcgi/none confidence
install metadata
Package metadata
| Package key | brew:kcgi |
|---|---|
| Version | 1.0.1 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/kcgi |
| Homepage | https://kristaps.bsd.lv/kcgi/ |
| Repository | https://github.com/kristapsdz/kcgi |
| Upstream docs | https://kristaps.bsd.lv/kcgi |
| License | ISC |
| Source archive | https://kristaps.bsd.lv/kcgi/snapshots/kcgi-1.0.1.tgz |
| Build dependencies | bmake |
| Bottle | available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | kcgi |
| Version Scheme | 0 |
| Revision | 0 |
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Nix95%
kcgi
nix profile install nixpkgs#kcgi- normalized package name match
- Matched by: Kcgi
apk95%
kcgi 1.0.1-r0
CGI and FastCGI library for C/C++ web applications
sudo apk add kcgi- License: ISC
- Architecture: x86_64
- Source Package: kcgi
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Kcgi
apk95%
kcgi-dev 1.0.1-r0
CGI and FastCGI library for C/C++ web applications (development files)
sudo apk add kcgi-dev- License: ISC
- Architecture: x86_64
- Source Package: kcgi
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Kcgi
apk95%
kcgi-doc 1.0.1-r0
CGI and FastCGI library for C/C++ web applications (documentation)
sudo apk add kcgi-doc- License: ISC
- Architecture: x86_64
- Source Package: kcgi
- normalized package name match
- Matched by: Kcgi
apk95%
kcgi-static 1.0.1-r0
CGI and FastCGI library for C/C++ web applications (static library)
sudo apk add kcgi-static- License: ISC
- Architecture: x86_64
- Source Package: kcgi
- normalized package name match
- Matched by: Kcgi
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment