# CrowCpp/Crow

A Fast and Easy to use microframework for the web.

Repository: https://github.com/CrowCpp/Crow
Canonical: https://ross.abutalabs.com/products/crowcpp-crow
Homepage: https://crowcpp.org
Language: C++
License: NOASSERTION
License Family: other
Topics: crow, cpp, webserver, framework, header-only, http, websocket, http-server
Last push: 2026-08-24T15:07:09+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 66, longevity 100
- inputs: {"age_days": 2945, "days_push": 9, "days_rel": 65, "gap_med": 106.0, "n_releases_24m": 5}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4956, forks 554 (observed 2026-08-28T04:09:03.826339+00:00)

## What it is
Crow is a fast, header-only C++ microframework for building HTTP and WebSocket web services, with Flask-style routing and type-safe handlers. It includes built-in JSON support, Mustache templating, and middleware support.

## Use cases
- build a REST API in C++
- create a websocket server
- serve JSON endpoints with a lightweight C++ framework
- write a small web service without heavy dependencies
- add HTTP routing to a C++ application
- render HTML pages with mustache templates in C++

## When to choose
- you want a Flask-like API in modern C++
- you need a fast, header-only HTTP server with no build step
- you need HTTP/1.1 and WebSocket support in one lightweight library

## When to avoid
- you need HTTP/2 or mature async support
- you need a full-featured framework with ORM, auth, and sessions built in
- you are not working in C++11/14 or newer

## Facets
- artifact type: framework
- maturity: active
- function: web-framework, http-server, websocket, routing, templating, middleware, serialization
- domain: web-development, backend, apis
- platform: cpp, cross-platform, windows
- tags: header-only, flask-like, microframework, json-support, http-server, modern-cpp, linux, macos

## Member repositories
- CrowCpp/Crow (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:03.826339+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:17:49.839847+00:00, confidence not recorded.
  - readme: https://github.com/CrowCpp/Crow (fetched 2026-08-28T04:09:03.826339+00:00, sha a58ac19259e6)
  - homepage: https://crowcpp.org (fetched 2026-08-29T08:59:11.047065+00:00, sha 240a6b1e7202)
- Data as of 2026-08-30T08:39:29.467469+00:00.