# NancyFx/Nancy

Lightweight, low-ceremony, framework for building HTTP based services on .Net and Mono

Repository: https://github.com/NancyFx/Nancy
Canonical: https://ross.abutalabs.com/products/nancy
Homepage: http://nancyfx.org
Language: C#
License: MIT
License Family: permissive
Topics: nancy, c-sharp, nancy-application, mono, web, web-application-framework, framework, dotnet, dotnet-core, mit, nancyfx
Archived: true
Last push: 2021-01-24T13:28:09+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 5914, "days_push": 2047, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7094, forks 1439 (observed 2026-08-28T04:09:55.879225+00:00)

## What it is
Nancy is a lightweight, low-ceremony web framework for building HTTP-based services on .NET Framework/Core and Mono. It provides a simple DSL for handling HTTP requests with minimal boilerplate, but the project is officially no longer maintained.

## Use cases
- build a lightweight REST API in C#
- create HTTP services on Mono
- define routes with a minimal DSL
- self-host a small web service on .NET
- prototype HTTP endpoints quickly

## When to choose
- maintaining an existing legacy Nancy application
- working on Mono or older .NET Framework projects where Nancy is already in use

## When to avoid
- starting a new .NET web project
- needing long-term support or security updates
- building modern ASP.NET Core applications

## Facets
- artifact type: framework
- maturity: abandoned
- function: web-framework, http-server, routing, middleware
- domain: web-development, backend, apis
- platform: dotnet, cross-platform, windows
- tags: nancyfx, mono, dsl, unmaintained, csharp, linux, macos

## Member repositories
- NancyFx/Nancy (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:55.879225+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 2026-08-29T17:40:09.618322+00:00, confidence not recorded.
  - readme: https://github.com/NancyFx/Nancy (fetched 2026-08-28T04:09:55.879225+00:00, sha 1bf5ebbe6051)
  - homepage: http://nancyfx.org (fetched 2026-08-29T08:35:47.660494+00:00, sha 542658ea744e)
- Data as of 2026-08-30T08:39:29.467469+00:00.