NSwag website screenshot

NSwag

NSwag is an open source .NET toolchain for generating C# and TypeScript API clients and Swagger/OpenAPI specifications from ASP.NET controllers and vice versa.

NSwag publishes 1 API on the APIs.io network. Tagged areas include .NET, Code Generation, OpenAPI, SDKs, and TypeScript.

NSwag’s developer surface includes documentation and 2 more developer resources.

🌐 Visit website 📡 Source on GitHub
19.4/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
1 APIs
.NETCode GenerationOpenAPISDKsTypeScript

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 19.4/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/nswag: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

NSwag

NSwag is an open source .NET toolchain for generating C# and TypeScript API clients and Swagger/OpenAPI specifications from ASP.NET controllers and vice versa.

Pricing Plans 1

Published pricing tiers and plan structures.

Nswag Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nswag Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Nswag Finops

FINOPS

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: nswag
name: NSwag
description: NSwag is an open source .NET toolchain for generating C# and TypeScript API clients and Swagger/OpenAPI specifications
  from ASP.NET controllers and vice versa.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nswag.png
tags:
- .NET
- Code Generation
- OpenAPI
- SDKs
- TypeScript
url: https://raw.githubusercontent.com/api-evangelist/nswag/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: nswag:nswag
  name: NSwag
  description: NSwag is an open source .NET toolchain for generating C# and TypeScript API clients and Swagger/OpenAPI specifications
    from ASP.NET controllers and vice versa.
  humanURL: https://github.com/RicoSuter/NSwag
  tags:
  - .NET
  - Code Generation
  - OpenAPI
  - SDKs
  - TypeScript
  properties:
  - type: Documentation
    url: https://github.com/RicoSuter/NSwag/wiki
  - type: GettingStarted
    url: https://github.com/RicoSuter/NSwag/wiki/Getting-Started
  - type: GitHubRepository
    url: https://github.com/RicoSuter/NSwag
common:
- type: Website
  url: https://github.com/RicoSuter/NSwag
- type: Documentation
  url: https://github.com/RicoSuter/NSwag/wiki
- type: GitHubOrganization
  url: https://github.com/RicoSuter/NSwag
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com