SpecFlow website screenshot

SpecFlow

SpecFlow was an open-source BDD (Behavior-Driven Development) testing framework for .NET that allowed teams to write executable specifications in natural language using the Gherkin syntax. Originally developed by TechTalk, it was acquired by Tricentis in 2020 and reached end-of-life on December 31, 2024. The community continuation is Reqnroll, a fork maintaining full backward compatibility.

SpecFlow publishes 2 APIs on the APIs.io network. Tagged areas include .NET, BDD, Cucumber, Gherkin, and Testing.

The SpecFlow catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

SpecFlow’s developer surface includes documentation, engineering blog, and 5 more developer resources.

30.3/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
2 APIs 14 Features
.NETBDDCucumberGherkinTesting

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 30.3/100 · thin
Contract Quality 3.2 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 7.0 / 12
Discoverability 5.9 / 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/specflow: 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 2

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

SpecFlow

SpecFlow is a BDD framework for .NET that bridges the communication gap between domain experts and developers by enabling natural language specifications (Gherkin) to be execute...

Reqnroll

Reqnroll is the open-source community continuation and fork of SpecFlow, maintaining full backward compatibility while supporting .NET 8.0 and .NET 9.0. Created in 2024 after Tr...

Pricing Plans 1

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Specflow Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Features 14

Notable capabilities this provider offers.

Gherkin Syntax

BDD Scenarios

.NET Integration

NUnit Support

xUnit Support

MSTest Support

Visual Studio Integration

Step Definitions

Scenario Outlines

Data Tables

Hooks

Context Injection

Parallel Execution

Living Documentation

Scroll for all 14

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Specflow Context

4 classes · 14 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

SpecFlow API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

SpecFlow Feature

6 properties

JSON SCHEMA

SpecFlow Scenario

7 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Specflow Feature Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Specflow Feature Example

5 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Specflow Domain Security

TLSv1.3

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 1

Authentication, authorization, and security posture

Company 2

The organization behind the API

Other 2

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: specflow
url: https://raw.githubusercontent.com/api-evangelist/specflow/refs/heads/main/apis.yml
name: SpecFlow
description: SpecFlow was an open-source BDD (Behavior-Driven Development) testing framework for .NET that allowed teams to
  write executable specifications in natural language using the Gherkin syntax. Originally developed by TechTalk, it was acquired
  by Tricentis in 2020 and reached end-of-life on December 31, 2024. The community continuation is Reqnroll, a fork maintaining
  full backward compatibility.
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/specflow.png
access: 3rd-Party
tags:
- .NET
- BDD
- Cucumber
- Gherkin
- Testing
created: '2024-01-01'
modified: '2026-05-02'
position: Consumer
segments:
- Testing
- .NET
apis:
- aid: specflow:specflow
  name: SpecFlow
  tags:
  - .NET
  - BDD
  - Cucumber
  - Gherkin
  - Testing
  humanURL: https://github.com/SpecFlowOSS/SpecFlow
  properties:
  - url: https://github.com/SpecFlowOSS/SpecFlow
    type: GitHubRepo
  - url: https://docs.specflow.org
    type: Documentation
  - url: https://www.nuget.org/packages/SpecFlow/
    type: NuGet
  - url: https://reqnroll.net/
    type: Successor
  description: SpecFlow is a BDD framework for .NET that bridges the communication gap between domain experts and developers
    by enabling natural language specifications (Gherkin) to be executed as automated tests. It supports NUnit, xUnit, and
    MSTest as underlying test runners. Reached end-of-life December 31, 2024; succeeded by the community-driven Reqnroll project.
- aid: specflow:reqnroll
  name: Reqnroll
  tags:
  - .NET
  - BDD
  - Cucumber
  - Gherkin
  - Open Source
  - Testing
  humanURL: https://reqnroll.net/
  properties:
  - url: https://reqnroll.net/
    type: Website
  - url: https://reqnroll.net/documentation/
    type: Documentation
  - url: https://github.com/reqnroll/Reqnroll
    type: GitHubRepo
  - url: https://www.nuget.org/packages/Reqnroll/
    type: NuGet
  description: Reqnroll is the open-source community continuation and fork of SpecFlow, maintaining full backward compatibility
    while supporting .NET 8.0 and .NET 9.0. Created in 2024 after Tricentis announced SpecFlow end-of-life, Reqnroll has over
    5,000 active projects and a growing contributor base.
common:
- type: DomainSecurity
  url: security/specflow-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/specflow
- url: https://github.com/SpecFlowOSS/SpecFlow
  name: SpecFlow GitHub Repository
  type: GitHubRepo
  description: 'null'
- url: https://docs.specflow.org
  name: SpecFlow Documentation
  type: Documentation
  description: 'null'
- url: https://www.nuget.org/packages/SpecFlow/
  name: SpecFlow on NuGet
  type: NuGet
  description: 'null'
- url: https://reqnroll.net/
  name: Reqnroll - SpecFlow Successor
  type: Successor
  description: 'null'
- url: https://reqnroll.net/news/2025/01/specflow-end-of-life-has-been-announced/
  name: SpecFlow End-of-Life Announcement
  type: Blog
  description: 'null'
- name: Features
  type: Features
  data:
  - name: Gherkin Syntax
  - name: BDD Scenarios
  - name: .NET Integration
  - name: NUnit Support
  - name: xUnit Support
  - name: MSTest Support
  - name: Visual Studio Integration
  - name: Step Definitions
  - name: Scenario Outlines
  - name: Data Tables
  - name: Hooks
  - name: Context Injection
  - name: Parallel Execution
  - name: Living Documentation
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.19'