Dredd website screenshot

Dredd

Dredd is a language-agnostic, open source HTTP API testing framework that validates API implementations against API Blueprint or OpenAPI (2.0/3.0) description documents.

Dredd publishes 1 API on the APIs.io network. Tagged areas include Contract Testing, API Testing, OpenAPI, API Blueprint, and Tooling.

Dredd’s developer surface includes documentation and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub
13.5/100 emerging ▬ flat Agent 3/100 human only self hosted · MIT Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
AccessFreemium
1 APIs
Contract TestingAPI TestingOpenAPIAPI BlueprintTooling

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 13.5/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 1.9 / 20
Access Clarity 3.2 / 20
Operational Transparency 3.4 / 13
Contract Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 3/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
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
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/dredd: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

Dredd

Dredd is a language-agnostic command-line tool for validating an API description document against a backend implementation. It supports API Blueprint, OpenAPI 2.0, and OpenAPI 3...

Pricing Plans 1

Published pricing tiers and plan structures.

Dredd Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Dredd Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Dredd Finops

FINOPS

Security Posture 1

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

Dredd Domain Security

TLSv1.3

SECURITY

Resources

Documentation 2

Reference material describing how the API behaves

ContributionGuide
ContributionGuide
 Documentation
Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: dredd
name: Dredd
description: Dredd is a language-agnostic, open source HTTP API testing framework that validates API implementations against
  API Blueprint or OpenAPI (2.0/3.0) description documents.
type: Index
deliveryModel:
  model: self-hosted
  license: MIT
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Tooling
access: Open Source
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/dredd.png
tags:
- Contract Testing
- API Testing
- OpenAPI
- API Blueprint
- Tooling
url: https://raw.githubusercontent.com/api-evangelist/dredd/refs/heads/main/apis.yml
created: '2026-03-25'
modified: '2026-04-28'
specificationVersion: '0.23'
apis:
- aid: dredd:dredd
  name: Dredd
  description: Dredd is a language-agnostic command-line tool for validating an API description document against a backend
    implementation. It supports API Blueprint, OpenAPI 2.0, and OpenAPI 3.0, and provides hooks for custom test setup and
    teardown.
  humanURL: https://dredd.org
  tags:
  - Contract Testing
  - API Testing
  - OpenAPI
  - API Blueprint
  properties:
  - type: Documentation
    url: https://dredd.org/en/latest/
  - type: GitHubRepository
    url: https://github.com/apiaryio/dredd
  - type: NPM Package
    url: https://www.npmjs.com/package/dredd
  - type: Issues
    url: https://github.com/apiaryio/dredd/issues
  - type: ReleaseNotes
    url: https://github.com/apiaryio/dredd/releases
common:
- type: ContributionGuide
  url: https://github.com/apiaryio/dredd/blob/master/CONTRIBUTING.md
- type: License
  name: MIT
  url: https://github.com/apiaryio/dredd/blob/master/LICENSE
- type: DomainSecurity
  url: security/dredd-domain-security.yml
- type: Website
  url: https://dredd.org
- type: Documentation
  url: https://dredd.org/en/latest/
- type: GitHubOrganization
  url: https://github.com/apiaryio
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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