Slate website screenshot

Slate

Slate is an open-source tool for creating beautiful, three-panel API documentation from Markdown. Built on Ruby and Middleman, Slate renders a left-side navigation menu, a center documentation panel, and a right-side code sample panel. It supports multiple language tabs, full-text search, GitHub Pages deployment, and over 100 syntax-highlighted languages.

Slate publishes 1 API on the APIs.io network. Tagged areas include API Documentation, Developer Tools, Documentation, Markdown, and Ruby.

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

Slate’s developer surface includes GitHub presence, getting-started guide, documentation, changelog, code examples, and 14 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.6/100 thin ▬ flat Agent 5/100 human only Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemium
1 APIs
API DocumentationDeveloper ToolsDocumentationMarkdownRubyStatic Site GeneratorThree-Panel

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 38.6/100 · thin
Contract Quality 4.4 / 25
Developer Ergonomics 5.2 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 6.8 / 13
Governance 8.3 / 12
Discoverability 5.9 / 10
Agent readiness — 5/100 · 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 7 / 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/slate: 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.

Slate

Slate is an open-source static site generator for creating beautiful, three-panel API documentation from Markdown files. Originally created by Robert Lord in 2013 at TripIt and ...

Pricing Plans 1

Published pricing tiers and plan structures.

Slate Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Slate Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Slate Finops

FINOPS

Semantic Vocabularies 1

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

Slate Context

0 classes · 7 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Slate API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 1

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

Slate Frontmatter Configuration

9 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Slate Frontmatter Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

Slate Frontmatter Example

3 fields

EXAMPLE

Resources

Get Started 2

Portal, sign-up, and the first successful call

LiveDemo
LiveDemo
 GettingStarted
GettingStarted

Documentation 5

Reference material describing how the API behaves

Documentation
Documentation
 Documentation
Documentation
 Documentation
Documentation
 Reference
Reference
 JSONSchema
JSONSchema

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

JSONLD
JSONLD
 JSONStructure
JSONStructure
 Vocabulary
Vocabulary

Build 3

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub
 npm
npm
 Examples
Examples

Operate 2

Status, limits, changes, and where to get help

Forums
Forums
 ChangeLog
ChangeLog

Commercial 1

Pricing, plans, and the legal terms of use

License
License

Company 1

The organization behind the API

LinkedIn
LinkedIn

Other 2

Properties that don't map to a standard resource type

Docker
Docker
 Customers
Customers

Source (apis.yml)

apis.yml Raw ↑ 
aid: slate
url: https://raw.githubusercontent.com/api-evangelist/slate/refs/heads/main/apis.yml
apis:
- aid: slate:slate
  name: Slate
  tags:
  - API Documentation
  - Documentation
  - Markdown
  - Static Site Generator
  humanURL: https://github.com/slatedocs/slate
  properties:
  - url: https://github.com/slatedocs/slate
    type: GitHub
  - url: https://slatedocs.github.io/slate/
    type: LiveDemo
  - url: https://hub.docker.com/r/slatedocs/slate
    type: Docker
  - url: json-schema/slate-frontmatter-schema.json
    type: JSONSchema
  - url: json-ld/slate-context.jsonld
    type: JSONLD
  - url: json-structure/slate-frontmatter-structure.json
    type: JSONStructure
  - url: examples/slate-frontmatter-example.json
    type: Examples
  - url: vocabulary/slate-vocabulary.yml
    type: Vocabulary
  description: Slate is an open-source static site generator for creating beautiful, three-panel API documentation from Markdown
    files. Originally created by Robert Lord in 2013 at TripIt and later maintained by the slatedocs organization, Slate is
    built on Ruby and the Middleman static site framework. It renders documentation with a navigation sidebar on the left,
    API descriptions in the center panel, and code samples in the right panel.
name: Slate
tags:
- API Documentation
- Developer Tools
- Documentation
- Markdown
- Ruby
- Static Site Generator
- Three-Panel
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/slate.png
access: 3rd-Party
created: '2026-03-18'
modified: '2026-05-02'
position: Consumer
segments:
- Documentation
- Developer Tools
description: Slate is an open-source tool for creating beautiful, three-panel API documentation from Markdown. Built on Ruby
  and Middleman, Slate renders a left-side navigation menu, a center documentation panel, and a right-side code sample panel.
  It supports multiple language tabs, full-text search, GitHub Pages deployment, and over 100 syntax-highlighted languages.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.19'
common:
- type: LinkedIn
  url: https://www.linkedin.com/company/slate-magazine
- name: Slate GitHub Repository
  description: 'null'
  url: https://github.com/slatedocs/slate
  type: GitHub
- name: Slate Live Demo
  description: 'null'
  url: https://slatedocs.github.io/slate/
  type: LiveDemo
- name: Slate Docker Image
  description: 'null'
  url: https://hub.docker.com/r/slatedocs/slate
  type: Docker
- name: Slate Getting Started Wiki
  description: 'null'
  url: https://github.com/slatedocs/slate/wiki#getting-started
  type: GettingStarted
- name: Slate Using Natively
  description: 'null'
  url: https://github.com/slatedocs/slate/wiki/Using-Slate-Natively
  type: Documentation
- name: Slate Using Docker
  description: 'null'
  url: https://github.com/slatedocs/slate/wiki/Using-Slate-in-Docker
  type: Documentation
- name: Slate Using Vagrant
  description: 'null'
  url: https://github.com/slatedocs/slate/wiki/Using-Slate-in-Vagrant
  type: Documentation
- name: Slate in the Wild
  description: 'null'
  url: https://github.com/slatedocs/slate/wiki/Slate-in-the-Wild
  type: Customers
- name: Rouge Supported Languages
  description: 'null'
  url: https://github.com/rouge-ruby/rouge/wiki/List-of-supported-languages-and-lexers
  type: Reference
- name: Slate npm Package (slate-tools)
  description: 'null'
  url: https://www.npmjs.com/package/slate-tools
  type: npm
- name: Slate License (Apache 2.0)
  description: 'null'
  url: https://github.com/slatedocs/slate/blob/main/LICENSE
  type: License
- name: Slate Discussions
  description: 'null'
  url: https://github.com/slatedocs/slate/discussions
  type: Forums
- name: Slate Changelog
  description: 'null'
  url: https://github.com/slatedocs/slate/blob/main/CHANGELOG.md
  type: ChangeLog
- name: Slate Frontmatter JSON Schema
  description: JSON Schema for Slate frontmatter configuration
  url: json-schema/slate-frontmatter-schema.json
  type: JSONSchema
- name: Slate JSON-LD Context
  description: JSON-LD context for Slate documentation entities
  url: json-ld/slate-context.jsonld
  type: JSONLD
- name: Slate Frontmatter Structure
  description: JSON Structure for Slate frontmatter fields
  url: json-structure/slate-frontmatter-structure.json
  type: JSONStructure
- name: Slate Frontmatter Example
  description: Example frontmatter configuration
  url: examples/slate-frontmatter-example.json
  type: Examples
- name: Slate Vocabulary
  description: Domain vocabulary for Slate documentation concepts
  url: vocabulary/slate-vocabulary.yml
  type: Vocabulary