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 is listed with 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 18 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

23.4/100 emerging ▬ flat Agent 2/100 human only Heartbeat 12/100 dormant Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

1 API

API Documentation Developer Tools Documentation Markdown Ruby Static Site GeneratorThree-Panel

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 23.4/100 · emerging

Contract Quality 4.3 / 21

Developer Ergonomics 5.7 / 17

Access Clarity 1.1 / 17

Operational Transparency 2.9 / 11

Contract Governance 2.4 / 10

Discoverability 4.9 / 9

Regulatory Posture 0.7 / 15

Agent readiness — 2/100 · 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 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

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 20.4 — up to +19.9 composite points Ask about this →
Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 33.3 — up to +13.3 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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 the provider profile at artifacts.apis.io/slate/apis.yml: open an issue on github.com/api-evangelist/slate to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Higher Education and Research	undeclared	-	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Markdown

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

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 ...

Slate API pricing

Not yet checked against Slate's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Slate's documentation. All 5 limits →

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. Counts are the severity each rule declares, not results of running them.

Slate — jsonschema rules

5 rules · 4 warn-severity 1 info-severity

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

Reference

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 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Forums

Forums

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

License

License

Company 2

The organization behind the API

Website

Website

LinkedIn

Other 2

Properties that don't map to a standard resource type

Docker

Docker

Customers

Customers

Source (apis.yml)

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
deliveryModel:
  model: unknown
  license: Slate License (Apache 2.0)
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - license
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: low
  source:
  - plans
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/slate.png
access: 3rd-Party
created: '2026-03-18'
modified: '2026-09-16'
position: Consuming
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: '0.23'
common:
- type: Plans
  url: plans/slate-plans-pricing.yml
- type: RateLimits
  url: rate-limits/slate-rate-limits.yml
- type: FinOps
  url: finops/slate-finops.yml
- type: Website
  url: https://slatedocs.github.io
- 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

Slate API — frequently asked questions

Does Slate have an API?

Yes. APIs.io lists 1 API from Slate, including Slate.

How much does the Slate API cost?

APIs.io lists 3 pricing plans for Slate, with each plan's price, limits and inclusions under Pricing on this page.

Is the Slate API ready for AI agents?

Slate has a Kin Score of 23.4 out of 100 (emerging) and an Agent Readiness score of 1.9 (human-only), scored by API Evangelist on 2026-11-13.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

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Every operation they expose

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How their score was established

curl "https://apis.io/api/v1/providers/slate/evidence"

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