API Stylebook's API

Name: API Stylebook's API API
Brand: API Stylebook's API
Availability: InStock

★ Only Publicly Available OpenAPI DocumentDeveloper ToolsProject Managementnone6 EndpointsREST

For Agents

Look up API design guidelines and topics from the API Stylebook so an agent can cite established design conventions during API reviews.

Quickstart

Get started with API Stylebook's API in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"look up an API design guideline"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with API Stylebook's API API.

List all curated API design guidelines

Fetch a specific guideline by id with its referenced topics

List API design topics covered across the stylebook

Fetch a topic by id and discover the guidelines that address it

Switch between JSON and HTML representations via the {format} path parameter

GET STARTED

Start building with API Stylebook's API API

Explore with Jentic

View OpenAPI Document

Jentic publishes the only available OpenAPI document for API Stylebook's API, keeping it validated and agent-ready.

Jentic publishes the only available OpenAPI specification for API Stylebook's API, keeping it validated and agent-ready. The API Stylebook serves curated API design guidelines and topics drawn from public style guides published by API teams. Six endpoints expose lists of guidelines and topics, plus the cross-references between them, in JSON or HTML formats. The API is read-only and unauthenticated, intended for tooling that surfaces API design guidance during reviews and architectural decisions.

Use Cases

Patterns agents use API Stylebook's API API for, with concrete tasks.

★ API Review Citation Helper

During pull request reviews on an OpenAPI spec, surface relevant API Stylebook guidelines for topics like error formats, pagination, and versioning. The /design/topics.{format} and /design/topics/{topicId}/guidelines.{format} endpoints return cross-references so a review bot can cite published industry guidance instead of relying only on the reviewer's memory.

Fetch /design/topics.json, find the topic id for 'pagination', then GET /design/topics/{topicId}/guidelines.json and post the matching guideline links as a PR comment

Design Decision Brief

Generate a short brief on how leading API teams handle a design topic by pulling all guidelines for that topic from /design/topics/{topicId}/guidelines and summarising them. Useful when an architect is deciding on a convention and wants prior art rather than first-principles debate.

Pull all guidelines for the topic id matching 'errors', then synthesise a one-page brief comparing the recommended error response shapes

Stylebook Mirroring

Mirror the API Stylebook content into an internal developer portal by paginating /design/guidelines.json and /design/topics.json on a schedule and pushing the results into a search index. This keeps internal API reviewers offline-friendly without scraping HTML pages.

GET /design/guidelines.json and /design/topics.json, normalise the responses, and upsert them into the company's internal search index

Agent Design Coach via Jentic

Wire an AI design-review agent so that when it inspects an OpenAPI spec it can call the API Stylebook through Jentic to fetch relevant guidelines on the fly. The agent searches Jentic for 'list API design topics', loads the schema, and looks up matching guidance per finding.

Search Jentic for 'list API design topics', load the schema for /design/topics.json, and resolve the topic id for 'versioning' before recommending guidelines to the user

Key Endpoints

6 endpoints — jentic publishes the only available openapi specification for api stylebook's api, keeping it validated and agent-ready.

METHOD

PATH

DESCRIPTION

GET

/design/guidelines.{format}

List all guidelines

GET

/design/guidelines/{guidelineId}.{format}

Fetch a guideline by id

GET

/design/guidelines/{guidelineId}/topics.{format}

List topics referenced by a guideline

GET

/design/topics.{format}

List all topics

GET

/design/topics/{topicId}.{format}

Fetch a topic by id

GET

/design/topics/{topicId}/guidelines.{format}

List guidelines covering a topic

GET

/design/guidelines.{format}

List all guidelines

GET

/design/guidelines/{guidelineId}.{format}

Fetch a guideline by id

GET

/design/guidelines/{guidelineId}/topics.{format}

List topics referenced by a guideline

GET

/design/topics.{format}

List all topics

GET

/design/topics/{topicId}.{format}

Fetch a topic by id

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

The API Stylebook's API is unauthenticated, so no credentials are stored. Jentic still routes the call through its execution layer for consistent observability alongside authenticated APIs in the same workflow.

Intent-based discovery

Agents search Jentic with intents like 'list API design topics' and Jentic returns the matching API Stylebook operation with its schema — no need to read the GitHub Pages site to find paths.

Time to first call

Direct integration: a couple of hours to handle the {format} parameter and traverse cross-references. Through Jentic: under 15 minutes — search, load, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Complementary

GitHub API

GitHub hosts the OpenAPI specs and PRs that an API Stylebook agent would review

Pair when the agent fetches a spec or a PR diff from GitHub and then consults the API Stylebook for relevant guidance.

Complementary

GitLab API

GitLab plays the same role as GitHub for teams hosting their API specs there

Use when the API spec or merge request lives on GitLab and the agent needs to leave a review comment with stylebook references.

Complementary

Notion API

Notion hosts the internal style guide pages that complement the public API Stylebook

Pair when an internal style guide lives in Notion and the agent should reconcile internal rules with public stylebook guidance.

FAQs

Specific to using API Stylebook's API API through Jentic.

Why is there no official OpenAPI spec for API Stylebook's API?

The API Stylebook does not publish an OpenAPI specification. Jentic generates and maintains this spec so that AI agents and developers can call API Stylebook's API via structured tooling. It is validated against the live API and kept up to date. Get started at https://app.jentic.com/sign-up.

What authentication does the API Stylebook's API require?

None. The API is read-only and unauthenticated. You can call the endpoints directly. When used through Jentic, no credential entry is needed in the vault for this API.

Can I get the API Stylebook content as JSON?

Yes. Every endpoint accepts a {format} path parameter; pass 'json' (e.g. /design/guidelines.json) to get JSON, or 'html' for the rendered page.

What are the rate limits for the API Stylebook's API?

The site is hosted on GitHub Pages, so it inherits GitHub Pages bandwidth limits (effectively soft, but heavy scraping is discouraged). Cache responses locally rather than calling per request.

How do I find guidelines on a specific design topic through Jentic?

Run pip install jentic, then search Jentic with 'list API Stylebook topics', load the schema for GET /design/topics.json, find the matching topic id, and call GET /design/topics/{topicId}/guidelines.json to fetch the cross-referenced guidelines.

Can I look up which topics a specific guideline covers?

Yes. GET /design/guidelines/{guidelineId}/topics.{format} returns the topics referenced by that guideline, which is useful for building reverse indexes.