chucknorris.io

Free JSON REST API for hand-curated Chuck Norris jokes (facts) maintained by @matchilling. Supports random retrieval, category filtering, full-text search, and direct lookup by joke identifier. Hosted at api.chucknorris.io with an open-source Spring Boot service (chuck-api), official Node.js and Java client SDKs, a Chrome extension, a Storybook addon, and Messenger / Alexa companion apps published under the chucknorris-io GitHub organization.

chucknorris.io publishes 3 APIs on the APIs.io network: Categories API, Jokes API, and Search API. Tagged areas include Entertainment, Jokes, Chuck Norris, Open Source, and Public APIs.

The chucknorris.io catalog on APIs.io includes 2 JSON-LD contexts and 2 Spectral governance rulesets.

chucknorris.io’s developer surface includes tooling, documentation, engineering blog, pricing, and 18 more developer resources.

🌐 Visit website 📡 Source on GitHub

41.1/100 developing ▬ flat Agent 35/100 agent ready Front door AI 1/6 silent saas Full breakdown ↓
scored 2026-09-25 · rubric v0.23.0

2 APIs 6 Features 4 Use Cases

Entertainment JokesChuck NorrisOpen Source Public APIs

Kin Score

Kin Score How this is scored →
scored 2026-09-25 · rubric v0.23.0

Composite quality — 41.1/100 · developing

Contract Quality 13.8 / 21

Developer Ergonomics 5.3 / 17

Access Clarity 6.4 / 17

Operational Transparency 1.2 / 11

Contract Governance 2.8 / 10

Discoverability 5.5 / 9

Regulatory Posture 2.5 / 15

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

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 does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/.

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/chucknorris-io: 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 3

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

chucknorris.io Categories API

Joke category metadata.

chucknorris.io Jokes API

Chuck Norris jokes (facts) endpoints.

chucknorris.io Search API

Full-text search across the joke corpus.

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Chuck Norris Jokes Categories API

OPEN COLLECTION

Chuck Norris Categories Jokes API

OPEN COLLECTION

Chuck Norris Jokes Categories Search API

OPEN COLLECTION

Chuck Norris Jokes API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Chucknorris Io Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Chucknorris Io Rate Limits

0 limits

RATE LIMITS

FinOps 1

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

Chucknorris Io Finops

FINOPS

Features 6

Notable capabilities this provider offers.

Random Joke

GET /jokes/random returns a single random Chuck Norris fact.

Random Joke By Category

GET /jokes/random?category={category} constrains random selection.

List Categories

GET /jokes/categories returns the 16 supported category identifiers.

Free-Text Search

GET /jokes/search?query={query} returns matching jokes with a total count.

Lookup By Id

GET /jokes/{id} retrieves a single joke by its identifier.

Plain-Text Variant

All endpoints honor Accept text/plain for shell-friendly output.

Semantic Vocabularies 2

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

Chucknorris Io Context

5 classes · 8 properties

JSON-LD

context Context

4 classes · 8 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

chucknorris.io API Rules

5 rules · 4 warnings 1 info

SPECTRAL

chucknorris.io API Rules

10 rules · 4 errors 6 warnings

SPECTRAL

JSON Schema 6

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

CategoryList

0 properties

JSON SCHEMA

Error

5 properties

JSON SCHEMA

Joke

7 properties

JSON SCHEMA

SearchResult

2 properties

JSON SCHEMA

JokeSearchResult

2 properties

JSON SCHEMA

Joke

7 properties

JSON SCHEMA

JSON Structure 4

JSON Structure definitions describing this provider's data shapes.

Chucknorris Io Category List Structure

0 properties

JSON STRUCTURE

Chucknorris Io Error Structure

5 properties

JSON STRUCTURE

Chucknorris Io Joke Structure

7 properties

JSON STRUCTURE

Chucknorris Io Search Result Structure

2 properties

JSON STRUCTURE

Examples 10

Example request and response payloads for these APIs.

Chucknorris Io Error Example

4 fields

EXAMPLE

Chucknorris Io Getjokebyid Example

5 fields

EXAMPLE

Chucknorris Io Getrandomjoke By Category Example

5 fields

EXAMPLE

Chucknorris Io Getrandomjoke Example

5 fields

EXAMPLE

Chucknorris Io Joke Example

7 fields

EXAMPLE

Chucknorris Io Listcategories Example

5 fields

EXAMPLE

Chucknorris Io Search Result Example

2 fields

EXAMPLE

Chucknorris Io Searchjokes Example

5 fields

EXAMPLE

Random Joke

7 fields

EXAMPLE

Search Result

2 fields

EXAMPLE

Scroll for all 10

Security Posture 1

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

Chucknorris Io Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Chucknorris Io Agentic Access

4 operations

4 operations · 0 acting

AGENTIC

Use Cases 4

What developers build with this provider.

Demo Data Source

Tutorial-friendly free public API for learning HTTP clients, SDKs, and AI tool patterns.

Chat & Bot Surfaces

Slack, Messenger, and Alexa surfaces inject random facts on demand.

Developer Toy

Storybook addon and Chrome extension use the API to entertain developers.

Load & Reliability Testing

Lightweight, no-auth endpoints are useful targets for HTTP client smoke tests.

Integrations 5

Pre-built integrations with other platforms and tools.

Slack

Slack slash command integration referenced in the public docs.

Facebook Messenger

Companion Messenger bot (chucknorris-io/app-facebook-messenger).

Alexa

Companion Alexa skill (chucknorris-io/app-alexa-skill).

Google Chrome

Official Chrome extension surfacing facts in the browser.

Storybook

Storybook addon injecting Chuck Norris facts into dev workflows.

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

SpectralRules

SpectralRules

Vocabulary

Vocabulary

Build 6

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubRepository

SDKs

SDKs

GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

License

Pricing

Plans

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 2

Properties that don't map to a standard resource type

PublicAPIsListing

PublicAPIsListing

Source (apis.yml)

aid: chucknorris-io
name: chucknorris.io
description: Free JSON REST API for hand-curated Chuck Norris jokes (facts) maintained by @matchilling. Supports random retrieval,
  category filtering, full-text search, and direct lookup by joke identifier. Hosted at api.chucknorris.io with an open-source
  Spring Boot service (chuck-api), official Node.js and Java client SDKs, a Chrome extension, a Storybook addon, and Messenger
  / Alexa companion apps published under the chucknorris-io GitHub organization.
url: https://api.chucknorris.io
deliveryModel:
  model: saas
  license_evidence:
    not_product:
    - chucknorris-io/chuck-api
  open_source: unknown
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: low
  source:
  - openapi
  - pricing
  - repository-not-product
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://api.chucknorris.io/img/avatar/chuck-norris.png
specificationVersion: '0.23'
created: '2026-05-28'
modified: '2026-08-08'
x-source: public-apis/public-apis
x-category: Entertainment
x-type: opensource
x-tier: 3
x-tier-reason: bulk-registered-from-public-apis
tags:
- Entertainment
- Jokes
- Chuck Norris
- Open Source
- Public APIs
tags_raw:
- Entertainment
- Jokes
- Chuck Norris
- Open Source
- Public APIs
- Open-Source
apis:
- aid: chucknorris-io:chucknorris-io-categories-api
  name: chucknorris.io Categories API
  description: Joke category metadata.
  humanURL: https://api.chucknorris.io
  tags:
  - Categories
  properties:
  - type: OpenAPI
    url: openapi/chucknorris-io-categories-api-openapi.yml
  - type: Documentation
    url: https://api.chucknorris.io
  - type: JSONSchema
    url: json-schema/chucknorris-io-joke-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-category-list-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-search-result-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-error-schema.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-joke-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-category-list-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-search-result-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-error-structure.json
  - type: JSONLD
    url: json-ld/chucknorris-io-context.jsonld
  - type: Examples
    url: examples/chucknorris-io-getRandomJoke-example.json
  - type: Examples
    url: examples/chucknorris-io-getRandomJoke-by-category-example.json
  - type: Examples
    url: examples/chucknorris-io-listCategories-example.json
  - type: Examples
    url: examples/chucknorris-io-searchJokes-example.json
  - type: Examples
    url: examples/chucknorris-io-getJokeById-example.json
  - type: Examples
    url: examples/chucknorris-io-joke-example.json
  - type: Examples
    url: examples/chucknorris-io-category-list-example.json
  - type: Examples
    url: examples/chucknorris-io-search-result-example.json
  - type: Examples
    url: examples/chucknorris-io-error-example.json
  - type: Authentication
    url: https://api.chucknorris.io
  - type: RateLimits
    url: https://api.chucknorris.io
- aid: chucknorris-io:chucknorris-io-jokes-api
  name: chucknorris.io Jokes API
  description: Chuck Norris jokes (facts) endpoints.
  humanURL: https://api.chucknorris.io
  tags:
  - Jokes
  properties:
  - type: OpenAPI
    url: openapi/chucknorris-io-jokes-api-openapi.yml
  - type: Documentation
    url: https://api.chucknorris.io
  - type: JSONSchema
    url: json-schema/chucknorris-io-joke-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-category-list-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-search-result-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-error-schema.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-joke-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-category-list-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-search-result-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-error-structure.json
  - type: JSONLD
    url: json-ld/chucknorris-io-context.jsonld
  - type: Examples
    url: examples/chucknorris-io-getRandomJoke-example.json
  - type: Examples
    url: examples/chucknorris-io-getRandomJoke-by-category-example.json
  - type: Examples
    url: examples/chucknorris-io-listCategories-example.json
  - type: Examples
    url: examples/chucknorris-io-searchJokes-example.json
  - type: Examples
    url: examples/chucknorris-io-getJokeById-example.json
  - type: Examples
    url: examples/chucknorris-io-joke-example.json
  - type: Examples
    url: examples/chucknorris-io-category-list-example.json
  - type: Examples
    url: examples/chucknorris-io-search-result-example.json
  - type: Examples
    url: examples/chucknorris-io-error-example.json
  - type: Authentication
    url: https://api.chucknorris.io
  - type: RateLimits
    url: https://api.chucknorris.io
- aid: chucknorris-io:chucknorris-io-search-api
  name: chucknorris.io Search API
  description: Full-text search across the joke corpus.
  humanURL: https://api.chucknorris.io
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/chucknorris-io-search-api-openapi.yml
  - type: Documentation
    url: https://api.chucknorris.io
  - type: JSONSchema
    url: json-schema/chucknorris-io-joke-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-category-list-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-search-result-schema.json
  - type: JSONSchema
    url: json-schema/chucknorris-io-error-schema.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-joke-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-category-list-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-search-result-structure.json
  - type: JSONStructure
    url: json-structure/chucknorris-io-error-structure.json
  - type: JSONLD
    url: json-ld/chucknorris-io-context.jsonld
  - type: Examples
    url: examples/chucknorris-io-getRandomJoke-example.json
  - type: Examples
    url: examples/chucknorris-io-getRandomJoke-by-category-example.json
  - type: Examples
    url: examples/chucknorris-io-listCategories-example.json
  - type: Examples
    url: examples/chucknorris-io-searchJokes-example.json
  - type: Examples
    url: examples/chucknorris-io-getJokeById-example.json
  - type: Examples
    url: examples/chucknorris-io-joke-example.json
  - type: Examples
    url: examples/chucknorris-io-category-list-example.json
  - type: Examples
    url: examples/chucknorris-io-search-result-example.json
  - type: Examples
    url: examples/chucknorris-io-error-example.json
  - type: Authentication
    url: https://api.chucknorris.io
  - type: RateLimits
    url: https://api.chucknorris.io
common:
- type: IssueTracker
  url: https://github.com/chucknorris-io/chuck-api/issues
- type: AgenticAccess
  url: agentic-access/chucknorris-io-agentic-access.yml
- type: DomainSecurity
  url: security/chucknorris-io-domain-security.yml
- type: Website
  url: https://api.chucknorris.io
- type: GitHubOrganization
  url: https://github.com/chucknorris-io
- type: GitHubRepository
  url: https://github.com/chucknorris-io/chuck-api
- type: License
  url: https://github.com/chucknorris-io/chuck-api/blob/master/LICENSE
  data:
  - name: GPL-3.0
    description: Service source (chuck-api) is licensed GPL-3.0.
- type: PublicAPIsListing
  url: https://github.com/public-apis/public-apis
- type: SpectralRules
  url: rules/chucknorris-io-rules.yml
- type: Vocabulary
  url: vocabulary/chucknorris-io-vocabulary.yml
- type: SDKs
  url: https://github.com/chucknorris-io/client-nodejs
  data:
  - name: client-nodejs
    description: Official Node.js client library (GPL-3.0).
- type: SDKs
  url: https://github.com/chucknorris-io/client-java
  data:
  - name: client-java
    description: Official Java client library (Apache-2.0).
- type: Integrations
  data:
  - name: Slack
    description: Slack slash command integration referenced in the public docs.
  - name: Facebook Messenger
    description: Companion Messenger bot (chucknorris-io/app-facebook-messenger).
  - name: Alexa
    description: Companion Alexa skill (chucknorris-io/app-alexa-skill).
  - name: Google Chrome
    description: Official Chrome extension surfacing facts in the browser.
  - name: Storybook
    description: Storybook addon injecting Chuck Norris facts into dev workflows.
- type: Features
  data:
  - name: Random Joke
    description: GET /jokes/random returns a single random Chuck Norris fact.
  - name: Random Joke By Category
    description: GET /jokes/random?category={category} constrains random selection.
  - name: List Categories
    description: GET /jokes/categories returns the 16 supported category identifiers.
  - name: Free-Text Search
    description: GET /jokes/search?query={query} returns matching jokes with a total count.
  - name: Lookup By Id
    description: GET /jokes/{id} retrieves a single joke by its identifier.
  - name: Plain-Text Variant
    description: All endpoints honor Accept text/plain for shell-friendly output.
- type: UseCases
  data:
  - name: Demo Data Source
    description: Tutorial-friendly free public API for learning HTTP clients, SDKs, and AI tool patterns.
  - name: Chat & Bot Surfaces
    description: Slack, Messenger, and Alexa surfaces inject random facts on demand.
  - name: Developer Toy
    description: Storybook addon and Chrome extension use the API to entertain developers.
  - name: Load & Reliability Testing
    description: Lightweight, no-auth endpoints are useful targets for HTTP client smoke tests.
- type: Tools
  data:
  - name: Postman Collection
    description: Maintained by the chucknorris-io org at chuck-infra-tools/api_postman_collection.json.
  - name: Third-Party MCP Servers
    description: Community MCP servers wrap api.chucknorris.io (e.g., thomasma/chuckjokes-mcpserver, BACH-AI-Tools/chuck_norris).
      No first-party MCP server.
- type: Documentation
  url: https://api.chucknorris.io
- type: GitHubOrg
  url: https://github.com/chucknorris-io
- type: LinkedIn
  url: https://www.linkedin.com/company/chucknorris-io
- type: Blog
  url: https://api.chucknorris.io
- type: Pricing
  url: https://api.chucknorris.io
- type: StatusPage
  url: https://status.chucknorris.io
- type: X
  url: https://twitter.com/MatChilling
- type: Plans
  url: plans/chucknorris-io-plans-pricing.yml
- type: RateLimits
  url: rate-limits/chucknorris-io-rate-limits.yml
- type: FinOps
  url: finops/chucknorris-io-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-merged-from:
- chuck-norris

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