Numbers API

Free REST API providing interesting mathematical facts, trivia, dates, and year facts about numbers for educational and fun applications. Returns short, readable facts about any number or date across four categories: trivia, mathematical properties, notable years, and day-of-year historical events. No authentication or API key required.

1 APIs 0 Features

NumbersTriviaMathFactsEducationFreeNo Auth

APIs

Numbers API

Retrieve interesting facts about numbers, mathematical properties, historical year events, and date-specific facts. Supports plain text and JSON response formats with no authent...

Semantic Vocabularies

Numbers Api Context

5 classes · 6 properties

JSON-LD

Resources

Sources

aid: numbers-api
name: Numbers API
description: >
  Free REST API providing interesting mathematical facts, trivia, dates, and
  year facts about numbers for educational and fun applications. Returns short,
  readable facts about any number or date across four categories: trivia,
  mathematical properties, notable years, and day-of-year historical events.
  No authentication or API key required.
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
url: https://raw.githubusercontent.com/api-evangelist/numbers-api/refs/heads/main/apis.yml
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.19'
type: Index
tags:
  - Numbers
  - Trivia
  - Math
  - Facts
  - Education
  - Free
  - No Auth
apis:
  - aid: numbers-api:numbers-api
    name: Numbers API
    description: >
      Retrieve interesting facts about numbers, mathematical properties,
      historical year events, and date-specific facts. Supports plain text
      and JSON response formats with no authentication required.
    image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
    baseURL: http://numbersapi.com
    humanURL: http://numbersapi.com
    tags:
      - Numbers
      - Trivia
      - Math
      - Year
      - Date
      - Facts
    properties:
      - type: Documentation
        url: http://numbersapi.com/#42
      - type: OpenAPI
        url: https://raw.githubusercontent.com/api-evangelist/numbers-api/refs/heads/main/openapi/numbers-api-openapi.yml
common:
  - type: Website
    url: http://numbersapi.com
  - type: Documentation
    url: http://numbersapi.com/#42
  - type: GitHubOrg
    url: https://github.com/divad12
  - type: LinkedIn
    url: https://www.linkedin.com/in/davidhu2000/
  - type: Blog
    url: http://numbersapi.com
  - type: Pricing
    url: http://numbersapi.com
  - type: StatusPage
    url: http://numbersapi.com
  - type: X
    url: https://x.com/numbersapi
  - type: Plans
    url: plans/numbers-api-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/numbers-api-rate-limits.yml
  - type: FinOps
    url: finops/numbers-api-finops.yml
maintainers:
  - FN: Kin Lane
    email: [email protected]