> ## Documentation Index
> Fetch the complete documentation index at: https://docs.classify.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Liveness check

> Unauthenticated. Returns 200 when the API and database are up.



## OpenAPI

````yaml https://api.classify.ai/openapi.json get /health
openapi: 3.1.0
info:
  title: Classify API
  description: >-
    URL-level classification against the ContentGraph index. Priced per URL,
    never per token. URLs already in ContentGraph return classifications inline
    in under 50ms (Lookup). URLs not in the index return status `unknown` with a
    `job_id`; workers fetch, embed, and classify within seconds (Live Classify).
    Poll the job for results. Every live result joins the index.
  version: '1.0'
servers:
  - url: https://api.classify.ai
security: []
paths:
  /health:
    get:
      tags:
        - System
      summary: Liveness check
      description: Unauthenticated. Returns 200 when the API and database are up.
      operationId: health_health_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema: {}

````