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

# Liveness probe

> Unauthenticated liveness check. Returns `{ "status": "ok" }` when the process is up.



## OpenAPI

````yaml /openapi.json get /health
openapi: 3.1.0
info:
  title: Blink PDF API
  description: >-
    Render Markdown into accessible, PDF/UA-conformant PDFs over HTTP. Send
    Markdown plus optional document metadata, fonts, page layout, viewer hints,
    and per-block style overrides to `POST /v1/render`, or use a structured
    template such as `POST /v1/templates/sandwich-document/render`.
    Authentication is via an `x-api-key` header. Unknown routes return HTTP 404
    with body `{ "error": "not_found" }`.
  version: 1.3.1
  contact:
    name: Blink PDF Support
    email: support@blinkpdf.io
  license:
    name: Proprietary
    identifier: LicenseRef-Proprietary
servers:
  - url: https://api.blinkpdf.io
    description: Production
security: []
tags:
  - name: Discovery
    description: Machine-readable API entry point
  - name: Health
    description: Liveness probes
  - name: Render
    description: Markdown-to-PDF rendering
  - name: Fonts
    description: Hosted font catalog and Google Fonts capability discovery
  - name: SandwichDocument
    description: >-
      Sandwich documents — a first-page header (logo, professional identity,
      subject/context data) and a last-page footer (signature, name) wrapping a
      Markdown body
paths:
  /health:
    get:
      tags:
        - Health
      summary: Liveness probe
      description: >-
        Unauthenticated liveness check. Returns `{ "status": "ok" }` when the
        process is up.
      operationId: livenessProbe
      responses:
        '200':
          description: Service is up
          content:
            application/json:
              schema:
                description: Service is up
                type: object
                required:
                  - status
                properties:
                  status:
                    const: ok
                    type: string

````