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

# Liveness. Not enveloped.



## OpenAPI

````yaml /api-reference/billing.json get /health
openapi: 3.1.0
info:
  title: truscan billing
  version: 1.0.0
  description: >-
    Credits, metering and top-ups. Money is counted in MICRO-DOLLARS (millionths
    of a dollar) as integers everywhere, so $7.00 per 1,000 requests is exactly
    7,000 micros per request. Floats drift, and a billing system that drifts
    gets disputed. Every amount is accompanied by a pre-formatted display string
    so no client reimplements money formatting. All responses use the {success,
    result, message} envelope except health and the webhook.
servers:
  - url: https://api.truscan.co
    description: Production
security: []
paths:
  /health:
    get:
      summary: Liveness. Not enveloped.
      responses:
        '200':
          description: Alive

````