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

# Current balance and top-up pricing



## OpenAPI

````yaml /openapi.yaml get /v1/billing
openapi: 3.1.0
info:
  title: Impossibl AI API
  version: 0.0.1
  description: >
    The Impossibl AI API is one API for all AI providers, OpenAI-compatible
    across OpenAI,

    Anthropic, Google, xAI, and more (`GET /v1/models` lists the full catalog),

    billed from a prepaid credit balance.


    Provider usage is billed at provider list prices with no usage markup.

    Prepaid credit purchases charge a separate fixed 5% platform fee before tax.


    **Agent quickstart**

    1. `POST /v1/accounts` — create a funded account; you get an API key and a
       signup-bonus balance in one call (no human step required).
    2. Call `POST /v1/chat/completions`, `POST /v1/responses`, or
       `POST /v1/audio/transcriptions` with
       `Authorization: Bearer <key>` and a `provider/model` id from `GET /v1/models`.
    3. Credits are deducted per request by token or audio-duration usage; check
    `GET /v1/account`.
servers:
  - url: https://api.impossibl.com
    description: Production
  - url: http://localhost:8787
    description: Local dev
security:
  - BearerKey: []
paths:
  /v1/billing:
    get:
      summary: Current balance and top-up pricing
      operationId: getBilling
      responses:
        '200':
          description: Balance, fixed top-up fee, provider-usage markup, and Stripe status
          content:
            application/json:
              schema:
                type: object
                properties:
                  balance:
                    $ref: '#/components/schemas/Balance'
                  min_topup_usd:
                    type: number
                    example: 5
                  platform_fee_rate:
                    type: number
                    const: 0.05
                    description: Fixed fee added to net prepaid credit purchases
                  usage_price_markup:
                    type: number
                    example: 1
                    description: >-
                      Current provider-usage multiplier; production uses 1 for
                      no usage markup
                  stripe_configured:
                    type: boolean
components:
  schemas:
    Balance:
      type: object
      properties:
        credits:
          '0': null
          type: integer
          description: micro-USD (1
          000 = $1): null
        usd:
          type: number
  securitySchemes:
    BearerKey:
      type: http
      scheme: bearer
      description: Gateway API key (`imp-rt-...`) from POST /v1/accounts or /v1/keys.

````