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OpenAPI Specification

openapi: 3.2.0
info:
  title: Fattly Account API
  version: 1.0.0
  summary: UGC video ads, AI images, video and voiceovers from 40+ models.
  description: 'REST API of fattly.app — the same engine as the web app, the CLI (`npm i -g fattly`) and the MCP server (`https://fattly.app/api/mcp`).


    **Auth:** create a key at fattly.app → Dashboard → API keys and send `Authorization: Bearer gpx_live_...`.


    **Billing:** every generation spends credits from the key owner''s account (GET /api/models lists prices). Failed generations are refunded automatically. Keys can have a daily spend limit.


    **Async jobs:** video, video ads and other long jobs return an `id` — poll GET /api/video/status?id=... every 5-10 s until `completed` or `failed`.


    **Inputs:** image inputs must be URLs returned by POST /api/upload.


    **Content policy:** safe-for-work only, adults only, use only faces and voices you have the right to use.


    **Ad presets and creator avatars:** preset ids (templateId) and avatars are listed by the MCP tools fattly_list_ad_presets and fattly_create_avatar (MCP server: https://fattly.app/api/mcp).'
  contact:
    name: Fattly
    url: https://fattly.app
    email: contact@fattly.app
  termsOfService: https://fattly.app/regulamin
servers:
- url: https://fattly.app
security:
- bearerAuth: []
tags:
- name: Account
paths:
  /api/credits:
    get:
      tags:
      - Account
      operationId: getCredits
      summary: Credit balance
      responses:
        '200':
          description: Balance
          content:
            application/json:
              schema:
                type: object
                properties:
                  credits:
                    type: integer
                required:
                - credits
        '400':
          description: Invalid input or blocked content
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Missing, invalid or revoked API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '402':
          description: Not enough credits
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limit or daily key spend limit reached
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
  /api/models:
    get:
      tags:
      - Account
      operationId: listModels
      summary: Models and prices (public, no key)
      security: []
      responses:
        '200':
          description: Catalog of image, video and audio models with prices in credits
          content:
            application/json:
              schema:
                type: object
  /api/upload:
    post:
      tags:
      - Account
      operationId: uploadImage
      summary: Upload an image (free)
      description: Uploads a JPG, PNG or WEBP image (max 10 MB) and returns a URL to use as an input image in other endpoints.
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              properties:
                file:
                  type: string
                  format: binary
                kind:
                  type: string
                  enum:
                  - image
                  default: image
              required:
              - file
      responses:
        '200':
          description: Uploaded
          content:
            application/json:
              schema:
                type: object
                properties:
                  url:
                    type: string
                    format: uri
                    description: Link to the finished file (signed, valid about 1 hour — download it or fetch a fresh link).
                required:
                - url
        '400':
          description: Invalid input or blocked content
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '401':
          description: Missing, invalid or revoked API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '402':
          description: Not enough credits
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
        '429':
          description: Rate limit or daily key spend limit reached
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'
components:
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
      required:
      - error
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key gpx_live_... from fattly.app → Dashboard → API keys.
externalDocs:
  description: MCP / Claude setup
  url: https://fattly.app/claude-mcp