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

# Credit Purchase History

> List all credit purchases for the authenticated user, ordered by most recent first.



## OpenAPI

````yaml /openapi.json get /api/api-keys/transactions
openapi: 3.1.0
info:
  title: NinjaChat API
  version: 1.0.0
  description: >-
    Access 40+ AI models through a unified API — chat, image generation, video
    generation, and web search. One API key, one endpoint per type, just change
    the `model` parameter.
servers:
  - url: https://www.ninjachat.ai
security:
  - bearerAuth: []
paths:
  /api/api-keys/transactions:
    get:
      tags:
        - Management
      summary: Credit Purchase History
      description: >-
        List all credit purchases for the authenticated user, ordered by most
        recent first.
      operationId: listTransactions
      parameters:
        - name: limit
          in: query
          schema:
            type: integer
            default: 50
            maximum: 200
          description: Number of records to return.
        - name: offset
          in: query
          schema:
            type: integer
            default: 0
          description: Pagination offset.
      responses:
        '200':
          description: Transaction list.
          content:
            application/json:
              schema:
                type: object
                properties:
                  transactions:
                    type: array
                    items:
                      type: object
                      properties:
                        amount:
                          type: string
                          example: $25.00
                        amountCents:
                          type: integer
                          example: 2500
                        type:
                          type: string
                          example: credit_purchase
                        status:
                          type: string
                          example: completed
                        timestamp:
                          type: string
                          format: date-time
                  pagination:
                    type: object
                    properties:
                      total:
                        type: integer
                      limit:
                        type: integer
                      offset:
                        type: integer
                      hasMore:
                        type: boolean
        '401':
          description: Authentication failed.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
components:
  schemas:
    ErrorResponse:
      type: object
      description: >-
        OpenAI-compatible error. The top-level `message`, `code`, and
        `request_id` mirror fields inside `error` for convenience.
      properties:
        error:
          type: object
          properties:
            message:
              type: string
              description: Human-readable error description.
            type:
              type: string
              description: >-
                Error category: invalid_request_error, authentication_error,
                rate_limit_error, insufficient_quota, or api_error.
            code:
              type: string
              description: Machine-readable error code.
            param:
              type: string
              nullable: true
              description: The request parameter that caused the error, if any.
        message:
          type: string
          description: Same as error.message.
        code:
          type: string
          description: Same as error.code.
        request_id:
          type: string
          description: Unique request ID, useful when contacting support.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: API key starting with nj_sk_

````