> ## Documentation Index > Fetch the complete documentation index at: https://docs.younegotiate.com/llms.txt > Use this file to discover all available pages before exploring further. # Create upload session > Create or retry a short-lived private S3 upload target for a CSV file. The same creditor, company, and `client_upload_id` returns the same unconsumed session with a refreshed presigned PUT URL. ## OpenAPI ````yaml /api/creditor.openapi.yaml post /import-consumers/uploads openapi: 3.1.0 info: title: YouNegotiate Creditor API version: '2.0' description: >- Stateless API endpoints for creditor portal authentication and account access. servers: - url: https://api.creditor.younegotiate.com description: Production security: [] tags: - name: System description: Public creditor domain system and health endpoints. - name: Authentication description: Creditor registration, login, password, and email verification endpoints. - name: Account Settings description: >- Authenticated creditor profile, contact, operating-hours, and profile-image endpoints. - name: Account Profile description: >- Creditor onboarding profile, membership, billing, and setup status endpoints. - name: Setup Wizard description: >- Creditor setup wizard status, required-step completion, and optional-step completion. - name: Dashboard description: Creditor dashboard work queues and performance widgets. - name: Import / Export description: >- Creditor consumer import upload sessions, queued imports, history, downloads, and failed-row files. - name: Membership Settings description: >- Creditor membership dashboard, plan changes, payment method, cancellation, special-plan inquiry, and over-limit retry endpoints. - name: Merchant Account description: >- Existing merchant processor credentials, Tilled onboarding, and merchant application endpoints. - name: Header Profiles description: >- CSV header profile upload, mapping, download, and setup wizard completion endpoints. - name: SFTP Connections description: >- Creditor-managed SFTP connection profiles for imports, exports, and setup wizard completion. - name: Sub Accounts description: >- Creditor-managed sub account list, export, create, update, and delete endpoints. - name: Pay Terms Offers description: >- Creditor-managed master, sub-account, group, and group-sub-account Pay Terms endpoints. - name: Individual Custom Offers description: Creditor individual custom offer list endpoints. - name: Negotiations description: >- Creditor negotiation work queues, including notice responses and offer review counts. - name: Communications / CFPB Validation Letter description: >- CFPB Validation Letter tables, secure EcoLetter send/resend, CSV export, and print/download actions. - name: Communications / EcoLetter Template description: >- Creditor EcoLetter template management for secure eLetter communications and campaigns. - name: Communications / Groups description: >- Creditor communication group management for dynamic consumer targeting and campaign selection. - name: Communications / Schedule Campaign description: >- Creditor EcoLetter campaign scheduling, quote, immediate send, and delivery queue endpoints. - name: Communications / Campaign Tracker description: >- Creditor campaign tracker reporting, refresh, and consumer export endpoints. - name: Consumer Profiles description: Creditor Consumer Profiles list, filter options, and CSV export endpoints. - name: Terms & Conditions description: Creditor-managed master and sub-account Terms & Conditions templates. - name: About Us & Contact description: Creditor-managed company About Us content shown to consumers. - name: Logo & Links description: >- Creditor-managed master and sub-account personalized logo colors, size, and consumer link metadata. - name: Users description: >- Master creditor user management, invitations, and account deletion endpoints. paths: /import-consumers/uploads: post: tags: - Import / Export summary: Create upload session description: >- Create or retry a short-lived private S3 upload target for a CSV file. The same creditor, company, and `client_upload_id` returns the same unconsumed session with a refreshed presigned PUT URL. operationId: creditorCreateImportUploadSession requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateImportUploadSessionRequest' example: client_upload_id: 2b0f5f25-2bf7-438c-9b09-98c2c6c77a7d filename: consumer-import.csv content_type: text/csv size_bytes: 1048576 responses: '201': description: Upload session returned. content: application/json: schema: $ref: '#/components/schemas/ImportUploadSessionResponse' '401': $ref: '#/components/responses/Unauthenticated' '403': $ref: '#/components/responses/ActiveMembershipRequired' '409': $ref: '#/components/responses/Conflict' '422': $ref: '#/components/responses/ValidationError' security: - bearerAuth: [] components: schemas: CreateImportUploadSessionRequest: type: object required: - client_upload_id - filename properties: client_upload_id: type: string format: uuid filename: type: string maxLength: 300 pattern: \.csv$ content_type: type: string nullable: true example: text/csv size_bytes: type: integer nullable: true minimum: 1 ImportUploadSessionResponse: type: object required: - message - data - upload - meta properties: message: type: string example: Import upload session created. data: $ref: '#/components/schemas/ImportUploadSession' upload: $ref: '#/components/schemas/ImportUploadTarget' meta: type: object properties: max_size_bytes: type: integer ImportUploadSession: type: object required: - id - client_upload_id - filename - disk - s3_key - expires_at properties: id: type: integer client_upload_id: type: string format: uuid filename: type: string disk: type: string example: s3 s3_key: type: string example: >- import_consumers/staged/1/2/2b0f5f25-2bf7-438c-9b09-98c2c6c77a7d/consumer-import.csv content_type: type: string nullable: true size_bytes: type: integer nullable: true expires_at: type: string format: date-time nullable: true consumed_at: type: string format: date-time nullable: true ImportUploadTarget: type: object required: - url - headers - method - expires_at properties: url: type: string format: uri headers: type: object additionalProperties: type: string method: type: string enum: - PUT expires_at: type: string format: date-time nullable: true MessageResponse: type: object required: - message properties: message: type: string ValidationErrorResponse: type: object required: - message - errors properties: message: type: string errors: type: object additionalProperties: type: array items: type: string responses: Unauthenticated: description: Missing or invalid bearer token. content: application/json: schema: $ref: '#/components/schemas/MessageResponse' ActiveMembershipRequired: description: Authenticated creditor does not have an active membership. content: application/json: schema: $ref: '#/components/schemas/MessageResponse' example: message: An active membership is required. Conflict: description: >- Resource state conflict, such as an expired or already consumed upload session. content: application/json: schema: $ref: '#/components/schemas/MessageResponse' ValidationError: description: Request validation failed. content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: Sanctum token ````