> ## Documentation Index > Fetch the complete documentation index at: https://spreecommerce.org/docs/llms.txt > Use this file to discover all available pages before exploring further. # Submit against a requirement > What the seller says about one requirement: an attestation they tick, a document they upload, a reference they paste. Create only. A submission records what was said and when, so a seller who needs to correct something submits again rather than editing, and the latest one counts. `file` is **not** a multipart upload — it is the `signed_id` returned by `POST /api/v3/seller/direct_uploads`, so the bytes are already in storage by the time this runs. An attestation is accepted on the spot; a requirement the operator reviews comes back `pending`. ## OpenAPI ````yaml /api-reference/seller.yaml post /api/v3/seller/requirements/{requirement_id}/submissions openapi: 3.0.3 info: title: Seller API contact: name: Spree Commerce url: https://spreecommerce.org email: hello@spreecommerce.org description: | Spree Seller API v3 - the marketplace seller panel, where a seller runs their own shop inside someone else's marketplace. This is a branch of its own, not a narrowing of the Admin API. Every endpoint is scoped server-side to the seller the request acts as, which is what makes cross-seller access impossible by construction rather than by rule. Sellers never call the Admin API. ## Authentication Sign in at `POST /api/v3/seller/auth/login` and send the returned JWT as `Authorization: Bearer `. The token carries a `seller_api` audience — a token minted for the storefront or the back office is not accepted here, and vice versa. There is deliberately **no secret API key** for this branch: a credential that could act as a seller without a seller signing in is exactly what the separate audience exists to prevent. ### Choosing a seller A user may run more than one seller. Login returns the list; send the chosen seller's ID in the `X-Spree-Seller-Id` header on every authenticated request. The store is derived from the seller — never sent — so no header can widen what a seller reaches. A request that names no seller the caller belongs to is rejected with `403`. ## Response Format All responses are JSON. List endpoints return paginated responses with `data` and `meta` keys. ## Error Handling Errors return a consistent format: ```json { "error": { "code": "validation_error", "message": "Validation failed", "details": { "name": ["can't be blank"] } } } ``` version: v3 servers: - url: http://{defaultHost} variables: defaultHost: default: localhost:3000 security: [] tags: - name: Authentication description: Seller sign-in, token refresh, logout, and invitation acceptance - name: Account description: The signed-in user, the sellers they may act for, and what they may do - name: Countries description: Country and state reference data for the panel's address forms - name: Delivery Methods description: >- The seller's own ways to ship, and the marketplace methods shared with them - name: Delivery Profiles description: >- The marketplace's delivery vocabulary — what kind of goods a product is, which decides how it ships - name: Delivery Zones description: >- The marketplace's destinations, for narrowing where a seller's own method ships - name: Onboarding description: >- The marketplace checklist a seller completes before admission, and what they submit against it - name: Policies description: The seller's own legal documents, as the marketplace asks them to publish - name: Product Types description: The types a seller may list a product against, and what each adds - name: Products description: The seller's own catalog - name: Profile description: >- The seller's own record — presentation, contact details, addresses, and tax registration - name: Stock Locations description: Where the seller keeps stock, and so where their returns are sent - name: Team description: Who runs this seller, and the invitations nobody has accepted yet - name: Uploads description: Presigned direct uploads for the documents onboarding asks for paths: /api/v3/seller/requirements/{requirement_id}/submissions: parameters: - name: requirement_id in: path description: Requirement ID, as returned by `GET /api/v3/seller/onboarding` required: true schema: type: string post: tags: - Onboarding summary: Submit against a requirement description: > What the seller says about one requirement: an attestation they tick, a document they upload, a reference they paste. Create only. A submission records what was said and when, so a seller who needs to correct something submits again rather than editing, and the latest one counts. `file` is **not** a multipart upload — it is the `signed_id` returned by `POST /api/v3/seller/direct_uploads`, so the bytes are already in storage by the time this runs. An attestation is accepted on the spot; a requirement the operator reviews comes back `pending`. parameters: - name: X-Spree-Seller-Id in: header required: true schema: type: string requestBody: content: application/json: schema: type: object properties: note: type: string description: Anything the seller wants to say alongside the submission reference: type: string description: >- A reference number or external identifier, for requirements that ask for one file: type: string description: >- A direct-upload `signed_id`, for requirements that ask for a document responses: '201': description: submission recorded content: application/json: example: id: selsub_UkLWZg9DAJ status: accepted note: Confirmed. review_note: null reference: null reviewed_at: '2026-01-15T12:00:00.000Z' created_at: '2026-01-15T12:00:00.000Z' updated_at: '2026-01-15T12:00:00.000Z' file_url: null file_name: null schema: $ref: '#/components/schemas/RequirementSubmission' '404': description: a requirement belonging to another marketplace content: application/json: example: error: code: record_not_found message: Seller requirement not found schema: $ref: '#/components/schemas/ErrorResponse' security: - bearer_auth: [] components: schemas: RequirementSubmission: type: object properties: id: type: string status: anyOf: - type: string enum: - pending - accepted - rejected - waived - type: string description: The values listed are the built-in ones; extensions may add more. note: type: string nullable: true review_note: type: string nullable: true reference: type: string nullable: true reviewed_at: type: string nullable: true created_at: type: string updated_at: type: string file_url: type: string nullable: true file_name: type: string nullable: true required: - id - status - note - review_note - reference - reviewed_at - created_at - updated_at - file_url - file_name x-typelizer: true ErrorResponse: type: object properties: error: type: object properties: code: type: string example: record_not_found message: type: string example: Record not found details: type: object description: Field-specific validation errors nullable: true example: name: - is too short - is required email: - is invalid required: - code - message required: - error example: error: code: validation_error message: Validation failed details: name: - is too short email: - is invalid securitySchemes: bearer_auth: type: http scheme: bearer bearerFormat: JWT description: JWT token for an authenticated seller session (`seller_api` audience) ````