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

# Register an observed lot

> Register a lot value that appeared in scan history but was never registered. Idempotent: a value the product already has returns that lot. Requires CONTRIBUTE; 403 at the plan's lot allowance.



## OpenAPI

````yaml /openapi/openapi-products.json post /products/api/v1/products/{gtin}/lots/register-observed
openapi: 3.1.0
info:
  title: Products API
  version: 1.0.0
  description: >
    Look up, claim, and browse GTINs in the Closient product repository.


    ## Authentication


    All endpoints require an API key passed via the `X-API-Key` HTTP header,
    unless otherwise noted.


    ```

    X-API-Key: csb_<body>_<checksum>

    ```


    Generate API keys in **Settings > API Keys** in your dashboard, or via the
    Account API.

    Session-based (cookie) authentication is also accepted for browser-based
    access.


    ## Rate Limits


    | Tier        | Requests / minute | Requests / day |

    |-------------|-------------------|----------------|

    | Default     | 300               | 10,000         |

    | Custom      | Contact us        | Contact us     |


    Rate-limit headers are included on every response so callers can
    self-throttle without

    hitting our 429s ("informed governor"):


    - `RateLimit-Policy` — every active window, e.g. `300;w=60, 10000;w=86400`

    - `RateLimit-Limit` — quota for the **most-restrictive** currently-active
    window

    - `RateLimit-Remaining` — requests left in that window

    - `RateLimit-Reset` — seconds until that window resets (relative; clock-skew
    safe)


    Legacy `X-RateLimit-*` aliases are also emitted for back-compat.
    `X-RateLimit-Reset`

    keeps the absolute Unix-timestamp shape to avoid breaking existing
    consumers.


    When rate-limited, you receive `429 Too Many Requests` with a
    `retry_after_seconds` field

    in the error envelope and a `Retry-After` header.


    ## Pagination


    List endpoints return paginated results in this envelope:


    ```json

    {
      "data": [...],
      "pagination": {
        "page": 1,
        "page_size": 25,
        "total_count": 342,
        "total_pages": 14,
        "has_next": true,
        "has_previous": false
      }
    }

    ```


    Use `?page=2&page_size=50` query parameters. Maximum page size is 100.


    ## Error Responses


    All errors conform to [RFC 9457 Problem
    Details](https://www.rfc-editor.org/rfc/rfc9457)

    with `Content-Type: application/problem+json`:


    ```json

    {
      "type": "https://closient.com/docs/errors/not_found",
      "title": "Not Found",
      "status": 404,
      "detail": "The requested resource was not found.",
      "error_code": "not_found",
      "retryable": false,
      "timestamp": "2026-03-31T12:00:00+00:00"
    }

    ```


    Common error codes: `unauthorized` (401), `forbidden` (403), `not_found`
    (404),

    `validation_error` (422), `rate_limited` (429), `internal_error` (500).
  termsOfService: https://www.closient.com/terms/
servers:
  - url: https://www.closient.com
security: []
tags:
  - name: Products
    description: Look up, claim, and browse products.
  - name: Product Group
    description: Manage GDSN packaging hierarchy relationships.
  - name: Import
    description: >-
      Bulk import products, batch/lots (GS1 AI 10) and serial numbers (GS1 AI
      21) from CSV, TSV or XLSX files, with a downloadable template per entity.
  - name: QR
    description: Generate QR codes encoding GS1 Digital Link URLs.
  - name: Codes
    description: Generate GS1 DataMatrix and 1D barcodes (EAN/UPC/ITF-14/Code128).
  - name: Digital Link
    description: >-
      Parse GS1 Digital Link URIs into structured AIs (GTIN, lot, expiry,
      serial).
  - name: Labels
    description: >-
      Bulk label-export jobs: ZIPs of QR / DataMatrix / 1D symbols and multi-up
      sheet PDFs, asynchronous, with status polling.
  - name: Lots
    description: >-
      Lot generator v2: format templates with persistent counters,
      reserve/commit/discard runs, soft/hard collision handling, and an
      asynchronous path with SSE progress.
  - name: Lots and serials
    description: >-
      The lots (GS1 AI 10) and serials (GS1 AI 21) registered on one of the
      organization's products: list, read, create, update and delete each, or
      register a value seen in scan history.
  - name: Retailer Catalog Import
    description: >-
      Server-side retailer catalog import jobs: stage normalised rows, then run
      the GTIN-keyed cross-retailer merge with a dry-run mode, per-field
      provenance and a quarantine report for every row refused.
  - name: HRI Presets
    description: >-
      Saved, named per-organisation Human Readable Interpretation (HRI)
      configurations — placement, layout, notation and typography. Referenceable
      by name from the QR generation endpoint, with an org default applied when
      no options or preset are supplied.
  - name: PIP Embed (Public)
    description: >-
      Unauthenticated, cross-origin read powering the embeddable PIP panel
      (`/widget/v1/pip-panel.js`) that retailers drop into their own product
      detail pages. Reduced to the disclosure level the hosted page would serve
      an anonymous visitor.
  - name: Recipes
    description: >-
      Recipes shown on a product's hosted page. Create a recipe, attach it to
      the organization's products by GTIN, and update or delete it.
  - name: Firmware
    description: >-
      Firmware releases shown on a product's hosted page. Publish a release for
      the organization's products by GTIN, mark it latest or stable, and update
      or delete it.
  - name: App Links
    description: >-
      Companion-app download and launch links shown on a product's hosted page,
      one per platform. Create, list, update and delete the links on the
      organization's products.
  - name: Replacement Parts
    description: >-
      Replacement parts shown on a product's hosted page. List one of the
      organization's products as a part of another, repoint it, or remove it.
  - name: Accessories
    description: >-
      Accessories shown on a product's hosted page. List one of the
      organization's products as an accessory of another, repoint it, or remove
      it.
  - name: Consumables
    description: >-
      Consumables shown on a product's hosted page (filters, refills,
      cartridges). List one of the organization's products as a consumable of
      another, with its lifespan and whether it is required, repoint it, or
      remove it.
  - name: Product Families
    description: >-
      Consumer variant groups: one organization's products that are the same
      concept in different sizes, shades, flavors or scents. Create a family,
      then add, update, reorder and remove its member products. Distinct from
      Product Group, which is packaging hierarchy.
  - name: Product Links
    description: >-
      Generic, GS1-link-type-keyed brand CTA links (e.g. reviews, promotions,
      loyalty programs, homepage) attached to a product or a brand and rendered
      on the hosted page.
externalDocs:
  description: Closient Documentation
  url: https://docs.closient.com
paths:
  /products/api/v1/products/{gtin}/lots/register-observed:
    post:
      tags:
        - Lots and serials
      summary: Register an observed lot
      description: >-
        Register a lot value that appeared in scan history but was never
        registered. Idempotent: a value the product already has returns that
        lot. Requires CONTRIBUTE; 403 at the plan's lot allowance.
      operationId: register_observed_lot
      parameters:
        - in: path
          name: gtin
          schema:
            description: >-
              GTIN barcode (8, 12, 13 or 14 digits), normalized to GTIN-14 for
              lookup.
            pattern: ^[0-9]{8,14}$
            title: Gtin
            type: string
          required: true
          description: >-
            GTIN barcode (8, 12, 13 or 14 digits), normalized to GTIN-14 for
            lookup.
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/RegisterObservedLot'
        required: true
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LotOut'
        '400':
          description: Bad Request
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '401':
          description: Unauthorized
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '403':
          description: Forbidden
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '404':
          description: Not Found
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '405':
          description: Method Not Allowed
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '422':
          description: Unprocessable Content
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
        '429':
          description: Too Many Requests
          content:
            application/problem+json:
              schema:
                $ref: '#/components/schemas/ErrorOut'
      security:
        - APIKeyHeaderAuth: []
        - OAuthTokenAuth: []
        - CookieGatedSessionAuth: []
components:
  schemas:
    RegisterObservedLot:
      description: Payload for ``POST /products/{gtin}/lots/register-observed``.
      examples:
        - lot_identifier: L2026-14
      properties:
        lot_identifier:
          description: >-
            A lot value seen in scan history but never registered: 1 to 20
            printable ASCII characters.
          maxLength: 20
          minLength: 1
          pattern: ^[!-~]{1,20}$
          title: Lot Identifier
          type: string
      required:
        - lot_identifier
      title: RegisterObservedLot
      type: object
    LotOut:
      description: A lot as read from the API. Mirrors ``ProductLot``.
      examples:
        - created: '2026-09-01T09:00:00Z'
          expiration_date: '2027-09-01'
          gtin: '00850012345671'
          id: keATfB8VP2gSjcnTbsMNQL
          lot_identifier: L2026-14
          modified: '2026-09-01T09:00:00Z'
          product_id: SBjSX6xUJPPHQKUXBpYX2C
          production_date: '2026-09-01T08:00:00Z'
          quantity: 1200
          unit_of_measure: CS
      properties:
        id:
          description: >-
            URL-safe 22-character shortuuid encoding of the row's UUID primary
            key. Stable across the row's lifetime; suitable for sharing in URLs,
            log lines, and external SDK clients. Accepted on input as either the
            shortuuid form or the canonical UUID form
            (``xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx``).
          format: shortuuid
          maxLength: 22
          minLength: 22
          pattern: ^[23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{22}$
          title: Id
          type: string
        product_id:
          description: The product this lot belongs to.
          format: shortuuid
          maxLength: 22
          minLength: 22
          pattern: ^[23456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{22}$
          title: Product Id
          type: string
        gtin:
          description: The product's GTIN, normalized to GTIN-14.
          title: Gtin
          type: string
        lot_identifier:
          description: GS1 AI(10) batch or lot number.
          title: Lot Identifier
          type: string
        production_date:
          anyOf:
            - format: date-time
              type: string
            - type: 'null'
          description: When the lot was produced. Null when unset.
          title: Production Date
        expiration_date:
          anyOf:
            - format: date
              type: string
            - type: 'null'
          description: Expiration date (GS1 AI 17). Null when unset.
          title: Expiration Date
        best_before_date:
          anyOf:
            - format: date
              type: string
            - type: 'null'
          description: Best-before date (GS1 AI 15). Null when unset.
          title: Best Before Date
        quantity:
          anyOf:
            - type: number
            - type: 'null'
          description: Total quantity in the lot. Null when unset.
          title: Quantity
        unit_of_measure:
          anyOf:
            - $ref: '#/components/schemas/UnitOfMeasureEnum'
            - type: 'null'
          description: Unit of the lot's quantity. Null when unset.
        created:
          description: Server-side ISO 8601 timestamp of creation (UTC).
          format: date-time
          title: Created
          type: string
        modified:
          description: Server-side ISO 8601 timestamp of last modification (UTC).
          format: date-time
          title: Modified
          type: string
      required:
        - id
        - product_id
        - gtin
        - lot_identifier
        - created
        - modified
      title: LotOut
      type: object
    ErrorOut:
      description: |-
        RFC 9457 Problem Details response.

        All API errors are returned in this format with Content-Type:
        application/problem+json.
      examples:
        - detail: The requested resource was not found.
          error_code: not_found
          retryable: false
          status: 404
          timestamp: '2026-03-31T12:00:00+00:00'
          title: Not Found
          type: https://closient.com/docs/errors/not_found
        - detail: Validation error.
          details:
            - loc:
                - body
                - name
              msg: Field required
              type: missing
          error_code: validation_error
          retryable: false
          status: 422
          timestamp: '2026-03-31T12:00:00+00:00'
          title: Validation Error
          type: https://closient.com/docs/errors/validation_error
        - detail: Rate limit exceeded. Please try again later.
          error_code: rate_limited
          retry_after: 31
          retryable: true
          status: 429
          timestamp: '2026-03-31T12:00:00+00:00'
          title: Rate Limited
          type: https://closient.com/docs/errors/rate_limited
      properties:
        type:
          description: URI reference identifying the error type.
          title: Type
          type: string
        title:
          description: Short human-readable summary of the error.
          title: Title
          type: string
        status:
          description: HTTP status code.
          title: Status
          type: integer
        detail:
          description: Human-readable explanation of this specific occurrence.
          title: Detail
          type: string
        error_code:
          description: Machine-readable error code (e.g. not_found, unauthorized).
          title: Error Code
          type: string
        retryable:
          default: false
          description: Whether retrying the same request can succeed.
          title: Retryable
          type: boolean
        timestamp:
          description: ISO 8601 timestamp of when the error occurred.
          title: Timestamp
          type: string
        retry_after:
          anyOf:
            - type: integer
            - type: 'null'
          description: Seconds to wait before retrying (when applicable).
          title: Retry After
        owner_action_required:
          anyOf:
            - type: boolean
            - type: 'null'
          description: Whether the error requires account owner intervention.
          title: Owner Action Required
        details:
          description: Additional context (validation errors, etc.).
          title: Details
      required:
        - type
        - title
        - status
        - detail
        - error_code
        - timestamp
      title: ErrorOut
      type: object
    UnitOfMeasureEnum:
      description: |-
        Unit of a lot's quantity (GS1 / UN/ECE Recommendation 20 code).

        Mirrors ``UnitOfMeasure``. Accepted on a lot's ``unit_of_measure``.
      enum:
        - EA
        - DZN
        - CS
        - PLT
        - GRM
        - KGM
        - LBR
        - OZA
        - MLT
        - LTR
        - GLL
        - FOZ
      title: UnitOfMeasureEnum
      type: string
  securitySchemes:
    APIKeyHeaderAuth:
      type: apiKey
      in: header
      name: X-API-Key
    OAuthTokenAuth:
      type: http
      scheme: bearer
    CookieGatedSessionAuth:
      type: apiKey
      in: cookie
      name: sessionid

````

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