> ## 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.

# Create a trait preference

> Record the caller's stance on one trait. ``404`` if no trait has that slug; ``409`` if the caller already holds a preference on it (update that one instead); ``422`` for a non-``AVOID`` stance on a ``SENSITIVITY`` trait.



## OpenAPI

````yaml /openapi/openapi-account.json post /account/api/v1/preferences
openapi: 3.1.0
info:
  title: Account API
  version: 1.0.0
  description: >
    Authenticate and manage users, organizations, and API keys.


    ## 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: Account
    description: Authenticate and introspect the current user and API key.
  - name: Organizations
    description: Create and manage organizations (businesses).
  - name: Members
    description: Invite, update, and remove organization members.
  - name: API Keys
    description: Create, list, and revoke API keys.
  - name: Preferences
    description: >-
      Create, list, update, and delete the authenticated user's stored trait
      preferences (allergens, dietary stances, certifications, sensitivities).
  - name: Scan History
    description: >-
      Read the current visitor's scan history (authenticated or
      anonymous/session-based) and capture anonymous resolver scans.
  - name: Enrollment Codes
    description: >-
      Mint, list, view, and revoke single-use manual enrollment codes for
      linking a retailer to your account (C-4793).
  - name: Retailer Links
    description: >-
      List, view, unlink, and delete purchase history for the retailers linked
      to your account (C-4794).
externalDocs:
  description: Closient Documentation
  url: https://docs.closient.com
paths:
  /account/api/v1/preferences:
    post:
      tags:
        - Preferences
      summary: Create a trait preference
      description: >-
        Record the caller's stance on one trait. ``404`` if no trait has that
        slug; ``409`` if the caller already holds a preference on it (update
        that one instead); ``422`` for a non-``AVOID`` stance on a
        ``SENSITIVITY`` trait.
      operationId: apps_accounts_api_preferences_create_preference
      parameters: []
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/TraitPreferenceCreate'
        required: true
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TraitPreferenceOut'
        '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'
        '409':
          description: Conflict
          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:
                $ref: '#/components/schemas/ErrorOut'
      security:
        - APIKeyHeaderAuth: []
        - OAuthTokenAuth: []
        - CookieGatedSessionAuth: []
components:
  schemas:
    TraitPreferenceCreate:
      examples:
        - stance: AVOID
          trait_slug: peanuts
      properties:
        trait_slug:
          description: >-
            ``Trait.slug`` of the trait to record a stance on (as returned in
            ``trait_slug``).
          maxLength: 64
          minLength: 1
          pattern: ^[^\x00]{1,64}$
          title: Trait Slug
          type: string
        stance:
          $ref: '#/components/schemas/TraitStanceEnum'
          description: >-
            How the caller feels about the trait. ``SENSITIVITY`` traits accept
            only ``AVOID``.
      required:
        - trait_slug
        - stance
      title: TraitPreferenceCreate
      type: object
    TraitPreferenceOut:
      description: |-
        A single stored preference row.

        Returned by ``GET /account/api/v1/preferences``. The ``trait`` slug is
        lower-snake-case (``"tree_nuts"``, ``"vegan"``) so it can be passed
        directly into search constraints; the human-readable form is in
        ``trait_label``.
      examples:
        - category: ALLERGEN
          id: d5e6f7a8-9012-3456-abcd-ef7890123456
          stance: AVOID
          trait: peanuts
          trait_label: Peanuts
          trait_slug: peanuts
        - category: DIETARY
          id: a1b2c3d4-5678-9012-abcd-ef1234567890
          stance: REQUIRE
          trait: vegan
          trait_label: Vegan
          trait_slug: vegan
        - category: SOURCING
          id: b2c3d4e5-6789-0123-bcde-f12345678901
          stance: PREFER
          trait: organic
          trait_label: Organic
          trait_slug: organic
      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
        trait:
          description: >-
            Lower-snake-case slug for the trait — pass directly into search
            constraints like ``exclude_allergens`` / ``require_certifications``
            depending on the ``category``.
          title: Trait
          type: string
        trait_slug:
          description: >-
            The trait's stable kebab-case identifier (``Trait.slug``) — the
            value ``POST /preferences`` takes to name a trait.
          title: Trait Slug
          type: string
        trait_label:
          description: Human-readable trait name as stored on ``Trait.name``.
          title: Trait Label
          type: string
        category:
          $ref: '#/components/schemas/TraitCategoryEnum'
          description: >-
            Which axis the trait sits on. ``ALLERGEN`` preferences feed
            ``exclude_allergens``; ``DIETARY`` / ``RELIGIOUS`` / ``SOURCING``
            feed ``require_certifications``.
        stance:
          $ref: '#/components/schemas/TraitStanceEnum'
          description: >-
            How the user feels about the trait. ``AVOID`` / ``REQUIRE`` are hard
            filters; ``PREFER`` is a ranking boost; ``NEUTRAL`` is recorded but
            not acted on.
      required:
        - id
        - trait
        - trait_slug
        - trait_label
        - category
        - stance
      title: TraitPreferenceOut
      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
    TraitStanceEnum:
      description: |-
        Mirror of ``preferences.TraitPreference.Stance``.

        ``AVOID`` and ``REQUIRE`` are hard filters; ``PREFER`` is a ranking
        boost; ``NEUTRAL`` is a recorded-but-don't-act stance (useful when a
        user has dismissed a UI prompt but hasn't expressed a preference).
      enum:
        - AVOID
        - REQUIRE
        - PREFER
        - NEUTRAL
      title: TraitStanceEnum
      type: string
    TraitCategoryEnum:
      description: |-
        Mirror of ``preferences.Trait.Category``.

        Categories partition the trait space into allergen / dietary /
        religious / sourcing concerns. Agents key off this to know which
        filter slot a preference should drive at search time (an
        ``ALLERGEN`` preference flows into ``exclude_allergens``; a
        ``DIETARY`` or ``SOURCING`` preference flows into
        ``require_certifications``).
      enum:
        - ALLERGEN
        - DIETARY
        - RELIGIOUS
        - SOURCING
        - SENSITIVITY
        - OTHER
      title: TraitCategoryEnum
      type: string
  securitySchemes:
    APIKeyHeaderAuth:
      type: apiKey
      in: header
      name: X-API-Key
    OAuthTokenAuth:
      type: http
      scheme: bearer
    CookieGatedSessionAuth:
      type: apiKey
      in: cookie
      name: sessionid

````