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

> ## Agent Instructions
> Every Lath operation is POST https://platform.trylath.com/<operation name with dots replaced by slashes>, with a JSON body and `Authorization: Bearer <key>`. `email.send` is POST /email/send.
> Branch on `error.code`, never on `error.message`. Every refusal also carries `error.fix`, which names the next step.
> Send an `Idempotency-Key` header on any operation that is not retry-safe, so a retry cannot run it twice.
> A `lath_test_` key emails only the account's own members and sends no SMS; a `lath_live_` key reaches real recipients and is billed.
> The OpenAPI document, generated from the same registry as the routes, is at https://platform.trylath.com/openapi.json.

# audience.preferences.get

> Public, for the hosted preferences page: given the token from a message's unsubscribe link, returns the project name, the contact's masked email and phone, and per channel — email and sms — every topic and whether the contact is subscribed to it. A channel the contact has no address for is still described, so a page can say so rather than imply the channel does not exist.



## OpenAPI

````yaml /api-reference/openapi.json post /audience/preferences/get
openapi: 3.1.0
info:
  title: Lath API
  version: 0.1.0
  description: >-
    Every operation is one POST. The same set is reachable over MCP, the SDK and
    the CLI; nothing is dashboard-only.
servers:
  - url: https://platform.trylath.com
    description: This deployment
security: []
paths:
  /audience/preferences/get:
    post:
      tags:
        - audience
      summary: audience.preferences.get
      description: >-
        Public, for the hosted preferences page: given the token from a
        message's unsubscribe link, returns the project name, the contact's
        masked email and phone, and per channel — email and sms — every topic
        and whether the contact is subscribed to it. A channel the contact has
        no address for is still described, so a page can say so rather than
        imply the channel does not exist.
      operationId: audience.preferences.get
      parameters:
        - name: Idempotency-Key
          in: header
          required: false
          schema:
            type: string
          description: >-
            Replays the stored response for the same key and input; refuses
            different input.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $schema: https://json-schema.org/draft/2020-12/schema
              type: object
              properties:
                token:
                  type: string
                  pattern: ^lath_pt_[0-9A-Za-z]{43}$
                  description: The token from an unsubscribe or preferences link
              required:
                - token
              additionalProperties: false
      responses:
        '200':
          description: '{ activityId, result }. activityId is empty for reads.'
          content:
            application/json:
              schema:
                type: object
                properties:
                  activityId:
                    type: string
                    description: The activity this call created, or empty for a read.
                  result:
                    $schema: https://json-schema.org/draft/2020-12/schema
                    type: object
                    properties:
                      activityId:
                        type: string
                        format: uuid
                        pattern: >-
                          ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                      environmentId:
                        type: string
                        format: uuid
                        pattern: >-
                          ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                      projectName:
                        type: string
                      email:
                        type:
                          - string
                          - 'null'
                      phone:
                        type:
                          - string
                          - 'null'
                      channels:
                        type: object
                        properties:
                          email:
                            type: object
                            properties:
                              topics:
                                type: array
                                items:
                                  type: object
                                  properties:
                                    key:
                                      type: string
                                    name:
                                      type: string
                                    description:
                                      type:
                                        - string
                                        - 'null'
                                    subscribed:
                                      type: boolean
                                  required:
                                    - key
                                    - name
                                    - description
                                    - subscribed
                                  additionalProperties: {}
                              unsubscribedAll:
                                type: boolean
                              suppressionReason:
                                type:
                                  - string
                                  - 'null'
                            required:
                              - topics
                              - unsubscribedAll
                              - suppressionReason
                            additionalProperties: {}
                          sms:
                            type: object
                            properties:
                              topics:
                                type: array
                                items:
                                  type: object
                                  properties:
                                    key:
                                      type: string
                                    name:
                                      type: string
                                    description:
                                      type:
                                        - string
                                        - 'null'
                                    subscribed:
                                      type: boolean
                                  required:
                                    - key
                                    - name
                                    - description
                                    - subscribed
                                  additionalProperties: {}
                              unsubscribedAll:
                                type: boolean
                              suppressionReason:
                                type:
                                  - string
                                  - 'null'
                            required:
                              - topics
                              - unsubscribedAll
                              - suppressionReason
                            additionalProperties: {}
                        required:
                          - email
                          - sms
                        additionalProperties: {}
                    required:
                      - activityId
                      - environmentId
                      - projectName
                      - email
                      - phone
                      - channels
                    additionalProperties: {}
                required:
                  - activityId
                  - result
        '400':
          description: invalid_input or invalid_json
        '401':
          description: unauthenticated
        '403':
          description: forbidden
        '404':
          description: not_found
        '409':
          description: 'conflict: idempotency_mismatch, email_taken, last_key'
        '413':
          description: body_too_large
        '429':
          description: rate_limited
      security: []

````