Loops

Loops Themes API

Create, read and update reusable email themes. 4 operation(s) in the Loops REST API v1 (OpenAPI 1.21.6).

GitHub OpenAPI

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /v1/themes/{themeId} Get an email theme · Get a theme #
Ask an LLM
“How do I see the styles in a particular email theme?”
“What fonts and colors does a given theme set?”
Tell an agent
Show theme {themeId}.
Get the styles of email theme {themeId}.
POST /v1/themes/{themeId} Update an email theme · Update a theme #
Ask an LLM
“If I change a theme's styles, which emails are affected?”
“Are manual style overrides on an email kept when the theme changes?”
Tell an agent
Update the styles of theme {themeId} to {styles}.
Rename theme {themeId} to {name}.
GET /v1/themes List email themes · List themes #
Ask an LLM
“Which email themes has my team created?”
“Can I list themes newest first?”
Tell an agent
List my email themes.
Show themes from cursor {cursor}.
POST /v1/themes Create an email theme · Create a theme #
Ask an LLM
“How do I create a new theme to style my emails?”
“Can I set styles when creating a theme?”
Tell an agent
Create a theme called {name}.
Create email theme {name} with styles {styles}.

Documentation

📖
Documentation
https://loops.so/docs/api-reference/list-themes
📖
APIReference
https://loops.so/docs/api-reference/intro

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/loops/refs/heads/main/openapi/loops-themes-api-openapi.yml

Other Resources

🔗
Overlay
https://raw.githubusercontent.com/api-evangelist/loops/refs/heads/main/overlays/loops-themes-overlay.yaml

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OpenAPI Specification

loops-themes-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Loops OpenAPI Spec Themes API
  description: This is the OpenAPI Spec for the Loops API.
  version: 1.21.6
servers:
- url: https://app.loops.so/api
tags:
- name: Themes
  description: View email themes
paths:
  /v1/themes/{themeId}:
    parameters:
    - name: themeId
      in: path
      required: true
      description: The ID of the theme.
      schema:
        type: string
        examples:
        - clt3u5v7w9x1y3z5a7b9c1d3
    get:
      operationId: getTheme
      tags:
      - Themes
      summary: Get a theme
      description: Retrieve a single theme by ID.
      x-mint:
        href: /api-reference/get-theme
      responses:
        '200':
          description: Successful.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeResponse'
        '400':
          description: Invalid `themeId`.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeFailureResponse'
        '401':
          description: Invalid API key or content API not enabled for this team.
        '404':
          description: Theme not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeFailureResponse'
        '405':
          description: Wrong HTTP request method.
      security:
      - apiKey: []
    post:
      operationId: updateTheme
      tags:
      - Themes
      summary: Update a theme
      description: 'Update a theme''s name and/or styles. When `styles` change, the update cascades to every email using this theme, and `affectedEmailCount` in the response reports how many emails were affected. Manual style edits made on individual emails are preserved: the cascade only changes properties an email has not overridden. A per-email override is removed only when it becomes identical to the theme''s new value, after which that email follows the theme for that property.'
      x-mint:
        href: /api-reference/update-theme
        content: 'When `styles` change, the update cascades to every email using this theme, and `affectedEmailCount` in the response reports how many emails were affected.


          Manual style edits made on individual emails are preserved: the cascade only changes properties an email has not overridden. A per-email override is removed only when it becomes identical to the theme''s new value, after which that email follows the theme for that property.'
        metadata:
          description: Update a theme's name and/or styles. Style changes cascade to every email using the theme.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/UpdateThemeBody'
      responses:
        '200':
          description: Successful.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/UpdateThemeResponse'
        '400':
          description: Invalid `themeId` or request body.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeFailureResponse'
        '401':
          description: Invalid API key or content API not enabled for this team.
        '404':
          description: Theme not found.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeFailureResponse'
        '405':
          description: Wrong HTTP request method.
      security:
      - apiKey: []
  /v1/themes:
    get:
      operationId: listThemes
      tags:
      - Themes
      summary: List themes
      description: Retrieve a paginated list of email themes, most recently created first.
      x-mint:
        href: /api-reference/list-themes
      parameters:
      - name: perPage
        in: query
        required: false
        description: How many results to return in each request. Must be between 10 and 50. Default is 20.
        schema:
          type: string
      - name: cursor
        in: query
        required: false
        description: A cursor to return a specific page of results. Cursors can be found from the `pagination.nextCursor` value in each response.
        schema:
          type: string
      responses:
        '200':
          description: Successful.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ListThemesResponse'
        '400':
          description: Invalid `perPage` value.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeFailureResponse'
        '401':
          description: Invalid API key or content API not enabled for this team.
        '405':
          description: Wrong HTTP request method.
      security:
      - apiKey: []
    post:
      operationId: createTheme
      tags:
      - Themes
      summary: Create a theme
      description: Create a new email theme for use across Loops emails.
      x-mint:
        href: /api-reference/create-theme
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateThemeBody'
      responses:
        '201':
          description: Theme created.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeResponse'
        '400':
          description: Invalid request body.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ThemeFailureResponse'
        '401':
          description: Invalid API key or content API not enabled for this team.
        '405':
          description: Wrong HTTP request method.
      security:
      - apiKey: []
components:
  schemas:
    Theme:
      type: object
      properties:
        id:
          type: string
          description: The ID of the theme.
          examples:
          - clt3u5v7w9x1y3z5a7b9c1d3
        name:
          type: string
          description: The name of the theme.
          examples:
          - Default
        styles:
          $ref: '#/components/schemas/ThemeStyles'
        isDefault:
          type: boolean
          description: Whether this theme is the team's default.
          examples:
          - true
        createdAt:
          type: string
          description: ISO 8601 timestamp for when the theme was created.
          examples:
          - 2025-06-29 07:47:39.370000+00:00
        updatedAt:
          type: string
          description: ISO 8601 timestamp for when the theme was last updated.
          examples:
          - 2025-06-29 07:47:39.370000+00:00
      required:
      - id
      - name
      - styles
      - isDefault
      - createdAt
      - updatedAt
      examples:
      - id: clt3u5v7w9x1y3z5a7b9c1d3
        name: Default
        styles:
          backgroundColor: '#f5f5f5'
          backgroundXPadding: 24
          backgroundYPadding: 24
          bodyColor: '#ffffff'
          bodyXPadding: 24
          bodyYPadding: 24
          bodyFontFamily: Helvetica
          bodyFontCategory: sans-serif
          borderColor: '#e5e5e5'
          borderWidth: 1
          borderRadius: 8
          buttonBodyColor: '#111827'
          buttonBodyXPadding: 16
          buttonBodyYPadding: 12
          buttonBorderColor: '#111827'
          buttonBorderWidth: 0
          buttonBorderRadius: 6
          buttonTextColor: '#ffffff'
          buttonTextFormat: 0
          buttonTextFontSize: 16
          dividerColor: '#e5e5e5'
          dividerBorderWidth: 1
          textBaseColor: '#374151'
          textBaseFontSize: 16
          textBaseLineHeight: 24
          textBaseLetterSpacing: 0
          textLinkColor: '#2563eb'
          heading1Color: '#111827'
          heading1FontSize: 28
          heading1LineHeight: 36
          heading1LetterSpacing: -0.5
          heading2Color: '#111827'
          heading2FontSize: 22
          heading2LineHeight: 30
          heading2LetterSpacing: -0.25
          heading3Color: '#111827'
          heading3FontSize: 18
          heading3LineHeight: 26
          heading3LetterSpacing: 0
        isDefault: true
        createdAt: 2025-06-29 07:47:39.370000+00:00
        updatedAt: 2025-06-29 07:47:39.370000+00:00
    ThemeFailureResponse:
      type: object
      properties:
        message:
          type: string
      required:
      - message
      examples:
      - message: Theme not found.
    ThemeStyles:
      type: object
      description: Flat map of style attributes, matching the attribute names accepted by the LMX `<Style />` tag.
      properties:
        backgroundColor:
          type: string
        backgroundXPadding:
          type: number
        backgroundYPadding:
          type: number
        bodyColor:
          type: string
        bodyXPadding:
          type: number
        bodyYPadding:
          type: number
        bodyFontFamily:
          type: string
        bodyFontCategory:
          type: string
        borderColor:
          type: string
        borderWidth:
          type: number
        borderRadius:
          type: number
        buttonBodyColor:
          type: string
        buttonBodyXPadding:
          type: number
        buttonBodyYPadding:
          type: number
        buttonBorderColor:
          type: string
        buttonBorderWidth:
          type: number
        buttonBorderRadius:
          type: number
        buttonTextColor:
          type: string
        buttonTextFormat:
          type: number
        buttonTextFontSize:
          type: number
        dividerColor:
          type: string
        dividerBorderWidth:
          type: number
        textBaseColor:
          type: string
        textBaseFontSize:
          type: number
        textBaseLineHeight:
          type: number
        textBaseLetterSpacing:
          type: number
        textLinkColor:
          type: string
        heading1Color:
          type: string
        heading1FontSize:
          type: number
        heading1LineHeight:
          type: number
        heading1LetterSpacing:
          type: number
        heading2Color:
          type: string
        heading2FontSize:
          type: number
        heading2LineHeight:
          type: number
        heading2LetterSpacing:
          type: number
        heading3Color:
          type: string
        heading3FontSize:
          type: number
        heading3LineHeight:
          type: number
        heading3LetterSpacing:
          type: number
    Pagination:
      type: object
      properties:
        totalResults:
          type: number
          examples:
          - 2
        returnedResults:
          type: number
          examples:
          - 2
        perPage:
          type: number
          examples:
          - 20
        totalPages:
          type: number
          examples:
          - 1
        nextCursor:
          type:
          - string
          - 'null'
          examples:
          - null
        nextPage:
          type:
          - string
          - 'null'
          examples:
          - null
      required:
      - totalResults
      - returnedResults
      - perPage
      - totalPages
      - nextCursor
      - nextPage
      examples:
      - totalResults: 2
        returnedResults: 2
        perPage: 20
        totalPages: 1
        nextCursor: null
        nextPage: null
    ListThemesResponse:
      type: object
      properties:
        pagination:
          $ref: '#/components/schemas/Pagination'
        data:
          type: array
          items:
            $ref: '#/components/schemas/Theme'
      required:
      - pagination
      - data
      examples:
      - pagination:
          totalResults: 2
          returnedResults: 2
          perPage: 20
          totalPages: 1
          nextCursor: null
          nextPage: null
        data:
        - id: clt3u5v7w9x1y3z5a7b9c1d3
          name: Default
          styles:
            backgroundColor: '#f5f5f5'
            backgroundXPadding: 24
            backgroundYPadding: 24
            bodyColor: '#ffffff'
            bodyXPadding: 24
            bodyYPadding: 24
            bodyFontFamily: Helvetica
            bodyFontCategory: sans-serif
            borderColor: '#e5e5e5'
            borderWidth: 1
            borderRadius: 8
            buttonBodyColor: '#111827'
            buttonBodyXPadding: 16
            buttonBodyYPadding: 12
            buttonBorderColor: '#111827'
            buttonBorderWidth: 0
            buttonBorderRadius: 6
            buttonTextColor: '#ffffff'
            buttonTextFormat: 0
            buttonTextFontSize: 16
            dividerColor: '#e5e5e5'
            dividerBorderWidth: 1
            textBaseColor: '#374151'
            textBaseFontSize: 16
            textBaseLineHeight: 24
            textBaseLetterSpacing: 0
            textLinkColor: '#2563eb'
            heading1Color: '#111827'
            heading1FontSize: 28
            heading1LineHeight: 36
            heading1LetterSpacing: -0.5
            heading2Color: '#111827'
            heading2FontSize: 22
            heading2LineHeight: 30
            heading2LetterSpacing: -0.25
            heading3Color: '#111827'
            heading3FontSize: 18
            heading3LineHeight: 26
            heading3LetterSpacing: 0
          isDefault: true
          createdAt: 2025-06-29 07:47:39.370000+00:00
          updatedAt: 2025-06-29 07:47:39.370000+00:00
    UpdateThemeBody:
      type: object
      description: At least one of `name` or `styles` must be provided.
      properties:
        name:
          type: string
        styles:
          $ref: '#/components/schemas/ThemeStyles'
    CreateThemeBody:
      type: object
      properties:
        name:
          type: string
          description: The theme name.
          examples:
          - Dark mode
        styles:
          description: Style attributes for the theme. Attributes use the same names as the LMX [`<Style />`](/creating-emails/lmx#document-styles) tag attributes.
          $ref: '#/components/schemas/ThemeStyles'
      required:
      - name
      examples:
      - name: Dark mode
        styles:
          backgroundColor: '#111827'
          bodyColor: '#1f2937'
    UpdateThemeResponse:
      allOf:
      - $ref: '#/components/schemas/ThemeResponse'
      - type: object
        properties:
          affectedEmailCount:
            type: number
            description: The number of emails using this theme that are affected by the style change. `0` when only the name changed.
        required:
        - affectedEmailCount
      examples:
      - id: clt3u5v7w9x1y3z5a7b9c1d3
        name: Default
        styles:
          backgroundColor: '#f5f5f5'
          backgroundXPadding: 24
          backgroundYPadding: 24
          bodyColor: '#ffffff'
          bodyXPadding: 24
          bodyYPadding: 24
          bodyFontFamily: Helvetica
          bodyFontCategory: sans-serif
          borderColor: '#e5e5e5'
          borderWidth: 1
          borderRadius: 8
          buttonBodyColor: '#111827'
          buttonBodyXPadding: 16
          buttonBodyYPadding: 12
          buttonBorderColor: '#111827'
          buttonBorderWidth: 0
          buttonBorderRadius: 6
          buttonTextColor: '#ffffff'
          buttonTextFormat: 0
          buttonTextFontSize: 16
          dividerColor: '#e5e5e5'
          dividerBorderWidth: 1
          textBaseColor: '#374151'
          textBaseFontSize: 16
          textBaseLineHeight: 24
          textBaseLetterSpacing: 0
          textLinkColor: '#2563eb'
          heading1Color: '#111827'
          heading1FontSize: 28
          heading1LineHeight: 36
          heading1LetterSpacing: -0.5
          heading2Color: '#111827'
          heading2FontSize: 22
          heading2LineHeight: 30
          heading2LetterSpacing: -0.25
          heading3Color: '#111827'
          heading3FontSize: 18
          heading3LineHeight: 26
          heading3LetterSpacing: 0
        isDefault: true
        createdAt: 2025-06-29 07:47:39.370000+00:00
        updatedAt: 2025-06-29 07:47:39.370000+00:00
        affectedEmailCount: 12
    ThemeResponse:
      type: object
      properties:
        id:
          type: string
          examples:
          - clt3u5v7w9x1y3z5a7b9c1d3
          description: The ID of the theme.
        name:
          type: string
          examples:
          - Default
          description: The name of the theme.
        styles:
          $ref: '#/components/schemas/ThemeStyles'
        isDefault:
          type: boolean
          description: Whether this theme is the team's default.
          examples:
          - true
        createdAt:
          type: string
          description: ISO 8601 timestamp for when the theme was created.
          examples:
          - 2025-06-29 07:47:39.370000+00:00
        updatedAt:
          type: string
          description: ISO 8601 timestamp for when the theme was last updated.
          examples:
          - 2025-06-29 07:47:39.370000+00:00
      required:
      - id
      - name
      - styles
      - isDefault
      - createdAt
      - updatedAt
      examples:
      - id: clt3u5v7w9x1y3z5a7b9c1d3
        name: Default
        styles:
          backgroundColor: '#f5f5f5'
          backgroundXPadding: 24
          backgroundYPadding: 24
          bodyColor: '#ffffff'
          bodyXPadding: 24
          bodyYPadding: 24
          bodyFontFamily: Helvetica
          bodyFontCategory: sans-serif
          borderColor: '#e5e5e5'
          borderWidth: 1
          borderRadius: 8
          buttonBodyColor: '#111827'
          buttonBodyXPadding: 16
          buttonBodyYPadding: 12
          buttonBorderColor: '#111827'
          buttonBorderWidth: 0
          buttonBorderRadius: 6
          buttonTextColor: '#ffffff'
          buttonTextFormat: 0
          buttonTextFontSize: 16
          dividerColor: '#e5e5e5'
          dividerBorderWidth: 1
          textBaseColor: '#374151'
          textBaseFontSize: 16
          textBaseLineHeight: 24
          textBaseLetterSpacing: 0
          textLinkColor: '#2563eb'
          heading1Color: '#111827'
          heading1FontSize: 28
          heading1LineHeight: 36
          heading1LetterSpacing: -0.5
          heading2Color: '#111827'
          heading2FontSize: 22
          heading2LineHeight: 30
          heading2LetterSpacing: -0.25
          heading3Color: '#111827'
          heading3FontSize: 18
          heading3LineHeight: 26
          heading3LetterSpacing: 0
        isDefault: true
        createdAt: 2025-06-29 07:47:39.370000+00:00
        updatedAt: 2025-06-29 07:47:39.370000+00:00
  securitySchemes:
    apiKey:
      type: http
      scheme: bearer