Formbricks

Formbricks Client API

Public unauthenticated Client API used by survey front-ends.

Documentation GitHub OpenAPI

Operations 2

POST /v1/client/{environmentId}/displays Create a display #

POST /v1/client/{environmentId}/responses Create a response (Client API) #

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/formbricks:formbricks-client-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Formbricks Client API
  description: REST API for Formbricks, the open-source experience management and survey platform. The Management API (paths under /v1/management and /v2/management) requires a personal API key passed in the x-api-key header and gives full access to surveys, responses, contacts, contact attribute keys, action classes, webhooks, and account info. The Public Client API (/v1/client/{environmentId}) is unauthenticated and is used by survey front-ends to create displays and responses.
  termsOfService: https://formbricks.com/terms
  contact:
    name: Formbricks
    url: https://formbricks.com
  license:
    name: AGPL-3.0
    url: https://github.com/formbricks/formbricks/blob/main/LICENSE
  version: '2.0'
servers:
- url: https://app.formbricks.com/api
  description: Formbricks Cloud
tags:
- name: Client
  description: Public unauthenticated Client API used by survey front-ends.
paths:
  /v1/client/{environmentId}/displays:
    parameters:
    - name: environmentId
      in: path
      required: true
      schema:
        type: string
    post:
      operationId: createDisplay
      tags:
      - Client
      summary: Create a display
      description: Public Client API. Marks a survey as displayed for a contact, optionally linking the display to a later response. No API key required.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
              - surveyId
              properties:
                surveyId:
                  type: string
                userId:
                  type: string
      responses:
        '200':
          description: The created display id.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: object
                    properties:
                      id:
                        type: string
  /v1/client/{environmentId}/responses:
    parameters:
    - name: environmentId
      in: path
      required: true
      schema:
        type: string
    post:
      operationId: createClientResponse
      tags:
      - Client
      summary: Create a response (Client API)
      description: Public Client API used by survey front-ends to submit a response. No API key required.
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/ResponseInput'
      responses:
        '200':
          description: The created response.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    $ref: '#/components/schemas/Response'
components:
  schemas:
    ResponseInput:
      type: object
      required:
      - surveyId
      - data
      properties:
        surveyId:
          type: string
        finished:
          type: boolean
          default: false
        data:
          type: object
          additionalProperties: true
        variables:
          type: object
          additionalProperties: true
        ttc:
          type: object
          additionalProperties:
            type: number
        language:
          type: string
        meta:
          $ref: '#/components/schemas/ResponseMeta'
    ResponseMeta:
      type: object
      properties:
        source:
          type: string
        url:
          type: string
        userAgent:
          type: object
          additionalProperties: true
        country:
          type: string
        action:
          type: string
    Response:
      type: object
      properties:
        id:
          type: string
        createdAt:
          type: string
          format: date-time
        updatedAt:
          type: string
          format: date-time
        surveyId:
          type: string
        displayId:
          type:
          - string
          - 'null'
        singleUseId:
          type:
          - string
          - 'null'
        finished:
          type: boolean
        endingId:
          type:
          - string
          - 'null'
        language:
          type:
          - string
          - 'null'
        data:
          type: object
          additionalProperties: true
          description: Map of questionId to the submitted answer.
        variables:
          type: object
          additionalProperties: true
        ttc:
          type: object
          additionalProperties:
            type: number
          description: Time-to-complete in ms per question.
        meta:
          $ref: '#/components/schemas/ResponseMeta'
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: Personal API key generated in Formbricks under Settings > API Keys.