---
title: "Submit Answer"
method: POST
path: "/questionnaires/{session_id}/answer"
tags: ["questionnaires"]
---

# Submit Answer

`POST /questionnaires/{session_id}/answer`

## Request

- Base URL: `https://api.threadchain.pro` (the document declares no server; this is the origin it was published from)
- URL: `https://api.threadchain.pro/questionnaires/{session_id}/answer`
- Auth: OAuth 2
  - Password
  - Token URL: `auth/token`

Submit an answer to a question

Supports file uploads for questions with input_type='file_upload'.
Files are uploaded to Backblaze B2 and URLs are stored in the database.

## Path parameters

- `session_id` string, uuid, required

## Query parameters

- `locale` string, nullable

## Request body `multipart/form-data`

- BodySubmitAnswerQuestionnairesSessionIdAnswerPost
  - `question_id` string, required
  - `answer` string, nullable
  - `files` string[]

## Response `200`

Successful Response

- SubmitAnswerResponse
  - `success` boolean, required
  - `message` string, nullable
  - `next_question` QuestionTemplateSchema
    - `product_type` 'jewelry' | 'clothes', required
    - `phase` string, required
    - `question_text` string, required
    - `input_type` 'text' | 'yes_no' | 'multiple_choice' | 'file_upload' | 'number' | 'textarea' | 'checkbox', required
    - `options` union[], nullable
      - union
        - string
        - QuestionOption
          - `label` string, required
          - `image_url` string, nullable
          - `description` string, nullable
    - `validation_rules` object, nullable
    - `order` integer, required
    - `depends_on_question_id` string, uuid, nullable
    - `depends_on_answer` string, nullable
    - `placeholder` string, nullable
    - `help_text` string, nullable
    - `help_display` 'link' | 'inline'
    - `id` string, uuid, required
    - `created_at` string, date-time, required
  - `next_phase` string, nullable
  - `is_complete` boolean, required
  - `progress` object, required
  - `file_urls` string[], nullable
  - `conversation_title` string, nullable

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/threadchain/apis/threadchain-backend.md) - [All operations](https://skmtc.dev/threadchain/apis/threadchain-backend/llms.txt) - [OpenAPI document](https://skmtc.dev/threadchain/apis/threadchain-backend/revisions/8ee288a7e6bd?raw)