n8n Quiz Generator: Mistral + Supabase Webhooks Workflow

Generate and Serve a 10-Question Quiz with n8n, Mistral, and Supabase Webhooks

This n8n workflow instantly generates a 10-question multiple-choice quiz using Mistral Cloud and saves it to Supabase. It also exposes a second webhook to fetch a saved quiz by ID—ready for your frontend to display.

What this workflow does

• Creates quizzes via webhook: Sends a POST request to the generate-quiz webhook with topic, difficulty, and number of questions.
• Calls Mistral for strict JSON output: Uses mistral-large-latest (Mistral Cloud) to generate quiz questions as strict JSON based on the provided topic and difficulty.
• Validates generated content: Parses the returned JSON into individual question items and stops with an error response if no questions are produced.
• Stores quiz metadata in Supabase: Normalizes difficulty into a stored label (Easy/Medium/Hard) and creates a quiz record in Supabase.
• Persists full question details: Iterates over each generated question and inserts options, correct_answer, explanation, and the associated quiz ID into the Supabase questions table.
• Returns the result: Responds with JSON confirming success and providing the created Supabase quiz ID.
• Fetches saved quizzes via webhook: The get-quiz webhook accepts a quiz ID, retrieves the quiz and its questions from Supabase, and returns a single JSON payload for your application.

Use cases

• SaaS operators building an “instant practice quiz” feature for any learning topic.
• Automation engineers wiring a quiz-generation backend with n8n webhooks and a Supabase-backed datastore.
• Frontends that need a simple “generate now” + “fetch by ID” API pattern.

Technical details

• n8n webhook endpoints: generate-quiz and get-quiz
• Mistral integration: Mistral Cloud chat model mistral-large-latest
• Supabase storage: quizzes and questions tables (with fields matching workflow inputs and question data)
• Workflow nodes: if, set, code, merge, switch, webhook

Setup note: Add your Mistral Cloud and Supabase credentials, and ensure the required Supabase tables/fields exist before deploying.