Answer Document Questions via Webhooks with Anthropic Claude

Ask questions about your own documents—instantly—using an n8n webhook and Anthropic Claude

This workflow exposes a production-ready POST webhook that lets you send a question and receive a grounded, cited answer as JSON. It works by chunking your pasted documents, selecting the most relevant excerpts, and having Anthropic Claude answer strictly from the provided text.

What this workflow does

• Receives a webhook request (POST) containing JSON with a question.
• Loads & chunks your documents from the workflow’s DOCS array, splitting content into sections by ## headings.
• Retrieves relevant excerpts by scoring all sections using keyword overlap with the question, keeping the top-matching excerpts.
• Calls Anthropic Claude via the Anthropic Messages API, sending the question plus the retrieved text and instructing Claude to answer only from the provided excerpts and cite each claim.
• Responds to the webhook caller with { "answer": ..., "sources": ... }, including the selected section names as sources.

Use cases

• Document Q&A for internal teams: ask policy, procedure, or documentation questions and get cited answers.
• SaaS operator support: route customer-facing documentation questions to a webhook-driven answer flow.
• Automation engineering: embed “ask-your-docs” behavior into other apps by posting { "question": "..." }.
• Reduce hallucinations: require Claude to rely only on excerpts selected from your provided documents.

Technical details

• Nodes/steps used: code (chunking/scoring), webhook, sticky note, http request, respond to webhook.
• Anthropic integration: configure HTTP Header Auth with x-api-key, and send anthropic-version: 2023-06-01.
• Webhook endpoint: use the production webhook URL for /ask-your-docs and POST a JSON body like { "question": "..." }.

Setup note: paste your documents into the workflow’s DOCS array and use ## headings to create citeable sections.