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[ARTICLE · art-73579] src=dev.to ↗ pub= topic=developer-tools verified=true sentiment=· neutral

Wanted Claude to read my OneNote notebooks. Grabbed an MCP server, hit a silent 401 on every call.

A developer rewrote a OneNote MCP server in TypeScript after encountering a silent 401 error on every API call. The debugging revealed scope pitfalls and silent token renewal issues in Microsoft Graph authentication.

read1 min views1 publishedJul 25, 2026

I Rewrote a OneNote MCP Server in TypeScript — Here's What I Learned About Microsoft Graph Auth Scope pitfalls and silent token renewal Amandeep Singh Amandeep Singh Amandeep Singh Follow Jul 19 I Rewrote a OneNote MCP Server in TypeScript — Here's What I Learned About Microsoft Graph Auth

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mcp

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typescript

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tutorial

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ai 12 reactions 6 comments 6 min read

source & further reading
dev.to — original article Why My Deploy Key Lives in a Password Manager, Not on Disk I vibe coded an LM Arena for AI companion apps with Claude Code. Before You Train the Model: What My First ML Project Taught Me About Data Cleaning
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