Free tools, built for operators.

Browser extensions for Amazon sellers and an open-source MCP server for engineers. Each one came out of solving a real operational problem.

Featured Open Source

gmail-mcp-oauth: Multi-tenant Gmail MCP server with OAuth hardening

Production-grade Gmail MCP server

A drop-in MCP server that wraps the Gmail API for any MCP-compatible client. Multi-tenant by design, with encrypted refresh tokens and a closed-by-default authorization model. Production-grade, not a weekend demo.

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Chrome Extension Amazon Cookie Cleaner: Fix the 400 Bad Request Error Fix Amazon's 400 cookie error One-click cleanup of bloated Amazon tracking cookies. Keeps you logged in. Chrome Extension Listing Snapshot: Extract Any Amazon Listing in One Click Pull any Amazon listing in one click ASIN, title, bullets, images, price. Copy as text, JSON, or CSV. Chrome Extension Seller Central Quick-Switch: Press Ctrl+K, Jump Anywhere Ctrl+K to jump anywhere in Seller Central Command palette for Seller Central and Ad Console. Fuzzy search, recents on top. Chrome Extension Seller Central Tab Title Marker: Tell Your Accounts Apart in Every Tab Label every Seller Central tab by store Stamps the active store name into every browser tab so accounts stop blurring together.

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