Tag

Node.js

2 articles tagged Node.js.

A white envelope with a blue wax seal showing a key, beside a blue shield with a coral check mark

Sep 26, 2026 7 min

How we sign webhooks, and why we refuse redirects

An outgoing webhook lets anyone point our server at any URL. Here is how Butters signs JSON deliveries so your receiver can trust them, how to verify one in Node or Python, and why the delivery code refuses private addresses and never follows a redirect.

Node.js Security

A column of white event cards with one coral card marked by a flame, under a yellow magnifying glass

Sep 23, 2026 5 min

Errors are events too

Before you need a dedicated error tracker, you need to know something broke. Here is how to send every unhandled error to Butters with one small function, what goes in tags versus metadata, and where this approach stops being enough.

API Express