---
title: "Update glossary terms"
description: "Add, change or remove selected glossary terms atomically while leaving every unmentioned term untouched."
canonical: "https://ai-glot.com/docs/api/glossaries/update"
updated: "2026-08-09"
---

# Update glossary terms

Requires `glossaries:write`. Use `upsert` for new or changed pairs and `remove` for source terms to delete.

If the resulting glossary would exceed the plan cap, the entire change is rejected. No partial update is saved and no credits are consumed.