Welcome
Instant, Cambridge-aligned feedback on your students' or your own writing — scores, error tags, corrections and printable reports, for B2, C1 and C2.
The marking is powered by Claude AI. You connect it with your personal key, so you're always in control and your writing goes straight to Anthropic — never through anyone else.
Create a free account at console.anthropic.com, add a little credit, then open API Keys and create one. It starts with sk-ant-. Marking one piece costs a fraction of a cent.
Your key is saved only in this browser, on this device. You can clear it anytime.
Your key is stored locally in your browser and sent only to Anthropic's servers to produce feedback. It is never sent anywhere else. Usage is billed to your own Anthropic account. This tool gives AI-assisted feedback aligned with Cambridge English Qualifications criteria; it is not affiliated with or endorsed by Cambridge, and scores are a guide, not official results.
