Hexum glossary
Last updated 12 September 2026
Hexum
The layer next to the coding agent. Keep the editor. Not a model.
API key
Created in the dashboard. Shown once. Paste it into Cursor or Claude Code.
Efficient
Don’t paste the whole repo. Efficient.
Arch
Block a bad import. Does not call a model. Arch.
Rules file
Usually architecture.hexum. Folders and “cannot import” rules. Guide.
What you pay
What the agent sent Hexum. €0.30/M Usage, €0.35/M Teams.
Tokens saved
How much smaller the reply was. Dashboard only — not the invoice.
AUTH
Missing, wrong, or revoked key.
BILLING
Starter used, or that key’s plan is off.
We don’t keep your code
No stored prompts or files. Policy.
FAQ
What is Hexum?
Hexum is a developer ecosystem for coding agents in Cursor, Claude Code, and the rest. One API key. Five products and twelve tools today: spend less on each prompt, block bad imports, review pull requests, stop the agent looping, and only keep building when checks pass. We do not keep your code.
Does Hexum replace Cursor or Claude Code?
No. You keep Cursor, Claude Code, Antigravity, Codex, or Grok. Hexum is not an editor and not a model. You paste a key into the agent you already use.
How does Hexum cut what I pay the model?
Your agent stops dumping the whole repo into the prompt. Hexum sends this task, not every file. On the published card, MBPP context dropped 85.2% and the combined 24-task cut is 87.6%, with 24/24 tests still passing. Tokens are ceil(utf8_bytes/4), not a provider invoice. See /benchmarks.
Does the architecture check use an AI?
No. It reads a rules file in your repo and reports forbidden imports. It does not call a model, so it does not guess.
How is Hexum billed?
You pay for what your agent sent Hexum. Usage €0.30 per million tokens. Teams €0.35 per million. No per-person fee. No monthly cap. See /pricing.
What does the dashboard mean by tokens saved?
How much smaller the reply was than what the agent sent, when that is a cut. Your invoice is still based on what the agent sent Hexum, not on the savings.