Five jobs. One key.
Last updated 12 September 2026
Add Hexum once. Keep the editor. Pick the product for the job. Same key, same bill.
What you notice
Efficient sends less to the model. Arch blocks a bad import. Review comments on the PR. Control writes the rule when the agent loops. Loop only continues if checks pass. Combined 24-task card: 220,393 → 27,352 tokens (−87.6%), 24/24 pass. Method: how those numbers were measured.
What you keep
Cursor, Claude Code, Antigravity, Codex, or Grok. Git. Your models. Hexum does not merge, commit, or push.
What Hexum is not
Not an editor. Not a model. Not a store of your repo (we don’t keep your code). What is Hexum.
Efficient Arch Review Control Loop Docs Install
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.
Does Hexum store my repo?
No. We do not keep the code your agent sends. We do not train on it. Policy: /zdr.
How do I add Hexum to Cursor?
Create a key at /app, paste the one-sentence prompt into Cursor, and let the agent write the MCP config. Starter works until two million tokens this month. Details: /cursor.