Create
Enter your name or business name and your email to create a free account in test mode.
Free to start
Start with proof, not a card.
Create your account, save your API key, and let your agent try the whole workflow in test mode. It can try out domains, mailboxes, warmup, campaigns, replies, and failures without sending a real email.
Four deliberate steps
From curious to verified.
Coldrig separates a safe evaluation from a production commitment. The agent can prove the workflow while the owner retains the credential, the spending boundary, and the final activation decision.
Secure
Store your API key, shown only once, in a password manager or secret environment.
Connect
Add Coldrig to Claude, to ChatGPT (on plans that allow custom connectors), or to a coding tool such as Codex, Claude Code, Cursor, or Cline.
Verify
Run simulated setup, campaign, reply, bounce, and timeout paths before deciding.
Owner boundary
Your agent can operate. It cannot invent permission.
Your API key limits what your agent can reach to your own account. Coldrig itself enforces suppression, stop-on-reply, and send limits, so no prompt can switch them off.
- Nothing real is bought in test modeSimulated resources only.
- No trial countdownTest mode is for trying things out, not a production allowance. A free account that never goes live and goes unused for 90 days is removed, though none is removed before January 31, 2027.
- No inbox-placement promiseInfrastructure reduces avoidable risk; it cannot guarantee delivery.
- Going live is separateCurrent planning price: $49 a month covers your first 3 mailboxes, and each extra mailbox is $5 a month (3-mailbox minimum).