Dead Simple Email

Dead Simple Email gives an agent a real, deliverable email identity — not a sandbox — and it can get one entirely on its own. A single call to deadsimple.signup returns an account, an API key and a live inbox. No dashboard, no verification email, no human in the loop.

The method agents reach for most is deadsimple.get_verification_code. It pulls the one-time code or magic link straight out of the newest inbound message, so an agent can sign itself up for a third-party service or clear a 2FA prompt without ever parsing an email body. Filter by sender and by timestamp so a stale code is never returned. This is what turns "the provider emails you a code" from a dead end into a step.

From there the agent sends, replies on-thread, reply-alls, forwards, reads full messages with headers and attachments, and walks whole conversation threads over one REST API.

Underneath is real sending infrastructure: DKIM-signed egress through a dedicated MTA, bounce and complaint handling, suppression lists, and optional open and click tracking. Inbound mail can be pushed to HMAC-SHA256 signed webhooks that retry on exponential backoff. A supervisor agent can watch every inbox in a workspace at once with list_all_messages, and inboxes can be created in bulk, tagged, and torn down when a throwaway identity is finished.

Tiers. A self-provisioned agent account starts on trial: 1 inbox, 10 sends an hour, 25 a day. Calling deadsimple.claim with an email a human controls, then deadsimple.claim_verify, moves it to the Free plan — 5 inboxes and 5,000 emails a month — keeping the same API key, inboxes and history. Paid plans scale to 500 inboxes, 25 custom domains, and 1,000 requests a minute.

Edge cases. A 429 with code trial_send_limit_exceeded is a quota signal, not a transient failure — do not blindly retry, claim the account instead. Pagination is cursor-based. Spam is excluded from list_messages unless include_spam is true. Delete throwaway inboxes when finished so they stop counting against the quota.