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Quickstart Dashboard tour SDKs and OpenAPI AI tools Recipes Migrating to ZapSMTP

Sending

Sending email Domains & DNS setup Templates and variables Email template editor SMTP relay

Events & data

Webhook events Click actions Tracking and analytics Receiving email

Operations

Deliverability guide Testing & simulator Errors, limits & paging Teams & client accounts

API reference

Emails

Send an email Send a batch List emails Retrieve an email Retrieve email content Reschedule an email Cancel a scheduled email Spam-check a draft Spam-check a sent email List attachments Retrieve an attachment Share an email

Domains Webhooks Click actions Templates Variables Modules, images & timers Received emails Inbound setup Suppressions Statistics Keys & SMTP credentials Logs & usage Simulator & IPs

OpenAPI 3.1 spec llms.txt

Test API keyRuns examples for real against your account. Test keys only; kept in this tab, never stored on our side. Get a key

ZapSMTP / Docs / API reference

Emails

Send one email or up to 100 in a batch, schedule them, and follow every recipient from acceptance to the remote server’s reply. Sending to …@simulator.zapsmtp.xyz with a test key runs the whole pipeline without delivering anything.

POSTSend an email/v1/emailsSend an email (or schedule it with scheduled_at)..POSTSend a batch/v1/emails/batchSend 1-100 emails in one request..GETList emails/v1/emailsList sent emails, newest first..GETRetrieve an email/v1/emails/{id}Retrieve one email with per-recipient status and its event timeline..GETRetrieve email content/v1/emails/{id}/contentRetrieve the archived content of a sent email..PATCHReschedule an email/v1/emails/{id}Reschedule a scheduled email..POSTCancel a scheduled email/v1/emails/{id}/cancelCancel a scheduled email before it is dispatched..POSTSpam-check a draft/v1/emails/spam-checkScore a draft for spam before sending (nothing is sent or stored)..POSTSpam-check a sent email/v1/emails/{id}/spam-checkScore an already sent email (live or test) from the content archive..GETList attachments/v1/emails/{id}/attachmentsAttachments of a sent email, each with a download link valid for one hour..GETRetrieve an attachment/v1/emails/{id}/attachments/{aid}One attachment of a sent email with a fresh download link..POSTShare an email/v1/emails/{id}/shareCreate a link anyone can open to view a sent email — for a colleague or support.