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Getting started

Introduction Quickstart Authentication Domains and DNS

API reference

Send an email POST Get one email with its events GET List emails newest first GET Send up to 100 emails POST Rename an active API key PATCH Stream changes for the selected dashboard tenant GET Get the signed-in user and memberships GET Create an organization with the caller as owner POST Export the selected organization GET Schedule organization deletion DELETE Restore an organization during the deletion window POST List members of the selected organization GET Invite a teammate POST List pending invitations GET Revoke a pending invitation DELETE Preview an invitation GET Join an invited organization POST Remove an organization member DELETE Change an organization member's role PATCH Create an API key POST List active API keys, newest first GET Get an active API key GET Revoke an API key DELETE Current tenant send usage GET Dependency readiness check GET Liveness check GET Add a sending domain POST List domains GET Get one domain GET Delete a domain DELETE Check the DNS records now POST Add a webhook endpoint POST List webhooks GET Get a webhook without its signing secret GET Delete a webhook DELETE Rotate a webhook signing secret POST List retained webhook deliveries, newest first GET Get a delivery, its payload and ordered attempts GET Resend a succeeded or failed delivery, preserving its attempt history POST Add a recipient to this account's suppression list POST List suppressed recipients GET Get one suppression for this account GET Remove a recipient from this account's suppression list DELETE

Concepts

Sending Webhooks Errors Rate limits Suppressions Data retention Migrate from Resend Migrate from Postmark to Sendtier

Error codes

invalid_request unauthorized forbidden not_found idempotency_conflict already_exists domain_not_verified recipient_suppressed organization_limit_reached rate_limited not_implemented internal_error

Error codes

already_exists

HTTP status: 409

What happened

A resource with the same unique value already exists, for example a domain with the same name.

How to fix

Use the existing resource. List resources to find its ID, or delete it first.

Source: docs/errors/already_exists.md.

idempotency_conflict

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domain_not_verified

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What happened How to fix