Resend API (unofficial showcase)

Changelog

API changes across published versions.

v1.5.1

from v1.5.1 · Oct 16, 2026Breaking

This release contains breaking changes. Review carefully before upgrading.

POST/eventschanged1 change
  • BreakingRequest body field `schema` type changed from object,null to object,null
    beforeobjectnullafterobjectnull
PATCH/events/{identifier}changed1 change
  • BreakingRequest body field `schema` type changed from object,null to object,null
    beforeobjectnullafterobjectnull
PATCH/inboxes/{inbox_id}/agentchanged2 changes
  • BreakingRequest body field `instructions` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `tone` type changed from string,null to string,null
    beforestringnullafterstringnull
POST/inboxes/{inbox_id}/draftschanged4 changes
  • BreakingRequest body field `subject` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `html` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `text` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `attachments` type changed from array,null to array,null
    beforearraynullafterarraynull
PATCH/inboxes/{inbox_id}/drafts/{draft_id}changed4 changes
  • BreakingRequest body field `subject` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `html` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `text` type changed from string,null to string,null
    beforestringnullafterstringnull
  • BreakingRequest body field `attachments` type changed from array,null to array,null
    beforearraynullafterarraynull
POST/inboxes/{inbox_id}/drafts/{draft_id}/sendchanged1 change
  • BreakingRequest body field `headers` type changed from object,null to object,null
    beforeobjectnullafterobjectnull
POST/inboxes/{inbox_id}/threads/{thread_id}/emails/{email_id}/forwardchanged2 changes
  • BreakingRequest body field `attachments` type changed from array,null to array,null
    beforearraynullafterarraynull
  • BreakingRequest body field `headers` type changed from object,null to object,null
    beforeobjectnullafterobjectnull
POST/inboxes/{inbox_id}/threads/{thread_id}/emails/{email_id}/replychanged2 changes
  • BreakingRequest body field `attachments` type changed from array,null to array,null
    beforearraynullafterarraynull
  • BreakingRequest body field `headers` type changed from object,null to object,null
    beforeobjectnullafterobjectnull