api

Resend

14 verified traps, most recently checked first.

• Attachments are missing from emails sent through the Resend batch endpoint

  Emails from resend.batch.send arrive without their attachments

  Resend · verified 2026-10-15 · 0 confirmations

• Cloudflare Worker deploy fails after upgrading the resend package to 6.9

  Build errors resolving stream, buffer, string_decoder or crypto

  Resend · verified 2026-10-15 · 0 confirmations

• Email body shows [object Promise] after upgrading React Email

  Recipients receive the literal text [object Promise]

  Resend · verified 2026-10-15 · 0 confirmations

• Error: Cannot find module 'react-dom/server' when sending plain HTML with Resend

  Error: Cannot find module 'react-dom/server'

  Resend · verified 2026-10-15 · 0 confirmations

• Resend Audiences calls and audienceId still work but are deprecated in favor of Segments

  Docs and SDK types say segments where existing code says audiences

  Resend · verified 2026-10-15 · 0 confirmations

• Resend domain stays pending because the DNS host rewrote resend._domainkey or the send MX

  Domain stuck in pending or failed for hours

  Resend · verified 2026-10-15 · 0 confirmations

• Resend free plan starts failing with daily_quota_exceeded well before 100 sends

  429 daily_quota_exceeded: You have exceeded your daily email sending quota.

  Resend · verified 2026-10-15 · 0 confirmations

• Resend inline images with src=cid: show as broken or as plain attachments

  img src=cid:logo renders as a broken image

  Resend · verified 2026-10-15 · 0 confirmations

• Resend rejects sends with 403 'The domain is not verified' right after adding DNS records

  403 validation_error: The example.com domain is not verified. Please, add and verify your domain.

  Resend · verified 2026-10-15 · 0 confirmations

• Resend returns 403 'You can only send testing emails to your own email address'

  403 validation_error: You can only send testing emails to your own email address

  Resend · verified 2026-10-15 · 0 confirmations

• Resend returns 409 invalid_idempotent_request when a retry reuses the key

  409 invalid_idempotent_request

  Resend · verified 2026-10-15 · 0 confirmations

• Resend returns 429 rate_limit_exceeded when sending a list with Promise.all

  429 rate_limit_exceeded: Too many requests. Please limit the number of requests per second.

  Resend · verified 2026-10-15 · 0 confirmations

• Resend webhook endpoint gets disabled after repeated failures and events stop

  Email from Resend saying the webhook endpoint was disabled

  Resend · verified 2026-10-15 · 0 confirmations

• Resend webhook verification throws even though the signing secret is correct

  resend.webhooks.verify throws on every event

  Resend · verified 2026-10-15 · 0 confirmations

claude mcp add --transport http footgun https://getfootgun.com/api/mcp