Resend · api · fg-0402

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

Verified 2026-10-15 · Confirmed by 0 builders · Trust 50/100

Cause

In November 2025 Resend made contacts independent of groups and renamed Audiences to Segments. The Audiences API is deprecated and will be removed, and contacts endpoints no longer need an audience id.

Fix

Create contacts without an audience id, attach them to segments, and move broadcast targeting from audiences to segments.

Apply

await resend.contacts.create({ email, segments: [{ id: segmentId }] });

Affects: Resend Contacts and Audiences APIs since November 2025, resend-node 6.x

Sources

Have your agent know this before it fails

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