Migrate from Resend - Gork

Resend covers outbound-only sending. Gork adds agent-native inboxes, inbound mail, threading, and MCP tools on top of a /v1 REST API. Migration is a clean swap in three passes.

1. Map the API calls

Resend	Gork	Notes
`POST /emails` (api.resend.com)	`POST /v1/messages/send` (api.gork.email)	Same shape: `from` becomes `inboxId`, `to/subject/html/text` carry over, `reply_to` becomes `inReplyTo`
`POST /emails/batch`	Loop `messages/send` with `Idempotency-Key` per recipient	Gork caps 50 recipients per request; sandbox is single-recipient
`GET /emails/{id}`	`GET /v1/messages/{id}`	Full body + attachments metadata
Domains endpoints	`POST /v1/domains` → add DNS → `POST /v1/domains/{id}/verify`	See Custom domains
Webhooks	`POST /v1/webhooks`	Event names differ — see next section
API keys (`re_...`)	`POST /v1/keys` (`gork_live_...`)	Rotate: create Gork key, deploy, revoke Resend key

The SDK swap is one import:

// Before (Resend)
import { Resend } from "resend";
const resend = new Resend(process.env.RESEND_API_KEY);
await resend.emails.send({ from: "agent@domain.com", to, subject, html });

// After (Gork)
import { Gork } from "@gork/sdk";
const gork = new Gork({ apiKey: process.env.GORK_API_KEY });
await gork.messages.send({ inboxId: "inb_...", to, subject, html });

# After (Gork, Python)
from gork import Gork
gork = Gork()
gork.send_message(inbox_id="inb_...", to=[...], subject=..., html=...)

2. Remap webhooks

Resend event	Gork event
`email.sent`	`email.sent`
`email.delivered`	(covered by `email.sent` — accepted by upstream)
`email.bounced`	`email.bounced`
`email.complained`	`email.complained`
`email.opened` / `clicked`	Opt-in `trackOpens` pixel (no click tracking)

Gork signs every delivery (X-Gork-Signature, HMAC-SHA256) — verify with verifyGorkWebhook instead of Resend’s Svix verifier. See Verify webhook requests. Retry policy: 5 attempts over 30s → 1h, 4xx terminal. See Retries.

3. Move suppressions and domains

Export bounces/complaints/unsubscribes from Resend and replay them into POST /v1/suppressions ({email, reason}) so day-one sends respect prior opt-outs. See Suppressions.
Add the domain in Gork, install the DNS records alongside Resend’s (both can coexist), verify, then cut traffic over gradually — keep both sending paths live during the transition and compare delivery in Email activity.
Update SPF to include both providers during migration (include:amazonses.com), then remove the old one.

Gork has no bulk-campaign objects (Resend Audiences/Broadcasts map to per-recipient messages/send calls). If you send newsletters, budget the per-request loop and watch Rate limits: 240 req/min per workspace.