curl -X POST "https://app.emailx.ai/api/v1/workspaces/123/campaigns/email/456/preparation" \
  -H "Authorization: Bearer $EMAILX_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: example-operation-001" \
  --data '{"expected_revision":"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}'

import os, requests

response = requests.post(
    "https://app.emailx.ai/api/v1/workspaces/123/campaigns/email/456/preparation",
    headers={"Authorization": "Bearer " + os.environ["EMAILX_API_KEY"], "Idempotency-Key": "example-operation-001"},
    json={'expected_revision': 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'},
    timeout=30,
)
response.raise_for_status()
print(response.json())

const response = await fetch("https://app.emailx.ai/api/v1/workspaces/123/campaigns/email/456/preparation", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.EMAILX_API_KEY}`, "Content-Type": "application/json", "Idempotency-Key": "example-operation-001" },
  body: JSON.stringify({"expected_revision": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"}),
  signal: AbortSignal.timeout(30000),
});
if (!response.ok) throw new Error(`Emailx: ${response.status}`);
console.log(await response.json());

{
  "data": {
    "id": "op_0123456789abcdef0123456789abcdef",
    "workspace_id": 123,
    "kind": "email.prepare",
    "resource_type": "email_campaign",
    "resource_id": 456,
    "status": "queued",
    "created_at": "2026-11-01T09:00:00Z",
    "updated_at": "2026-11-01T09:00:00Z",
    "completed_at": null,
    "error_code": null,
    "cancellable": true
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "request_id": "<string>",
    "details": {}
  }
}