curl --request POST \
  --url https://api.turnkey.com/public/v1/submit/sign_transaction \
  --header 'Accept: application/json' \
  --header 'Content-Type: application/json' \
  --header "X-Stamp: <string> (see Authorizations)" \
  --data '{
    "type": "ACTIVITY_TYPE_SIGN_TRANSACTION_V2",
    "timestampMs": "<string> (e.g. 1746736509954)",
    "organizationId": "<string> (Your Organization ID)",
    "parameters": {
        "signWith": "<string>",
        "unsignedTransaction": "<string>",
        "type": "<TRANSACTION_TYPE_ETHEREUM>",
        "externalSignerPubkey": "<string>"
    }
}'

import { Turnkey } from "@turnkey/sdk-server";

const turnkeyClient = new Turnkey({
  apiBaseUrl: "https://api.turnkey.com",
  apiPublicKey: process.env.API_PUBLIC_KEY!,
  apiPrivateKey: process.env.API_PRIVATE_KEY!,
  defaultOrganizationId: process.env.ORGANIZATION_ID!,
});

const response = await turnkeyClient.apiClient().signTransaction({
  signWith: "<string> (A Wallet account address, Private Key address, or Private Key identifier.)",
  unsignedTransaction: "<string> (Raw unsigned transaction to be signed)",
  type: "<TRANSACTION_TYPE_ETHEREUM>" // type field,
  externalSignerPubkey: "<string> (The public key of the external signer to use for signing this transaction. Only needed for external signer requests.)"
});

{
  "activity": {
    "id": "<activity-id>",
    "status": "ACTIVITY_STATUS_COMPLETED",
    "type": "ACTIVITY_TYPE_SIGN_TRANSACTION_V2",
    "organizationId": "<organization-id>",
    "timestampMs": "<timestamp> (e.g. 1746736509954)",
    "result": {
      "activity": {
        "id": "<string>",
        "organizationId": "<string>",
        "status": "<string>",
        "type": "<string>",
        "intent": {
          "signTransactionIntentV2": {
            "signWith": "<string>",
            "unsignedTransaction": "<string>",
            "type": "<TRANSACTION_TYPE_ETHEREUM>",
            "externalSignerPubkey": "<string>"
          }
        },
        "result": {
          "signTransactionResult": {
            "signedTransaction": "<string>"
          }
        },
        "votes": "<array>",
        "fingerprint": "<string>",
        "canApprove": "<boolean>",
        "canReject": "<boolean>",
        "createdAt": "<string>",
        "updatedAt": "<string>"
      }
    }
  }
}