diff --git a/sdks/python/pmxt/_exchanges.py b/sdks/python/pmxt/_exchanges.py
index 2b1249c6..088863b8 100644
--- a/sdks/python/pmxt/_exchanges.py
+++ b/sdks/python/pmxt/_exchanges.py
@@ -593,6 +593,7 @@ def __init__(
         auto_start_server: Optional[bool] = None,
         pmxt_api_key: Optional[str] = None,
         wallet_address: Optional[str] = None,
+        api_base_url: Optional[str] = None,
         signer: Optional[object] = None,
         websocket: Optional[dict] = None,
     ) -> None:
@@ -604,6 +605,10 @@ def __init__(
             auto_start_server: Automatically start server if not running (default: True)
             pmxt_api_key: Hosted PMXT API key (optional; enables hosted mode)
             wallet_address: Wallet address for hosted reads/writes (optional)
+            api_base_url: Base URL of the SuiBets exchange API itself (not the
+                sidecar — that is ``base_url``). Forwarded to the sidecar as the
+                ``baseUrl`` credential; falls back to the SUIBETS_BASE_URL env
+                var on the sidecar side when unset (optional)
             signer: Custom signer for hosted writes (optional)
             websocket: WebSocket transport configuration dict (optional)
         """
@@ -616,11 +621,14 @@ def __init__(
             signer=signer,
             websocket=websocket,
         )
+        self.api_base_url = api_base_url
 
     def _get_credentials_dict(self) -> Optional[Dict[str, Any]]:
         creds = super()._get_credentials_dict() or {}
         if self.wallet_address:
             creds["walletAddress"] = self.wallet_address
+        if self.api_base_url:
+            creds["baseUrl"] = self.api_base_url
         return creds if creds else None
 
 
diff --git a/sdks/python/pmxt/models.py b/sdks/python/pmxt/models.py
index 96ad499c..9954e9b4 100644
--- a/sdks/python/pmxt/models.py
+++ b/sdks/python/pmxt/models.py
@@ -671,6 +671,7 @@ class PolymarketOptions(ExchangeOptions, total=False):
 class SuiBetsOptions(ExchangeOptions, total=False):
     """Constructor options for SuiBets clients."""
     wallet_address: str
+    api_base_url: str
 
 
 class RouterOptions(TypedDict, total=False):
diff --git a/sdks/python/tests/test_hosted_dispatch.py b/sdks/python/tests/test_hosted_dispatch.py
index 85f9315a..7d0a0b4f 100644
--- a/sdks/python/tests/test_hosted_dispatch.py
+++ b/sdks/python/tests/test_hosted_dispatch.py
@@ -179,6 +179,25 @@ def test_suibets_constructor_accepts_wallet_address_for_hosted_mode() -> None:
     assert api._get_credentials_dict() == {"walletAddress": WALLET_ADDRESS}
 
 
+def test_suibets_constructor_forwards_api_base_url_credential() -> None:
+    api = SuiBets(
+        wallet_address=WALLET_ADDRESS,
+        api_base_url="https://suibets.example",
+        auto_start_server=False,
+    )
+
+    assert api._get_credentials_dict() == {
+        "walletAddress": WALLET_ADDRESS,
+        "baseUrl": "https://suibets.example",
+    }
+
+
+def test_suibets_api_base_url_alone_produces_credentials() -> None:
+    api = SuiBets(api_base_url="https://suibets.example", auto_start_server=False)
+
+    assert api._get_credentials_dict() == {"baseUrl": "https://suibets.example"}
+
+
 # --------------------------------------------------------------------------- #
 # Read-method dispatch tests
 # --------------------------------------------------------------------------- #
diff --git a/sdks/typescript/pmxt/client.ts b/sdks/typescript/pmxt/client.ts
index 04ddc27f..48769b03 100644
--- a/sdks/typescript/pmxt/client.ts
+++ b/sdks/typescript/pmxt/client.ts
@@ -3648,6 +3648,14 @@ export interface SuiBetsOptions extends ExchangeOptions {
      * SUIBETS_WALLET_ADDRESS environment variable on the sidecar.
      */
     walletAddress?: string;
+
+    /**
+     * Base URL of the SuiBets exchange API itself (not the PMXT sidecar —
+     * use `baseUrl` for that). Forwarded to the sidecar as the `baseUrl`
+     * credential. Can also be set via the SUIBETS_BASE_URL environment
+     * variable on the sidecar.
+     */
+    apiBaseUrl?: string;
 }
 
 /**
@@ -3669,25 +3677,29 @@ export interface SuiBetsOptions extends ExchangeOptions {
  */
 export class SuiBets extends Exchange {
     private readonly _walletAddress?: string;
+    private readonly _apiBaseUrl?: string;
 
     constructor(options: SuiBetsOptions = {}) {
         super("suibets", options);
         this._walletAddress = options.walletAddress;
+        this._apiBaseUrl = options.apiBaseUrl;
     }
 
     /**
      * Includes walletAddress in the credentials sent to the sidecar so
-     * that fetchPositions() can reach the /api/p2p/my endpoint.
-     * Falls back to SUIBETS_WALLET_ADDRESS env var on the sidecar side
-     * when walletAddress is not set here.
+     * that fetchPositions() can reach the /api/p2p/my endpoint, and
+     * apiBaseUrl as the `baseUrl` credential controlling the SuiBets
+     * exchange API origin. Each falls back to the corresponding sidecar
+     * env var (SUIBETS_WALLET_ADDRESS / SUIBETS_BASE_URL) when unset.
      */
     protected override getCredentials(): ExchangeCredentials | undefined {
         const base = super.getCredentials();
-        if (!this._walletAddress) return base;
+        if (!this._walletAddress && !this._apiBaseUrl) return base;
         return {
             ...(base ?? {}),
-            walletAddress: this._walletAddress,
-        } as ExchangeCredentials & { walletAddress: string };
+            ...(this._walletAddress ? { walletAddress: this._walletAddress } : {}),
+            ...(this._apiBaseUrl ? { baseUrl: this._apiBaseUrl } : {}),
+        } as ExchangeCredentials;
     }
 }
 
diff --git a/sdks/typescript/tests/exchange-credentials.test.ts b/sdks/typescript/tests/exchange-credentials.test.ts
index ce8f9899..ca7bc6e1 100644
--- a/sdks/typescript/tests/exchange-credentials.test.ts
+++ b/sdks/typescript/tests/exchange-credentials.test.ts
@@ -1,4 +1,4 @@
-import { Exchange, ExchangeOptions } from "../pmxt/client";
+import { Exchange, ExchangeOptions, SuiBets } from "../pmxt/client";
 
 class TestExchange extends Exchange {
   public exposedCredentials() {
@@ -6,6 +6,12 @@ class TestExchange extends Exchange {
   }
 }
 
+class TestSuiBets extends SuiBets {
+  public exposedCredentials() {
+    return this.getCredentials();
+  }
+}
+
 describe("exchange credentials", () => {
   it("accepts and forwards apiSecret with sidecar credentials", () => {
     const options = {
@@ -23,4 +29,28 @@ describe("exchange credentials", () => {
       privateKey: "private-key",
     });
   });
+
+  it("SuiBets forwards apiBaseUrl as the baseUrl credential", () => {
+    const exchange = new TestSuiBets({
+      walletAddress: "0x" + "ab".repeat(32),
+      apiBaseUrl: "https://suibets.example",
+      autoStartServer: false,
+    });
+
+    expect(exchange.exposedCredentials()).toMatchObject({
+      walletAddress: "0x" + "ab".repeat(32),
+      baseUrl: "https://suibets.example",
+    });
+  });
+
+  it("SuiBets apiBaseUrl alone produces credentials", () => {
+    const exchange = new TestSuiBets({
+      apiBaseUrl: "https://suibets.example",
+      autoStartServer: false,
+    });
+
+    expect(exchange.exposedCredentials()).toMatchObject({
+      baseUrl: "https://suibets.example",
+    });
+  });
 });