diff --git a/packages/service-clients/odsp-client/api-report/odsp-client.alpha.api.md b/packages/service-clients/odsp-client/api-report/odsp-client.alpha.api.md
index 8a0462d5c31d..5972f0bb8e70 100644
--- a/packages/service-clients/odsp-client/api-report/odsp-client.alpha.api.md
+++ b/packages/service-clients/odsp-client/api-report/odsp-client.alpha.api.md
@@ -10,6 +10,7 @@ export type IOdspAudience = IServiceAudience<OdspMember>;
 // @beta
 export interface IOdspFluidContainer<TContainerSchema extends ContainerSchema = ContainerSchema> extends IFluidContainer<TContainerSchema> {
     attach(props?: ContainerAttachProps<OdspContainerAttachProps>): Promise<string>;
+    uploadBlob(blob: ArrayBufferLike): Promise<IFluidHandle<ArrayBufferLike>>;
 }
 
 // @beta
diff --git a/packages/service-clients/odsp-client/api-report/odsp-client.beta.api.md b/packages/service-clients/odsp-client/api-report/odsp-client.beta.api.md
index fc893e97c251..5f34a2b56f97 100644
--- a/packages/service-clients/odsp-client/api-report/odsp-client.beta.api.md
+++ b/packages/service-clients/odsp-client/api-report/odsp-client.beta.api.md
@@ -10,6 +10,7 @@ export type IOdspAudience = IServiceAudience<OdspMember>;
 // @beta
 export interface IOdspFluidContainer<TContainerSchema extends ContainerSchema = ContainerSchema> extends IFluidContainer<TContainerSchema> {
     attach(props?: ContainerAttachProps<OdspContainerAttachProps>): Promise<string>;
+    uploadBlob(blob: ArrayBufferLike): Promise<IFluidHandle<ArrayBufferLike>>;
 }
 
 // @beta
diff --git a/packages/service-clients/odsp-client/src/interfaces.ts b/packages/service-clients/odsp-client/src/interfaces.ts
index 2096dd4333d7..620a33bd445c 100644
--- a/packages/service-clients/odsp-client/src/interfaces.ts
+++ b/packages/service-clients/odsp-client/src/interfaces.ts
@@ -5,6 +5,7 @@
 
 import type {
 	IConfigProviderBase,
+	IFluidHandle,
 	ITelemetryBaseLogger,
 } from "@fluidframework/core-interfaces";
 import type {
@@ -97,6 +98,12 @@ export interface IOdspFluidContainer<
 	 * @returns A promise which resolves when the attach is complete, with the string identifier of the container.
 	 */
 	attach(props?: ContainerAttachProps<OdspContainerAttachProps>): Promise<string>;
+
+	/**
+	 * Upload a blob of data.
+	 * @param blob - The blob to upload to the ODSP service.
+	 */
+	uploadBlob(blob: ArrayBufferLike): Promise<IFluidHandle<ArrayBufferLike>>;
 }
 
 /**
diff --git a/packages/service-clients/odsp-client/src/odspClient.ts b/packages/service-clients/odsp-client/src/odspClient.ts
index 44459bd74d50..db8690c54095 100644
--- a/packages/service-clients/odsp-client/src/odspClient.ts
+++ b/packages/service-clients/odsp-client/src/odspClient.ts
@@ -24,6 +24,7 @@ import type { ContainerAttachProps, ContainerSchema } from "@fluidframework/flui
 import {
 	createDOProviderContainerRuntimeFactory,
 	createFluidContainer,
+	isInternalFluidContainer,
 } from "@fluidframework/fluid-static/internal";
 import {
 	OdspDocumentServiceFactory,
@@ -155,6 +156,9 @@ export class OdspClient {
 		const fluidContainer = await createFluidContainer<T>({
 			container,
 		});
+		if (!isInternalFluidContainer(fluidContainer)) {
+			throw new Error("Fluid container is not internal");
+		}
 		const services = await this.getContainerServices(container);
 		return { container: fluidContainer, services };
 	}
@@ -227,6 +231,9 @@ export class OdspClient {
 			return resolvedUrl.itemId;
 		};
 		const fluidContainer = await createFluidContainer<T>({ container });
+		if (!isInternalFluidContainer(fluidContainer)) {
+			throw new Error("Fluid container is not internal");
+		}
 		fluidContainer.attach = attach;
 		return fluidContainer;
 	}