diff --git a/docs/content/docs/plugins/organization.mdx b/docs/content/docs/plugins/organization.mdx
index 8cd4801a..86e3452a 100644
--- a/docs/content/docs/plugins/organization.mdx
+++ b/docs/content/docs/plugins/organization.mdx
@@ -393,6 +393,21 @@ To get the current member of the organization you can use the `organization.getA
 const member = await client.organization.getActiveMember()
 ```
 
+### Add Member
+
+If you want to add a member directly to an organization without sending an invitation, you can use the `addMember` function which can only be invoked on the server.
+
+```ts title="api.ts"
+import { auth } from "@/auth";
+
+auth.api.addMember({
+  body: {
+      userId: "user-id",
+      organizationId: "organization-id",
+      role: "admin"
+  }
+})
+```
 
 ## Access Control
 
diff --git a/packages/better-auth/src/api/routes/session.ts b/packages/better-auth/src/api/routes/session.ts
index 97e56340..28110c6c 100644
--- a/packages/better-auth/src/api/routes/session.ts
+++ b/packages/better-auth/src/api/routes/session.ts
@@ -214,7 +214,7 @@ export const getSessionFromCtx = async <
 	return session as {
 		session: S & Session;
 		user: U & User;
-	};
+	} | null;
 };
 
 export const sessionMiddleware = createAuthMiddleware(async (ctx) => {
diff --git a/packages/better-auth/src/plugins/organization/organization.test.ts b/packages/better-auth/src/plugins/organization/organization.test.ts
index 408e8bcf..9342a92b 100644
--- a/packages/better-auth/src/plugins/organization/organization.test.ts
+++ b/packages/better-auth/src/plugins/organization/organization.test.ts
@@ -302,6 +302,31 @@ describe("organization", async (it) => {
 		expectTypeOf(auth.api.createOrganization).toBeFunction();
 		expectTypeOf(auth.api.getInvitation).toBeFunction();
 	});
+
+	it("should add member on the server directly", async () => {
+		const newUser = await auth.api.signUpEmail({
+			body: {
+				email: "new-member@email.com",
+				password: "password",
+				name: "new member",
+			},
+		});
+		const org = await auth.api.createOrganization({
+			body: {
+				name: "test",
+				slug: "test",
+			},
+			headers,
+		});
+		const member = await auth.api.addMember({
+			body: {
+				organizationId: org?.id,
+				userId: newUser.user.email,
+				role: "admin",
+			},
+		});
+		expect(member?.role).toBe("admin");
+	});
 });
 
 describe("access control", async (it) => {
diff --git a/packages/better-auth/src/plugins/organization/organization.ts b/packages/better-auth/src/plugins/organization/organization.ts
index 172ce554..d6c564b7 100644
--- a/packages/better-auth/src/plugins/organization/organization.ts
+++ b/packages/better-auth/src/plugins/organization/organization.ts
@@ -29,6 +29,7 @@ import {
 	rejectInvitation,
 } from "./routes/crud-invites";
 import {
+	addMember,
 	getActiveMember,
 	removeMember,
 	updateMemberRole,
@@ -215,6 +216,7 @@ export const organization = <O extends OrganizationOptions>(options?: O) => {
 		acceptInvitation,
 		getInvitation,
 		rejectInvitation,
+		addMember: addMember<O>(),
 		removeMember,
 		updateMemberRole: updateMemberRole(options as O),
 		getActiveMember,
diff --git a/packages/better-auth/src/plugins/organization/routes/crud-members.ts b/packages/better-auth/src/plugins/organization/routes/crud-members.ts
index e475eb4e..c281405e 100644
--- a/packages/better-auth/src/plugins/organization/routes/crud-members.ts
+++ b/packages/better-auth/src/plugins/organization/routes/crud-members.ts
@@ -4,7 +4,78 @@ import { getOrgAdapter } from "../adapter";
 import { orgMiddleware, orgSessionMiddleware } from "../call";
 import type { InferRolesFromOption, Member } from "../schema";
 import { APIError } from "better-call";
+import type { User } from "../../../db/schema";
+import { generateId } from "../../../utils";
 import type { OrganizationOptions } from "../organization";
+import { getSessionFromCtx } from "../../../api";
+
+export const addMember = <O extends OrganizationOptions>() =>
+	createAuthEndpoint(
+		"/organization/add-member",
+		{
+			method: "POST",
+			body: z.object({
+				userId: z.string(),
+				role: z.string() as unknown as InferRolesFromOption<O>,
+				organizationId: z.string().optional(),
+			}),
+			use: [orgMiddleware],
+			metadata: {
+				SERVER_ONLY: true,
+			},
+		},
+		async (ctx) => {
+			const session = ctx.body.userId
+				? await getSessionFromCtx<{
+						session: {
+							activeOrganizationId?: string;
+						};
+					}>(ctx).catch((e) => null)
+				: null;
+			const orgId =
+				ctx.body.organizationId || session?.session.activeOrganizationId;
+			if (!orgId) {
+				return ctx.json(null, {
+					status: 400,
+					body: {
+						message: "No active organization found!",
+					},
+				});
+			}
+
+			const adapter = getOrgAdapter(ctx.context, ctx.context.orgOptions);
+
+			const user = await ctx.context.internalAdapter.findUserById(
+				ctx.body.userId,
+			);
+
+			if (!user) {
+				throw new APIError("BAD_REQUEST", {
+					message: "User not found!",
+				});
+			}
+
+			const alreadyMember = await adapter.findMemberByEmail({
+				email: user.email,
+				organizationId: orgId,
+			});
+			if (alreadyMember) {
+				throw new APIError("BAD_REQUEST", {
+					message: "User is already a member of this organization",
+				});
+			}
+
+			const createdMember = await adapter.createMember({
+				id: generateId(),
+				organizationId: orgId,
+				userId: user.id,
+				role: ctx.body.role as string,
+				createdAt: new Date(),
+			});
+
+			return ctx.json(createdMember);
+		},
+	);
 
 export const removeMember = createAuthEndpoint(
 	"/organization/remove-member",