diff --git a/lib/artist/createKnowledgeBase.ts b/lib/artist/createKnowledgeBase.ts
new file mode 100644
index 000000000..145614dcf
--- /dev/null
+++ b/lib/artist/createKnowledgeBase.ts
@@ -0,0 +1,70 @@
+import { uploadToArweave } from "@/lib/arweave/uploadToArweave";
+import { arweaveGatewayUrl } from "@/lib/arweave/arweaveGatewayUrl";
+import { selectAccountInfo } from "@/lib/supabase/account_info/selectAccountInfo";
+import { updateAccountInfo } from "@/lib/supabase/account_info/updateAccountInfo";
+import { insertAccountInfo } from "@/lib/supabase/account_info/insertAccountInfo";
+import type { Knowledge } from "./updateArtistProfile";
+
+/**
+ * Creates a knowledge base entry for an artist by uploading text to Arweave
+ * and appending it to the artist's knowledges array.
+ *
+ * @param artistId - The artist account ID
+ * @param knowledgeBaseText - The text content to add to the knowledge base
+ * @returns The created knowledge entry with Arweave URL
+ */
+export async function createKnowledgeBase(
+  artistId: string,
+  knowledgeBaseText: string,
+): Promise<Knowledge> {
+  if (!knowledgeBaseText || knowledgeBaseText.trim().length === 0) {
+    throw new Error("Knowledge base text is required");
+  }
+
+  // Upload text to Arweave
+  const textBuffer = Buffer.from(knowledgeBaseText, "utf-8");
+  const transaction = await uploadToArweave(textBuffer, "text/plain");
+  const arweaveUrl = `ar://${transaction.id}`;
+  const fetchableUrl = arweaveGatewayUrl(arweaveUrl);
+
+  // Generate a name from the first line or a default name
+  const firstLine = knowledgeBaseText.split("\n")[0].trim();
+  const name = firstLine.length > 0 && firstLine.length <= 100 ? firstLine : "Knowledge Base Entry";
+
+  // Create the knowledge entry
+  const newKnowledge: Knowledge = {
+    url: fetchableUrl || arweaveUrl,
+    name,
+    type: "text/plain",
+  };
+
+  // Get current account_info
+  const accountInfo = await selectAccountInfo(artistId);
+
+  // Get existing knowledges or initialize empty array
+  const existingKnowledges: Knowledge[] = accountInfo?.knowledges
+    ? (accountInfo.knowledges as unknown as Knowledge[])
+    : [];
+
+  // Append new knowledge (deduplicate by URL)
+  const knowledgeMap = new Map<string, Knowledge>();
+  existingKnowledges.forEach(k => {
+    knowledgeMap.set(k.url, k);
+  });
+  knowledgeMap.set(newKnowledge.url, newKnowledge);
+  const updatedKnowledges = Array.from(knowledgeMap.values());
+
+  // Update account_info
+  if (accountInfo) {
+    await updateAccountInfo(artistId, {
+      knowledges: updatedKnowledges as unknown as typeof accountInfo.knowledges,
+    });
+  } else {
+    await insertAccountInfo({
+      account_id: artistId,
+      knowledges: updatedKnowledges as unknown as typeof accountInfo.knowledges,
+    });
+  }
+
+  return newKnowledge;
+}
diff --git a/lib/mcp/tools/index.ts b/lib/mcp/tools/index.ts
index 006f6bccd..d39463de9 100644
--- a/lib/mcp/tools/index.ts
+++ b/lib/mcp/tools/index.ts
@@ -9,6 +9,7 @@ import { registerContactTeamTool } from "./registerContactTeamTool";
 import { registerUpdateAccountInfoTool } from "./registerUpdateAccountInfoTool";
 import { registerAllArtistSocialsTools } from "./artistSocials";
 import { registerSearchWebTool } from "./registerSearchWebTool";
+import { registerCreateKnowledgeBaseTool } from "./registerCreateKnowledgeBaseTool";
 
 /**
  * Registers all MCP tools on the server.
@@ -27,4 +28,5 @@ export const registerAllTools = (server: McpServer): void => {
   registerContactTeamTool(server);
   registerUpdateAccountInfoTool(server);
   registerSearchWebTool(server);
+  registerCreateKnowledgeBaseTool(server);
 };
diff --git a/lib/mcp/tools/registerCreateKnowledgeBaseTool.ts b/lib/mcp/tools/registerCreateKnowledgeBaseTool.ts
new file mode 100644
index 000000000..cfe182852
--- /dev/null
+++ b/lib/mcp/tools/registerCreateKnowledgeBaseTool.ts
@@ -0,0 +1,54 @@
+import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
+import { z } from "zod";
+import { createKnowledgeBase } from "@/lib/artist/createKnowledgeBase";
+import { getToolResultSuccess } from "@/lib/mcp/getToolResultSuccess";
+import { getToolResultError } from "@/lib/mcp/getToolResultError";
+
+const createKnowledgeBaseSchema = z.object({
+  artistId: z
+    .string()
+    .min(1, "Artist account ID is required")
+    .describe(
+      "The artist_account_id to add the knowledge base to. If not provided, check system prompt for the active artist_account_id.",
+    ),
+  knowledgeBaseText: z
+    .string()
+    .min(1, "Knowledge base text is required")
+    .describe("Text to add to the knowledge base"),
+});
+
+type CreateKnowledgeBaseArgs = z.infer<typeof createKnowledgeBaseSchema>;
+
+/**
+ * Registers the "create_knowledge_base" tool on the MCP server.
+ * Adds a knowledge base file to an artist by uploading text to Arweave and appending it to the artist's knowledges.
+ *
+ * @param server - The MCP server instance to register the tool on.
+ */
+export function registerCreateKnowledgeBaseTool(server: McpServer): void {
+  server.registerTool(
+    "create_knowledge_base",
+    {
+      description: `Adds a knowledge base file to the active artist by generating a text file and appending it to the list of existing knowledge bases. The text will be uploaded to Arweave for permanent storage.`,
+      inputSchema: createKnowledgeBaseSchema,
+    },
+    async (args: CreateKnowledgeBaseArgs) => {
+      try {
+        const knowledge = await createKnowledgeBase(args.artistId, args.knowledgeBaseText);
+
+        const response = {
+          success: true,
+          knowledge,
+          message: "Knowledge base text prepared for creation and storage.",
+        };
+
+        return getToolResultSuccess(response);
+      } catch (error) {
+        console.error("Error creating knowledge base:", error);
+        return getToolResultError(
+          error instanceof Error ? error.message : "Failed to create knowledge base",
+        );
+      }
+    },
+  );
+}