diff --git a/packages/core/src/agent/tools/data/finance/api.ts b/packages/core/src/agent/tools/data/finance/api.ts
index ab0a3a22..15004438 100644
--- a/packages/core/src/agent/tools/data/finance/api.ts
+++ b/packages/core/src/agent/tools/data/finance/api.ts
@@ -5,7 +5,7 @@
  * All endpoints use GET with query parameters.
  */
 
-import { API_BASE_URL, getAuthHeaders } from "../../../../hub/api-client.js";
+import { getApiBaseUrl, getAuthHeaders } from "../../../../hub/api-client.js";
 
 const PATH_PREFIX = "/api/v1/financial";
 const TIMEOUT_MS = 30_000;
@@ -24,7 +24,7 @@ export async function financeFetch<T = Record<string, unknown>>(
 ): Promise<{ data: T; url: string }> {
   const authHeaders = getAuthHeaders("to use financial data tools");
 
-  const url = new URL(PATH_PREFIX + path, API_BASE_URL);
+  const url = new URL(PATH_PREFIX + path, getApiBaseUrl());
   for (const [key, value] of Object.entries(params)) {
     if (value === undefined || value === null) continue;
     if (Array.isArray(value)) {
diff --git a/packages/core/src/agent/tools/web/web-search.ts b/packages/core/src/agent/tools/web/web-search.ts
index 67558acc..5d2bece1 100644
--- a/packages/core/src/agent/tools/web/web-search.ts
+++ b/packages/core/src/agent/tools/web/web-search.ts
@@ -1,7 +1,7 @@
 import { Type } from "@sinclair/typebox";
 import type { AgentTool } from "@mariozechner/pi-agent-core";
 
-import { API_BASE_URL, getAuthHeaders } from "../../../hub/api-client.js";
+import { getApiBaseUrl, getAuthHeaders } from "../../../hub/api-client.js";
 import {
   DEFAULT_CACHE_TTL_MINUTES,
   DEFAULT_TIMEOUT_SECONDS,
@@ -61,7 +61,7 @@ async function runDevvSearch(params: {
 }> {
   const authHeaders = getAuthHeaders("to use web search");
 
-  const res = await fetch(`${API_BASE_URL}${WEB_SEARCH_PATH}`, {
+  const res = await fetch(`${getApiBaseUrl()}${WEB_SEARCH_PATH}`, {
     method: "POST",
     headers: {
       "Content-Type": "application/json",
diff --git a/packages/core/src/hub/api-client.ts b/packages/core/src/hub/api-client.ts
index 7b54cf07..c5888b5b 100644
--- a/packages/core/src/hub/api-client.ts
+++ b/packages/core/src/hub/api-client.ts
@@ -1,6 +1,8 @@
 import { getLocalAuth } from "./auth-store.js";
 
-export const API_BASE_URL = "https://api.multica.ai";
+export function getApiBaseUrl(): string {
+  return process.env.MULTICA_API_URL || "https://api.multica.ai";
+}
 
 /**
  * Return auth headers for the proxy API.
diff --git a/packages/core/src/hub/index.ts b/packages/core/src/hub/index.ts
index 93c15b7a..a15a27f6 100644
--- a/packages/core/src/hub/index.ts
+++ b/packages/core/src/hub/index.ts
@@ -2,5 +2,5 @@ export { Hub } from "./hub.js";
 export type { MessageSource, InboundMessageEvent } from "./hub.js";
 export { getHubId } from "./hub-identity.js";
 export { getLocalAuth, type LocalAuthData } from "./auth-store.js";
-export { API_BASE_URL, getAuthHeaders } from "./api-client.js";
+export { getApiBaseUrl, getAuthHeaders } from "./api-client.js";
 export type { HubOptions } from "./types.js";