diff --git a/src/services/metaphor.ts b/src/services/metaphor.ts
index dde3ac2..60c137f 100644
--- a/src/services/metaphor.ts
+++ b/src/services/metaphor.ts
@@ -1,5 +1,7 @@
 import ky from 'ky'
 
+export const METAPHOR_BASE_URL = 'https://api.metaphor.systems'
+
 export type MetaphorSearchResult = {
   author: string | null
   dateCreated: string | null
@@ -18,7 +20,7 @@ export class MetaphorClient {
 
   constructor({
     apiKey = process.env.METAPHOR_API_KEY,
-    baseUrl = 'https://api.metaphor.systems'
+    baseUrl = METAPHOR_BASE_URL
   }: {
     apiKey?: string
     baseUrl?: string
diff --git a/src/services/novu.ts b/src/services/novu.ts
index e02c074..45534bf 100644
--- a/src/services/novu.ts
+++ b/src/services/novu.ts
@@ -1,5 +1,7 @@
 import ky from 'ky'
 
+export const NOVU_BASE_URL = 'https://api.novu.co/v1'
+
 export type NovuSubscriber = {
   subscriberId: string
   email?: string
@@ -22,7 +24,7 @@ export class NovuClient {
 
   constructor({
     apiKey = process.env.NOVU_API_KEY,
-    baseUrl = 'https://api.novu.co/v1'
+    baseUrl = NOVU_BASE_URL
   }: {
     apiKey?: string
     baseUrl?: string
diff --git a/src/services/serpapi.ts b/src/services/serpapi.ts
index 4096526..a5c2bbc 100644
--- a/src/services/serpapi.ts
+++ b/src/services/serpapi.ts
@@ -11,6 +11,8 @@ export interface SerpAPIClientOptions extends Partial<SerpAPIParams> {
   baseUrl?: string
 }
 
+export const SERPAPI_BASE_URL = 'https://serpapi.com'
+
 /**
  * Lightweight wrapper around SerpAPI that only supports Google search.
  *
@@ -23,7 +25,7 @@ export class SerpAPIClient {
 
   constructor({
     apiKey = process.env.SERPAPI_API_KEY ?? process.env.SERP_API_KEY,
-    baseUrl = 'https://serpapi.com',
+    baseUrl = SERPAPI_BASE_URL,
     ...params
   }: SerpAPIClientOptions = {}) {
     if (!apiKey) {