diff --git a/.github/functions/polli-token.js b/.github/functions/polli-token.js
index 6a8e98b..8321b8f 100644
--- a/.github/functions/polli-token.js
+++ b/.github/functions/polli-token.js
@@ -1,5 +1,25 @@
+function readTokenFromEnvironment(context) {
+  const envSources = [];
+  if (context?.env) envSources.push(context.env);
+  if (typeof process !== 'undefined' && process?.env) envSources.push(process.env);
+
+  for (const env of envSources) {
+    const candidate =
+      env?.POLLI_TOKEN ??
+      env?.VITE_POLLI_TOKEN ??
+      env?.POLLINATIONS_TOKEN ??
+      env?.VITE_POLLINATIONS_TOKEN ??
+      null;
+    if (candidate != null) {
+      const value = String(candidate).trim();
+      if (value) return value;
+    }
+  }
+  return null;
+}
+
 export async function onRequest(context) {
-  const token = context?.env?.POLLI_TOKEN ?? context?.env?.VITE_POLLI_TOKEN ?? null;
+  const token = readTokenFromEnvironment(context);
   if (!token) {
     return new Response(JSON.stringify({ error: 'Pollinations token is not configured.' }), {
       status: 404,
diff --git a/src/pollinations-client.js b/src/pollinations-client.js
index 3050dc1..2fb0975 100644
--- a/src/pollinations-client.js
+++ b/src/pollinations-client.js
@@ -145,23 +145,46 @@ function readTokenFromWindow() {
 }
 
 function readTokenFromEnv() {
-  if (!import.meta?.env?.DEV) {
+  const importMetaEnv = typeof import.meta !== 'undefined' ? import.meta.env ?? undefined : undefined;
+  const processEnv = typeof process !== 'undefined' && process?.env ? process.env : undefined;
+
+  const isDev = determineDevelopmentEnvironment(importMetaEnv, processEnv);
+  if (!isDev) {
     return { token: null, source: 'env' };
   }
-  const env = import.meta.env ?? {};
-  const candidate =
-    env.VITE_POLLI_TOKEN ??
-    env.POLLI_TOKEN ??
-    env.VITE_POLLINATIONS_TOKEN ??
-    env.POLLINATIONS_TOKEN ??
-    null;
-  const token = extractTokenValue(candidate);
+
+  const token = extractTokenValue([
+    importMetaEnv?.VITE_POLLI_TOKEN,
+    importMetaEnv?.POLLI_TOKEN,
+    importMetaEnv?.VITE_POLLINATIONS_TOKEN,
+    importMetaEnv?.POLLINATIONS_TOKEN,
+    processEnv?.VITE_POLLI_TOKEN,
+    processEnv?.POLLI_TOKEN,
+    processEnv?.VITE_POLLINATIONS_TOKEN,
+    processEnv?.POLLINATIONS_TOKEN,
+  ]);
+
   if (!token) {
     return { token: null, source: 'env' };
   }
   return { token, source: 'env' };
 }
 
+function determineDevelopmentEnvironment(importMetaEnv, processEnv) {
+  if (importMetaEnv && typeof importMetaEnv.DEV !== 'undefined') {
+    return !!importMetaEnv.DEV;
+  }
+  if (processEnv) {
+    if (typeof processEnv.VITE_DEV_SERVER_URL !== 'undefined') {
+      return true;
+    }
+    if (typeof processEnv.NODE_ENV !== 'undefined') {
+      return processEnv.NODE_ENV !== 'production';
+    }
+  }
+  return false;
+}
+
 function extractTokenValue(value) {
   if (value == null) return null;
   if (typeof value === 'string') {
@@ -213,3 +236,14 @@ function inferReferrer() {
   }
   return null;
 }
+
+function resetTokenCache() {
+  tokenPromise = null;
+  cachedToken = null;
+  cachedSource = null;
+}
+
+export const __testing = {
+  resetTokenCache,
+  determineDevelopmentEnvironment,
+};
diff --git a/tests/polli-token-function-env.test.mjs b/tests/polli-token-function-env.test.mjs
new file mode 100644
index 0000000..f9dc8b8
--- /dev/null
+++ b/tests/polli-token-function-env.test.mjs
@@ -0,0 +1,32 @@
+import assert from 'node:assert/strict';
+import { onRequest } from '../.github/functions/polli-token.js';
+
+export const name = 'Pollinations token function reads secrets from multiple environments';
+
+export async function run() {
+  const originalToken = process.env.POLLI_TOKEN;
+  const originalViteToken = process.env.VITE_POLLI_TOKEN;
+
+  try {
+    delete process.env.VITE_POLLI_TOKEN;
+    process.env.POLLI_TOKEN = 'function-process-token';
+
+    const response = await onRequest({ env: {} });
+    assert.equal(response.status, 200);
+
+    const payload = await response.json();
+    assert.deepEqual(payload, { token: 'function-process-token' });
+  } finally {
+    if (typeof originalToken === 'undefined') {
+      delete process.env.POLLI_TOKEN;
+    } else {
+      process.env.POLLI_TOKEN = originalToken;
+    }
+
+    if (typeof originalViteToken === 'undefined') {
+      delete process.env.VITE_POLLI_TOKEN;
+    } else {
+      process.env.VITE_POLLI_TOKEN = originalViteToken;
+    }
+  }
+}
diff --git a/tests/pollinations-token-env.test.mjs b/tests/pollinations-token-env.test.mjs
new file mode 100644
index 0000000..9713e1b
--- /dev/null
+++ b/tests/pollinations-token-env.test.mjs
@@ -0,0 +1,61 @@
+import assert from 'node:assert/strict';
+import { createPollinationsClient, __testing } from '../src/pollinations-client.js';
+
+export const name = 'Pollinations client resolves tokens from development environment variables';
+
+function createStubResponse(status = 404) {
+  return {
+    status,
+    ok: status >= 200 && status < 300,
+    headers: {
+      get() {
+        return null;
+      },
+    },
+    async json() {
+      return {};
+    },
+    async text() {
+      return '';
+    },
+  };
+}
+
+export async function run() {
+  const originalFetch = globalThis.fetch;
+  const originalToken = process.env.POLLI_TOKEN;
+  const originalNodeEnv = process.env.NODE_ENV;
+
+  try {
+    globalThis.fetch = async () => createStubResponse(404);
+    process.env.POLLI_TOKEN = 'process-env-token';
+    process.env.NODE_ENV = 'development';
+    __testing.resetTokenCache();
+
+    const { client, tokenSource } = await createPollinationsClient();
+    assert.equal(tokenSource, 'env');
+
+    const token = await client._auth.getToken();
+    assert.equal(token, 'process-env-token');
+  } finally {
+    if (originalFetch) {
+      globalThis.fetch = originalFetch;
+    } else {
+      delete globalThis.fetch;
+    }
+
+    if (typeof originalToken === 'undefined') {
+      delete process.env.POLLI_TOKEN;
+    } else {
+      process.env.POLLI_TOKEN = originalToken;
+    }
+
+    if (typeof originalNodeEnv === 'undefined') {
+      delete process.env.NODE_ENV;
+    } else {
+      process.env.NODE_ENV = originalNodeEnv;
+    }
+
+    __testing.resetTokenCache();
+  }
+}
diff --git a/vite.config.mjs b/vite.config.mjs
index 29554a7..2ee533b 100644
--- a/vite.config.mjs
+++ b/vite.config.mjs
@@ -3,6 +3,7 @@ import { defineConfig } from 'vite';
 export default defineConfig({
   root: '.',
   base: './',
+  envPrefix: ['VITE_', 'POLLI_', 'POLLINATIONS_'],
   build: {
     outDir: 'dist',
     emptyOutDir: true,