Enhance logging and update README for SSRF warning

- Updated console log messages in cost.ts and proxy.ts for clarity and consistency.
- Added important SSRF warning in README.md regarding localhost access issues with certain clients, along with solutions using external proxy services.

README.md

@@ -49,6 +49,9 @@ OpenProxy uses path prefixes for clean provider detection:
 | `/openai/*` | `OPENAI_UPSTREAM_URL/*` | `Authorization: Bearer <key>` |
 | `/anthropic/*` | `ANTHROPIC_UPSTREAM_URL/*` | `x-api-key: <key>` or `Authorization: Bearer <key>` |
 
+### SSRF Warning [Important]
+
+Some clients (e.g. Cursor) may block access to `localhost` or `127.0.0.1` URLs. If you encounter this issue, you can use an external proxy service like `ngrok` to open up your `localhost:3007` port to a public domain. This will enable you to use OpenProxy with such services.
 
 ### PostgreSQL Logging
 
@@ -96,12 +99,26 @@ For example, to use Z.AI or other Anthropic-compatible providers with Claude Cod
 export ANTHROPIC_UPSTREAM_URL="https://api.z.ai/api/anthropic"
 export DATABASE_URL="postgresql://user:password@localhost:5432/database_name"
 pnpm dev
-
-# Configure Claude Code to use:
-# API Base URL: http://localhost:3007/anthropic
 ```
 
-### Using with OpenAI-compatible clients
+Configure Claude Code to use the following URL: `http://localhost:3007/anthropic`
+
+### Using with Cursor
+
+For example, to use Z.AI or other Anthropic-compatible providers with Cursor:
+
+```bash
+export ANTHROPIC_UPSTREAM_URL="https://api.z.ai/api/anthropic"
+export DATABASE_URL="postgresql://user:password@localhost:5432/database_name"
+pnpm dev
+```
+
+> Cursor blocks access to `localhost` or `127.0.0.1` URLs by default. You can use an external proxy service like `ngrok` to open up your `localhost:3007` port to a public domain. Refer to the [SSRF Warning](#ssrf-warning-important) for more details.
+
+Configure Cursor to use the following URL for OpenAI API requests: `http://public-domain.ngrok-free.app/openai`
+Configure Cursor to use the following URL for Anthropic API requests: `http://public-domain.ngrok-free.app/anthropic`
+
+### Using with other OpenAI-compatible clients
 
 For example, to use Z.AI or other OpenAI-compatible providers with OpenAI-compatible clients:
 

cost.ts

@@ -133,7 +133,7 @@ export async function loadHeliconeCosts(): Promise<void> {
     }
 
     heliconeCostsLoaded = true;
-    console.log(`\x1b[36m  🌎 Loaded ${data.metadata.total_models} model costs from Helicone\x1b[0m`);
+    console.log(`\x1b[96m  🌎 Loaded ${data.metadata.total_models} model costs from Helicone API\x1b[0m`);
   } catch (error) {
     console.warn(`\x1b[33m  ⚠️  Failed to load Helicone costs: ${error instanceof Error ? error.message : error}\x1b[0m`);
   }

proxy.ts

@@ -281,6 +281,7 @@ async function persistDatabaseRecord(data: Record<string, any>) {
  */
 const server = http.createServer(async (req: IncomingMessage, res: ServerResponse) => {
   const startTime = Date.now();
+  console.log(`[\x1b[30m${new Date().toISOString()}\x1b[0m] \x1b[93m${req.method} \x1b[0m\x1b[94m${req.url}\x1b[0m`);
   try {
     const url = new URL(req.url || "/", `http://${req.headers.host}`);
     const path = url.pathname;
@@ -483,10 +484,10 @@ async function startServer() {
   await loadHeliconeCosts();
 
   server.listen(PORT, () => {
-    console.log(`\n\x1b[32mOpenProxy upstream connections activated ⟣⟢\x1b[0m\n`);
+    console.log(`\n\x1b[32mOpenProxy ready... ⟣⟢\x1b[0m\n`);
 
-    if (OPENAI_UPSTREAM_URL) console.log(`\x1b[34m  📡 http://localhost:${PORT}/openai/* → ${OPENAI_UPSTREAM_URL}\x1b[0m`);
+    if (OPENAI_UPSTREAM_URL) console.log(`\x1b[94m  📡 http://localhost:${PORT}/openai/* → ${OPENAI_UPSTREAM_URL}\x1b[0m`);
-    if (ANTHROPIC_UPSTREAM_URL) console.log(`\x1b[34m  📡 http://localhost:${PORT}/anthropic/* → ${ANTHROPIC_UPSTREAM_URL}\x1b[0m\n`);
+    if (ANTHROPIC_UPSTREAM_URL) console.log(`\x1b[94m  📡 http://localhost:${PORT}/anthropic/* → ${ANTHROPIC_UPSTREAM_URL}\x1b[0m\n`);
   });
 }