Sider × AI Code With
Use AI Code With in Sider: third-party API / relay setup
Use AI Code With inside the Sider browser sidebar. After you pick Custom API Key → OpenAI, click Check and send a test message to verify. This page covers the setup steps, common errors, and FAQ.
Install the Sider browser extension first (Chrome is primary; Edge can use the same extension), then finish Custom API Key setup in Settings. Enter the key only in Sider, never on this page.
- Provider
- OpenAI
- API proxy URL
- https://api.aicodewith.ai/v1
- API Key
- sk-xxxxxxxx
Quick setup
In Sider settings, pick Custom API Key → OpenAI, then enter the API key and API proxy URL. After Check succeeds, Sider syncs the model list. About 3 minutes.
Sider is a browser AI sidebar. After you pick Custom API Key and configure OpenAI, synced models are available in chat — no Model IDs on this page, and never paste a real key here.
Add or open an existing API
Open Sider. If you see Add API key / Skip, choose add existing API and go to Settings. Signed-in users can open Settings → General → AI Access directly.
Open Sider. If you see Add API key / Skip, choose add existing API. Pick Custom API Key → OpenAI
Under AI Access, set the service provider to Custom API Key and enable only OpenAI (not DeepSeek, Groq, or Google). Paste your AI Code With API key and set API proxy URL to https://api.aicodewith.ai/v1 (include /v1, no trailing /).
Settings → General → AI Access → Custom API Key, enable only OpenAI. Check and sync the model list
Click Check. On success you should see Connection successful and the model list syncs. Do not put /v1/chat/completions in the API proxy URL. If the list is empty, type a catalog Model ID and press +, or use Update list.
After Check succeeds, Sider syncs available models. This page has no model cards, and you do not type Model IDs here. View supported models
Set API proxy URL to https://api.aicodewith.ai/v1, click Check, then use the synced list. The model count in the screenshot is UI only. Send a test message
Switch to a synced model and send a test message. A normal reply is the success signal; then match the call by time and model in AI Code With usage records. A green Check is not enough.
Switch to a synced model and send a test message. A normal reply is success; then match usage records. gemini-2.5-pro in the screenshot only shows the chat pane.
How does Sider connect to AI Code With?
Sider uses Custom API Key over an OpenAI-compatible endpoint. Connecting to AI Code With only needs three fields, then Check, then a chat test:
- Add or open an existing API
- Open Sider. If you see Add API key / Skip, choose add existing API and go to Settings. Signed-in users can open Settings → General → AI Access directly.
- Pick Custom API Key → OpenAI
- Under AI Access, set the service provider to Custom API Key and enable only OpenAI (not DeepSeek, Groq, or Google).
- Enter key + API proxy URL and Check
- Paste your AI Code With API key and set API proxy URL to https://api.aicodewith.ai/v1 (include /v1, no trailing /). Click Check. On success you should see Connection successful and the model list syncs.
- Pick a model, send a message, match usage
- Switch to a synced model and send a test message. A normal reply is the success signal; then match the call by time and model in AI Code With usage records. A green Check is not enough.
Flow: Sider sidebar → Custom API Key (OpenAI) → AI Code With API. Everything is configured inside Sider. No files to edit, and no Model IDs to type on this page.
Frequently asked questions
New to Sider?
Sider is a browser AI sidebar (web chat is also available). Install it from the Chrome Web Store, then configure Custom API Key in Settings.
Chrome Web Store
Install Sider from the Chrome Web Store. Edge can use the same extension. The web chat entry is https://sider.ai/chat. After install, open Settings → General → AI Access.
Open the Chrome Web StoreFull install guidance follows the official Sider site; this site does not host Sider packages or images.
Common error troubleshooting
The most frequent problems fall into 4 categories.
Connection failed. Please check your API key and proxy settings.
Symptom: Check shows this toast, or the form never becomes Connection successful.
Cause: Usually the API key is invalid, copied with spaces, is a Sider-issued key, or the key is disabled / out of credit.
- Re-paste the AI Code With API key in the OpenAI form (no leading/trailing spaces)
- Confirm the key is from AI Code With Key Management, not a Sider subscription key
- Click Check again; if it still fails, send a short chat anyway (Check can fail while chat still works)
API proxy URL missing /v1 or includes a full path
Symptom: Check fails, or the model list does not load.
Cause: Sider joins paths from an OpenAI SDK root. Missing /v1, using https://api.aicodewith.ai, or appending /v1/chat/completions hits the wrong URL.
- API proxy URL must be https://api.aicodewith.ai/v1
- Remove any trailing /
- Do not append /v1/models or /chat/completions
Empty model list / cannot pick the new model
Symptom: After Check the list is empty, or chat cannot select the synced model.
Cause: You did not press +, Check did not fetch GET /v1/models, or the Model ID does not match the catalog.
- Confirm OpenAI is selected, not DeepSeek/Groq/Google
- Confirm the API proxy URL includes /v1
- Press + with a catalog Model ID, or Update list, then reopen the chat model picker
Wrong provider or still on Sider Mode
Symptom: You pasted a key but still use Sider credits, or YouTube Summary / Translate is unavailable.
Cause: Service provider is still Sider (Recommended), or Custom API Key is set to DeepSeek/Groq/Google/Anthropic. YouTube Summary and Translate stay Sider-mode-only.
- Switch AI Access to Custom API Key
- Enable only OpenAI
- Do not promise YouTube Summary / Translate on BYOK
Need the full guide?
Every config parameter, the complete model list, and more troubleshooting live in the AI Code With docs.
Open the AI Code With docs