> ## Documentation Index
> Fetch the complete documentation index at: https://apidoc.cometapi.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Common Misconceptions

> Fix CometAPI token and Key issues: remove token quota limits, set correct Base URL, avoid invalid token errors, and understand concurrency RPM/TPM behavior.

## **1. Why can't I use my token even though I have sufficient balance?**

Please check the following two points:

* **Token quota limitation**: The token may have a quota limit set, which needs to be removed before continued use.
* **Account balance**: Account balance and token quota are independent; tokens need to be set to unlimited quota to function properly.

***

## **2. Why doesn't my Key work? Why is there no response when calling the API?**

The most common reason is **incorrect Base URL setting**.\
Solution:

* Change the Base URL to: `https://api.cometapi.com`.

***

## **3. What are the interface request limits? Does using multiple Keys together increase concurrency?**

* **Individual Keys have no RPM/TPM restrictions**:
  * **Theoretical concurrency capacity**:
    * TPM up to 50 million.
    * RPM up to 30,000.
  * **Global node load balancing**: Guarantees optimal calling and minimal latency.
* **Concurrency upper limit for multiple Keys**: Same as for a single Key, does not stack.
* **No group restrictions**: No VIP node grouping restrictions, large concurrent calls welcome !

***

## **4. Are there concurrency or RPM/TPM limits for a single Key?**

No restrictions whatsoever, cometapi supports extremely large concurrency with absolutely no upper limit.

***

## **5. How do I fill in the parameters when creating a new token?**

1. Enter a **token name**.
2. Click the **"Set to unlimited quota"** button.
3. Select the corresponding option in **token grouping**; each group supports production environment level calls.

***

## **6. Why does the API call return "invalid token"?**

The most common reason is that the Base URL has not been modified.

* Using the default OpenAI official Base URL will cause this issue.
* Solution: Change the Base URL to `https://api.cometapi.com/v1`.

***

## **7. How do I analyze images?**

1. Convert local images to **base64 format**.
2. Call the API for analysis.
3. For specific operation methods, refer to the [API documentation](/overview/quick-start).

***

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