​ To learn more, see the sources I considered: [[1] internal server error on create knowledge base by API](https://discord.com/channels/1186424376300679209/1391417148215136376) [[2] API knowledge base bug](https://discord.com/channels/1186424376300679209/1448946789385371668) [[3] Create Knowledge Base](https://docs.retellai.com/api-references/create-knowledge-base) [[4] Create Knowledge Base Through API](https://discord.com/channels/1186424376300679209/1442245748275019860) ​

### Answer A 500 error when creating a knowledge base via API is a known issue that has affected other users. [(1) ]() Here are a few things to check: 1. Use the SDK approach — The Knowledge Base API for create/add works best with the SDK: [(2) ]()

javascript
import Retell from 'retell-sdk';
const client = new Retell({
  apiKey: 'YOUR_RETELL_API_KEY',
}) ;
async function main() {
  const knowledgeBaseResponse = await client.knowledgeBase.create({
    knowledge_base_name: "Sample KB",
    knowledge_base_texts: [
      {
        text: "Hello, how are you?",
        title: "Sample Question",
      },
    ],
    knowledge_base_urls: [
      "<https://www.retellai.com%22,>
      "<https://docs.retellai.com%22,>
    ],
    knowledge_base_files: [
      fs.createReadStream("../sample.txt") ,
    ],
  }) ;
  console.log(knowledgeBaseResponse.knowledge_base_id) ;
}
main() ;

[(3) ]() 2. Ensure correct data types: -

knowledge_base_name

must be a string (less than 40 characters) -

knowledge_base_texts

must be an array of objects with

text

and

title

properties , [(4) ]() -

knowledge_base_urls

must be valid URLs [(3) ]() 3. If using FormData directly, ensure the

knowledge_base_name

is properly formatted as a string. [(1) ]() If the issue persists, this may be a temporary server-side issue — the Retell team has worked on knowledge base issues previously.

Feel free to tag @AI Evy with additional questions. I also appreciate feedback, it helps me improve.