danny-avila/LibreChat · error · Error

[${req.baseUrl}] Endpoint is required

Error message

[${req.baseUrl}] Endpoint is required

What it means

Thrown by getOpenAIClient after it resolves the API version but finds no endpoint identifier. The endpoint is sourced from overrideEndpoint, then req.body.endpoint, then req.query.endpoint; if all are absent the call cannot decide whether to initialize the OpenAI or Azure Assistants client and aborts.

Source

Thrown at api/server/controllers/assistants/helpers.js:192

    data,
  };
};

/**
 * Initializes the OpenAI client.
 * @param {object} params - The parameters object.
 * @param {ServerRequest} params.req - The request object.
 * @param {ServerResponse} params.res - The response object.
 * @param {TEndpointOption} params.endpointOption - The endpoint options.
 * @param {boolean} params.initAppClient - Whether to initialize the app client.
 * @param {string} params.overrideEndpoint - The endpoint to override.
 * @returns {Promise<{ openai: OpenAI, openAIApiKey: string }>} - The initialized OpenAI SDK client.
 */
async function getOpenAIClient({ req, res, endpointOption, initAppClient, overrideEndpoint }) {
  let endpoint = overrideEndpoint ?? req.body?.endpoint ?? req.query?.endpoint;
  const version = await getCurrentVersion(req, endpoint);
  if (!endpoint) {
    throw new Error(`[${req.baseUrl}] Endpoint is required`);
  }

  let result;
  if (endpoint === EModelEndpoint.assistants) {
    result = await initializeClient({ req, res, version, endpointOption, initAppClient });
  } else if (endpoint === EModelEndpoint.azureAssistants) {
    result = await initAzureClient({ req, res, version, endpointOption, initAppClient });
  }

  return result;
}

/**
 * Returns a list of assistants.
 * @param {object} params
 * @param {object} params.req - Express Request
 * @param {AssistantListParams} [params.req.query] - The assistant list parameters for pagination and sorting.
 * @param {object} params.res - Express Response

View on GitHub (pinned to 5ff282f900)

Solutions

1. Include endpoint: 'assistants' (or 'azureAssistants') in the request body or query string.
2. If calling getOpenAIClient server-side, pass overrideEndpoint explicitly.
3. Verify the client/integration still sends the endpoint field after upgrades to the assistants API.

Example fix

// before
fetch('/api/assistants', { method: 'POST', body: JSON.stringify({ name }) })
// after
fetch('/api/assistants', { method: 'POST', body: JSON.stringify({ name, endpoint: 'assistants' }) })

const endpoint = overrideEndpoint ?? req.body?.endpoint ?? req.query?.endpoint;
if (!endpoint) {
  return res.status(400).json({ error: 'endpoint query/body parameter is required' });
}

function hasEndpointArg(req, override) {
  const e = override ?? req.body?.endpoint ?? req.query?.endpoint;
  return typeof e === 'string' && e.length > 0;
}

try { await getOpenAIClient({ req, res }); }
catch (e) { if (/Endpoint is required/.test(e.message)) return res.status(400).json({ error: e.message }); throw e; }

When it happens

Trigger: A POST/GET to the assistants controller that omits the 'endpoint' field in both body and query, and is invoked without an explicit overrideEndpoint argument (e.g. a direct programmatic call or a client that previously relied on a default).

Common situations: Frontend form that stopped sending the endpoint field after a refactor; a custom integration calling the assistants API directly without setting endpoint to 'assistants' or 'azureAssistants'; a misrouted request hitting this controller for a non-assistants action.

Related errors

• [${req.baseUrl}] Invalid version: ${version}
• Trouble deleting Assistant Actions for Assistant ID: ${assis
• Unexpected run status ${run.status}.\nFull run info:\n\n${ru
• no_user_key
• Assistants API key not provided. Please provide it again.

AI-assisted analysis of danny-avila/LibreChat@5ff282f900 (2026-08-12). Data as JSON: /api/errors/e5d7709fadf20ce4. Report an issue: GitHub.