---
title: "Error Codes"
url: https://docs.catalyst.zoho.com/en/api/introduction/error-codes/
description: "Learn about the common error codes you can encounter while invoking Catalyst APIs"
last_updated: 2026-04-15T10:08:18Z
service: All Services
type: api
---

# Error Codes

When the server encounters an error while processing a client request, it sends an appropriate HTTP Status Code in the
response back to the client. The following errors are recognized by Catalyst:

<table class="content-table">
	<thead>
		<tr>
			<th class="w20p">HTTP Status Code</th>
			<th class="w30p">Error Code</th>
			<th class="w50p">Description</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>403</td>
			<td>`API_LIMIT_REACHED`</td>
			<td>You have reached the upper limits for API calls in your account. Upgrade your license plan.</td>
		</tr>
		<tr>
			<td>409</td>
			<td>`CONFLICT`</td>
			<td>Contradicts with the existing value. Try giving another value.</td>
		</tr>
		<tr>
			<td>409</td>
			<td>`DUPLICATE_ENTRY`</td>
			<td>The email ID you have entered already exists. Please provide a different email ID.</td>
		</tr>
		<tr>
			<td>409</td>
			<td>`DUPLICATE_ENTRY`</td>
			<td>The domain name already exists. Please provide a different value.</td>
		</tr>
		<tr>
			<td>409</td>
			<td>`DUPLICATE_OPERATION`</td>
			<td>The requested operation is already under progress. Please wait until it is completed.</td>
		</tr>
		<tr>
			<td>409</td>
			<td>`DUPLICATE_VALUE`</td>
			<td>The value you have entered already exists. Please provide a different value.</td>
		</tr>
		<tr>
			<td>500</td>
			<td>`EMAIL_ERROR`</td>
			<td>Email sending process failed. Try again after some time.</td>
		</tr>
		<tr>
			<td>410</td>
			<td>`EXPIRED`</td>
			<td>The requested resource has expired. Please try creating it again.</td>
		</tr>
		<tr>
			<td>410</td>
			<td>`EXPIRED_LOG`</td>
			<td>The response log you are trying to download is expired.</td>
		</tr>
		<tr>
			<td>202</td>
			<td>`FUNCTION_ERROR`</td>
			<td>Encountered an internal server error.</td>
		</tr>
		<tr>
			<td>500</td>
			<td>`INTERNAL_SERVER_ERROR`</td>
			<td>Encountered an internal server error.</td>
		</tr>
		<tr>
			<td>403</td>
			<td>`INVALID_CONTENT`</td>
			<td>The given input is not in an acceptable format.</td>
		</tr>
		<tr>
			<td>404</td>
			<td>`INVALID_ID`</td>
			<td>The resource ID you have provided does not exist.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`INVALID_INPUT`</td>
			<td>The table name you have provided does not exist.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`INVALID_INPUT`</td>
			<td>The column name you have provided does not exist.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`INVALID_INPUT`</td>
			<td>The foreign key you have provided doesn't match with the ROWID of the parent table.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`INVALID_INPUT`</td>
			<td>The input you have provided is not valid.</td>
		</tr>
		<tr>
			<td>404</td>
			<td>`INVALID_NAME`</td>
			<td>The email ID you have provided does not exist.</td>
		</tr>
		<tr>
			<td>404</td>
			<td>`INVALID_NAME`</td>
			<td>The table name you have provided does not exist.</td>
		</tr>
		<tr>
			<td>403</td>
			<td>`INVALID_OPERATION`</td>
			<td>The requested operation is invalid.</td>
		</tr>
		<tr>
			<td>405</td>
			<td>`INVALID_REQUEST_METHOD`</td>
			<td>The requested method is not accepted.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`MISMATCH`</td>
			<td>The value provided does not match with the expected one.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`MISSING_FUNCTION`</td>
			<td>The function ID you have provided does not exists.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`MISSING_VALUE`</td>
			<td>The expected input is missing.</td>
		</tr>
		<tr>
			<td>401</td>
			<td>`NO_ACCESS`</td>
			<td>You don't have privileges to perform this action</td>
		</tr>
		<tr>
			<td>204</td>
			<td>`NO_CONTENT_AVAILABLE`</td>
			<td>The request returned an empty response.</td>
		</tr>
		<tr>
			<td>401</td>
			<td>`UNAUTHORISED`</td>
			<td>You are not authorized to perform this action.</td>
		</tr>
		<tr>
			<td>403</td>
			<td>`VERIFICATION_NEEDED`</td>
			<td>Your email address needs to be verified.</td>
		</tr>
		<tr>
			<td>400</td>
			<td>`ZCQL_QUERY_ERROR`</td>
			<td>The format of your query is invalid.</td>
		</tr>
		<tr>
			<td>429</td>
			<td>`TOO_MANY_REQUESTS`</td>
			<td>Concurrency or throttling limits reached for function, web client, or a Catalyst component execution.</td>
		</tr>
	</tbody>
</table>