# Response HTTP Status

<table><thead><tr><th width="178.33333333333331">Response</th><th width="221">Error Name</th><th>Description</th></tr></thead><tbody><tr><td>400</td><td>Date format invalid: expected format YYYY-mm-dd</td><td>The date parameter does not follow the requested date format.</td></tr><tr><td>400</td><td>Date format invalid: prior genesis block</td><td>Requested date is before the launch of the VeChainThor mainnet.</td></tr><tr><td>400</td><td>Date format invalid: in future</td><td>Endpoint does not allow to request a date in the future.</td></tr><tr><td>400</td><td>Address is missing</td><td>The request is missing the address parameter.</td></tr><tr><td>400</td><td>Invalid EVM-compatible address</td><td>Requested address doesn't pass checksum, lowercased or uppercased validation.</td></tr><tr><td>400</td><td>Invalid Block Reference</td><td>The blockref is not associated with a block on VeChainThor</td></tr><tr><td>401</td><td>Unauthorized, missing or invalid API-key</td><td>API plan does not allow for access to this endpoint or API key is not valid.</td></tr><tr><td>403</td><td>Access restricted</td><td>API plan does not allow for access to this endpoint. Consider upgrading.</td></tr><tr><td>404</td><td>Endpoint not found</td><td>Endpoint doesn't exist.</td></tr><tr><td>429</td><td>Rate limit exceeded</td><td>Rate limit of associated <a href="rate-limits">API plan</a> was exceeded.</td></tr><tr><td>429</td><td>Daily credit limit exceeded</td><td>Daily limit of associated <a href="rate-limits">API plan</a> has been exceeded.</td></tr><tr><td>429</td><td>Request limit exceeded for {} plan</td><td>Rate limit of associated <a href="rate-limits">API plan</a> was exceeded.</td></tr><tr><td>429</td><td></td><td></td></tr><tr><td>503</td><td>Service Unavailable</td><td>A server-side error occured that prevents the server from fulfilling the api request. Please retry again later.</td></tr></tbody></table>

0 = unset / unknown 1 = mongodb 2 = redis 3 = mysql connection 4 = thor nodes 5 = syntax error query