HTTP status code
HTTP status code: 501 Not Implemented
As text you can copy
501 Not Implemented- Kind
- Status code
What does 501 Not Implemented mean in HTTP?
The server does not support the functionality needed to fulfil the request. The standard gives the case of a method the server does not recognise and cannot support for any resource.
Risk warning: CFDs and spread bets are complex instruments and come with a high risk of losing money rapidly due to leverage. You can lose money on these products, and each provider publishes its own loss figure under FCA rules. You should consider whether you understand how they work and whether you can afford to take the high risk of losing your money. Automated and API trading can amplify losses through bugs, connectivity failures and runaway orders.
What it means in trading API work
Uncommon. It can mean an unusual HTTP method, or a feature that is documented but not available in the environment you are calling.
This part is this site's own explanation, written for people learning to call a trading API. It is not part of the source cited above and it describes no particular broker.
What should I do about 501 Not Implemented?
Check the method and the endpoint against the documentation for the environment you are using. Retrying will not change the answer.
This page is an independent explanation in plain words. The definition itself is in the source it was read from, which is the authority if the two ever differ.