Unable to authenticate with the IG API

[mgwuk]

I'm trying to authenticate with the IG API and having trouble.

If I use my IG username and password for authentication to, "https://api.ig.com/gateway/deal/session" I get the following error message: 
error.public-api.failure.stockbroking-not-supported

In the API settings section there is something called Web API at the bottom. If I set a username and password and use that I get the following error message:
service.security.authentication.failure-client-documents-required

Can someone please confirm which username and password should be used? It sounds like it may be the Web API but it's saying client documents required. I am pretty sure I've done this or I wouldn't have an account right?

[andysinclair]

As far as I understand it, the API can only be used with spreadbetting or CFD accounts - not general stock broking or ISA accounts. The error message seems to suggest that it is trying to connect to a stock broking account.

I suggest you contact the API support team directly: webapisupport@ig.com

[bug-or-feature]

There's an answer to your first question here:

https://trading-ig.readthedocs.io/en/latest/faq.html#why-do-see-an-error-like-public-api-failure-stockbroking-not-supported

For your second, I suggest logging into the web portal. There's probably some T&Cs to acknowledge, or similar. The API can't deal with that