We have no issues with the API currently.
I have just called https://api.companieshouse.gov.uk/company/05143964/registered-office-address
and got back
{
“etag”: “42e51ef535acfd02c5e72e7a7dc360c18448d5ba”,
“kind”: “registered-office-address”,
“links”: {
“self”: “/company/05143964/registered-office-address”
},
“address_line_1”: “34-36 South Parade”,
“locality”: “Whitley Bay”,
“region”: “Tyne And Wear”,
“postal_code”: “NE26 2RQ”
}
I got a friend to test it with a new account from a different IP. He sees the exact same behaviour as me. Works fine with no IP restriction - and a 500 error when IP restriction applied to the API key.