LinkedIn API request fails with "Unpermitted fields present in RESOURCE_KEY: Data Processing Exception while processing fields [/memberId]" - linkedin

Question

I'm trying the following request:
GET https://api.linkedin.com/v2/people/(id:urn:li:person:<person id>)?oauth2_access_token=<token>&projection=(results*(localizedFirstName,vanityName))
But I always get a:
{
"serviceErrorCode": 100,
"message": "Unpermitted fields present in RESOURCE_KEY: Data Processing Exception while processing fields [/memberId]",
"status": 403
}
If I try to do it using the alternative API:
GET https://api.linkedin.com/v2/people?ids=List((id:urn:li:person:<person id>))&oauth2_access_token=<token>&projection=(results*(localizedFirstName,vanityName))
An Internal Server Error is returned:
{
"message": "Internal Server Error",
"status": 500
}
I'm using Google Chrome to perform those requests.
I tried using Postman too.
Headers:
X-Restli-Protocol-Version: 2.0.0
Authorization: Bearer <token>
Got:
{
"serviceErrorCode": 0,
"message": "Syntax exception in path variables",
"status": 400
}
My app permissions are:
r_emailaddress
r_ads
w_organization_social
rw_ads
r_basicprofile
r_liteprofile
r_ads_reporting
r_organization_social
rw_organization_admin
w_member_social
I tried other APIs (socialActivity, ugcPosts) and everything looks fine.
I checked my API usages at https://www.linkedin.com/developers/apps/<id>/usage and people usage is currently 0%.
The tested user profiles are also public.

Answer 1

You should only use the id (instead of the urn). also the fields projection is wrong:
Use:
projection=(localizedFirstName,vanityName)
Instead of:
projection=(results*(localizedFirstName,vanityName))
As example:
curl -H "X-Restli-Protocol-Version: 2.0.0" \
"https://api.linkedin.com/v2/me?oauth2_access_token=<TOKEN>&projection=(id)"
Will return
{
"id": <ID>
}
and use it as:
curl -H "X-Restli-Protocol-Version: 2.0.0" \
"https://api.linkedin.com/v2/people/(id:<ID>)?oauth2_access_token=<TOKEN>&projection=(localizedFirstName,vanityName)"
So:
{
"vanityName": "<VANITY-NAME>",
"localizedFirstName": "<NAME>"
}
Hope this help

Answer 2

id parameter needs only person_id but you are providing urn.Try this https://api.linkedin.com/v2/people/(id:person_id) and don't forgot to include X-RestLi-Protocol-Version:2.0.0 in header while making call.