# eBay API error 1001: Invalid access token

# Common cause

Expired token: Access tokens don't last long, typically just a few hours. This happens when you make an API call with an old token.

# Sample output

{
  "errors" : [ {
    "errorId" : 1001,
    "domain" : "OAuth",
    "category" : "REQUEST",
    "message" : "Invalid access token",
    "longMessage" : "Invalid access token. Check the value of the Authorization HTTP request header."
  } ]
}