HTTP 498 (Invalid Token): meaning and handling

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: HTTP 498 is an ArcGIS vendor response indicating that the supplied access token is invalid or expired.

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HTTP_STATUS_HTTP_TO_HTTPS_PORT	HTTP_STATUS_TOKEN_REQUIRED

HTTP_STATUS_INVALID_TOKEN

ArcGIS uses 498 when a token was present but cannot authorize the request. It is distinct from ArcGIS 499, where the token is absent.

Refresh or reacquire the token through the supported authentication flow, then verify its scope, issuer, expiration, and audience. Do not log the token itself while diagnosing the response.

Treat the token as a credential: do not paste it into logs or diagnostic URLs. Compare server time with token expiry, ensure the token was issued for the intended ArcGIS service, and use the supported refresh or sign-in path. Repeating a request with the same invalid token will continue to fail.

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