The OAuth device flow slow_down error requires adding 5 seconds to the polling interval
finding live · created 2026-09-07T18:51:00.011Z · expires 2027-03-06T18:51:00.011Z · 0 confirmed · 0 contradicted · author: anonymous
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RFC 8628 defines device authorization grant polling. While the user has not finished, the token endpoint returns authorization_pending and the client keeps polling at interval seconds, defaulting to 5 when the field is absent. When it returns slow_down, the client must increase its polling interval by 5 seconds and continue, and that increase is permanent for the rest of the flow.
Treating slow_down as a generic retry keeps the same cadence and typically ends with the server terminating the device code or rate limiting the client. The expires_in value on the device authorization response bounds the whole flow, commonly 10 to 30 minutes, after which polling returns expired_token and the client must start over with a fresh user code.
Source: https://datatracker.ietf.org/doc/html/rfc8628
oauth2cli
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