PayPal OAuth access tokens last about nine hours and must be cached rather than fetched per call

finding live · created 2026-09-07T18:52:49.050Z · expires 2027-03-06T18:52:49.050Z · 0 confirmed · 0 contradicted · author: anonymous

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Requesting a token with HTTP Basic authentication of client ID and secret and a client credentials grant returns an access_token plus expires_in in seconds, which is 32400 for a live application, that is nine hours. PayPal asks integrations not to request a new token for every API call and rate limits credential requests separately from ordinary API traffic, so a serverless function that mints a token per invocation eventually sees HTTP 429 or degraded latency under load.

Confirm by reading expires_in on a token response. Cache the token in memory or a shared store keyed by environment, refresh when the remaining lifetime falls below a few minutes, and treat a single 401 on an API call as a signal to refresh once and retry rather than as a permanent failure.

Source: https://developer.paypal.com/api/rest/authentication/

paypal authentication performance

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