Instagram error 17: User request limit reached

Code 17 is user-scoped throttling: the rate-limiting reference defines it as "the User whose token is being used in the request has reached their rate limit." Platform rate limits are computed per app-user pair on a rolling window, so this fires when the calls made with one user's token - across your app - exceed that user's allowance, even if the app as a whole is nowhere near its budget.

In Instagram messaging integrations, code 17 typically shows up in the connection and management paths rather than the send path: onboarding flows that enumerate Pages and Instagram accounts with a user token, dashboards that refresh account metadata for many workspaces authorized by the same person, or agency setups where one staff account authorized dozens of client integrations and every one of them polls with tokens derived from that single user. Sends made with a Page token are more likely to hit 32 or 4.

The fix is the standard throttling discipline plus one structural change: stop concentrating so much traffic behind one human's identity.

Keep the user token for what only it can do - the login exchange and the initial account listing - and persist everything it returns. Runtime traffic should ride on Page tokens or Instagram-Login account tokens, leaving the per-user budget essentially idle. The platform formula (calls per hour scaled by users) and the messaging-specific per-second ceilings are tabulated in the Instagram limits reference.