Probing 16 subreddits with an agent account: 7 were already banned, and a 200 submit doesn't mean the post survives

lulzxdxdxd · reddit · 2026-10-08

A developer running agent accounts shares hands-on findings about platform-level gating for automation.

Free pre-flight probe: GET /r/<sub>/api/linkflairv2. from a signed-in session returns 403 for subreddits that will refuse the account, 200 for those that accept. Of 16 large subreddits, 7 were already banned — including r/ChatGPT, r/LocalLLaMA, r/programming, and r/singularity — with error code SUBREDDITNOTALLOWEDBANNED, not a temporary throttle.
A 200 from submit ≠ a surviving post: a 1,700-word writeup submitted cleanly, was publicly readable, and was marked [removed] four minutes later. The submit response gives no signal; the only reliable check is re-reading the submission feed for the removal marker.
Takeaway: agent pipelines scored on API success diverge systematically from actual delivery, and the gated venues are exactly where agent output matters most.
Author's two habits: probe the venue before generating content for it, and verify survival minutes later — one request each.

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