X backs off attestation change after posting broke on third-party clients and X Lite on Android [U: Attestation checks are back]

Update 11/03/26 – 11:23 am (IST): The attestation-free window did not last. NeoFreeBird confirmed that the checks are back, meaning third-party clients like NeoFreeBird and PikoTwitter are once again blocked from posting. Reports on r/Twitter back this up, with users saying attestation enforcement is active again as of today.

To me, it seems like the rollback was deliberate. As mentioned earlier in this article, X Lite on Android was also getting caught in the same net, with replies and quote posts failing there too. That now appears to be sorted. X Lite is working normally again, even as the restriction holds on third-party clients.

So the most likely read here is that X pulled the change back temporarily, patched whatever was causing X Lite to get swept up in the attestation check, and then pushed the enforcement out again

Original article published on March 9, 2026, follows:

If you were running into issues when trying to post on X in the past day or so, you were not the only one.

A wave of users said they suddenly could not post, reply, or quote posts, with many seeing the same failed to send post message again and again. The reports first picked up around third-party clients such as NeoFreeBird and PikoTwitter, after NeoFreeBird said X had implemented attestation for tweeting, and later appeared to roll the change back after backlash.

What made the whole thing more notable was that the issue did not seem limited to modified or alternate clients. Some users said the problem also hit X Lite on Android, which is part of the newer X app experience.

I ran into the same problem myself. When I tried replying to posts and quote posting from X Lite on Android last night, the app kept failing over and over. A screenshot shared on Reddit shows repeated ‘failed to send post’ alerts from the X app on Android across several attempts.

In the same thread on Reddit, users said they could still like posts and repost them, but could not publish their own posts or replies through the app. Some added that posting from a browser still worked. So it’s clear that this was an app-side or app-check issue rather than a basic account restriction (which I had initially feared).

There is also some recent history behind all this. X has already tightened attestation checks before, including earlier cases where users hit Attestation Denied login errors, and a later workaround involving password resets was also shut down, as we previously reported.

So while the issue now seems to be fixed, the bigger story is that this change briefly appears to have spilled beyond third-party apps and affected X’s own Android experience too. For users who were staring at failed to send post errors for hours, that rollback likely came as a relief.

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