MARA Launches Public Access to Slipstream as Coldcard Security Crisis Unfolds
TL;DR:
- MARA enabled public and permissionless access to its Slipstream direct transaction submission service.
- Galaxy Research analysts reported the theft of 1,082.65 BTC across 1,196 addresses associated with Coldcard devices on July 30, 2026.
- The service allows processing transactions directly with miners without exposing operations in the public Bitcoin network mempool.
Mining company MARA Holdings enabled public access to its MARA Slipstream platform without the need for client software in early August 2026. The move is presented as a technical alternative for users affected by the recent security flaw in Coldcard wallets to execute the migration of their assets directly to miners.
@MARA Slipstream is now available as a permissionless public good with no client code requirement.
Please be careful and conservative with fees to avoid transactions getting stuck in the Slipstream mempool in the event that competitive rates spike.
For the foreseeable…
- MARA Foundation (@MARAFoundation_) August 3, 2026
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