> For the complete documentation index, see [llms.txt](https://docs.circuitsecurity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.circuitsecurity.com/readme.md).

# Welcome

Circuit protects the keys you hold and the assets they control. Three products cover the lifecycle: on-demand recovery, automatic response, and encrypted online key backup.

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Recovery</strong></td><td>On-demand asset recovery. When you decide to move assets to safety (key loss, compromise, planned migration), Circuit broadcasts a pre-signed transaction without needing key access.</td><td><a href="/pages/i8e8enoHcMMmzppnMIWm">/pages/i8e8enoHcMMmzppnMIWm</a></td></tr><tr><td><strong>Response</strong></td><td>Automatic threat response. Circuit watches the mempool; if a non-whitelisted transaction appears from a protected wallet, the pre-signed recovery fires in seconds.</td><td><a href="/pages/o1ycgTVEjWByiZ4TgbSh">/pages/o1ycgTVEjWByiZ4TgbSh</a></td></tr><tr><td><strong>Key Backup</strong></td><td>Offline encryption, online storage. An air-gapped SDK encrypts your secrets; the Circuit platform stores the envelopes and can't decrypt them.</td><td><a href="/pages/WlHdNplP3YUSLC0pCaKA">/pages/WlHdNplP3YUSLC0pCaKA</a></td></tr></tbody></table>

### Quick links

<table data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Quickstart</strong></td><td>Connect a Fireblocks sandbox and run a test recovery in under 15 minutes.</td><td><a href="/pages/mtU35VUtuUGlsW7zHHHR">/pages/mtU35VUtuUGlsW7zHHHR</a></td></tr><tr><td><strong>API Reference</strong></td><td>Endpoints for wallets, backups, approvals, and whitelists.</td><td><a href="/pages/R6kY0C8TZ03DdhrdAJO7">/pages/R6kY0C8TZ03DdhrdAJO7</a></td></tr><tr><td><strong>Wallet providers</strong></td><td>Fireblocks, DFNS, Turnkey, Fordefi. Setup steps per provider.</td><td><a href="/pages/VJzUVcp9CrCrbQwMOjKu">/pages/VJzUVcp9CrCrbQwMOjKu</a></td></tr></tbody></table>

### New here?

Start with [Who Are Circuit?](/introduction/who-are-circuit.md) for the one-pager on all three products. [How Recovery Works](/recovery/how-recovery-works.md), [How Response Works](/response/how-response-works.md), and [How Key Backup Works](/key-backup/how-key-backup-works.md) dive into each.

### Need support?

Reach us at <support@circuitsecurity.com>. For security issues: <security@circuitsecurity.com>.


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