Etch

Etch

Every AI agent decision, signed and offline-verifiable

saravananjaichandar
@saravananjaichandar
Published on Sep 20, 2026
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Freemium from $29
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About Etch

Etch is a signed audit chain that captures every AI agent decision as a tamper-evident event: prompt, context, tools called, outcome. When production breaks, replay the exact chain. When a regulator or auditor asks six months later, verify the same record offline against pinned public keys with no dependency on Etch staying online. Events are signed with a hybrid Ed25519 + FIPS 205 SLH-DSA-SHA2-128f envelope, Merkle-chained into epochs, and anchored to Sigstore Rekor and Bitcoin OpenTimestamps. Free tier, MCP-native, works with any agent stack.

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Comments (2)

tibi
@tibi

Cool product, will try the anon tier!

saravananjaichandar
@saravananjaichandar

Founder here. Free to try, no signup, no card. curl -X POST https://etch.systems/v1/your-project returns a bearer + MCP endpoint. 500 signed events free on the anon tier.