The system of record for AI agents

Prove what your agents knew and did.

As agents write code, move money, and touch production, one question decides whether you can trust them: can you prove what happened? The Vault is a tamper-evident record of every fact an agent recalled and every action it took — one timeline, hash-chained, owned by you, across every model.

Open the Vault — free Read the docs

record one actionPOST /api/ingest

$ curl -X POST https://vouchstone.dev/api/ingest \
   -H "Authorization: Bearer vk_live_…" \
   -d '{ "agent":"deploy-bot", "type":"did",
         "action":"db.migrate", "status":"ok",
         "summary":"applied 20260703_004 to prod" }'

  ← { "ok": true, "recorded": [
       { "seq": 4127, "type": "did",
         "hash": "9f2a1c…" } ] }

The Vault

One timeline for everything an agent knew and did.

Every recall and every action lands in an append-only, hash-chained ledger. Nothing can be edited or removed after the fact without the chain breaking — and the break points to the exact event. That’s the difference between a log and a record.

Know

What it recalled

The memories and context an agent pulled before it acted — so a bad action is traceable to the knowledge behind it.

Did

What it executed

Every tool call and side effect, with status: ok, blocked, or flagged. The dangerous ones stand out.

Provable

Tamper-evident

A SHA-256 chain from genesis. Re-verify the whole ledger in one click; any alteration is caught and located.

How it works

Three moves.

Send events

One HTTP call, or drop in the recorder. Your agent reports what it knew and what it did as it works.

Watch the timeline

The Vault dashboard shows a live, filterable feed per agent — KPIs, activity over time, blocked actions.

Prove it

Re-verify the hash chain any time. Export the record. Answer “what did the agent do?” with evidence, not a hunch.

Ecosystem

Open front doors, one governed record underneath.

vouchstone is the company behind three independent, open tools. Use any of them on its own — or feed them into the Vault for the full picture.

What they know

Start recording what your agents do.

Free to start. One API call to your first proof.

Open the Vault Read the docs