You don't have to trust us, and you don't have to trust the developer either. Take any receipt, run the open verifier, and check the signature and Merkle proof yourself. The verifier is open-source, Apache-2.0, with zero dependencies. It checks the ES256 signature and the daily Merkle proof locally, in your browser or your terminal. Nothing phones home. One command, no account: npx @vextlabs/stoa-verifier ./receipt.json.
Every other audit log asks you to trust the company that wrote it. CloudTrail, Azure, and LangSmith all hand you the log and say trust us, it's accurate, where the verifier is the same party you'd have to trust. Stoa flips it. We hand you the math instead. You run it yourself, offline, with no trust required. A tampered receipt fails verification and reads Invalid; valid receipts read Verified. It is a public answer key, not a promise.
Stoa receipts are real and shipping today, signed with ES256 and anchored to a daily Merkle root, with the open-source offline verifier needing no account. When you are ready, Theron Pro is $20/mo and the verifier is free forever. Vext Labs is a frontier AI research lab in Maryland, founded by Annalea Layton, building toward a mind that doesn't forget and proving what it did with receipts anyone can check.
Run npx @vextlabs/stoa-verifier ./receipt.json. The open-source, Apache-2.0 verifier checks the ES256 signature and the daily Merkle proof locally, in your browser or terminal. No account is needed and nothing phones home.
No. The proof travels with the receipt and you run the math yourself, offline. Unlike audit logs from CloudTrail, Azure, or LangSmith, where the verifier is the same party you'd have to trust, Stoa hands you the answer key so no trust is required.
Verification fails and the receipt reads Invalid. Valid receipts read Verified. Because you check the ES256 signature and Merkle proof yourself, any change to a receipt is detectable without contacting us or the developer.
The open-source verifier is free forever. Theron Pro is $20/mo, flat, free to start, when you want receipts for your own app. There is no per-seat pricing.