Receipts you can defend.
Tax Sorter captures merchant receipts in your browser and signs each one as cryptographic evidence — ML-DSA-65 post-quantum signature plus an Ed25519 co-signature. Built for small businesses, freelancers, and CPAs who need a paper trail an auditor cannot wave away.
One click. One receipt. One signed envelope.
When you confirm a purchase on a merchant page, Tax Sorter captures the receipt locally, sends it to the Hive receipt rail for dual-signature, and stores the signed envelope in your browser. The merchant sees nothing. Your CPA sees a verifiable export.
Capture
You click a receipt on a merchant page. Tax Sorter reads the visible page data and asks for confirmation before anything is signed.
Sign
The receipt is sent to hivemorph.onrender.com/v1/receipt/free for ML-DSA-65 + Ed25519 dual-signature. Returned as a signed envelope.
Store
The signed envelope lives in your browser storage. Nothing is uploaded to a Hive-controlled database. You hold the evidence.
Export
Export to CSV, JSON, or a CPA-ready format any time. Every row carries its signature hash. Auditors verify against the public Hive verifier.
The data model.
Tax Sorter is built on a "minimum necessary" rule. It reads only what is needed to sign a receipt, and only when you ask it to.
One Chrome permission
Only storage. No tabs, no history, no clipboard, no identity.
Financial info only
Receipt amount, merchant, date. No names, no addresses, no card numbers, no health info. No analytics. No sale. No transfer for credit reasons.
What a signed receipt looks like.
Every captured receipt becomes an envelope with two signatures: ML-DSA-65 (NIST FIPS 204, post-quantum) and Ed25519 (classical). Both must verify for the envelope to count as evidence.
How to get it.
Tax Sorter is filed for Chrome Web Store review. Once published, the public install link will appear here. For early-access invitations, write to [email protected] with your Gmail address and use case.
- Chrome 120 or later
- Sign-in to a Google account that has Chrome sync
- One-click install — Tax Sorter does not require any account or sign-up
- Free tier captures up to 100 receipts per month; paid tier removes the cap and adds CPA-export presets
Read the larger rail.
Tax Sorter is one surface on the Hive receipt rail. The same rail signs agent-to-agent payments, enterprise procurement evidence, and regulated workflows. Read the platform if you want to see how the architecture composes.