Taxr

Property tax collection modernized.

Pay with crypto or card. Receipts are NFTs. Reconciliation is instant.

For Taxpayers

Look up your parcel on the map, see what you owe, pay with USDC, ETH, or card. Every payment mints a verifiable receipt NFT on Base L2 — your proof of payment, forever.

For Sheriffs

Ingest tax rolls from CSV. Track collections in real-time. Export reconciliation reports for the treasurer. Every payment — crypto or fiat — is recorded on-chain with a commitment hash.

For Counties

Each county gets its own tenant: dedicated database, PostGIS-powered parcel map, 16 MCP tools for AI agents, and smart contract integration on Base L2. Deploy in an afternoon.

Pilot County

McCracken County, KY

35,219 parcels · 33,317 tax bills · 16 MCP tools · PostGIS parcel map · On-chain receipts

Bill lifecycle

1.Ingest — Sheriff uploads CSV tax roll

2.Commit — Bills hashed and committed on-chain

3.Pay — Taxpayer pays via USDC, ETH, or card

4.Receipt — ERC-1155 receipt NFT minted

5.Settle — Bill marked settled on full payment

6.Reconcile — Treasurer report generated, CSV exported

Built on Base L2

7 Solidity contracts. ERC-1155 receipt NFTs. EIP-712 fiat attestations. USDC and ETH payments routed through on-chain settlement. No PII on-chain — only commitment hashes.