toluTag

toluTag connects the physical world to the blockchain. Each toluTag is an NFC tag built around an NXP SE05x secure element that holds its own secp256k1 key, so a real object can carry a blockchain identity you can prove on-chain. With toluTag you provision that key, read the tag's public identity, and sign cryptographic proofs that smart contracts on Ethereum, Base, and other EVM chains can verify. It is the bridge between a physical item and Web3. Built for makers, brands, and developers bringing real-world objects on-chain. WHAT YOU CAN DO • Create keys: generate a secp256k1 key pair on a tag, with an optional PIN, and view its Ethereum address. Every tag becomes its own on-chain identity. • Sign a message: produce an EIP-191 signature (r, s, v) with the tag's key, so a contract or backend can verify the tag signed it. • Sign typed data: sign any EIP-712 (eth_signTypedData_v4) document for structured, on-chain verifiable proofs. The digest is computed on device and v is recovered, not assumed. • Scan a tag: read full chip details, including unique ID, public key, and Ethereum address, plus type, size, origin and policy for every object. • Write and read text: store data on a tag and read it back to verify. • Delete objects: remove an object from a tag, with PIN support for protected slots. • Collect tags: scan many tags into an address list and export it as JSON for minting, allowlists, or on-chain registration. CONNECTING THE REAL WORLD TO BLOCKCHAIN Because every tag signs with a key that never leaves its secure element, the proofs it produces are trustworthy and verifiable by anyone on-chain. Use toluTag for product authenticity, provenance, phygital drops, access, and any experience that links a physical object to a blockchain. TAG RECORDS Save the keys and identities you create as records, filter them by card, and give each physical tag a name. Records are protected behind Face ID and stored only on your device. PRIVATE BY DESIGN toluTag has no accounts and no servers, and never sends your data anywhere. Keys, PINs, and records live in the iOS Keychain, encrypted on your device, so only you can view them. Every cryptographic operation runs locally, on your phone and on the tag. toluTag produces signatures and identities for on-chain verification. It does not hold funds or broadcast transactions on your behalf. developed by mwbp.io, connecting blockchain to the world