Guardian Labs

Public authenticity for the money

Guardian Labs builds public trust infrastructure over the keys that move payments in the country — immutable, auditable proof that a charge is legitimate, without relying only on the issuer or the bank.

View products Contact
Stellar On-chain Non-custodial LGPD API for ERPs

Products

Four products, one thesis: prove the origin

Each Guardian Labs product makes a payment instrument verifiable before money moves. Choose where to start.

In Mainnet

Boleto Guardian

Bank-slip authenticity

The company registers each bank slip on the Stellar blockchain. The payer validates in seconds with the 44 to 48 barcode digits — no app, no sign-up, no technical jargon.

  • Public, immutable and auditable proof of every issued slip
  • Zero-friction validation: the slip is its own lookup credential
  • Native registration via Manage Data — no smart contracts
  • No personal data on-chain (LGPD compliant)
Access Seal Learn more
In Testnet

PayOrder W3 Guardian

Web3 billing rail

Turns digital charges from any source into payment orders verifiable on-chain. Before paying, the user sees who will receive, the amount and the on-chain proof.

  • The destination wallet is never typed — it is pulled from the payee's record
  • Eliminates manual errors and phishing / man-in-the-middle fraud
  • Non-custodial payment: the user's seed never touches the backend
  • Public, immutable proof that the charge is legitimate
Open PayOrder W3 Learn more
Testnet PoC

Guardian402

Pay-per-use boleto verification

A pay-per-use API that checks whether boleto data — from any ERP, billing system or AI agent — matches an integrity proof registered on Soroban. The caller pays 0.01 USDC per call via x402. No API key, no subscription.

  • Pay-per-use through x402: HTTP 402, 0.01 USDC per verification
  • ERP-agnostic — TOTVS Protheus is only the reference case
  • Four unambiguous outcomes: AUTHENTIC, MISMATCH, NOT_FOUND, REVOKED
  • Integrity proof held in a Soroban contract on Stellar Testnet
View Guardian402 Learn more
Testnet PoC

Guardian PrivateReceivable

Permissioned tokenized receivable

Tokenizes an enterprise receivable as a permissioned RWA token on Stellar Testnet. Identity and compliance contracts decide who may receive, hold or transfer it — the compliance officer verifies wallets, freezes accounts, pauses the asset and settles on demand.

  • Every mint and transfer runs through the same enforcement chain
  • A wallet only operates once it is Verified in the identity-verifier contract
  • Freezing a wallet, pausing the token or settling the receivable blocks the operation
  • Three Soroban contracts: identity-verifier, compliance-policy, receivable-rwa
View Guardian Private Receivable Learn more

The Guardian Labs thesis

Before money moves, the payment request proves its origin. Boleto Guardian, PayOrder W3, Guardian402 and PrivateReceivable apply this thesis to different payment instruments — from the bank slip to the tokenized receivable — through public, auditable verification.

Guardian Labs: Cleverson Silva (CEO) · Sergio Artero (CTO) · Demetrio De Los Rios (CMO)