Brex — venture-banking and corporate cards, plus the crypto books
Brex serves US venture-backed startups with banking, cards, and expense management. We reconcile Brex activity with crypto treasury.
Brex is the venture-banking choice for many US Web3 startups — operating accounts, treasury, corporate cards, and expense management in one platform. The integration ingests Brex activity via the official API, classifies expense and revenue events, and reconciles fiat-side activity with on-chain crypto treasury.
What the Brex integration does
Banking + card + expense ingest
All three product surfaces under one API key.
Expense classification
Card transactions auto-classified per Brex category, mapped to the GL.
Treasury reconciliation
Brex Treasury T-bill yield reconciled against the GL account.
The connection in 4 steps
Authorize Wag3s via Brex OAuth
In the Brex dashboard, authorize the Wag3s OAuth application. Wag3s requests read-only access to transactions, accounts, and statements. No card issuance or payment permissions are requested.
Brex accounts, cards, and Treasury discovered automatically
Wag3s enumerates all Brex cash accounts, corporate card accounts, and Brex Treasury positions under the authorized connection.
Expense transactions classified and mapped to GL
Card transactions are auto-classified using Brex's merchant categories and mapped to the GL accounts you configure. Rules persist and apply to future transactions.
Fiat ↔ crypto treasury reconciliation
Fiat inflows from crypto liquidations and outflows to on-chain addresses are matched between Brex and the corresponding crypto wallet event, closing the fiat-to-crypto loop.
Common configurations
Startup uses Brex for USD operating expenses (payroll, SaaS, travel) and holds ETH and USDC on-chain. Finance team needs a single workspace where Brex expenses reconcile against the crypto treasury. Wag3s shows the full picture — Brex on the fiat side, wallets on the crypto side — in one GL.
Company parks USD in Brex Treasury (T-bill yield product) between payroll runs. The CFO wants monthly yield income booked and the T-bill position marked on the balance sheet. Wag3s ingests Brex Treasury activity and posts the interest income JE alongside the crypto yield from DeFi positions.
Brex integration questions
Does the Brex integration support multiple Brex accounts or sub-entities?
Yes. Multiple Brex cash accounts and card programs under the same Brex organization are ingested. For multi-entity setups, each Brex account maps to the appropriate Wag3s entity and GL.
How are Brex rewards points or cashback handled?
Brex cashback and rewards are not monetary income in most jurisdictions until redeemed. Wag3s tracks redemption events and flags them for your accountant to classify per local tax treatment.
Can Wag3s reconcile a crypto-to-Brex funding flow?
Yes. A typical flow is: stablecoin sold on an exchange, USD wired to Brex operating account. Wag3s links the on-chain sell event (realized gain booked) to the Brex deposit, so both sides of the conversion are captured in the same audit trail.
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Connect Brex in minutes
Free during Alpha. No credit card. Native sync, audit trail, no spreadsheets.