MercantilMercantil PayEx
Developers

Infrastructure you can build on.

A clean, idempotent REST API with signed webhooks and base-unit money handling. Production-ready from day one.

Developers

An API built for financial engineers.

Idempotent endpoints, signed webhooks, base-unit money handling and a fully documented OpenAPI surface. Integrate treasury, payroll and settlement in days, not quarters.

REST API Typed SDKs Webhooks OpenAPI
Read the documentation
treasury.sh
# Create a USDC payout from treasury
curl -X POST https://api.mercantilpayex.io/api/withdrawals \
  -H "Authorization: Bearer $TOKEN" \
  -H "Idempotency-Key: 7f3c…" \
  -d {"asset":"USDC","amount":"250000","to":"0xCD98…A2CD"}

# → 202 Accepted
{ "id": "wd_01J…", "status": "screening" }

Core endpoints

POST/api/auth/loginAuthenticate and receive a JWT
GET/api/treasury/balancesMulti-asset treasury balances
POST/api/payrollCreate a payroll batch
POST/api/withdrawalsInitiate a payout (idempotent)
GET/api/ledgerQuery the append-only ledger
POST/api/webhooks/alchemy/address-activityDeposit detection (signed)

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