Developers

Build with
BroLabel.

API-first infrastructure. Ed25519 authentication. Sandbox-ready with testnet tokens. Ship crypto products in days, not months.

Open Sandbox →Read API Docs

REST + WebSocketEd25519 authSandbox pre-fundedOpenAPI spec

api.brolabel.io · sandbox

# Create a wallet in seconds
POST  /v1/wallets
Authorization:  Ed25519 {signature}

{
  "blockchain": "ETH",
  "label": "my-first-wallet"
}

// Response 201
{
  "id": "w_9f3k2...",
  "address": "0x1a2b3c...",
  "blockchain": "ETH",
  "status": "active"
}

Quick Start

Live in 3 steps.

🔐

Generate Ed25519 key pair

Create your Ed25519 key pair in the admin console. Download the public key — BroLabel stores it, your private key never leaves your server.

# Generate key pair
openssl genpkey -algorithm ed25519 \
  -out private_key.pem
openssl pkey -in private_key.pem \
  -pubout -out public_key.pem

💼

Create your first wallet

Call POST /v1/wallets with blockchain and label. Wallet is provisioned in milliseconds — ready to receive deposits immediately.

curl -X POST \
  https://api.brolabel.io/v1/wallets \
  -H "Authorization: Ed25519 {sig}"\
  -d '{ "blockchain": "ETH" }'

⚡

Subscribe to events

Connect to the WebSocket endpoint. Receive real-time events for deposits, withdrawals, confirmations, and AML alerts — no polling required.

wss://api.brolabel.io/v1/events
// Streams in real time:
← "deposit.confirmed"  { amount, wallet_id }
← "withdrawal.completed"{ tx_hash, fee }
← "aml.flagged"       { wallet_id, reason }

Code Examples

Copy, paste, ship.

# Create a wallet
curl -X POST \
  https://api.brolabel.io/v1/wallets \
  -H "Authorization: Ed25519 {signature}" \
  -H "Content-Type: application/json"  \
  -d '{
    "blockchain": "ETH",
    "label": "user-wallet-001"
}'

API Highlights

Designed for production.

🔐

Ed25519 per-request signing

Every request signed with your Ed25519 private key — asymmetric, per-request. No shared secrets, no API keys in plaintext.

🛡️

IP whitelisting + replay protection

Lock down API access to your server IPs. Nonce-based replay protection ensures each signed request can only be used once.

⚡

REST + WebSocket

Synchronous REST for wallet and transaction operations. Real-time WebSocket for deposit confirmations, withdrawals, and AML alerts.

👤

5 RBAC roles

Owner, Admin, Operator, Reader, Service — enforce separation of duties at the API level. Map roles to your org structure.

🏖️

Sandbox with pre-funded testnet

Full sandbox environment with testnet tokens pre-loaded. Test every flow — deposits, withdrawals, fees, events — before going live.

SDKs & Tools

Everything you need to integrate.

📦

Official SDKs

Available

Python, Node.js, Go — idiomatic clients with full type safety and automatic Ed25519 signing.

📬

Postman Collection

Download

Pre-built Postman workspace with all API endpoints, example requests, and environment variables.

📄

OpenAPI Spec

Download

Full OpenAPI 3.1 specification. Auto-generate clients in any language using openapi-generator.

🔔

Webhook Testing

Sandbox

Built-in webhook tester in the sandbox console — inspect payloads, retry events, and debug your handlers.

Security First

The most secure API auth in the space.

Ed25519 asymmetric signing per request — no shared secrets, no long-lived tokens. Each request is cryptographically unique and can't be replayed.

Provider

Auth Method

Replay Protection

Shared Secrets

USBroLabel

Ed25519 asymmetric per-request

✓ Nonce-based

✓ None

Fireblocks

API key + JWT (1hr sessions)

Partial

✗ API key in headers

Utila

JWT token (hour-long sessions)

✗

✗ JWT bearer token

Safeheron

RSA + Hardware token required

✓

✗ Hardware dependency

Fystack

Shared secret HMAC

✗

✗ Shared secret

Verified client results

Real numbers from real clients — no cherry-picking, no rounding.

$142k/mo profit · zero tech staff

“I'm not technical at all. All I had was an idea and a Telegram channel with 18k followers. One-time fixed payment + 45 days later → fully functional neobank with cards, wallets, and fiat on/off ramps. Today: 9,200 active cards, ~$19 ARPU, roughly $142k net profit per month. Tech headcount on my side: zero. BroLabel genuinely lets one guy with a laptop compete against 50-person teams.”

$400k/mo revenue · 19 days to launch

“We went live with fully branded crypto cards and an OTC desk in just 19 days. Before BroLabel, we burned 6 months with two Indian outsourcing teams — nothing but bugs and "10 TPS throughput". Here we got SOC 2 compliance, $150k+ limits per card, and zero slippage liquidity even on $2–3M trades. First month after launch: $187k net profit from cards alone. Now we're approaching $400k/month — still zero developers on our payroll.”

$60M monthly volume · zero incidents

“We were hunting for a true Fireblocks + in-house custody replacement. BroLabel delivered MPC + HSM-grade security, built-in Travel Rule, and sanctions screening — all for a one-time fixed fee. In 28 days we migrated every cold wallet and launched a white-label OTC desk with direct books from 30+ Tier-1 brokers. We're now doing $35–60M monthly volume at 0.35–0.6% margin. Zero devops headcount, zero incidents in 7 months.”

Get Started

Questions? Talk to an engineer.

Our integration team has shipped 40+ crypto products. Book a technical call and get answers to your specific architecture questions.

Book Technical Call Open Sandbox →

Build withBroLabel.