Simple — Crypto Wallet & Finance API Integration

Standard package

• Protocol analysis report (endpoints, auth, anti-bot)
• OpenAPI / Swagger specification
• Runnable integration source (Node.js + example SDK)
• Webhook consumer and event replay utility
• Security & compliance checklist (KYC/AML guidance)

Example API — pseudocode

# POST /api/v1/simple/authenticate
# Request: exchange device-session for ACCESS_TOKEN
POST /api/v1/simple/authenticate
Content-Type: application/json
{
  'device_id': 'DEVICE_ABC123',
  'device_sig': 'BASE64SIG',
  'client_version': 'iOS-6.3.1'
}

Response: {
  'access_token': 'eyJhb...',
  'refresh_token': 'rt_xxx',
  'expires_in': 3600
}

# GET /api/v1/simple/wallet/balance
GET /api/v1/simple/wallet/balance
Authorization: Bearer 

Response: {
  'balances': [
    {'asset': 'BTC','available': 0.01234,'locked':0.0},
    {'asset': 'ETH','available': 0.45,'locked':0.05}
  ],
  'fetched_at': '2025-12-18T12:34:56Z'
}

# POST /api/v1/simple/trade/swap
POST /api/v1/simple/trade/swap
Authorization: Bearer 
{
  'from_asset':'USDC','to_asset':'SWEAT','amount':100.0,'slippage_pct':0.5
}

Response: {'order_id':'ORD123','status':'PENDING'}

Key scenarios we cover

Balance sync, buy/sell automation, fiat on/off ramp (card and bank rails), multi‑chain transfers, webhooks for confirmations, exportable transaction statements (CSV/Excel) and reconciliation tooling for accounting.

Compliance & Security

All integration work is performed using authorized access or publicly documented APIs. Where reverse engineering of client protocols is required for lawful integration, we document the flow and provide mitigation recommendations. We include KYC/AML mapping, consent capture, data minimization and secure key handling patterns.

Tech stack & delivery

• OpenAPI spec + Postman collection
• Node.js / Python / Go example services
• SDKs (JavaScript, Python) and CI test suite
• Deployment scripts for Docker / Kubernetes

How we work (workflow)

1. Submit target App name (you provided: app.simple.com) and business requirements.
2. Scope & feasibility (1-3 business days) — protocol analysis estimate.
3. Deliver prototype connectors & auth flows (3-10 business days).
4. Finalize SDKs, docs and testing (1-4 business days).
5. Optional extended support: gateway deployment, monitoring, and security review.

Common questions

What do you need from me?

Delivery time?

About our studio

We are a specialist technical service studio focused on app protocol analysis, authorized API integration and OpenFinance implementations. Our team has deep experience in mobile apps, fintech, crypto rails and banking integrations. We deliver compliant, auditable source code and documentation so you can deploy quickly and safely.

• Expertise: protocol analysis, OpenAPI, SDKs, webhooks
• Platforms: Android, iOS, backend services
• Compliance-first: privacy, KYC/AML guidance
• Transparent pricing: starter $300, pay on satisfaction option

Contact & Next Steps

Ready to start? Click below to send requirements or request a free scoping call.

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