BYDFi API integration services (Spot · Perpetuals · MoonX · OpenFinance)

Deliverables checklist

• OpenAPI 3.1 spec covering account, market, trading, copy-trade, and MoonX endpoints
• Protocol & auth report (HMAC-SHA256 signing, timestamp window, rate-limit table)
• Runnable source in Python and Node.js, including WebSocket reconnect logic
• Postman collection plus pytest / Jest harnesses with sandbox fixtures
• Compliance brief mapping flows to MiCA, FATF Travel Rule, and US MSB requirements
• Optional Docker image with a hosted gateway for pay-per-call billing

Engagement options

Choose either model based on your team's preferences — both produce the same technical artefacts; the difference is who runs the runtime.

• Source delivery from $300 — we hand over runnable Python/Node.js source plus docs; you self-host. Pay only after you've validated the deliverables.
• Pay-per-call API — call our hosted BYDFi gateway, settle monthly per request. No upfront cost; ideal for proof-of-concept or low-volume teams.

1. Multi-exchange portfolio & tax sync

An accounting platform pulls spot fills, perpetual realized PnL, and fiat on-ramp invoices from BYDFi every 15 minutes, normalizes them into a unified ledger, then pushes them to Koinly, CoinTracking, or an in-house ERP. The integration covers GET /v1/spot/orders, GET /v1/futures/income, and the on-ramp callback feed; OpenFinance framing means each row carries the originating provider, FX rate, and KYC reference required by tax authorities.

2. Real-time treasury & NAV for fund managers

A crypto fund manager streams BYDFi balance snapshots and perpetual mark prices over WebSocket, joins them with custody data from cold storage, and publishes a per-minute NAV to investors. The pipeline subscribes to account.update and position.update topics, validates against the REST GET /v1/account/wallet snapshot, and writes to a time-series store for daily attribution reports.

3. Copy-trading risk overlay

A regulated broker offers copy trading to retail clients but needs an independent risk view. We expose follower allocations, leader rosters, and mirrored fills as a webhook stream so the broker's risk engine can pre-trade check leverage caps, post-trade compute slippage versus the leader, and produce a fiduciary report each evening — all aligned with the broker's MiFID II suitability rules.

4. MoonX on-chain alpha pipeline

A trading team uses BYDFi's MoonX (launched April 2025 at Paris Blockchain Week) to scout early Solana memecoins. We pipe every MoonX fill — token mint, route, slippage, gas — into ClickHouse, joined with on-chain liquidity from Birdeye and DEX Screener. Their analysts query "winners in last 24h with < 5% slippage" without writing any RPC code.

5. BYDFi Card expense automation

A Web3 startup uses BYDFi Card for global team spend. We extract daily card statements, classify by MCC, attach the settlement-coin FX rate, and push to Brex / Ramp via their import API. Employees stop submitting manual expense reports; finance gets a single ledger that reconciles fiat settlement against on-chain debits.

Account login & HMAC signing

# Python — signed REST call to BYDFi
import time, hmac, hashlib, requests

API_KEY    = "<your_key>"
API_SECRET = b"<your_secret>"

def sign(payload: str) -> str:
    return hmac.new(API_SECRET, payload.encode(),
                    hashlib.sha256).hexdigest()

ts    = str(int(time.time() * 1000))
query = f"timestamp={ts}&recvWindow=5000"
sig   = sign(query)

r = requests.get(
    "https://api.bydfi.com/v1/account/wallet",
    params={"timestamp": ts, "recvWindow": 5000,
            "signature": sig},
    headers={"X-BYDFI-APIKEY": API_KEY},
    timeout=10,
)
print(r.json())

Statement export (spot orders)

// Node.js — paginated spot statement
POST /api/v1/bydfi/statement
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  "account_id": "u_8f21",
  "venue":      "spot",
  "symbol":     "BTCUSDT",
  "from_ts":    1735689600000,
  "to_ts":      1738368000000,
  "cursor":     null,
  "limit":      500
}

// Response (truncated)
{
  "rows": [
    {"order_id":"71e…","ts":1736021400123,
     "side":"BUY","price":"103245.10","qty":"0.0123",
     "fee":"0.00001230","fee_coin":"BTC","liquidity":"M"}
  ],
  "next_cursor": "eyJ0cyI6MTczNjAyMTQwMDEyM30=",
  "has_more": true
}

Position WebSocket + error handling

// WebSocket subscription with backoff
const ws = new WebSocket("wss://stream.bydfi.com/v1/private");

ws.on("open", () => ws.send(JSON.stringify({
  op: "subscribe",
  args: ["position.update", "account.update"],
  auth: { key: KEY, ts: Date.now(), sig: hmac() }
})));

ws.on("message", (raw) => {
  const msg = JSON.parse(raw);
  if (msg.code === 401)  return rotateKeyAndReconnect();
  if (msg.code === 1003) return throttle(msg.retry_after_ms);
  emit(msg.topic, msg.data);
});

ws.on("close", () => setTimeout(reconnect, backoff()));

MoonX on-chain fill webhook

# Inbound webhook payload (MoonX fill)
POST /your-endpoint/moonx
X-BYDFI-Signature: t=1736900000,v1=…

{
  "event":      "moonx.fill",
  "chain":      "solana",
  "wallet_ref": "moonx_acct_4f1",
  "tx_hash":    "5h7m…",
  "in_token":   "So111…So112",
  "out_token":  "JUP4F…wDr",
  "in_amount":  "1.250000000",
  "out_amount": "182.41",
  "route":      ["Jupiter v6"],
  "slippage_bps": 38,
  "gas_lamports": 50000
}

Regulatory framing

BYDFi itself operates under a US FinCEN MSB registration and a South Korea CODE VASP registration. Our integrations align downstream consumers with the same regimes plus the EU's MiCA framework and the FATF Travel Rule. For UK clients we map flows to the FCA's cryptoasset financial-promotion rules; for Singapore we follow MAS PS-N02 guidance on DPT services.

Privacy & key custody

We use the customer's own BYDFi API keys, scoped read-only by default. Keys never live in source control: they're injected from AWS Secrets Manager, GCP Secret Manager, or HashiCorp Vault. Personal data follows GDPR data-minimization — only fields the customer's business need actually requires are persisted, and withdrawal addresses are hashed when used for analytics.

About us

OpenFinance Lab is an independent studio focused on App interface integration and authorized API delivery. The team blends engineers from quantitative trading desks, payments processors, and mobile reverse-engineering backgrounds, with shipping experience across Android, iOS, and high-throughput backend systems.

• Centralized and decentralized exchange protocol analysis (CEX + DEX)
• OpenBanking-style gateway design with rate-limit shaping and retry policies
• Custom Python / Node.js / Go SDKs and pytest / Jest harnesses
• Compliance briefs aligned with MiCA, FATF Travel Rule, and US BSA/MSB regimes
• Source code delivery from $300 — runnable code plus docs; pay after acceptance
• Pay-per-call hosted gateway — no upfront cost, monthly settlement

Contact

Send us your target app, the data domains you need, and any sandbox credentials. We respond with a one-page scope and a fixed quote within one business day.

Contact page

Engagement workflow

1. Scope confirmation — which BYDFi domains (spot, perps, MoonX, Card) and which downstream system.
2. Protocol analysis & API design — 2 to 5 business days, deliverable is an OpenAPI spec.
3. Build & internal validation against BYDFi sandbox or read-only production keys — 3 to 8 business days.
4. Docs, samples, and Postman / pytest harnesses — 1 to 2 business days.
5. Typical first delivery: 5 to 15 business days. Real-time WebSocket pipelines and multi-tenant gateways are scoped separately.

FAQ

Do you use the official BYDFi developer API or reverse-engineer the mobile protocol?

Which BYDFi data types can you expose as APIs?

How long does a typical BYDFi integration take?

How do you handle compliance, privacy, and key management?