Rainbow Ethereum Wallet API integration (multi-chain & ENS)

1. Crypto tax & accounting sync

Rainbow already lets users download a CSV of their on-chain history for tax tools such as CoinLedger, but accounting teams that operate dozens of corporate or treasury wallets need that pipeline automated. We map every Rainbow-tracked address into a daily job that pulls transactions across all six supported chains, deduplicates internal transfers, applies cost-basis logic (FIFO/LIFO/spec-id), and writes journal entries straight into Xero, QuickBooks or NetSuite. OpenFinance maps cleanly here: the underlying objects are the same as a bank "statement" feed, just denominated in tokens.

2. Multi-chain portfolio analytics

For research and asset-management teams, the integration produces a unified balance sheet across mainnet, Optimism, Arbitrum, Polygon, Base and Zora — including positions discovered through Rainbow's Discover section. We ship a normalized schema (chain, contract, symbol, decimals, balance, USD value, source-tx) so downstream BI tools can chart exposure, drawdown and PnL without writing chain-specific code.

3. ENS-anchored CRM & loyalty

For Web3-native brands, the ENS profile is the new email address. Our connector resolves any Rainbow-active address into its primary ENS name, avatar, and verified social handles (X, GitHub, etc.), so CRM systems can match wallet activity to a known identity without storing personal data. Combined with the notification stream, marketing and loyalty teams can trigger drops or perks the moment a customer wallet hits a threshold.

4. NFT & crypto-art showcase

Rainbow's strong digital-art support — 3D, AR, video, audio, ERC-721, ERC-1155 and POAPs — is exposed through a single endpoint that returns rendered media URIs and Foundation/OpenSea/Rarible/Zora marketplace context. Galleries, ticketing platforms and OTT media products use this to embed verified collections without reinventing IPFS pipelines.

5. Travel Rule & AML reporting

For VASPs (custodial exchanges, brokers, payment institutions) that interact with Rainbow self-custody wallets, the integration emits Travel-Rule-compatible payloads when transfers cross the EU MiCA / Transfer of Funds Regulation thresholds. Each outbound transfer can be enriched with on-chain provenance and counterparty risk scoring before it reaches the bank rail.

Endpoint A — Multi-chain statement export

POST /api/v1/rainbow/statement
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  "address": "vitalik.eth",
  "chains": ["mainnet", "optimism", "arbitrum", "polygon", "base", "zora"],
  "from_date": "2026-04-01",
  "to_date":   "2026-04-30",
  "include":   ["transfers", "swaps", "bridges", "nft_mints"],
  "format":    "json"
}

200 OK
{
  "address":      "0xd8dA...96045",
  "ens":          "vitalik.eth",
  "page":         1,
  "page_size":    100,
  "total_count":  482,
  "items": [
    {
      "tx_hash":   "0x9c1f...7af",
      "chain":     "base",
      "timestamp": "2026-04-12T08:21:03Z",
      "type":      "swap",
      "from":      "0xd8dA...96045",
      "to":        "0x111111...DEF1",
      "asset_in":  {"symbol":"ETH","amount":"0.5"},
      "asset_out": {"symbol":"USDC","amount":"1750.42"},
      "gas_usd":   "0.18",
      "flashbots_protected": true
    }
  ]
}

Endpoint B — Wallet snapshot & ENS profile

GET /api/v1/rainbow/wallet/0xd8dA...96045
Authorization: Bearer <ACCESS_TOKEN>

200 OK
{
  "address": "0xd8dA...96045",
  "ens": {
    "name":   "vitalik.eth",
    "avatar": "ipfs://Qm...",
    "social": {"twitter":"VitalikButerin","github":"vbuterin"}
  },
  "balances": [
    {"chain":"mainnet","symbol":"ETH","amount":"12.41","usd":"38214.56"},
    {"chain":"base",   "symbol":"USDC","amount":"4200.00","usd":"4200.00"}
  ],
  "nft_summary": {
    "collections": 38,
    "items":       127,
    "marketplaces": ["zora","opensea","foundation","rarible"]
  },
  "rnbw_points": 12450
}

Endpoint C — Activity webhook (real-time notifications)

POST https://your-host.example.com/webhooks/rainbow
X-OFL-Signature: t=1714800000,v1=ab12...cd34

{
  "event":     "wallet.activity",
  "address":   "0xabcd...1234",
  "chain":     "optimism",
  "kind":      "erc20.transfer",
  "tx_hash":   "0xfeed...beef",
  "asset":     {"symbol":"OP","amount":"125.0"},
  "direction": "outgoing",
  "timestamp": "2026-05-04T11:02:55Z"
}

# Verify with HMAC-SHA256 over (timestamp + "." + body)
# Reject if |now - timestamp| > 300s, then ack with HTTP 200.

Compliance & privacy

Self-custody data still has compliance gravity. EU deployments align with MiCA and the EBA Transfer of Funds Regulation guidelines — the Travel Rule has been in full force across the EU since 30 December 2024 and applies to every transfer between a CASP and a self-hosted wallet without minimum threshold. US deployments follow FinCEN guidance; UK clients track the FCA crypto regime. We never request seed phrases, never persist private keys, log only minimum necessary data, and document a clear retention policy per integration.

Market positioning & user profile

Rainbow positions itself as a design-led, open-source self-custody wallet aimed at retail crypto users, NFT collectors and Ethereum-native power users — distinct from custodial venues such as Coinbase. According to industry coverage, Rainbow collected approximately $833,625 in fees during Q3 2025 (an annualized run-rate near $3M), with strong traction in North America and Western Europe, primarily on iOS and Android with a Chrome browser extension. The Q4 2025 launch of the RNBW token and the conversion of Rainbow Points expand the integration surface for analytics and compliance vendors.

Deliverables checklist

• API specification (OpenAPI 3.1 / Swagger)
• Protocol & auth-flow report (RPC, Etherscan-class indexer, WalletConnect session capture)
• Runnable source for statement, wallet-snapshot, NFT and webhook endpoints (Python / Node.js / Go)
• Automated tests, replay fixtures and a Postman collection
• Compliance guidance pack (MiCA / Travel Rule / GDPR data-subject rights)
• Operational runbook: chain reorg handling, RPC fallback, rate-limit tuning

Engagement workflow

1. Scope confirmation — wallets, chains and data types in scope.
2. Protocol analysis & API design (2–5 business days)
3. Build & internal validation against live testnet/mainnet (3–8 business days)
4. Docs, samples and acceptance test pass (1–2 business days)
5. First delivery typically 5–15 business days; complex multi-tenant or compliance-heavy stacks may take longer.

About us

OpenFinance Lab is an independent studio focused on fintech and Web3 data integration. Our team includes engineers who have shipped at exchanges, payment processors, on-chain analytics vendors and indexers. We know how Ethereum mainnet, the major L2s, ENS and Flashbots Protect actually behave under load — and how regulators want that data described.

• Self-custody & custodial wallet integrations across EVM, Solana and Bitcoin
• Tax & accounting connectors (Xero, QuickBooks, NetSuite, ERP)
• NFT and crypto-art metadata pipelines (IPFS, Arweave, marketplaces)
• MiCA / Travel Rule / GDPR documentation packs
• Source code delivery from $300 — runnable API source and full documentation; pay after delivery upon satisfaction
• Pay-per-call API billing — access our hosted endpoints and pay only per call, no upfront cost

Contact

For quotes, scoping calls or to submit your target wallet list and integration requirements, open our contact page:

Contact page

FAQ

What do you need from me to integrate Rainbow Wallet data?

How long does delivery take for a Rainbow Wallet integration?

How do you handle compliance for self-custody wallet data?

Can you support the new RNBW token and Rainbow Points data?

Why teams pick this integration

• Six EVM chains in one normalized schema, not six chain-specific scripts.
• Watch-only mode means no custody risk and no friction with security review.
• Decoded swap, bridge and Flashbots-Protect events out of the box.
• NFT, POAP and ENS enrichment included — no second vendor needed.
• Compliance docs ready for MiCA, Travel Rule and GDPR deployments.