Wallet Verse API integration services (DeFi / OpenFinance)

Deliverables checklist

• OpenAPI 3.1 specification for every endpoint (balances, transactions, swaps, NFTs, staking)
• Protocol and auth flow report (mnemonic-derived key handling, WalletConnect v2, RPC selection)
• Runnable source code in Python (FastAPI) and Node.js (Express/Fastify) — buyer keeps the code
• Indexer adapters for Etherscan-family explorers, Solscan, Tronscan, XRPL clio and Bitcoin Core RPC
• Automated test suite (pytest + Jest), recorded fixtures, and Postman/Bruno collection
• Compliance brief: FATF Travel Rule mapping, AML risk-tagging hooks, GDPR retention notes

Engagement models

• Source code delivery from $300 — fixed-price drop of runnable code plus docs; pay after delivery once you have validated the output against your test wallets.
• Pay-per-call hosted API — we run the indexers and key-derivation in our infrastructure, and you pay per call with no upfront fee. Useful for teams that want a one-week proof of value before committing to a self-hosted build.
• Hybrid — start on the hosted endpoint, then migrate to your own infrastructure once volumes justify it; we hand over the same image we run.

1. Crypto-native accounting platform

Context: a Web3 accounting SaaS needs to onboard customers who keep their working capital in Wallet Verse rather than on a centralized exchange.

Data & API: nightly pull of /balances, /transactions and /swaps per wallet address; deduplicated against on-chain re-orgs; cost-basis fields filled from on-ramp receipts.

OpenFinance mapping: the customer signs a one-time consent message; we treat the wallet address as the equivalent of a bank account number under PSD2-style "account information service" semantics, with read-only scope.

2. AML monitoring for a regulated VASP

Context: a licensed Virtual Asset Service Provider must screen counterparty wallets when its users move funds in or out of Wallet Verse.

Data & API: webhook on every confirmed transfer; payload includes counterparty address, AML risk score (Chainalysis-style tagging hook), and Travel Rule fields when the counterparty resolves to a known VASP.

OpenFinance mapping: implements the FATF Travel Rule originator/beneficiary requirement, mapped onto IVMS 101 message fields.

3. Tax reporting for retail users

Context: a tax-prep app supports users with both centralized exchange accounts and Wallet Verse holdings.

Data & API: annualized export of /swaps, /transactions and staking /rewards as CSV and FIFO/LIFO-ready JSON; per-jurisdiction cost-basis logic applied at our layer.

OpenFinance mapping: output aligns with IRS Form 1099-DA (US) and HMRC Self Assessment crypto-asset fields (UK).

4. Treasury & portfolio dashboard for a DAO

Context: a DAO manages a multisig that also operates Wallet Verse hot wallets for ops payments and grants.

Data & API: real-time /balances snapshots; /swaps for DEX rebalancing; /nft inventory for protocol-owned collectibles. Streamed into Grafana or Dune-style dashboards.

OpenFinance mapping: follows OpenBanking-style "balance + transactions" endpoints, extended with on-chain native fields (gas, route, block height).

5. Loyalty & NFT-gated commerce

Context: a merchant grants discounts to holders of the in-app Hamster NFTs (earned by completing quests in Wallet Verse).

Data & API: read-only /nft/holdings endpoint with contract whitelist; checkout integration verifies ownership at order time.

OpenFinance mapping: treats NFT ownership as an identity assertion, with consent recorded per checkout session.

Balance query (multi-chain)

POST /api/v1/walletverse/balances
Content-Type: application/json
Authorization: Bearer <ACCESS_TOKEN>

{
  "wallet_id": "wv-9f3c-...-2a",
  "addresses": [
    {"chain": "ethereum",  "address": "0x9b..."},
    {"chain": "bitcoin",   "address": "bc1q..."},
    {"chain": "solana",    "address": "FZ8...j7"},
    {"chain": "tron",      "address": "TJR..."}
  ],
  "include": ["spam_filter", "usd_value", "24h_change"]
}

200 OK
{
  "as_of": "2026-05-11T09:15:04Z",
  "items": [
    {"chain":"ethereum","token":"USDT","balance":"412.55","usd":412.59},
    {"chain":"solana",  "token":"SOL", "balance":"3.4801","usd":548.12},
    {"chain":"bitcoin", "token":"BTC", "balance":"0.01902","usd":1284.73}
  ],
  "total_usd": 2245.44
}

Swap and on-ramp history

GET /api/v1/walletverse/orders?
   wallet_id=wv-9f3c-...-2a
  &from=2025-05-01
  &to=2026-05-01
  &type=swap,onramp

200 OK
{
  "orders": [
    {
      "id":"sw_8a12",
      "type":"swap",
      "venue":"1inch",
      "in":  {"token":"USDC","amount":"500.00","chain":"ethereum"},
      "out": {"token":"WETH","amount":"0.1742","chain":"ethereum"},
      "fee_usd": 1.84,
      "tx_hash":"0xab..",
      "ts":"2026-04-19T14:22:01Z"
    },
    {
      "id":"or_3f91",
      "type":"onramp",
      "provider":"MoonPay",
      "fiat":  {"currency":"EUR","amount":"200.00"},
      "crypto":{"token":"BTC","amount":"0.00295","chain":"bitcoin"},
      "kyc_ref":"mp_kyc_91x",
      "ts":"2026-03-02T08:11:44Z"
    }
  ],
  "next_cursor": "eyJv..."
}

Inbound-transfer webhook + AML hook

POST https://your-app.example/hooks/walletverse
X-Webhook-Signature: t=1715420000,v1=8d3e...
Content-Type: application/json

{
  "event":"transfer.confirmed",
  "wallet_id":"wv-9f3c-...-2a",
  "chain":"ethereum",
  "tx_hash":"0xc1...",
  "direction":"in",
  "token":"USDT",
  "amount":"1500.00",
  "counterparty":"0x77...",
  "aml": {
    "risk":"medium",
    "tags":["mixer-adjacent"],
    "provider":"chainalysis-style"
  },
  "travel_rule": {
    "originator_vasp":"unknown",
    "beneficiary_vasp":"self-custody"
  }
}

Regulatory frame

Because Wallet Verse is self-custodial, private keys never leave the user device and we never touch them. The data we expose is either user-consented (signed by the wallet) or publicly available on-chain. Where the buyer is itself a regulated VASP, we map outputs to the FATF Travel Rule recommendations for virtual assets, including IVMS 101 originator/beneficiary fields.

In the United States, regulated counterparties using the API can integrate it with their existing BSA/FinCEN MSB program and IRS Form 1099-DA reporting. In the EU and UK the same data feeds MiCA reporting obligations and HMRC self-assessment.

Privacy controls

• Per-call consent token signed by the owning wallet (EIP-4361 / "Sign-In With Ethereum" style)
• Configurable data retention windows (7 / 30 / 365 days) with hard delete
• Address-level pseudonymization in logs by default
• GDPR Article 17 ("right to erasure") workflow built into the admin console
• Optional zero-knowledge KYC plug-in for proving "verified user" without transmitting identity documents

About OpenFinance Lab

We are an independent studio focused on fintech and open-data API integration. Our engineers come from cryptocurrency exchanges, payment processors, mobile-app reverse engineering teams, and cloud infrastructure providers. We understand the data shapes of self-custodial wallets, the constraints of FATF/MiCA/BSA regulations, and the practical limits of public chain indexers — and we ship end-to-end financial APIs under those constraints.

• Self-custodial wallets, DEX aggregators, on-ramp providers and cross-border crypto rails
• Enterprise API gateways, signing services and security reviews
• Custom Python (FastAPI), Node.js, Go and Rust SDKs with full test harnesses
• Full pipeline: protocol analysis → build → validation → compliance brief
• Source code delivery from $300 — runnable code and full documentation; pay after delivery upon satisfaction
• Pay-per-call hosted API — pay only per call, no upfront cost; ideal for usage-based pricing

Contact

For quotes, scope reviews, or to submit your target app and integration requirements, open our contact page:

Contact page

Typical reply time: one business day. We sign NDAs before any protocol-level discussion.

Engagement workflow

1. Scope confirmation: which chains, which data surfaces (balances, swaps, NFTs, staking), which downstream system.
2. Protocol analysis of the Wallet Verse client and indexer selection (2–5 business days).
3. Build, internal validation against test wallets and reference fixtures (3–8 business days).
4. Docs, OpenAPI spec, sample collection and test cases (1–2 business days).
5. Typical first delivery in 5–15 business days; third-party indexer approvals may extend the window.

FAQ

What data does Wallet Verse hold that can be integrated?

How long does delivery take?

How do you handle compliance for a self-custodial DeFi wallet?

Can the API cover both Bitcoin and EVM chains?