Crypto Infrastructure
10 technical briefings from 9 companies building crypto infrastructure infrastructure.
Ansible Labs co-founder Dan demos Beam, the team's crypto-to-cash off-ramp, at V-Sum Nineteen. The briefing covers wallet-connect onboarding, blockchain risk screening (TRM Labs / Chainalysis / Elliptic) on both the enrolled wallet and the source-of-funds address, Persona KYC, and a unique 1:1 smart-contract Beam address tied to a user + bank-account pair. A live production $15 off-ramp lands in a Bank of America account via RTP in minutes, with ACH, RTP, and push-to-card (Visa Direct / Mastercard Send) on the payout roadmap.
Antonio Georgalis, principal solution engineer at Prime Trust, demos the Prime Trust regulated custody and liquidity platform — the API-driven back-end infrastructure that connects crypto to the US dollar financial system for fintechs. The platform covers KYC-gated account creation (/v2/accounts), settlement, cash and asset transfers, and a liquidity API (/v2/quotes) that converts between dollars and roughly eight to ten supported digital assets via a request-for-quote flow. Money-in rails include ACH pull, wire, debit card, and Signet; money-out covers ACH and wire disbursements. The demo walks through the liquidity quote lifecycle end-to-end: RFQ with a price and expiration, execute, and check settlement status. Prime Trust runs two settlement modes — instant (settle asynchronously within milliseconds of execution, default) and scheduled (execute first, move funds in later, settle end-of-day, similar to T+2 in traditional markets) — plus a hot vs. warm balance distinction for automated vs. operations-reviewed disbursements.
Jordan Valentine & Davis Hart
Davis Hart and Jordan of Paxos walk through the regulated crypto infrastructure Paxos provides to financial institutions — including PayPal, Paxos's first crypto brokerage customer from 2020. This briefing focuses on the June 2022 transfers launch: the ability for Paxos customers to enable their end users to deposit and withdraw crypto directly into their wallets without a fiat round-trip. The demo covers the PayPal web UI receive/send flows, Paxos's guaranteed network fees, and the Postman walkthrough of the three-endpoint withdrawal API: create a crypto-withdrawal fee quote (rate locked for minutes so retail users have time to review), submit the withdrawal with amount-vs-total and fee-asset-selection UX tools for developers, and track the transfer to completion with compliance checks and block confirmations. A final deposit-address walkthrough shows how Paxos issues one address per blockchain per end-user — covering Bitcoin, Bitcoin Cash, Ethereum, and the rest of the asset list.
Victor Faramond
MoonPay is the on-ramp that lets anyone with a crypto wallet top up in a couple of clicks — or, increasingly, buy an NFT with a credit card without ever touching crypto. The demo opens with the common workflow (found an NFT on OpenSea, not enough ETH on Polygon to buy it), walks through a $30 ETH-on-Polygon top-up with 3D Secure via a UK banking app, and tours buy.moonpay.com — MoonPay supports 100+ cryptocurrencies, 40+ fiat currencies, SEPA across Europe and the UK, and a limited US ACH rollout. For developers, MoonPay ships a configurable widget (iframe or URL) with pre-fillable currency, amount, wallet address, email, language, and brand colors, plus an API key per partner. The closing demo buys an NFT on OpenSea with the MoonPay iframe filter enabled — one saved-card click, 3D Secure, and the NFT is minted to the buyer's wallet with no bridging or gas-fee juggling required.
Max Howenstine
Zero Hash presents their crypto-as-a-service API at V-Sum Twelve. Presented by Max Howenstine, with a live demo of crypto-back credit card rewards built with Deserve — three API calls to go to market.
Brandon Millman
Phantom presents their Solana wallet at V-Sum Eleven. Presented by co-founder Brandon Millman, covering token swaps, staking, NFT management, transaction simulation, and phishing protection.
Rui Gomes & Julie Landrum
OpenNode is a Bitcoin infrastructure provider focused on Bitcoin payments and payouts. The thesis: Bitcoin is the internet-native currency — global, decentralized, borderless, low-cost, and instantly final via the Lightning Network — and that makes it a better rail for online payments than legacy schemes. OpenNode powers Bitcoin payments for McDonald's El Salvador locations, Substack creator subscriptions, and Bitcoin-native companies like Fold. The demo walks through the OpenNode merchant dashboard (on-chain vs Lightning requests, live QR payment, USD auto-conversion so merchants have no volatility risk), payment buttons and invoicing, split settlement that keeps a configurable percentage in Bitcoin and the rest in fiat, and the OpenNode API for generating charges and paying out Bitcoin or Lightning without ever holding the coins.
Nick Neuman & Michael Haley
Casa demos its personal key-manager product for Bitcoin self-custody — a safe, visually-consumer-first way to hold Bitcoin private keys without falling off the "one key, one pool of coins" cliff that has already lost an estimated 4M of Bitcoin\'s 21M total supply. At Casa\'s highest security tier, five keys protect one Bitcoin pool (mobile phone, three hardware wallets, one emergency Casa-held key) under a 3-of-5 multi-sig — losing any one key doesn\'t risk your funds. A separate "checking account" uses a single mobile key for fast spending. The send flow shows the multi-sig in action: the phone signs first, Casa emails a prompt to plug in a Trezor or Ledger for the second signature, and a third hardware approval broadcasts the transaction to Bitcoin\'s network. QR-code-based signing on next-gen hardware wallets will eliminate the email step. Casa\'s replace-a-lost-key flow skips seed-phrase recovery entirely — mark the key compromised, add a new hardware device, and transfer funds with the remaining healthy keys. Premium service tiers offer concierge-style support for high-net-worth holders.
Patrick Larsen & Dan Hannum
ZenLedger presents crypto taxes and accounting at V-Sum Six. Presented by Patrick Larsen and Dan Hannum, covering portfolio tracking, taxable event reporting, tax loss harvesting, and full audit reports for cryptocurrency investors and tax professionals.
Zach Kwartler
Zach Portler, product lead at Paxos, introduces Paxos as the regulated-custodian gateway between physical and digital assets, built for the multi-decade migration of $600T of assets from closed ledgers to public blockchains. Paxos is unusual in offering regulated custody and tokenization across four asset classes — crypto, cash, commodities, and securities — including USD-backed stablecoins (wire in, Paxos mints 1:1-redeemable tokens) and Pax Gold (PAXG), where tokenized gold balances on Ethereum are backed by physical gold in an unallocated account. This earlier briefing zooms in on the PayPal crypto partnership Paxos powers: the Paxos admin portal's signing ceremony for moving assets between banks and blockchains, and the four Paxos API endpoints PayPal uses under the hood (list-historical-prices for the chart, list-quotes to price a buy, create-quote-executions for the actual order, tickers for real-time holdings).