sifting/io
Crypto wallet & fintech app

Crypto wallets and fintech apps

Embed live crypto and FX rates into wallets, payment quotes, and end-user fintech flows worldwide, under predictable per-market pricing.

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Crypto data APIForex data API
Freetier to launch on
<100msmedian quote latency
Worldwidecurrency coverage
How it fits together

One feed in, your product out

Markets you need
CryptoForexStablecoins
SiftingIOOne JSON schema. One key. REST and WebSocket.
What you buildYour wallet or fintech app

Consumer crypto and fintech apps have a specific data problem: the rate on the screen has to look right to a non-expert user, on any device, in any region, at any hour, including the weekend when traditional FX is closed. And it has to stay affordable when hundreds of thousands of users are opening conversion screens. This is how teams meet both constraints on SiftingIO.

The problem

Consumer fintech apps need live FX rates and crypto prices that look right at every conversion screen, across regions, devices, and weekend gaps. Legacy data sources price for institutional desks, not for high-volume consumer apps.

How SiftingIO handles it

Pay-per-market pricing means a wallet app starts on the Crypto plus Forex Duo bundle and scales linearly with volume. Sub-100ms median latency from primary regions keeps UI quotes feeling live, and deterministic weekend behavior for FX prevents stale-quote bugs in payment flows.

Quotes that feel live without an institutional bill

Legacy data contracts are priced for trading desks, not for an app that renders a conversion screen every time a user opens it. SiftingIO charges per market on a monthly call quota, so a wallet starts on a Crypto plus Forex bundle and scales in a straight line with usage. You are not paying desk prices to show a balance in a second currency to a free user.

Weekend and closed-market behavior is explicit

A common and embarrassing bug in payment apps is showing a stale FX rate over the weekend as if it were live, then settling at a different number on Monday. Foreign exchange here has a defined weekend behavior, so your app can tell whether a rate is currently trading or carrying the last session close, and show the user the honest thing instead of a silently frozen number.

One integration across crypto and fiat

Wallet apps usually need both crypto prices and fiat FX, and stitching two providers together doubles the surface you have to keep working. Crypto and forex share the same schema and the same key here, so a single client covers both the token balances and the local-currency conversion. Stablecoin pairs in USD, USDC, and DAI are part of the crypto coverage, so the pairs your users actually hold are quotable out of the box.

Start building

From zero to live data in three steps

  1. 1

    Create a free API key

    Sign up and generate a key. The free tier covers every market, with no sales call to get started.

  2. 2

    Subscribe to your markets

    Add the markets your product needs. Bundle discounts apply automatically once two or more Pro markets are active.

  3. 3

    Call REST or stream over WebSocket

    Pull snapshots and history over REST, or subscribe to live ticks over WebSocket. Same schema and key, in Go, Python, or TypeScript.

Get an API keyRead the quickstart
FAQ

Crypto wallet & fintech app: common questions

Can I embed live crypto and FX rates into a wallet?

Yes. REST snapshots render conversion screens on load and WebSocket keeps them live, both under one credential. The same JSON schema covers crypto and FX, so a wallet integrates once and reuses the shape across every conversion surface.

How does pricing scale with my user base?

Pricing is per market and per tier, billed on a monthly call quota for REST, so cost scales in a predictable line rather than jumping at arbitrary thresholds. A typical wallet starts on the Crypto plus Forex Duo bundle, which applies a bundle discount automatically.

What happens to FX quotes over the weekend?

Foreign exchange has a deterministic weekend behavior so quotes do not silently go stale in a payment flow. You always know whether a rate is live or carrying the last session close.

Are stablecoin pairs covered?

Crypto coverage includes major stablecoin pairs in USD, USDC, and DAI, so a wallet or remittance product can quote the pairs its users actually hold.

Do I need an enterprise contract to start?

No. There is a free tier on every market and no enterprise minimum, so you can prototype, launch, and scale on self-serve plans, then talk to us only if you later need custom limits or invoicing.

More use cases

Other teams building on SiftingIO

Trading platformTrading platforms and exchangesPortfolio & wealth platformPortfolio and wealth dashboardsForex broker / FX infraForex brokers and FX infrastructureAnalytics & research platformMarket analytics and research platformsBacktesting & strategy systemBacktesting and strategy testing systemsAI agent & intelligence productAI agents and financial intelligence productsDeveloper / indie builderFinancial data APIs for developers
All use cases
Same data, same SLA, same schema

Build this on SiftingIO.

Start on the free tier, mix asset classes when you need to, and reach out if you want a closer look at how a similar team set up their stack.

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