A mark price you can build on.

NX Rates aggregates on and off-chain exchanges, tier-one banks, brokers, and OTC desks into one reference price for crypto, FX, and metals.

Explore live data See plans

No signup to preview Same index on every plan Card, crypto, or wire

live

Thousands of tickers · crypto, FX, metals

100+

Exchanges & venues

1,000+

On-chain pools

100-200 ms

Index cadence

56 B

Binary index record

Why teams subscribe

Markets disagree.
Your systems need consensus.

A raw venue feed tells you what happened in one place. NX Rates gives you a resilient reference across the market, without operating the aggregation stack.

One clean signal

One normalized composite for monitoring, execution benchmarking, and risk.

Consistent marks

One reference for NAV, PnL, treasury, and settlement. Trading and accounting agree.

No feeds to rebuild

Stream live indexes or query OHLC history. No exchange adapters to maintain.

Our methodology

Time-decaying weighted average price.

Every index is a TDWAP: a weighted average over all accepted source quotes where recent prints carry more weight, and stale or outlier sources decay out via a per-source confidence model. Each tick carries mid, bid, ask, and a confidence interval.

Read the methodology

Provider Weight Decay Price Venue A 40% 100% 100.00Venue B 34% 100% 100.00Venue C 26% 100% 100.00

Composite 100.00

confidence = Σ wᵢ·dᵢ = 100 / 100

One index, three interfaces

Start in minutes. Try it now.

Use JSON for evaluation and applications, WebSocket for live workflows, or MITCH when every byte and allocation matters.

REST

JSON

Latest index values and OHLC history in familiar JSON.

Low frequencyConvertersAccountingOTC & P2P settlementPoCs

WebSocket

f64 binary

Batched index updates on a 200 ms publication cadence.

Medium frequencySystematic tradingDashboardsAnalyticsPayment rails

MITCH

binary

Open zero-copy protocol, as low-overhead as market data gets, with SDKs across major languages.

High frequencyMarket makingArbitrageContractsOracle feeds

bash live

$ curl -sS 'https://api.nxrates.com/v1/price/BTC-USDT'

{
  "ticker": 435315775907037184,
  "mid": —,
  "bid": —,
  "ask": —,
  "confidence": —
}

Open quickstart

Pricing

Simple plans. Same mark quality on every tier.

Paid plans add binary encodings, capacity, history depth, support, and client-facing rights. Same mark on every tier: you pay for the operational envelope, not a better price.

Find your fit

Transport WebSocket Encoding f64 binary Plan Pro Choose Pro

Annual includes two months free

Starter

$25 /mo billed annually ($300/yr)

For a production script, internal dashboard, or first live valuation workflow.

Production key; JSON, f64, and MITCH
1,000 req/min · 10k/hour · 100k/day
10 real-time feed units
30 s OHLC floor, 90-day history
Email and Telegram support
No redistribution rights
No service SLA

Choose Starter

Recommended

Pro

$83 /mo billed annually ($1000/yr)

For multi-symbol monitoring, research, and production valuation at higher throughput.

Everything in Starter
10k req/min · 100k/hour · 1M/day
50 real-time feed units
10 s OHLC floor, 365-day history
4-business-hour first-touch target
Priority email and Telegram support
No redistribution rights

Choose Pro

Enterprise

$833 /mo billed annually ($10000/yr)

For client-facing products, custom coverage, multi-desk workflows, and contracted support.

Everything in Pro
500 concurrent WebSocket feeds
100k req/min · 1M/hour · 10M/day
1 s OHLC floor, full available history
Contracted service terms
Named client-facing use by agreement
Custom symbol onboarding
3 h/mo integration engineering (rollover 9 h)
Named support + phone escalation

Talk to us

Colo

From $5,000 /mo

Rack-local delivery and tailored distribution terms for latency-sensitive infrastructure.

Everything in Enterprise
UDP multicast direct off the aggregator
A/B redundant rack-local delivery
Unbounded plan entitlements
Tailored white-label redistribution rights
10 h/mo integration engineering
Operator-led onboarding

Talk to sales

Free $0/mo

No signup and no card. Inspect live prices and recent history before production use.

JSON REST and one base WebSocket stream
100 req/min · 1k/hour · 10k/day
1-minute OHLC, 30-day history
No MITCH or flat-f64 encoding
No redistribution rights
No support or service SLA

Explore live data

bash

curl -sS 'https://api.nxrates.com/v1/ohlc/BTC-USD?tf=60&limit=100'

Starter and Pro cover personal or internal commercial use; public display and redistribution require written Enterprise or Co-location terms. Annual billing is 10 months for 12. Pay by card, crypto, or annual bank wire.

Beyond the feed

From silicon to signal.

NX Rates is one product of a team that builds low-latency systems end to end, for teams that win on speed. The foundations under the feed are open source: inspect them, or bring us a bespoke build.

Protocol

Zero-copy market data.

MITCH is our open read-only wire protocol: canonical instrument identity across venues, parsed in microseconds with zero copies, 40% smaller than NASDAQ ITCH. mmap a file, cast it to a struct, done.

View MITCH Protocol docs

Pipelines

Ticks in, clean bars out.

Series Factory is our open aggregation engine: it dedupes and normalizes raw trades from many sources into clean tick streams, then builds dollar-imbalance, tick-imbalance, and Renko bars for systematic research.

View Series Factory

Distributed Infrastructure & Networking

Full-stack distributed systems: blockchain VMs, consensus networks, and bare-metal mesh where data integrity and sub-millisecond propagation define the outcome.

Quantitative Finance & DeFi

Infrastructure for trading desks, systematic funds, and on-chain liquidity: exchange connectivity, derivatives pricing, AMM mechanics, and order-flow analysis.

Systems Engineering & Performance

Close to the wire: zero-copy Rust and C, SIMD vectorization, lock-free concurrency, and dedicated silicon. Every nanosecond and byte accounted for.

Security & Risk

Security engineering and quantitative risk across the stack: contract bytecode, firmware, fuzzing, post-quantum crypto, VaR/CVaR, and compliance pipelines.

Discuss an engagement

We've built alongside

Questions

Know what you are buying.

Still evaluating? The live preview is open, and a technical question goes directly to the team.

Can I evaluate the data before paying?

Yes. The live feed explorer and Free REST tier require no account or API key. Inspect current prices, crosses, and recent history before choosing a production plan.

Do lower-priced plans receive a slower index?

No. Every plan receives the same composite and the same 200 ms index values. Plans differ by concurrency, history depth, delivery guarantees, support, and redistribution rights.

What happens when a venue goes stale or prints an outlier?

Source-level checks screen invalid observations. Accepted quotes are weighted by quality and freshness, so stale sources lose influence and the published confidence falls with usable depth.

Can I redistribute NX Rates data?

Starter and Pro are for internal use. Enterprise includes limited redistribution; public display, white-label, and tailored rights are available under Enterprise or Co-location agreements.

How quickly can I integrate?

Most teams start with REST or WebSocket in minutes using the quickstart. Enterprise includes integration engineering; MITCH and other binary formats are available when wire efficiency matters.

Contact