Financial Data API

Real-Time Financial Data API — Sub-10ms Latency, WebSocket Streaming

Real-time stock prices, WebSocket streaming, global CDN. Tick-level data with microsecond timestamps.

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Coverage

Built for low-latency trading

01

Real-Time Prices

Live quotes, last trade, bid/ask. Sub-10ms median latency.

02

WebSocket Streaming

Push-based updates. No polling. Persistent connections.

03

Global CDN

Edge nodes worldwide. Low latency from any region.

04

Tick-Level Data

Every trade. Microsecond timestamps. Full depth.

05

90+ Exchanges

US, Europe, Asia. Equities, ETFs, indices.

06

REST Quote API

On-demand quotes. Simple HTTP. Same auth as WebSocket.

Endpoint Examples

WebSocket & REST

wss://stream.eulerpool.com/v1/subscribe
WebSocket message (incoming)

  "type": "quote",
  "ticker": "AAPL",
  "price": 189.84,
  "bid": 189.82,
  "ask": 189.86,
  "volume": 45230100,
  "timestamp": "2024-02-20T14:32:15.123456Z"
Microsecond precision
GET /v1/equities/{ticker}/quote
$
curl https://api.eulerpool.com/v1/equities/AAPL/quote \
-H "Authorization: Bearer ep_live_xxx"

  "ticker": "AAPL",
  "price": 189.84,
  "change": 1.24,
  "changePercent": 0.66,
  "timestamp": "2024-02-20T14:32:15.123456Z"
200 OK — 6ms

Key Stats

Built for speed

<10ms

Median latency

Global

CDN

90+

Exchanges

μs

Timestamp precision

Frequently asked questions

Eulerpool delivers sub-10ms median latency for real-time stock quotes via a global CDN. WebSocket streaming provides push-based updates with microsecond timestamp precision. Edge nodes worldwide ensure low latency regardless of your location.

Connect to wss://stream.eulerpool.com/v1/subscribe, authenticate with your API key, and subscribe to ticker symbols. You receive push-based JSON messages for every price update — no polling required. The connection is persistent and auto-reconnects.

Real-time data includes last trade price, bid/ask quotes, volume, and tick-level data across 90+ global exchanges. Asset classes covered include equities, ETFs, and indices. Data arrives with microsecond timestamps for precise event ordering.

Yes. Use the REST API (GET /v1/equities/{ticker}/quote) for on-demand snapshots, and WebSocket for continuous streaming. Both use the same authentication. REST is ideal for dashboards; WebSocket is ideal for trading systems and real-time analytics.

The free tier includes delayed quotes and 1,000 API calls per day. Real-time streaming via WebSocket is available on Pro plans and above. All plans include the same data coverage — the difference is latency and rate limits.

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