Docs API Reference

API Reference

The EurekaLabs Management API is a REST API over HTTPS. Base URL: https://api.eurekahq.org/v1. All requests require Bearer token authentication. Responses are JSON.

Authentication

Obtain an API key from the management console under Settings > API Keys. Include it in every request as a Bearer token.

http 
Authorization: Bearer eklk_live_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

Sessions

Manage FIX and EKL binary sessions through the sessions resource.

GET /v1/sessions List all sessions for your account
GET /v1/sessions/{id} Retrieve a session by ID
POST /v1/sessions Create a new session configuration
POST /v1/sessions/{id}/reset Reset sequence numbers for a session
DELETE /v1/sessions/{id} Delete a session configuration

Latency Query

Pull hardware-timestamp latency measurements for a session. All values are in nanoseconds. Query results are aggregated from the hardware timestamping modules at each gateway.

GET /v1/latency Query latency for a session over a time range

Query parameters:

Parameter Type Description
session string Session ID or SenderCompID
period string Lookback period: 1h, 6h, 1d, 7d
venue string Optional venue filter (e.g. XNAS, XNYS)
json 
{
  "session": "YOUR_SESSION",
  "period": "1h",
  "p50_ns": 195,
  "p99_ns": 342,
  "p999_ns": 580,
  "samples": 18420,
  "venue": null,
  "as_of": "2026-01-14T14:32:00Z"
}

Venues

Query supported venues and your active venue connections. Venue list reflects the exchanges and ECNs your tier and co-location site support.

GET /v1/venues List all venues supported on your account tier
GET /v1/venues/{mic} Get venue details by MIC code (e.g. XNAS)

EKL Binary Protocol

The EKL binary protocol is a low-overhead alternative to FIX for clients where sub-100ns end-to-end latency is required. It uses a fixed-length header and variable-length field encoding derived from SBE (Simple Binary Encoding).

binary frame 
// EKL Frame Header (16 bytes, little-endian)
uint16  magic        // 0x454B "EK"
uint8   version      // protocol version = 2
uint8   msg_type     // 0x01=NewOrder 0x02=Cancel 0x10=ExecReport
uint32  seq_no       // monotonic per-session sequence
uint64  send_ts_ns   // sender PTP timestamp, nanoseconds epoch

// Followed by message body (variable, SBE-encoded fields)

Full field encoding tables and schema files are available in the management console under Documentation > EKL Binary Schema.

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