The fastest crypto listing WebSocket, measured from your server

New Listings Feed is the fastest crypto listing WebSocket for trading bots and listing snipers. Put that position to the test: compare when the same announcement reaches your server with the fields your application uses. This guide explains how to match events, account for plan delays and assess the results.

Compare the event your application can use

A raw headline, a classified listing and a token contract answer different questions. Choose the data your application uses before comparing arrival times. A raw notice can reach your parser first while the parsed event saves work your application would otherwise do after receipt.

New Listings Feed offers both through its WebSocket API. Both streams include source URLs and microsecond-precision detection and publication timestamps. Paid Full events add available project and onchain data.

Raw and parsed listing-feed data
Data	/v2/fast	/v2/full
Announcement text	Raw announcement title or exchange post	Announcement title or post text when available
Exchange and source	Exchange identifier and source URL	Exchange identifier and source URL
Listing classification	Your parser extracts it	Listing or delisting, market type and detected tickers
Upbit quote markets	Your parser extracts them	KRW, BTC or USDT when present in the spot notice
Token identity and onchain context	Your system supplies it	Paid keys add available contracts, suggested matches, DEX pairs and metrics
Key access	STARTER and PRO	FREE, STARTER and PRO

Configured delay is part of the comparison

New Listings Feed FREE has a 3-second configured delay, STARTER has 20ms and PRO has zero configured delay. Record the applied plan and delay for each feed you test. A delayed integration key and a zero-delay paid key answer different performance questions.

FREE lets you inspect parsed events and measure delivery after Full publishes them. It does not demonstrate PRO arrival times. Evaluate our fastest delivery with a PRO capture on the endpoint your application will consume. Zero configured delay still leaves time for delivery and client processing.

Compare WebSocket keys

Measure arrivals for the same announcements

Connect the feeds you want to compare from one receiver. Timestamp each arrival before parsing or logging, using the same monotonic clock. This compares arrival order at that application without relying on agreement between different providers' clocks.

Match the original notice URL, exchange, event and assets. Keep distinct notices separate: an Alpha feature announcement is not the same event as Alpha Live, and an asset-catalog discovery is not a spot listing. Provider event IDs are not a shared matching key.

Use equivalent raw or parsed streams, include any enrichment your application requires, and run the comparison across multiple sessions. Keep the receiver location, endpoint, plan and filter settings with the results.

What to record in a listing-feed comparison
Record	Why it matters
Observation window and event count	Shows how much evidence the result covers
Exchange and event type	Makes a Binance spot comparison distinguishable from an Upbit KRW or Robinhood assets comparison
Matched arrival differences	Shows which usable event reached the same receiver first and by how much
Median, upper percentiles and largest differences	Shows the distribution rather than one selected event
Missing events, duplicate notices and disconnects	Keeps coverage and connection behavior visible alongside speed
Complete capture and matching rules	Makes later runs comparable and lets another reader inspect the result

Run the Node.js delivery capture

Detection, publication and receipt measure different work

Our historical records show detection usually within 1–20ms of original announcement publication for many exchanges. Explore recent detection timestamps and measure delivery from your own server.

Detection records describe when New Listings Feed observed a source event. Your receipt timestamp describes when the message reached your application. Comparing receipt against a server timestamp also includes clock uncertainty, so timestamp precision alone does not establish latency or first arrival.

Fast records its publication timestamp before the configured delay. Full records it after the delay. Use the documented interval definitions when reading a capture; publication-to-client time is not a measurement of the network alone.

Speed also has to survive exchange changes

Exchanges change announcement formats and add new markets. Staying fast requires ongoing monitoring, investigation and maintenance. The responsibility grows with the number of exchanges and event types a feed covers.

An individual scraper can work well for a focused use case. Its owner also handles exchange changes and performance problems. A managed feed shifts that maintenance responsibility to the provider. Evaluate coverage and data quality alongside delivery speed.

Choose how much announcement-feed work to own
Approach	Your ongoing work
Manual monitoring	Check the exchange notices and interpret each update yourself.
Your own scraper	Maintain the integration, parsing and performance for each source you follow.
New Listings Feed WebSocket API	Connect your application, choose the events it handles and evaluate the incoming data.

Test New Listings Feed from your own server

New Listings Feed provides raw and parsed listing events across Binance, Coinbase, Upbit, Bithumb, Robinhood and additional exchanges. Paid keys include Tokyo, New York and Seoul endpoints. For Upbit, start with Tokyo to test our fastest delivery; compare Seoul arrivals too if your bot runs nearby. Start with a free key to inspect the Full payload, then compare PRO arrivals for the exchanges and event types your application follows.

Put our fastest positioning to the same test as any other feed. Judge the complete capture, the data that arrived and the public operating record together.

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