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Awesome Free Public Real-Time Data Sources

A curated list of truly free, publicly accessible real-time datasets and streaming sources. All sources listed below are accessible without API keys, authentication, or paid subscriptions (though some may have rate limits or usage caps on free tiers).

This list focuses on real-time or near real-time data accessible via HTTP APIs, WebSockets, SSE (Server-Sent Events), or other streaming protocols.

🎮 Try the Live Stream Viewer

Test any WebSocket, SSE, or HTTP endpoint instantly in your browser!

🔌 Stream to Kafka

Want to stream these real-time sources into Apache Kafka? Check out our Kafka Connect WebSocket Plugin - an open-source connector that lets you ingest WebSocket streams directly into Kafka topics.

Finance & Cryptocurrency
Transportation
Weather & Environment
Seismic & Natural Events
Space & Astronomy
Information & News
Government & Public Data
Entertainment & Media
IoT & Sensors
Social & Community
Sports
Cybersecurity
Development & Testing
Geographic & Location

Finance & Cryptocurrency

Cryptocurrency Exchanges (WebSocket)

Coinbase Pro WebSocket - Real-time market data including order books, trades, and ticker updates. No authentication required for public channels. 🔴 Try it live
```
wss://ws-feed.exchange.coinbase.com
```
Binance WebSocket Streams - Real-time cryptocurrency trading data, order books, and market updates for 1000+ trading pairs. 🔴 Try it live
```
wss://stream.binance.com:9443/ws/btcusdt@trade
```
Blockchain.com WebSocket - Real-time Bitcoin and Ethereum blockchain transaction notifications. 🔴 Try it live
```
wss://ws.blockchain.info/inv
```
Kraken WebSocket - Real-time cryptocurrency market data. Public feeds available without authentication. 🔴 Try it live
```
wss://ws.kraken.com
```

Cryptocurrency Market Data (SSE)

DexPaprika SSE - Real-time cryptocurrency prices and DEX data via Server-Sent Events. Multi-chain support. No authentication. 🟡 Try it live
```
https://mcp.dexpaprika.com/sse
```

Market Data APIs

CoinGecko API - Real-time prices for 12,000+ cryptocurrencies. Free tier: 50 calls/minute, no API key needed for basic endpoints. 🔵 Try it live
```
https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd
```
Mempool.space API - Real-time Bitcoin blockchain data including mempool, blocks, transactions. No authentication required. 🔵 Try it live
```
https://mempool.space/api/mempool
https://mempool.space/api/blocks/tip/height
```

Transportation

Public Transit

Transport for London (TfL) API - Real-time data for London Underground, buses, bikes. No API key required for many endpoints.
```
https://api.tfl.gov.uk/StopPoint/{id}/Arrivals
```
Helsinki Regional Transport (HSL) - MQTT-based real-time vehicle positions and transit data.
```
mqtt://mqtt.hsl.fi:1883
```
MTA Real-Time Data Feeds - NYC subway and bus real-time arrival data in GTFS format. Requires free API key registration.
Transport for NSW Open Data - Real-time public transport data for Sydney, Australia.

Aviation & Maritime

OpenSky Network API - Real-time flight tracking data from crowd-sourced ADS-B receivers. Free tier: 400 requests/day. 🔵 Try it live
```
https://opensky-network.org/api/states/all
```
Norwegian Coastal AIS Data - Ship positions via AIS within Norwegian waters.

Bike Sharing

GBFS (General Bikeshare Feed Specification) - Real-time bike share data from 400+ systems worldwide.
- NYC Citi Bike: https://gbfs.citibikenyc.com/gbfs/gbfs.json
- Find more systems: GBFS Systems List

Weather & Environment

Weather Data

Open-Meteo API - Free weather API with no API key required. Real-time weather, forecasts, historical data. 🔵 Try it live
```
https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&current_weather=true
```
NOAA Weather API - Real-time weather data from US National Weather Service. Requires proper User-Agent header.
```
curl -A "YourApp/1.0 (contact@example.com)" https://api.weather.gov/gridpoints/TOP/31,80/forecast
```
NOAA Buoy Data - Real-time oceanographic and meteorological data from buoys worldwide.

Air Quality

EPA AirNow API - US air quality data. Free API key with generous limits.
Sensor.Community API - Global crowdsourced air quality data from 15,000+ sensors. No authentication required. 🔵 Try it live
```
https://data.sensor.community/airrohr/v1/filter/area=51.3,7.5,10
```

Water & Flooding

UK Environment Agency Flood API - Real-time UK flood monitoring data. No authentication. 🔵 Try it live
```
https://environment.data.gov.uk/flood-monitoring/id/stations
```
USGS Water Services - Real-time stream flow, groundwater, and water quality data for US. 🔵 Try it live
```
https://waterservices.usgs.gov/nwis/iv/?format=json&sites=01646500&parameterCd=00060,00065
```

Space Weather & Solar Data

NOAA Space Weather Prediction Center (SWPC) - Real-time solar wind, geomagnetic, and space weather data. No authentication. 🔵 Try it live
```
https://services.swpc.noaa.gov/products/solar-wind/mag-7-day.json
https://services.swpc.noaa.gov/products/geospace/geospace-1-day.json
```

NASA POWER API - Solar and meteorological data from NASA satellites. No authentication. 🔵 Try it live

https://power.larc.nasa.gov/api/temporal/daily/point?parameters=T2M&community=RE&longitude=-95.37&latitude=29.76&start=20241201&end=20241201&format=JSON

Carbon & Energy

UK Carbon Intensity API - Real-time UK electricity carbon intensity. No authentication. 🔵 Try it live
```
https://api.carbonintensity.org.uk/intensity
https://api.carbonintensity.org.uk/regional
```

Seismic & Natural Events

USGS Earthquake API - Real-time earthquake data globally. No authentication required. 🔵 Try it live
```
https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_hour.geojson
```
European-Mediterranean Seismological Centre (EMSC) WebSocket - Real-time seismic events via WebSocket. 🔴 Try it live
```
wss://www.seismicportal.eu/standing_order/websocket
```

Space & Astronomy

NASA APIs - Multiple APIs including APOD, Mars Rover photos, asteroids. Free API key with high limits (1000/hour).
```
https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY
```
International Space Station (ISS) Position - Real-time ISS location. No authentication. 🔵 Try it live
```
http://api.open-notify.org/iss-now.json
```
SpaceX API - Real-time data on SpaceX launches, rockets, capsules. No authentication. 🔵 Try it live
```
https://api.spacexdata.com/v4/launches/latest
```
N2YO Satellite Tracking API - Real-time satellite positions. Free tier available.

Information & News

Wikipedia & Wikimedia

Wikimedia EventStreams - Server-Sent Events (SSE) stream of real-time edits to Wikipedia and other Wikimedia projects. No authentication required. 🟡 Try it live
```
curl -N https://stream.wikimedia.org/v2/stream/recentchange
```
Additional streams:
- Page creation: https://stream.wikimedia.org/v2/stream/page-create

public-streaming-api