UDP Packets

For a similar, but non-blocking alternative to TCP, you can use UDP packets to send the metric(s) to us. Ensure each metric name is prefixed by your API key, then send your metric(s) using the Metric Data Format to:

Host: carbon.hostedgraphite.com Port: 2003

Here’s a simple example using netcat on linux:

echo "YOUR-API-KEY.conc_users 1.2" | nc carbon.hostedgraphite.com 2003


You can send multiple metrics on separate lines as with TCP, but be aware there is a size limit of 8192 bytes for UDP packets.

For programming language-specific examples of sending metrics via UDP, check out our Language Guide.