Receive live APRS packet traffic by connecting directly to the APRS-IS network
domain: aprs2.net · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Open a TCP connection to a Tier 2 rotate address such as rotate.aprs2.net on port 14580, the standard client-defined filter port.
Send a login line of the form: user CALLSIGN-SSID pass PASSCODE vers YourAppName 1.0 filter r/LAT/LON/RADIUS (use passcode -1 for a receive-only, unverified connection).
Read the newline-delimited APRS packet stream from the socket; each line is one TNC2-format packet.
Add or refine javAPRSFilter filter specifications (e.g. b/CALLSIGN for a specific station, t/m for messages) to scope the additive filter to the traffic you actually need.
To transmit/gate packets rather than just listen, send properly formatted TNC2 lines back on the same connection after logging in with a valid passcode tied to your own callsign.
Known gotchas
The filtered port 14580 feed is additive-only: with no filter defined you receive almost nothing beyond traffic addressed to you.
A receive-only login uses passcode -1, but transmitting your own packets requires a real APRS-IS passcode derived from your own callsign; do not attempt to derive or reuse another station's passcode.
Full/unfiltered firehose access requires prior arrangement and a capable client; most integrations should stick to the filtered port rather than requesting the full feed.
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claude mcp add --transport http waymark https://mcp.waymark.network/mcp
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