Fldigi MCP server

Read from the package source without running it. The installed server may list more.

• application

  The fldigi program and its process.

• band_guidance

  Advisory band guidance (experimental, region-aware) — informational / QSY help only.

• browser

  fldigi's Signal Browser over XML-RPC: every station the multi-channel decoder bank has locked to in the passband, with the text decoded on each channel. This is what the left-hand browser panel shows, and it copies stations far too weak for the waterfall to show. operations: channels (list of {channel, freq, active, text}; text accumulates since the last clear, a newline marks a lost-and-regained

• controls

  fldigi operating controls (the AFC / SQL / Rev / Lock / RxID / TxID buttons) and status. operations: get/set/toggle_afc, get/set/toggle_squelch (SQL), get/set/inc_squelch_level, get/set/toggle_reverse (Rev), get/set/toggle_lock (Lock), get/set/toggle_rxid (RxID), get/set/toggle_txid (TxID), get_status1, get_status2, get_trx_status, get_trx_state.

• diagnostics

  Host + network diagnostics for troubleshooting connectivity.

• fldigi_call

  Escape hatch: call ANY fldigi XML-RPC method by dotted name (e.g. 'rig.get_mode').

• flmsg

  flmsg (message forms) interworking. operations: online, available, transfer, squelch, get_data (RX data since the last query).

• frequency

  RF frequency and waterfall sideband. operations: get, set (value=Hz), increment (value=Hz), get_sideband, set_sideband (value='USB'|'LSB').

• io

  ARQ / KISS I/O port. operations: in_use (which port is active), enable_kiss, enable_arq.

• legacy

  Deprecated fldigi methods, kept so the whole catalog is reachable. Each has a current equivalent, which you should prefer: get/set_sideband -> frequency get/set_sideband; rsid -> controls toggle_rxid; get/set_rig_name, get/set_rig_frequency, get/set_rig_mode(s), get/set_rig_bandwidth(s) -> the rig tool; log_get_sideband -> frequency get_sideband; flmsg_online/available/transfer/squelch -> the flms

• log

  Logbook (QSO / contest) fields. operations: get (field=...), set (field=..., value=...), clear, last_record, all_records.

• modem

  Operating mode (the fldigi "Op Mode" menu) and modem settings. operations: get, list, get_id, get_max_id, set (value=mode name e.g. 'BPSK31'), set_by_id (value=id), get_io_names (modems usable for KISS/ARQ I/O), get/set/inc_carrier, get/set/inc_afc_range, get/set/inc_bandwidth, get_quality, search_up, search_down, olivia_get/set_bandwidth, olivia_get/set_tones.

• navtex

  NAVTEX / SitorB mode. operations: get_message (value=timeout seconds), send_message (value=text).

• rig

  Rig (CAT) control via flrig/Hamlib/RigCAT. operations: get/set_name, get/set_frequency (value=Hz), get/set_mode (value=name), get_modes, set_modes (value=[...]), get/set_bandwidth, get_bandwidths, set_bandwidths (value=[...]), get/set_notch, enable_qsy (value=1|0), set_smeter / set_pwrmeter (value=int, drives fldigi's meter display).

• signal_hunt

  Find and name the signals in the receiver audio and rank them the way a contest operator reads the waterfall: the station that sits still and calls CQ scores highest.

• spot

  Spotting / PSK Reporter. operations: get_auto, set_auto (value=bool), toggle_auto, pskrep_count.

• status

  Snapshot: version, modem, frequency (Hz), TX/RX state, transmit gate, region, band.

• text

  RX/TX text and data. operations: read (decoded RX text; start/length), rx_length, get_rx (value=[start, length], the raw byte range), clear_rx, add_tx (value=text), add_tx_queue, add_tx_bytes (value=text or bytes), clear_tx, get_rxtx_data, get_rx_data, get_tx_data.

• transmit

  Transmitter control. operations: tx, tune, rx, abort, disable_tx, enable_tx, run_macro (value=id), get_max_macro_id, send (text=...), and timing information: tx_timing (value=test string), char_rates, char_timing (value=one character); both timings return 'samples : sample rate : seconds'.

• tune_to

  Set fldigi to a signal_hunt candidate: modem by fldigi name (e.g. 'RTTY', 'BPSK31', 'OLIVIA-8/250', 'MFSK16', 'DOMEX11', 'MT63-500'), the audio carrier, AFC on, and RxID off by default so another station's RSID burst cannot retune the modem mid-pass. Read the result with `text` read after 20 seconds; `modem` get_quality says whether it locked. Does not transmit.

• wefax

  WEFAX (weather fax) mode. operations: state, skip_apt, skip_phasing, tx_abort, end_reception, start_manual_reception, set_adif_log (value=bool), set_max_lines (value=int), get_received_file (value=timeout), send_file (value=[filename, timeout_seconds]).

• Code scan17 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitylocal package, no credentials required12/15
• Maintenancelast push 16 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Safety score

92/100

higher than 95% of 48,255 servers

Tools

21

the typical server has 7

Tools that change things

0%

typical: 0%. Fewer write tools means less an agent can break

Downloads a week

84

more than 59% of 12,191 servers with a package

Fldigi: common questions

Is Fldigi MCP server safe?

Yes, by our scan: it is graded A (92/100). Read the Fldigi safety report

How do I install Fldigi?

It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.

Does Fldigi need an API key?

No secret keys are declared. It reads 5 settings from the environment.

Is Fldigi maintained?

The last commit was 36 days ago (2026-09-29). The latest release is v0.3.1.

How does Fldigi compare with other MCP servers?

safety score 92/100 (higher than 95% of 48,255 servers); tools 21 (the typical server has 7); tools that change things 0% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.