PostFader MCP server

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

• audio_analyze_file

  Measure level, spectrum, dynamics, stereo, and optional pitch of one render.

• audio_analyze_masking

  Measure per-band spectral overlap and vocal-minus-instrument level margins.

• audio_compare_files

  Measure band deltas over the aligned, loudness-matched common overlap.

• audio_find_recent_bounces

  List the newest audio files in FL Studio's Rendered, Audio, and Projects folders.

• copilot_capture_readonly_inspection

  Capture a compact project, mixer, and effect inspection report.

• fl_apply_verified_batch

  Apply a closed-union batch after one session preflight, without replay.

• fl_find_empty_pattern

  Find the first default-empty pattern without changing the current pattern.

• fl_get_capabilities

  Report direct, partial, unavailable, and unvalidated integration paths.

• fl_get_plugin_preset_count

  Read FL's authoritative preset count for one loaded plug-in.

• fl_get_project_history

  Read undo/redo bounds, current history position, hint, and dirty state.

• fl_get_project_summary

  Read project metadata, counts, dirty state, version, and transport state.

• fl_get_selected_range

  Read raw endpoints and PPQ without claiming meter or rendering semantics.

• fl_get_step_sequence

  Read an explicit current-pattern/channel grid and its conflict digest.

• fl_get_transport_state

  Read playback, recording, loop mode, position, and song length.

• fl_inspect_mixer_track

  Read one track's state, effects, built-in EQ, and outgoing routes.

• fl_list_channels

  List globally addressed channels, mix state, routing, and generator identity.

• fl_list_mixer_tracks

  List mixer tracks, current levels, selection state, and loaded effects.

• fl_list_patterns

  List pattern identity, length, current state, and empty/default status.

• fl_list_playlist_tracks

  List every one-based Playlist track and its controllable state.

• fl_redo

  Move to the next absolute undo-history position and verify it.

• fl_route_channel_to_mixer

  Set one global channel's absolute mixer destination and verify it.

• fl_select_channel

  Select one global channel exclusively and verify the complete selection.

• fl_select_mixer_track

  Make one mixer track active and verify the active-track getter.

• fl_select_pattern

  Select one pattern and verify FL's current-pattern getter.

• fl_select_plugin_preset

  Navigate to an exact preset and require later-idle-tick identity readback.

• fl_set_channel_identity

  Set a channel's name and/or color with per-field readback proof.

• fl_set_channel_mix

  Set channel volume, pan, and/or mute with per-field readback proof.

• fl_set_channel_pitch

  Set normalized channel pitch and report normalized/semitone readback.

• fl_set_channel_solo

  Set a global channel solo state and verify it on a later FL tick.

• fl_set_loop_mode

  Set Pattern or Song loop mode without exposing FL's toggle-only API.

• fl_set_metronome

  Set the metronome absolutely and prove the later UI state.

• fl_set_mixer_arm

  Set recording arm with one bounded toggle and later-tick readback.

• fl_set_mixer_color

  Set a mixer color, accepting FL-owned differences in the high byte.

• fl_set_mixer_mute

  Set one track's mute state and report the readback FL gave on a later tick.

• fl_set_mixer_name

  Rename one mixer track.

• fl_set_mixer_pan

  Set one mixer pan and report the readback FL gave on a later tick.

• fl_set_mixer_sendwrite action

  Route one mixer track to another, or stop routing it there.

• fl_set_mixer_send_levelwrite action

  Set how much of one track reaches another. 0.8 is unity, as on the fader.

• fl_set_mixer_solo

  Set one mixer track's solo state and verify it on a later FL tick.

• fl_set_mixer_stereo_separation

  Set stereo separation and report FL's later-tick readback.

• fl_set_mixer_volume

  Set one mixer fader and report the readback FL gave on a later tick.

• fl_set_mixer_volume_db

  Search FL's fader curve and prove the requested dB value on a later tick.

• fl_set_pattern_identity

  Set pattern name and/or color with per-field later-tick proof.

• fl_set_pattern_length

  Set pattern length using Image-Line's API 39+ getter/setter pair.

• fl_set_playing

  Set playback to an absolute state and verify it on a later FL idle tick.

• fl_set_playlist_track_identity

  Set Playlist name and/or color with per-field later-tick proof.

• fl_set_playlist_track_state

  Set Playlist states; toggle-only selection is dispatched at most once.

• fl_set_plugin_param

  Set one plug-in parameter; verified from FL's display string changing.

• fl_set_plugin_param_display
• fl_set_plugin_param_option

  Set a parameter that shows words rather than numbers: Key, Scale, Input Type.

• fl_set_precount

  Set recording precount absolutely and verify it on a later FL tick.

• fl_set_recording

  Set recording absolutely; FL's toggle is dispatched at most once.

• fl_set_song_position

  Set a stopped transport's absolute normalized playhead position.

• fl_set_step_sequence

  Set absolute current-pattern cells only if the observed grid digest still matches.

• fl_set_tempo

  Set project tempo while stopped and verify BPM on a later FL idle tick.

• fl_set_time_signature_numerator

  Set and prove beats per bar from FL's PPB/PPQ getter pair.

• fl_set_track_eq

  Set gain and/or frequency on one built-in EQ band; at least one is required.

• fl_set_write_modewrite action

  Enable or disable writes for this bridge session without restarting FL.

• fl_stop

  Stop playback, set normalized position to zero, and verify both fields.

• fl_trigger_note

  Audition a global channel with a bounded note-on/off dispatch receipt.

• fl_undo

  Move to the previous absolute undo-history position and verify it.

• mix_apply_plan

  Apply a plan once through the verified batch kernel.

• mix_create_gain_stage_planwrite action

  Create, but do not apply, dB-fader changes from a peak watch.

• mix_create_planwrite action

  Store a session-bound closed-union plan; no project value changes.

• mix_doctor

  Diagnose a real bounce with explicit policy thresholds and no mutation.

• mix_finish_assessmentwrite action

  Run the end-to-end read-only finish assessment and stop at user export.

• mix_get_peak_watch

  Read cumulative sampled peaks without stopping the watch.

• mix_get_plan

  Read one process-local reviewable plan.

• mix_inspect_plugin_compatibility

  Report which loaded effects have known parameter-role adapters.

• mix_list_plugin_profiles

  List bundled parameter-role adapters and processing recipes.

• mix_masking_recommendations

  Recommend bounded dynamic remediation from sample-synchronous stems.

• mix_reference_recommendations

  Return bounded tonal review ranges only when alignment/readiness passes.

• mix_resolve_processing_intent

  Map an intent to loaded profiled controls without applying settings.

• mix_start_peak_watch

  Start a process-persistent sampled peak watch and return its first frame.

• mix_stop_peak_watch

  Stop one process-local watch and return its final aggregate.

• plugins_atlas_get_product

  Read one static Atlas product and its related descriptive records.

• plugins_atlas_inspect_loaded

  Match the target-aware live Track B inventory to static Atlas knowledge.

• plugins_atlas_recommend

  Rank static plug-in choices or stock alternatives without changing FL.

• plugins_atlas_search

  Search bundled static plug-in knowledge without contacting FL Studio.

• plugins_get_current_preset

  Read FL's current preset name and an index only when it is unique.

• plugins_inspect_pad_map

  Read generic pad, MIDI-note, color, empty, and mute observations.

• plugins_inspect_parameter_map

  Read a bounded page of exposed parameters; never marks unknown controls safe.

• plugins_list_presets

  Read one deterministic preset page without changing the plug-in.

• plugins_scan_loaded_plugins

  Inventory loaded plug-ins without inserting or changing anything.

• plugins_scan_parameters

  De-pad a whole plug-in in one call; prefer this over paging a VST.

• postfader_creation_readiness

  Aggregate all detectable setup blockers without changing FL Studio.

• postfader_execute_runwrite action

  Create and execute one task-scoped run until its plan completes or blocks.

• postfader_get_runwrite action

  Read a current or journaled run, its generated outputs and operation receipts.

• postfader_list_runs

  Find recent runs after an MCP restart without executing any operations.

• postfader_validate_runwrite action

  Validate a bounded Production Run and current capabilities without changing FL.

• processing_apply_plan

  Apply a semantic plan through one task-scoped verified Production Run.

• processing_plan

  Plan loaded-effect processing without enabling writes or mutating FL.

• sound_selection_apply

  Apply exact presets in deterministic order and stop on unknown or unverified outcomes.

• sound_selection_create_variationwrite action

  Return a section delta instead of replacing the existing palette.

• sound_selection_get

  Look up one process-local palette without treating expiry as a server error.

• sound_selection_history_reset

  Explicitly remove bounded local selection history; project state is unchanged.

• sound_selection_history_status

  Report the local history path, health, schema, and bounded record counts.

• sound_selection_inventory

  Read a compact loaded sound pool; Atlas-only products remain recommendations.

• sound_selection_plan

  Choose deterministic loaded-target assignments without changing FL or history.

• sound_selection_record_feedbackwrite action

  Update bounded local ranking feedback; silence is never inferred.

• Code scan96 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 5 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Grade history

• 2026-09-19restoreB → Ascore 92

PostFader: common questions

Is PostFader MCP server safe?

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

How do I install PostFader?

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

Does PostFader need an API key?

No secret keys are declared. It reads 3 settings from the environment.

Is PostFader maintained?

The last commit was 6 days ago (2026-09-14). The latest release is v10.0.0.