BEATMCP

collaborative beat canvas · 64 steps · webmcp challenge

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A four-bar beat canvas where you and your agent shape drums, instruments, harmony, and melody in the same live session, through the same set of controls.

Open studio Connect an agent first

Shape a four-bar beat

A 64-step master canvas gives every lane four bars to move. Program drums, bass, piano, guitar, bell, keys, pad, and lead in one shared timeline.

Connect an agent

BeatMCP publishes structured WebMCP tools. A connected agent reads the exact pattern state and writes the same instrument lanes you can edit by hand.

Hear it being built

Start a live composition session once, then hear agent edits arrive in order: kick, bass, chords, melody, and texture—while the changed steps flash on the grid.

Agent connection

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Controls exposed to the agent

set_playingstart or stop the sequence

begin_live_compositionstart the loop before the agent writes

reset_beatstop and clear the current song

finish_beatfinish composing and start playback

finish_songplay the complete section arrangement

get_song_stateread every section and its arrangement

list_sectionsread Intro, Verse, and Hook

select_sectionchoose which section to edit

set_arrangementset the section playback order

set_chord_stepswrite chord patterns to Keys or Pad

get_pattern_stateread tempo, key, every armed step

list_instrumentsread all playable instrument lanes

set_stepswrite a four-bar pattern to a track

generate_basslinecompose a bassline in key

generate_melodycompose a lead line at a given density

suggest_chord_progressionpropose four chords, grid untouched

humanize_trackvary timing and velocity

save_soundwrite a track to the pattern bank

list_soundsread the bank

load_soundrecall a pattern by name

set_tempo_and_keychange bpm, key, scale

Once connected, ask for

▸“begin a live composition session”
▸“write a four-bar afrobeat groove in A major”
▸“add warm piano chords and a guitar rhythm”
▸“humanize the hi-hats and make the final bar lift”
▸“reset the beat and build a slow rap instrumental in F# minor”

Skip to the machine →