MorphaReels

Delete a video, image, text, or shape LEAF layer. Errors on a group.<id> (dissolve it with ungroup_layers instead) and on a pinned layer such as the canvas backdrop. Deleting a video layer also takes everything welded to that clip: its welded audio overlay(s) and its welded caption lines, both of which derive their timing from the clip's trim and have no meaning without it.

Remove the speed-ramp keyframe at `frame` (a PROJECT-timeline frame — the same value add_speed_keyframe and inspect_layers report) on a video layer. Removing the last keyframe clears the speed_keyframes array entirely (restoring 1× playback).

Rename a group. Pure cosmetic — labels appear in the Inspector and describe_video output.

Set the human-readable name of a video / image / shape / text layer — the label shown in the Inspector, and the basis for the layer's auto-derived <morpha-video> embed attribute (so renaming a layer to "caption" makes the embed attribute `caption`). Pass an empty string to clear the name. For groups use rename_group.

Update a project's human-readable name (shown in the editor's project picker). Pass an empty string to clear the name and fall back to the id. Doesn't touch any layers, animations, or styles — only the picker label.

Rename a saved version's human-readable label (what the user sees in the picker). The `v<N>` partner-facing identifier is unaffected — only the display name changes. Accepts the version's UUID `id` or the `v<N>` shorthand. Empty / whitespace-only names are rejected.

Rename an existing workspace. Requires an owner or admin role in it (the same roles that may change its membership); an editor or viewer is refused. Takes the workspace id from list_workspaces. Touches only the label — membership, projects and roles are unchanged.

Check a server render started by render_video, and get its download link. Returns { ok: true, status: 'not-ready' } while it is still rendering (wait and call again), or { ok: true, status: 'ready', data: { downloadUrl, editorUrl, expiresAt, videoSeconds, scale } } once the MP4 is ready. `downloadUrl` is a plain https link needing no Morpha account — give it to the person; it stops working when the render is deleted at `expiresAt` (7 days). A render that failed answers ok:false with a plain reason and uses no allowance. Only the account that started a render can read it.

Render the project to an MP4 on Morpha's servers, for an agent that has no browser to drive (a chat app, a Linux box). Returns { renderId, status: 'rendering', next } — call render_status with that renderId after about 30 seconds. It needs a subscription and draws on the account's render allowance, so a longer composition and a larger scale each use more of it. The editor renders the same MP4 with no allowance: every project result carries an editorUrl, and there the person can choose Share, then Download (Render MP4 on a phone), free and with no watermark. Renders at 2x the canvas by default, the same as the editor; pass scale: 1 for the canvas's own size, which is faster and uses less allowance. The allowance is checked before the render starts, so a render that would exceed it is refused up front rather than failing partway. Refused for a composition longer than 30 minutes, when the remaining allowance will not cover it, or while 3 renders are already running for this account. The finished file stays downloadable for 7 days, then it is deleted; the project stays and can be rendered again. The render downloads the project's fonts from their hosts, including a custom font's own URL (set_custom_font). Reference: https://morphareels.ai/docs/tools#rendervideopage-scale

Move a layer within its parent's siblings. newIndex is 0-based among siblings (root list when ungrouped, or the parent group's children when nested). 0 = bottom of that subtree; last = top.

Move a page from `from_index` to `to_index`. The remaining pages shift to fill the gap; active_index is rewritten so it keeps pointing at the same page it did before the move. Fails on out-of-range indices.

Bring a project back from Recently deleted, with its versions, files, workspace and sharing as they were. Returns { projectId, name }. Scheduled social posts cancelled by the delete stay cancelled. Requires edit access, as delete_project does; take the id from list_trash.

Load a saved version over the live project. Accepts either the version's UUID `id` or the `v<N>` shorthand (e.g. `"v6"` finds the bookmark with version_number=6); auto-snapshots are addressable by UUID only. Without `page_index` this replaces the ENTIRE project (every page) — an auto checkpoint named `before restore: …` is saved first whenever the current state has unsaved changes, so the overwritten state stays recoverable. With `page_index` it restores ONLY that page: the page is matched across versions by its stable id and replaced verbatim (canvas size and name included); other pages are untouched and the write is compare-and-swapped against concurrent edits. Errors if the version predates that page — restore the whole version instead. A restored page may reference assets deleted since the snapshot; those render as missing. An open editor reconciles the result into the live project within a few seconds — no refresh needed.

Return horizontal 'safe band' y-ranges of the canvas where a clip's burned-in video text (subtitles, lower thirds, titles) does NOT appear, plus the inverse 'text bands' (where it does). Reads the OCR cache built at clip-upload time (see detect_text_regions). Coordinates returned in BOTH source pixels and CANVAS pixels — canvas coords already account for the video layer's fit/anchor/position. Use to lay out captions, titles, callouts so they never collide with the video's own text. This is about the clip's own burned-in text: where TikTok and Instagram Reels cover the canvas with their UI is describe_video's platform_safe_area. Returns { ok: true, status: 'ready' | 'not-ready', data: { bands, safeBands, textBands } }.

Save a version of the current project state. The person flicks between versions in the editor to compare or roll back, so one version per logical change-set (not one per tool call) is what they can revisit. `name` is shown verbatim in the version picker, so a short description reads best (e.g. "add slide-in animation").

Switch which page is ACTIVE — the page the content tools target. Subsequent describe_video / inspect_layers / all content tools read and write this page until the active page changes again. Pages are addressed by 0-based index from describe_video's pages block. Selecting the already-active page is a harmless no-op; fails on an out-of-range index.

Resize the ACTIVE page's canvas to width × height pixels. The composition is scaled UNIFORMLY to fit the new frame (a single factor s = min(newW/oldW, newH/oldH), so nothing distorts — a circle stays a circle) and then re-centred so the old composition centre maps to the new canvas centre. Every layer's position, size, group pivots, and x/y/width/height keyframes follow this fit+recentre; same-aspect resizes scale exactly, aspect changes letterbox the content centred. Each page owns its size, so this leaves sibling pages untouched — select_page then set_canvas_size again to resize another one. Common sizes: 1080×1920 (9:16 Reels/TikTok/Shorts), 1080×1350 (4:5 Instagram), 1080×1080 (1:1 square), 1920×1080 (16:9 YouTube).

Play a clip slower or faster at a CONSTANT rate — the normal way to retime a clip. 1 = source speed, 0.5 = half speed, 2 = double speed; range [0.1, 8]. The trim is unchanged, so the clip's length on the timeline changes to suit: at 0.5x it occupies twice as many frames, at 2x half as many. Audio is time-stretched with pitch preserved. Use add_speed_keyframe instead only when the rate must CHANGE over the clip (a ramp).

Register a typeface Morpha does NOT ship, so text layers can use it by family name via font_family (exactly like a built-in family). Families already in the built-in catalogs (anything list_fonts returns from google/bunny/fontshare/fontsource/velvetyne) are REJECTED — they need no registration; just set font_family to them directly. `src` is EITHER a full URL (https://…) OR a font file (.woff2/.woff/.ttf/.otf) already uploaded to the project in the editor: pass the filename the upload returned. Like add_image_layer, this does NOT verify an uploaded filename exists. Dedupes by family+weight+style, replacing a matching face. After registering, set a text layer's font_family to this family (add_text_layer / set_layer_text). NOTE: a pasted URL only loads if that host sends permissive CORS headers — uploading the font (served same-origin) is the robust path. A URL is not fetched when this tool runs: Morpha's renderer and every browser that opens the project download it later. Reference: https://morphareels.ai/docs/tools#setcustomfontfamily-src-weight-style

Author an EXPLICIT composition length in seconds, pinning it (duration_authored=true) so the auto-fit no longer drives it. Morpha normally DERIVES the comp length from content (the furthest keyframe / video window / audio end); this overrides that with a fixed length — the stage becomes a fixed canvas you author into, and content past the end is kept but not played or exported. 1-second floor, no ceiling. Use it to shorten a comp to a target length (e.g. a 15-second cut) or to reserve a longer stage than the current content fills. Call fit_duration_to_content to release the pin.

Replace the project's embed allowlist — the hostnames permitted to load this project through the public <morpha-video> embed. Pass the full desired list; it overwrites the previous one. An empty array turns embedding OFF (the public embed endpoint 404s the project). Each entry is normalized to a bare lowercased hostname (scheme, port, and path stripped, e.g. "https://example.com/x" → "example.com"); duplicates are dropped. Morpha sends the listed websites no request: the list decides which of them may load the project, so any page on an allowed host can show it. The embed serves only saved bookmarks (save_version), never unsaved edits, and leaves out who the project is shared with. Reference: https://morphareels.ai/docs/tools#setembedoriginsorigins

Place an embedded morpha band on the host timeline: set its TIME ORIGIN (the frame it starts). The band's whole inner reel plays relative to this frame, so its intro animations fire when the band appears instead of at 0:00 (the fix for 'the embedded intro doesn't animate'). Keeps the band's current window length; if it had none, the band spans from start to the composition end. Pass the band group's id (from describe_video — a group with morpha:true).

Set a group's backdrop rect size. The rect is centred on (pivotX, pivotY) in group-local space and transforms with the group. Either dimension at 0 hides the backdrop entirely.

Move an element into a group (or out to root). Refuses to place a group inside its own descendants.

TRIM a group's own visible window — the [start, start+duration) range over which the group and its subtree are drawn. The contents are NOT moved or deleted: this clips what is shown, so use it to hide the head or tail of a whole section. Writing a window overrides the group's derived contents-hull from then on. Two safety corrections apply automatically: the group's OWN keyframes are compensated for the change in start so its animation doesn't jump (reported as keyframesCompensatedBy), and the duration is grown if needed so the window can never hide one of the group's own authored keyframes (reported as grownToCoverKeyframes). To MOVE the group and its contents instead, use shift_group.

Repoint an existing image layer at a different uploaded asset — keeps the layer's id, position, size, animations, and styles; only the bitmap changes. The image must already be uploaded (upload_image for a web URL or a file attached in the chat; the editor for a file from the person's disk); pass the `filename` the upload returned, and its `name` as the label. Use this to swap a layer's image WITHOUT losing its keyframes — `remove_layer` + `add_image_layer` would mint a new id and drop the animations.

Add or overwrite MANY keyframes across MANY layers in ONE call — functionally equivalent to N add_keyframe calls but with one HTTP/MCP round-trip. Pass an array of entries; each entry has the same fields as add_keyframe. Validated atomically: any invalid entry rejects the whole batch. Use this whenever you'd call add_keyframe more than a couple of times (rippling grids, twinkling starfields, staggered text reveals).

Set (or replace) a layer's timeline BLOCK — the [start, start+duration) window it exists for. The layer is drawn ONLY inside that window, and its animation keyframes are sampled RELATIVE to the block start, so moving or trimming the block re-anchors its intro instead of leaving it behind. This is how a layer 'starts' at a point like an iMovie clip rather than being present for the whole composition. Works on any leaf or group. Frames are in the layer's parent timeline (composition frames at root; band-local inside an embedded morpha band). To place a whole embedded reel, use set_embed_start.

Set a layer's fill. The canvas backdrop is the pinned is_background image_layer (its element id is exposed via describe_video as background.elementId; the literal 'background.canvas' is also accepted as a synonym); null is rejected on the backdrop. Shapes require a Fill (null/missing is rejected). Image / video / text / group layers accept a Fill object (or `#rrggbb` hex) to paint a backdrop, or `null` to clear it — clearing removes the layer's fill colour keyframes too, so an animated backdrop really does go away. Shapes paint their body; image/video paint behind the bitmap; groups paint a rect centred on the pivot sized by (box_width, box_height). REFUSED on a layer whose fill is ANIMATED (it has colour keyframes): the track wins at every frame, so a plain fill write would be invisible. Change it at a frame with add_color_keyframe, or pass clear_animation:true to replace the animation with this fill.

Edit an existing text layer (text.<id>). Patches its text content, font, size, colour, and full type styling — pass only the fields you want to change. Does NOT create layers and does NOT touch image layers; use add_text_layer to make a new one. `font_family` is a Google Fonts family name (e.g. "Anton", "Bebas Neue"). `text_size` is the font size in px (omit to keep the current size). `text_color` is #rrggbb. Styling: font_weight (100-900, e.g. 800 for a black/heavy logo look), font_style (italic), text_transform (uppercase/lowercase), letter_spacing (px, may be negative for tight tracking), line_height (multiplier), text_align, text_autofit ("wrap" default = fixed size + word-wrap, the size you set is what renders; "fit"=auto-size to fill the box, grows and shrinks; "shrink"=legacy shrink-only), text_valign (top/middle/bottom block alignment), an outline via stroke_width + stroke_color, and a text_shadow. To make text MASK another layer (video/image-filled letterforms) use set_matte_source with this layer's id as the matte source. Only `elementId` is required. The result carries text_box, fits and a warning when the text runs past the canvas or the safe area (see add_text_layer).

Set how a layer ENTERS at the start of its on-timeline window and LEAVES at the end, instead of popping. The transition is EDGE-RELATIVE — only a length and a look are stored — so it rides the edge through every later trim, slide or clip retime. Prefer this over fade_layer / apply_preset whenever the intent is 'enters and leaves nicely': those write opacity keyframes at ABSOLUTE frames, which strand themselves the moment the edge moves, and clutter the timeline lanes. A layer created WITH a `block` is born carrying a short fade at each edge — whether you passed the block or the editor minted one — so check `inspect_layers` before adding one, rather than assuming there is none. Layers created before this default existed, and any edge cleared to "cut", carry nothing and do need setting. A layer with NO block is always-present, has no edges, and a transition on it is inert. Video clips default to a hard cut, because a hard cut between shots is the grammar of short-form video. kind "cut" clears the edge back to a hard cut. The length is a request: when the window is too short to hold both ramps they are squeezed proportionally at render time, and the stored values are left intact.

Show or hide a layer instantly by writing a single opacity keyframe (1 or 0) at frame 0.

Set the project's loop section: the whole composition repeats once per value, with one field of one layer varying across the repeats. Builds one pass per value, each setting `field` of `elementId` to that value — e.g. a caption text layer cycling through several strings. Pass an empty `values` array to clear the loop (the comp plays once).

Set (or clear) a track matte — the host shows only where the matte source is opaque. The HOST can be a leaf (image.<id>, video.<id>, shapes.<id>, text.<id>) OR a group.<id> (a group is a layer of sorts): a group host clips ALL its composited children to the source shape's path — e.g. a marching chevron strip + black backing shown only inside an arrow / band shape. For a leaf host the source can be any leaf (use a text.<id> source for video-/image-filled letterforms); for a group host the source must be a shape (shapes.<id>). The source is CONSUMED: it stops painting as a layer of its own, so do NOT hide it or set its opacity to 0 (an invisible stencil empties the mask and the host vanishes). It has no time window of its own: it follows the host's, and attaching drops its block and edge transitions (`source_window_dropped` in the result). Its position, scale, rotation and keyframes shape the mask. Pass null to clear.

Set the rotation / scale pivot anchor for an image, video, shape, or text leaf. Picks one of the 9 standard bbox anchors — corners, edge midpoints, or centre — so the layer rotates and scales around that point instead of its centre. The pivot is normalized to the bbox, so resizing the layer keeps the pivot anchored to the same corner / edge / centre. Static (not animated). For groups, use move_layer with x/y to set the group's absolute pivotX/pivotY instead.

Set style fields on a layer. Only the fields you pass are changed; omit a field to leave it untouched. Covers border/radius/shadow (including borderAlign — inner|center|outer border position) plus image-only fields: fit (stretch|cover|contain), anchorX/anchorY (0..1, where the source anchors when cropping/letterboxing under cover/contain), tintColor (#rrggbb) + tintStrength (0..1) for a colour overlay painted source-atop, and alphaMask (linear gradient — see below) for a multiplicative alpha fade across the layer.

Add or update the rounded background box behind a TEXT layer (text.<id>) in one call — sets the backdrop fill plus the box's padding, corner radius, and optional stroke. Pass only the fields you want to change. New text layers are already text_autofit "hug", so padding alone shrink-wraps the box to the text — ideal for caption / sticker chips; set_layer_text(text_autofit:"hug") is only needed when adding a box to an OLDER layer still on "wrap". THIS IS HOW YOU BUILD A BUTTON: a button / CTA / chip / tag / pill / labelled badge is ONE text layer with a native background, never a rounded-rect shape with a text layer parked on top — padding is what sizes the box around the label, so the two can't drift apart when the text or the scale changes and the user drags one layer instead of two. The one exception: the box is NOT painted on CURVED text (a straight box behind a bent line reads as broken), so an arc-shaped chip genuinely needs a shape behind it. Pass fill null to remove the box. Text layers only; for shapes/images/video use set_layer_fill. Returns text_box and fits for the padded box, with a warning when it runs past the canvas or the safe area.

Set the extrapolation mode for one property's animation track. Modes: "hold" (default — holds the boundary keyframe's value past the ends), "loop" (wraps frames past the last keyframe back to the first, restarting the animation), "ping-pong" (alternates direction each cycle, bouncing back and forth), "cycle" (wraps like loop but each cycle adds the boundary delta — used for endless rotation or scrolling). Has no effect on tracks with fewer than 2 keyframes.

Repoint an existing video layer at a different uploaded clip — keeps the layer's id, position, size, animations, styles, and trim window; only the source mp4 changes. The clip must already be uploaded (the editor's Add video); pass the `filename` the upload returned, and its `name` as the label. Use this to swap a video layer's source WITHOUT losing its keyframes.

Mute or unmute a video layer's baked audio (silenced in both preview and export). The processing pipeline's audio-split step sets this true after demuxing the clip's audio into a standalone overlay track (NLE-style linked A/V), so the source audio doesn't double with the overlay. Pass muted:false to restore the baked audio.

Patch a video layer's trim window: source_in_frame (frame in source to start), source_out_frame (frame in source to stop, or null for natural end), timeline_start_frame (where on the project timeline the slice begins). Only the fields you pass are changed. Use this to clip out a segment of a source mp4: duplicate the layer first (in the editor) so you have two pointing at the same clip, then set disjoint source windows.

MOVE a group and everything inside it along the timeline, keeping its internal timing intact — the 'slide this whole section later' operation. A plain group is a relative CONTAINER: it has no window of its own, so on the timeline it spans the hull of its contents, and moving it slides the whole subtree as one rigid body. `start` is the ABSOLUTE frame the group's window should end up at, not a delta, so calling it twice with the same value is a no-op. Descendants keep their spacing; the move stops when the earliest thing inside reaches frame 0. Welded caption lines are deliberately left behind (they follow their clip's speech, not this group), and an embedded morpha band moves as one unit. Fails when the group is empty or holds an always-present layer — there is no bounded window to move. To CLIP what is shown of a group rather than move it, use set_group_window; for a single layer use set_layer_block.

Bulk-shift every keyframe's VALUE on one property of one layer by `delta`. Mirrors the 'select all keyframes + nudge layer' gesture in After Effects / Premiere / FCP — preserves the relative spacing of the animation but slides the whole curve. Keyframe TIMES are untouched. Use for 'move all x by -30px' on a complex animation, retiming a fade by adjusting its base opacity, rotating an existing wobble by 10°, etc.

Show the project in the chat as a live preview that plays and follows every edit; a multi-page project turns its pages in the preview. Call it once per project, right after creating or opening it; later edits appear in the preview without calling again. Answers { name, pages, placards, durationSeconds, editorUrl }. Its result also carries one picture per page, a Morpha placard shaped like that page (up to 12, in page order): use it wherever you show a page, and never make or fetch a picture of your own. The preview lasts 30 minutes; call again if the person comes back later. `controls` picks the player's controls: 'full' (the default: play, a scrub bar, the time, sound and fullscreen) or 'play' (the play button alone, for a preview that should look like a plain video). In a client that cannot render a preview, give the person the editorUrl instead.

Split one caption line into two at a COMPOSITION frame strictly inside its window (in the editor this is the playhead). The right half is a full clone — style, band geometry, weld — and the text divides at the word gap nearest the split point (a single-word line keeps its text on the left; the right half starts empty). A welded line stays welded on both halves (the frame converts to the clip's source timeline); a standalone line splits its block. Returns { left, right, splitFrame }. Retime the halves afterwards with set_layer_block; fix the wording with set_layer_text.

Return the cached transcript of a clip's audio. Generated client-side in the Morpha editor (transformers.js Whisper) and cached in R2 next to the clip; if absent, it is produced when the clip is opened in the editor. Independent of the clip's video codec — runs on the audio track only, so it works on HEVC/AV1 clips that the OCR pipeline can't decode. Returns { ok: true, status: 'ready' | 'not-ready', data: { text, word_count, words: [{ word, start, end }], vtt? } }.

Dissolve a group: its children are spliced into the group's parent at the group's old position. The group's animation tracks are discarded — children survive at their last positions but inherit none of the group's keyframes.

Patch an existing audio overlay. Only the fields you pass are changed. Pass endFrame:null to clear it (revert to natural-length playback).

Upload an audio track into a project from a public http(s) URL or a file attached in the chat, fetched server-side — the ONLY way to get an audio file's bytes into a project over MCP/HTTP (add_audio_overlay / update_audio_overlay only reference a file that is already uploaded). Pass `url` for a public http(s) link, or `file` for a file the person attached in the chat (a host that supports file inputs, such as ChatGPT, fills `file` with a temporary download link itself; do not ask the person for a URL to something they have attached). The target is the URL you pass and nothing else: Morpha's Worker fetches it with a plain HTTP GET, following redirects, and identifies itself as "Morpha/1.0 (+https://morphareels.ai; [email protected])". No third-party API is involved. The worker downloads the .mp3/.m4a/.wav/.ogg/.aac, stores it in the project's asset bucket under a new id, and returns { filename, name, sizeBytes, contentType }. Then pass the returned `filename` (the file's id, never shown to a person) to add_audio_overlay (add a second track) or update_audio_overlay { id, filename } (replace an existing track's file — find the id via describe_video's audio_overlays), with `name` as the track's name. A url must be a direct, publicly-fetchable http(s) link (not an auth-walled page). Buffered in Worker memory, so capped at 50 MB. A file on the person's own disk is uploaded in the editor. Reference: https://morphareels.ai/docs/tools#uploadaudiourl-file-name

Upload an image into a project from a public http(s) URL or a file attached in the chat, fetched server-side. Pass `url` for a public http(s) link, or `file` for a file the person attached in the chat (a host that supports file inputs, such as ChatGPT, fills `file` with a temporary download link itself; do not ask the person for a URL to something they have attached). The target is the URL you pass and nothing else: Morpha's Worker fetches it with a plain HTTP GET, following redirects, and identifies itself as "Morpha/1.0 (+https://morphareels.ai; [email protected])". No third-party API is involved. The worker downloads the .png/.jpg/.jpeg/.gif/.webp/.svg, stores it in the project's asset bucket under a new id, and returns { filename, name, sizeBytes, contentType, width, height }: pass the returned `filename` (the file's id, never shown to a person) to add_image_layer, and `name` is what people see; `width` and `height` are the picture's own pixel size (null when its header did not say), so size the layer from them or pass add_image_layer one side and let it keep the aspect. This tool does not search for images: pass a direct image file URL, such as one the person has given you, and respect the licence its source states. A url must be a direct, publicly-fetchable http(s) link (not an auth-walled page). SVGs are rejected if they carry a <script>, an inline event handler, a <foreignObject>, a javascript: URL, or an external resource reference — supply a static, self-contained SVG. Buffered in Worker memory, so capped at 16 MB. A file on the person's own disk is uploaded in the editor. Reference: https://morphareels.ai/docs/tools#uploadimageurl-file-name