app.perpetual.video
A local-first video editor that a browser agent can edit with you.
First seen 2026-11-05 · Last seen 2026-11-05 · Source: webmcp.com
Answer 9 · Act 22 · Transact 3 · Score: Not yet scored
Tool inspector
add_text
Add a text overlay to the timeline. Times are in seconds and default to fromSeconds 0 for 3 seconds. Position and size are in canvas pixels — call get_editor_state for the current canvas dimensions — and default to a centred band across 80% of the width. `row` is the timeline layer, 0 on top. Overlapping overlays on the same row are pushed apart automatically.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
content |
string | yes | — |
fromSeconds |
number | no | — |
durationSeconds |
number | no | — |
row |
integer | no | — |
left |
number | no | — |
top |
number | no | — |
width |
number | no | — |
height |
number | no | — |
rotation |
number | no | — |
fontSize |
string | no | — |
color |
string | no | — |
textAlign |
string | no | — |
Raw JSON schema
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"type": "object",
"properties": {
"content": {
"type": "string",
"minLength": 1,
"maxLength": 500
},
"fromSeconds": {
"type": "number",
"minimum": 0,
"maximum": 3600
},
"durationSeconds": {
"type": "number",
"minimum": 0.1,
"maximum": 3600
},
"row": {
"type": "integer",
"minimum": 0,
"maximum": 7
},
"left": {
"type": "number",
"minimum": -20000,
"maximum": 20000
},
"top": {
"type": "number",
"minimum": -20000,
"maximum": 20000
},
"width": {
"type": "number",
"minimum": 1,
"maximum": 20000
},
"height": {
"type": "number",
"minimum": 1,
"maximum": 20000
},
"rotation": {
"type": "number",
"minimum": -3600,
"maximum": 3600
},
"fontSize": {
"type": "string",
"maxLength": 20
},
"color": {
"type": "string",
"maxLength": 64
},
"textAlign": {
"type": "string",
"enum": [
"left",
"center",
"right"
]
}
},
"required": [
"content"
],
"additionalProperties": false
}
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