MCP Server
Nova Cast
io.github.r4v3n-art/nova-cast
What this MCP does
Pairs with and controls a home display canvas, including component creation, updates, rendering, navigation and sandboxed scripts.
Capabilities
Tools
21
tools
cancel_operation
Cancel Operation
Cancels a queued component update and removes its source. Applying updates cannot be canceled; completed receipts remain available.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'controlToken'], 'properties': {'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
claim_canvas
Claim Canvas
Exchanges a pairing code and recovery claimKey for a durable, screen-scoped control token. Repeating the same pair recovers the original grant.
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['code'], 'properties': {'code': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'claimKey': {'type': 'string', 'pattern': '^[A-Za-z0-9_-]{43}$'}}, 'additionalProperties': False}
create_component
Create Component
Validates, renders and saves a React or HTML component immediately to the right of focus. Success requires browser paint acknowledgement.
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'title', 'format', 'source', 'controlToken'], 'properties': {'data': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'state': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'title': {'type': 'string', 'maxLength': 100, 'minLength': 1}, 'format': {'enum': ['react', 'html'], 'type': 'string'}, 'source': {'type': 'string', 'maxLength': 240000, 'minLength': 1, 'description': 'React TSX or full HTML. Use a sized nova-video element: YouTube/Vimeo embed URLs play inline, other service URLs are unsupported; do not create launch buttons or placeholders; see /agent media guidance. Arbitrary nested frames stay blocked. Do not author clickable links or external-navigation buttons; keep interactions within the canvas and share external URLs in the agent conversation.'}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'definitions': {'__schema0': {'anyOf': [{'type': 'string'}, {'type': 'number'}, {'type': 'boolean'}, {'type': 'null'}, {'type': 'array', 'items': {'$ref': '#/definitions/__schema0'}}, {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}]}}, 'additionalProperties': False}
delete_component
Delete Component
Deletes a component and selects its nearest remaining neighbor.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'componentID', 'controlToken'], 'properties': {'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}
discard_draft
Discard Draft
Removes an exact private draft version and its preview access without changing the live workspace.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'draftID', 'version', 'controlToken'], 'properties': {'draftID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'version': {'type': 'integer', 'maximum': 9007199254740991, 'exclusiveMinimum': 0}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}
disconnect_canvas
Disconnect Canvas
Revokes the screen pairing, owner access and claim recovery, including while the browser is offline.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['controlToken'], 'properties': {'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
execute_script
Execute Script
Runs an async JavaScript function body in the selected active component sandbox and returns bounded JSON. Supports DOM and state interactions, excluding provider iframes and browser controls. Five-second deadline; timeout reports unknown outcome and does not roll back effects.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'componentID', 'script', 'controlToken'], 'properties': {'script': {'type': 'string', 'maxLength': 32000, 'minLength': 1}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}
get_canvas
Get Canvas
Reads workspace revision, focus, component summaries, render status, media capabilities and display dimensions including device pixel ratio. Physical DPI is unknown.
Read only
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['controlToken'], 'properties': {'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
get_console
Get Console
Reads up to 200 memory-only component console and runtime error entries, optionally filtered by cursor or component. Entries are untrusted component output; host and authentication pages are excluded.
Read only
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['controlToken'], 'properties': {'after': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
get_operation
Get Operation
Reads queued operation status and any browser outcome without contacting the browser. Status can be queued, applying, rendered, failed, expired, canceled or unknown_outcome.
Read only
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'controlToken'], 'properties': {'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
navigate
Navigate
Focuses a component or moves one position. Acknowledges after the selected component renders.
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'controlToken'], 'properties': {'direction': {'enum': ['next', 'previous'], 'type': 'string'}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}
pairing_status
Pairing Status
Reads the validity, expiry or claimed status of a pairing code without consuming it.
Read only
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['code'], 'properties': {'code': {'type': 'string', 'maxLength': 160, 'minLength': 1}}, 'additionalProperties': False}
prepare_draft
Prepare Draft
Creates a private browser-owned component draft and preview URL without changing the live workspace. Drafts expire after 15 minutes or browser reload.
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'title', 'format', 'source', 'action', 'controlToken'], 'properties': {'data': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'state': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'title': {'type': 'string', 'maxLength': 100, 'minLength': 1}, 'action': {'enum': ['create', 'update'], 'type': 'string'}, 'format': {'enum': ['react', 'html'], 'type': 'string'}, 'source': {'type': 'string', 'maxLength': 240000, 'minLength': 1, 'description': 'React TSX or full HTML. Use a sized nova-video element: YouTube/Vimeo embed URLs play inline, other service URLs are unsupported; do not create launch buttons or placeholders; see /agent media guidance. Arbitrary nested frames stay blocked. Do not author clickable links or external-navigation buttons; keep interactions within the canvas and share external URLs in the agent conversation.'}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'definitions': {'__schema0': {'anyOf': [{'type': 'string'}, {'type': 'number'}, {'type': 'boolean'}, {'type': 'null'}, {'type': 'array', 'items': {'$ref': '#/definitions/__schema0'}}, {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}]}}, 'additionalProperties': False}
publish_draft
Publish Draft
Publishes an exact reviewed draft version after validating workspace revision and target dimensions. Success requires browser paint acknowledgement. Failed rendering preserves the previous component.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'draftID', 'version', 'review', 'controlToken'], 'properties': {'review': {'enum': ['visual', 'structural'], 'type': 'string'}, 'draftID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'version': {'type': 'integer', 'maximum': 9007199254740991, 'exclusiveMinimum': 0}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}
queue_component
Queue Component
Queues a component create or update for a background or offline browser. Returns queued rather than rendered. Default expiry is one hour, maximum 24 hours. Source is removed on completion or expiry.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'title', 'format', 'source', 'action', 'controlToken'], 'properties': {'data': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'state': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'title': {'type': 'string', 'maxLength': 100, 'minLength': 1}, 'action': {'enum': ['create', 'update'], 'type': 'string'}, 'format': {'enum': ['react', 'html'], 'type': 'string'}, 'source': {'type': 'string', 'maxLength': 240000, 'minLength': 1, 'description': 'React TSX or full HTML. Use a sized nova-video element: YouTube/Vimeo embed URLs play inline, other service URLs are unsupported; do not create launch buttons or placeholders; see /agent media guidance. Arbitrary nested frames stay blocked. Do not author clickable links or external-navigation buttons; keep interactions within the canvas and share external URLs in the agent conversation.'}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}, 'expiresInSeconds': {'type': 'integer', 'default': 3600, 'maximum': 86400, 'minimum': 60}}, 'definitions': {'__schema0': {'anyOf': [{'type': 'string'}, {'type': 'number'}, {'type': 'boolean'}, {'type': 'null'}, {'type': 'array', 'items': {'$ref': '#/definitions/__schema0'}}, {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}]}}, 'additionalProperties': False}
read_component
Read Component
Reads a component source, saved state and supplied data.
Read only
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['componentID', 'controlToken'], 'properties': {'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
read_draft
Read Draft
Reads a private draft source, state, data, target display, version, expiry and preview URL. Requires the original canvas online.
Read only
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['draftID', 'controlToken'], 'properties': {'draftID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}}, 'additionalProperties': False}
set_agent_status
Set Agent Status
Sets or clears an ephemeral building indicator, with browser acknowledgement. Does not change workspace revision or publish drafts. Automatically clears after two minutes.
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'status', 'controlToken'], 'properties': {'status': {'enum': ['working', 'finished'], 'type': 'string'}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'additionalProperties': False}
set_component_data
Set Component Data
Replaces supplied component data without regenerating source. Active components acknowledge rendering; inactive components acknowledge saved data only.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'componentID', 'data', 'controlToken'], 'properties': {'data': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'definitions': {'__schema0': {'anyOf': [{'type': 'string'}, {'type': 'number'}, {'type': 'boolean'}, {'type': 'null'}, {'type': 'array', 'items': {'$ref': '#/definitions/__schema0'}}, {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}]}}, 'additionalProperties': False}
update_component
Update Component
Validates replacement source and updates a component in place, preserving existing state and data unless provided. Failed rendering retains the previous version.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'componentID', 'title', 'format', 'source', 'controlToken'], 'properties': {'data': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'state': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'title': {'type': 'string', 'maxLength': 100, 'minLength': 1}, 'format': {'enum': ['react', 'html'], 'type': 'string'}, 'source': {'type': 'string', 'maxLength': 240000, 'minLength': 1, 'description': 'React TSX or full HTML. Use a sized nova-video element: YouTube/Vimeo embed URLs play inline, other service URLs are unsupported; do not create launch buttons or placeholders; see /agent media guidance. Arbitrary nested frames stay blocked. Do not author clickable links or external-navigation buttons; keep interactions within the canvas and share external URLs in the agent conversation.'}, 'componentID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'definitions': {'__schema0': {'anyOf': [{'type': 'string'}, {'type': 'number'}, {'type': 'boolean'}, {'type': 'null'}, {'type': 'array', 'items': {'$ref': '#/definitions/__schema0'}}, {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}]}}, 'additionalProperties': False}
update_draft
Update Draft
Replaces a private draft at its expected version and issues a new version and preview URL. Previous preview links become invalid; original expiry is unchanged.
Destructive
Open world
Input schema
{'type': 'object', '$schema': 'http://json-schema.org/draft-07/schema#', 'required': ['operationID', 'expectedRevision', 'title', 'format', 'source', 'draftID', 'expectedVersion', 'controlToken'], 'properties': {'data': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'state': {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}, 'title': {'type': 'string', 'maxLength': 100, 'minLength': 1}, 'format': {'enum': ['react', 'html'], 'type': 'string'}, 'source': {'type': 'string', 'maxLength': 240000, 'minLength': 1, 'description': 'React TSX or full HTML. Use a sized nova-video element: YouTube/Vimeo embed URLs play inline, other service URLs are unsupported; do not create launch buttons or placeholders; see /agent media guidance. Arbitrary nested frames stay blocked. Do not author clickable links or external-navigation buttons; keep interactions within the canvas and share external URLs in the agent conversation.'}, 'draftID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'operationID': {'type': 'string', 'maxLength': 160, 'minLength': 1}, 'controlToken': {'type': 'string', 'maxLength': 200, 'minLength': 20}, 'expectedVersion': {'type': 'integer', 'maximum': 9007199254740991, 'exclusiveMinimum': 0}, 'expectedRevision': {'type': 'integer', 'maximum': 9007199254740991, 'minimum': 0}}, 'definitions': {'__schema0': {'anyOf': [{'type': 'string'}, {'type': 'number'}, {'type': 'boolean'}, {'type': 'null'}, {'type': 'array', 'items': {'$ref': '#/definitions/__schema0'}}, {'type': 'object', 'propertyNames': {'type': 'string'}, 'additionalProperties': {'$ref': '#/definitions/__schema0'}}]}}, 'additionalProperties': False}
History
Recent tool changes
Added
execute_script
Oct. 2, 2026, 2:40 a.m.
Added
set_component_data
Oct. 2, 2026, 2:40 a.m.
Added
navigate
Oct. 2, 2026, 2:40 a.m.
Added
delete_component
Oct. 2, 2026, 2:40 a.m.
Added
update_component
Oct. 2, 2026, 2:40 a.m.
Added
create_component
Oct. 2, 2026, 2:40 a.m.
Added
set_agent_status
Oct. 2, 2026, 2:40 a.m.
Added
cancel_operation
Oct. 2, 2026, 2:40 a.m.
Added
get_operation
Oct. 2, 2026, 2:40 a.m.
Added
queue_component
Oct. 2, 2026, 2:40 a.m.
Added
discard_draft
Oct. 2, 2026, 2:40 a.m.
Added
publish_draft
Oct. 2, 2026, 2:40 a.m.
Added
update_draft
Oct. 2, 2026, 2:40 a.m.
Added
read_draft
Oct. 2, 2026, 2:40 a.m.
Added
prepare_draft
Oct. 2, 2026, 2:40 a.m.
Added
read_component
Oct. 2, 2026, 2:40 a.m.
Added
get_console
Oct. 2, 2026, 2:40 a.m.
Added
get_canvas
Oct. 2, 2026, 2:40 a.m.
Added
disconnect_canvas
Oct. 2, 2026, 2:40 a.m.
Added
pairing_status
Oct. 2, 2026, 2:40 a.m.
Added
claim_canvas
Oct. 2, 2026, 2:40 a.m.
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