Struct UIResourceContents 

pub struct UIResourceContents {
    pub uri: String,
    pub mime_type: String,
    pub text: Option<String>,
    pub blob: Option<String>,
    pub meta: Option<Map<String, Value>>,
}

UI Resource contents for delivery to the host

This represents the actual content of a UI resource that can be rendered. For HTML resources, the content is provided in the text field.

Fields

uri: String

The resource URI

mime_type: String

MIME type of the content

text: Option<String>

Text content (for text/html+mcp)

blob: Option<String>

Binary content as base64 (for future WASM support)

meta: Option<Map<String, Value>>

Optional metadata for resource content (e.g., widget description, CSP, domain)

Implementations

impl UIResourceContents

pub fn html(uri: impl Into<String>, html: impl Into<String>) -> Self

Create new HTML contents with the standard MCP Apps MIME type (text/html;profile=mcp-app).

This is the correct MIME type for widgets rendered by Claude Desktop, ChatGPT, and other MCP hosts that support the ext-apps protocol.

Trait Implementations

impl Clone for UIResourceContents

fn clone(&self) -> UIResourceContents

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UIResourceContents

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UIResourceContents

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for UIResourceContents

Available on crate feature schema-generation only.

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl Serialize for UIResourceContents

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.