GeminiProvider class

Streams generateContent responses from Google's Gemini API.

Gemini's wire format genuinely differs from OpenAI-compatible APIs (see OpenRouterProvider): the API key is a query parameter rather than an Authorization header, roles are user/model rather than user/assistant, and system instructions are a separate top-level field rather than a message with role system.

Inheritance

• Object
• AgentProvider
• GeminiProvider

Constructors

GeminiProvider({required String apiKey, required String model, Client? httpClient, Uri? endpoint, List<Map<String, Object?>>? functionDeclarations, Map<String, Object?>? extraParams})

Creates a Gemini provider.

Properties

apiKey → String

Your Gemini API key.

final

extraParams → Map<String, Object?>?

Extra body fields merged in, e.g. {'generationConfig': {...}}.

final

functionDeclarations → List<Map<String, Object?>>?

Raw Gemini-shaped function-declaration schemas, passed through as tools: [{functionDeclarations: ...}]. null omits the field.

final

hashCode → int

The hash code for this object.

no setter, inherited

model → String

Model id, e.g. gemini-1.5-pro or gemini-2.0-flash.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

asResponder({List<ChatMessage> history()?}) → AgentResponder

Adapts this provider to AgentResponder, for ChatController's managed send().

inherited

dispose() → void

Releases resources held by this provider.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

sendMessage(ChatController controller, String text, {List<Attachment>? attachments}) → Future<void>

Drives controller's manual streaming API directly, so tool calls surface as ToolCalls instead of being dropped.

inherited

streamEvents(List<ChatMessage> conversation) → Stream<ProviderEvent>

Streams structured events for conversation's next assistant turn.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited