Kiro

Access 12 Kiro models through Mastra's model router. Authentication is handled automatically using the KIRO_API_KEY environment variable.

Learn more in the Kiro documentation.

.env

KIRO_API_KEY=your-api-key

src/mastra/agents/my-agent.ts

import { Agent } from "@mastra/core/agent";

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "kiro/auto"
});

// Generate a response
const response = await agent.generate("Hello!");

// Stream a response
const stream = await agent.stream("Tell me a story");
for await (const chunk of stream) {
  console.log(chunk);
}

info

Mastra uses the OpenAI-compatible /chat/completions endpoint. Some provider-specific features may not be available. Check the Kiro documentation for details.

Models

12 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
kiro/auto	1.0M						—	—
kiro/claude-haiku-4.5	200K						—	—
kiro/claude-opus-4.5	200K						—	—
kiro/claude-opus-4.6	1.0M						—	—
kiro/claude-opus-4.7	1.0M						—	—
kiro/claude-sonnet-4	200K						—	—
kiro/claude-sonnet-4.5	200K						—	—
kiro/claude-sonnet-4.6	1.0M						—	—
kiro/deepseek-3.2	164K						—	—
kiro/minimax-m2.1	196K						—	—
kiro/minimax-m2.5	196K						—	—
kiro/qwen3-coder-next	256K						—	—

Advanced configuration

Custom headers

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://q.us-east-1.amazonaws.com",
    id: "kiro/auto",
    apiKey: process.env.KIRO_API_KEY,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic model selection

src/mastra/agents/my-agent.ts

const agent = new Agent({
  id: "dynamic-agent",
  name: "Dynamic Agent",
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === "complex";
    return useAdvanced
      ? "kiro/qwen3-coder-next"
      : "kiro/auto";
  }
});

Direct provider installation

This provider can also be installed directly as a standalone package, which can be used instead of the Mastra model router string. View the package documentation for more details.

npm

npm install kiro-acp-ai-provider

pnpm

pnpm add kiro-acp-ai-provider

Yarn

yarn add kiro-acp-ai-provider

Bun

bun add kiro-acp-ai-provider