Requesty

Access 17 Requesty models through Mastra's model router. Authentication is handled automatically using the REQUESTY_API_KEY environment variable.

Learn more in the Requesty documentation.

REQUESTY_API_KEY=your-api-key

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

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "requesty/anthropic/claude-3-7-sonnet"
});

// 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 Requesty documentation for details.

Models

17 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
requesty/anthropic/claude-3-7-sonnet	200K						$3	$15
requesty/anthropic/claude-haiku-4-5	200K						$1	$5
requesty/anthropic/claude-opus-4	200K						$15	$75
requesty/anthropic/claude-opus-4-1	200K						$15	$75
requesty/anthropic/claude-sonnet-4	200K						$3	$15
requesty/anthropic/claude-sonnet-4-5	1.0M						$3	$15
requesty/google/gemini-2.5-flash	1.0M						$0.30	$3
requesty/google/gemini-2.5-pro	1.0M						$1	$10
requesty/openai/gpt-4.1	1.0M						$2	$8
requesty/openai/gpt-4.1-mini	1.0M						$0.40	$2
requesty/openai/gpt-4o-mini	128K						$0.15	$0.60
requesty/openai/gpt-5	400K						$1	$10
requesty/openai/gpt-5-mini	128K						$0.25	$2
requesty/openai/gpt-5-nano	16K						$0.05	$0.40
requesty/openai/o4-mini	200K						$1	$4
requesty/xai/grok-4	256K						$3	$15
requesty/xai/grok-4-fast	2.0M						$0.20	$0.50

Advanced Configuration

Custom Headers

const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://router.requesty.ai/v1",
    id: "requesty/anthropic/claude-3-7-sonnet",
    apiKey: process.env.REQUESTY_API_KEY,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic Model Selection

const agent = new Agent({
  id: "dynamic-agent",
  name: "Dynamic Agent",
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === "complex";
    return useAdvanced
      ? "requesty/xai/grok-4-fast"
      : "requesty/anthropic/claude-3-7-sonnet";
  }
});