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Access 13 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";

const agent = new 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);
}
OpenAI Compatibility

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

Models​

ModelImageAudioVideoToolsStreamingContext Window
requesty/google/gemini-2.5-flash✓✓✓✓✗1,048,576
requesty/google/gemini-2.5-pro✓✓✓✓✗1,048,576
requesty/openai/gpt-4.1-mini✓✗✗✓✗1,047,576
requesty/openai/gpt-5-nano✗✗✗✓✗16,000
requesty/openai/gpt-4.1✓✗✗✓✗1,047,576
requesty/openai/o4-mini✓✗✗✓✗200,000
requesty/openai/gpt-5-mini✓✗✗✓✗128,000
requesty/openai/gpt-4o-mini✓✗✗✓✗128,000
requesty/openai/gpt-5✓✓✓✓✗400,000
requesty/anthropic/claude-opus-4✓✗✗✓✗200,000
requesty/anthropic/claude-3-7-sonnet✓✗✗✓✗200,000
requesty/anthropic/claude-4-sonnet-20250522✓✗✗✓✗200,000
requesty/anthropic/claude-opus-4-1-20250805✓✗✗✓✗200,000

Advanced Configuration​

Custom Headers​

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

Dynamic Model Selection​

const agent = new Agent({
  name: "dynamic-agent",
  model: ({ runtimeContext }) => {
    const useAdvanced = runtimeContext.task === "complex";
    return useAdvanced
      ? "requesty/openai/o4-mini"
      : "requesty/anthropic/claude-3-7-sonnet";
  },
});