Mastra | Doubleword Inference API

Mastra uses the Vercel AI SDK under the hood. Use the @doubleword/vercel-ai provider package to point it at the Doubleword API.

Install

npm install mastra @mastra/core @doubleword/vercel-ai

Configure

import { Agent } from "@mastra/core/agent";
import { createDoubleword } from "@doubleword/vercel-ai";

const doubleword = createDoubleword({
  apiKey: "{{apiKey}}",
});

const agent = new Agent({
  name: "my-agent",
  instructions: "You are a helpful assistant.",
  model: doubleword("{{selectedModel.id}}"),
});

const result = await agent.generate("Say hello.");
console.log(result.text);

The @doubleword/vercel-ai package automatically configures the base URL and supports credential resolution from the DOUBLEWORD_API_KEY environment variable.

Batch pricing

For background workloads where latency is not critical, use createDoublewordBatch to transparently route requests through Doubleword's Batch API at reduced cost:

npm install mastra @mastra/core @doubleword/vercel-ai autobatcher

import { Agent } from "@mastra/core/agent";
import { createDoublewordBatch } from "@doubleword/vercel-ai";

const doubleword = createDoublewordBatch({
  apiKey: "{{apiKey}}",
});

const agent = new Agent({
  name: "my-agent",
  instructions: "You are a helpful assistant.",
  model: doubleword("{{selectedModel.id}}"),
});

const result = await agent.generate("Summarize this document.");
console.log(result.text);
await doubleword.close();

Concurrent calls are automatically collected into batch submissions, cutting inference costs by up to 90%. The interface is identical to the real-time provider — only streaming is not supported.