Mastra•3w ago

How to set runtimeContext with chatRoutes

In my current setup, i add some runtime context in the api/route.ts which is then passed to the agent.stream options. How do I implement the same when using chatRoute?

4 Replies

Mastra Triager•3w ago

📝 Created GitHub issue: https://github.com/mastra-ai/mastra/issues/10385 🔍 If you're experiencing an error, please provide a minimal reproducible example whenever possible to help us resolve it quickly. 🙏 Thank you for helping us improve Mastra!

Grayson•3w ago

Option 1: Middleware

export const mastra = new Mastra({
  server: {
    middleware: [
      async (c, next) => {
        const requestContext = c.get("requestContext");
        requestContext.set("userId", c.req.header("x-user-id"));
        await next();
      },
    ],
  },
});

chatRoute({ path: '/chat/:agentId' });

export const mastra = new Mastra({
  server: {
    middleware: [
      async (c, next) => {
        const requestContext = c.get("requestContext");
        requestContext.set("userId", c.req.header("x-user-id"));
        await next();
      },
    ],
  },
});

chatRoute({ path: '/chat/:agentId' });

Option 2: Send in Request Body

fetch('/api/chat/myAgent', {
  method: 'POST',
  body: JSON.stringify({
    messages: [...],
    requestContext: { userId: '123', tier: 'pro' }
  })
});

fetch('/api/chat/myAgent', {
  method: 'POST',
  body: JSON.stringify({
    messages: [...],
    requestContext: { userId: '123', tier: 'pro' }
  })
});

chatRoute automatically picks up requestContext from either source and passes it to agent.stream().

YashOP•7d ago

Hey! @Grayson Thanks for replying. can you point me to some documentation for the second option ? hey @Grayson ! can you help me in figuring out how to use the second option you suggested ? I have a bunch of api routes which stream different agents. I add runtime context at the Next.js api route level. This context comes from the frontend client as request body.

Grayson•7d ago

Hey sorry, was out of office. Can you post a minimal repro of what you are trying to do? (I think I may have mixed up requestContext and runtimeContext in your question)

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How to set runtimeContext with chatRoutes

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