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VercelDeployer

The VercelDeployer class handles deployment of standalone Mastra applications to Vercel. It manages configuration, deployment, and extends the base Deployer class with Vercel specific functionality.

Usage example​

import { Mastra } from "@mastra/core/mastra";
import { VercelDeployer } from "@mastra/deployer-vercel";

export const mastra = new Mastra({
  // ...
  deployer: new VercelDeployer(),
});

Constructor options​

The deployer supports a small set of high‑value overrides that are written to the Vercel Output API function config (.vc-config.json):

  • maxDuration?: number — Function execution timeout (in seconds)
  • memory?: number — Function memory (in MB)
  • regions?: string[] — Regions to deploy the function (e.g. ['sfo1','iad1'])

These options are merged into .vercel/output/functions/index.func/.vc-config.json while preserving default fields (handler, launcherType, runtime, shouldAddHelpers).

Example with overrides​

import { Mastra } from "@mastra/core/mastra";
import { VercelDeployer } from "@mastra/deployer-vercel";

export const mastra = new Mastra({
  // ...
  deployer: new VercelDeployer({
    maxDuration: 600,
    memory: 1536,
    regions: ["sfo1", "iad1"],
  }),
});