NestJS Adapter

The @mastra/nestjs package provides a NestJS module for running Mastra with the Express-based NestJS platform.

It's intentionally Express-only for v1. If Nest is bootstrapped with a different HTTP adapter, MastraModule throws during startup instead of attempting a partial integration. For general adapter concepts, see Server Adapters.

Installation

Install the NestJS adapter and ensure your app uses the Express platform:

npm

npm install @mastra/nestjs@latest

pnpm

pnpm add @mastra/nestjs@latest

Yarn

yarn add @mastra/nestjs@latest

Bun

bun add @mastra/nestjs@latest

Usage example

src/app.module.ts

import { Module } from '@nestjs/common'
import { MastraModule } from '@mastra/nestjs'
import { mastra } from './mastra'

@Module({
  imports: [
    MastraModule.register({
      mastra,
    }),
  ],
})
export class AppModule {}

note

MastraModule registers a catch-all controller (@All('*')). If it's imported before your app modules, it can intercept unrelated routes and return 404s. To avoid conflicts, import MastraModule last or mount it under a dedicated prefix (e.g., /api/v1/mastra).

src/main.ts

import { NestFactory } from '@nestjs/core'
import { AppModule } from './app.module'

async function bootstrap() {
  const app = await NestFactory.create(AppModule)
  await app.listen(3000)
}

bootstrap()

By default, Mastra routes mount under /api. Use prefix to change it.

Module options

mastra:

Mastra

Mastra instance

prefix?:

string

= `/api`

Route path prefix (e.g., /api/v2)

rateLimitOptions?:

{ enabled?: boolean; defaultLimit?: number; windowMs?: number; generateLimit?: number }

Rate limiting config (enabled by default)

shutdownOptions?:

{ timeoutMs?: number; notifyClients?: boolean }

Graceful shutdown configuration

bodyLimitOptions?:

{ maxSize?: number; maxFileSize?: number; tempDir?: string; allowedMimeTypes?: string[] }

Request body size limits

streamOptions?:

{ redact?: boolean; heartbeatMs?: number }

Streaming configuration

tracingOptions?:

{ enabled?: boolean; serviceName?: string }

OpenTelemetry tracing configuration

contextOptions?:

{ strict?: boolean; logWarnings?: boolean }

Request context parsing config

customRouteAuthConfig?:

Map<string, boolean>

Per-route auth overrides. Keys are METHOD:PATH. Custom routes from server.apiRoutes (registerApiRoute()) are added automatically based on their requiresAuth setting.

tools?:

Record<string, Tool>

Registered tools for the server

taskStore?:

InMemoryTaskStore

Task store for A2A (Agent-to-Agent) operations

mcpOptions?:

{ serverless?: boolean; sessionIdGenerator?: () => string }

MCP transport options

auth?:

{ enabled?: boolean; allowQueryApiKey?: boolean }

Controls Mastra auth for Mastra routes. When server.auth is configured on your Mastra instance, it runs automatically (the same pipeline as other adapters: bearer tokens, cookie sessions, session refresh, and mapUserToResourceId). Set enabled: false to rely only on your own NestJS guards. Query-string apiKey auth is opt-in for backward compatibility.

Async registration

src/app.module.ts

import { Module } from '@nestjs/common'
import { ConfigModule, ConfigService } from '@nestjs/config'
import { MastraModule } from '@mastra/nestjs'
import { Mastra } from '@mastra/core/mastra'

@Module({
  imports: [
    ConfigModule.forRoot(),
    MastraModule.registerAsync({
      imports: [ConfigModule],
      useFactory: (config: ConfigService) => ({
        mastra: new Mastra({
          agents: {
            greeter: {
              name: 'greeter',
              description: 'Greets the user',
              model: config.get('MASTRA_MODEL', 'openai/gpt-5-mini'),
            },
          },
        }),
        prefix: config.get('MASTRA_PREFIX', '/api'),
      }),
      inject: [ConfigService],
    }),
  ],
})
export class AppModule {}

Accessing Mastra

Use the MASTRA token or MastraService in your services:

import { Injectable, Inject } from '@nestjs/common'
import { MASTRA, MastraService } from '@mastra/nestjs'
import type { Mastra } from '@mastra/core/mastra'

@Injectable()
export class AgentService {
  constructor(@Inject(MASTRA) private readonly mastra: Mastra) {}
}

@Injectable()
export class WorkflowService {
  constructor(private readonly mastraService: MastraService) {}
}

Start background workers

MastraModule doesn't start Mastra's background workers. Without them, scheduled workflows, agent schedules, and event listeners never run. Call mastra.startWorkers() after the app starts listening:

src/main.ts

import { NestFactory } from '@nestjs/core'
import { MASTRA } from '@mastra/nestjs'
import type { Mastra } from '@mastra/core/mastra'
import { AppModule } from './app.module'

async function bootstrap() {
  const app = await NestFactory.create(AppModule)
  app.enableShutdownHooks()
  await app.listen(3000)

  try {
    await app.get<Mastra>(MASTRA).startWorkers()
  } catch (error) {
    console.error('Failed to start background workers', error)
    await app.close()
    process.exit(1)
  }
}

bootstrap()

The module's shutdown handling drains in-flight requests but doesn't stop Mastra. To stop workers and drain in-flight workflow runs, call mastra.shutdown() from a shutdown hook. The drain is bounded by drainTimeout (default 5 seconds), and runs that don't settle within it are abandoned with a warning:

src/mastra-lifecycle.service.ts

import { Inject, Injectable, type OnApplicationShutdown } from '@nestjs/common'
import { MASTRA } from '@mastra/nestjs'
import type { Mastra } from '@mastra/core/mastra'

@Injectable()
export class MastraLifecycleService implements OnApplicationShutdown {
  constructor(@Inject(MASTRA) private readonly mastra: Mastra) {}

  async onApplicationShutdown() {
    await this.mastra.shutdown()
  }
}

Add MastraLifecycleService to the providers of a module that imports MastraModule. Shutdown hooks only run when app.enableShutdownHooks() is called.

See Start background workers for more details.

MCP routes

MCP endpoints are exposed under the API prefix:

• POST /api/mcp/:serverId/mcp

Health routes

Operational endpoints stay unprefixed on purpose for infrastructure compatibility:

• GET /health
• GET /ready
• GET /info

Related

• Server Adapters
• MastraServer Reference