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swift-cloud/Vercel 2.1.0
Swift runtime for Vercel Serverless Functions
⭐️ 86
🕓 7 weeks ago
iOS macOS watchOS tvOS
.package(url: "https://github.com/swift-cloud/Vercel.git", from: "2.1.0")


A Swift runtime and SDK for Vercel Serverless Functions.

Vercel Starter Kit

Getting Started

Check out the intoductory blog post and YouTube tutorial for getting started:

How does this work?

There's two important pieces to this package that make everything work:

  1. An SDK that wraps the AWSLambdaRuntime and provides access to Vercel specific API like EdgeConfig
  2. A Swift Package Plugin which builds your code and produces a directory structure compliant with Vercel's Build Output API


Request Handler

import Vercel

struct App: RequestHandler {

    func onRequest(_ req: Request) async throws -> Response {
        let greeting = EdgeConfig.default.get("greeting").string!
        return .status(.ok).send("Hello, \(greeting)")

Express Handler

import Vercel

struct App: ExpressHandler {

    static func configure(router: Router) async throws {
        router.get("/") { req, res in
            res.status(.ok).send("Hello, Swift")

Vapor Handler

import Vapor
import VercelVapor

struct App: VaporHandler {

    static func configure(app: Application) async throws {
        app.get { _ in
            "Hello, Vapor"

And make sure to update your Package.swift with the new package:

dependencies: [
  .product(name: "Vercel", package: "Vercel"),
  .product(name: "VercelVapor", package: "Vercel")

Data Fetching

You can use any popular library to fetch data such as Alamofire or async-http-client but we also provide a convenient fetch() method directly in this package:

let obj = try await fetch("https://httpbin.org/json").json()

Edge Config

This package provides full access to Vercel's Edge Config API. You can access the default edge config store or any additional store assigned to your project:

// Default edge config
let str = EdgeConfig.default.get("some-string-key").string

// Edge config assigned to an environment variable
let num = EdgeConfig("EDGE_CONFIG_2").get("some-int-key").int

Static Files

You can add a top level public folder that will be deployed statically to Vercel's CDN.

Cron Jobs

Cron jobs are fully supported by adding a vercel.json file to the root of your project and following the Vercel documentation here: https://vercel.com/docs/cron-jobs

Running Locally

Running server side locally has traditionally been a huge pain, but not anymore. This package makes it trivial to run code locally:

swift package --disable-sandbox vercel dev

This will build and run your Swift application and start a local server at http://localhost:7676



To deploy your project locally you need to install Docker and the Vercel CLI. Once installed you can you must link your Vercel project:

vercel link

After linking your project you can deploy it via Swift package manager:

swift package --disable-sandbox vercel deploy

Deploy Options

swift package --disable-sandbox vercel deploy
  • --prod - Triggers a production deploy to Vercel
  • --product <name> - The product you want to build. Default: first target in Package.swift with the Vercel dependency
  • --memory <number> - The amount of memory in megabytes to allocate to your function. Default 512mb
  • --duration <number> - The maximum duration in seconds that your function will run. Default: 10s
  • --regions <name> - Comma separated list of regions to deploy your function to. Default: iad1
  • --port <number> - Custom port to run the local dev server on. Default: 7676

GitHub Actions

Use the following GitHub actions workflow to continuiously deploy your project to Vercel:

name: Vercel

on: push

  VERCEL_ORG_ID: ${{ secrets.VERCEL_ORG_ID }}

    runs-on: ubuntu-latest
    container: swift:5.7-amazonlinux2

      - uses: actions/checkout@v3

      - uses: actions/cache@v3
          path: .build
          key: ${{ runner.os }}-spm-${{ hashFiles('Package.resolved') }}
          restore-keys: ${{ runner.os }}-spm-

      - uses: actions/setup-node@v3
          node-version: 16

      - name: Install
        run: npm install -g vercel@latest

      - name: Deploy
        run: swift package --disable-sandbox vercel deploy


Stars: 86
Last commit: 4 weeks ago
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Release Notes

7 weeks ago

Introduces a new server command to run the local proxy server without building and running the application. This allows for running the main application in Xcode with full debugging support.

To start just the local proxy server:

swift package --disable-sandbox vercel server

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