serverless/docs/providers/cloudflare/guide/functions.md

Read this on the main serverless docs site

Cloudflare Workers - Functions

If you are using Cloudflare as a provider, all functions inside the service are Cloudflare Workers.

Configuration

All of the Cloudflare Workers in your serverless service can be found in serverless.yml under the functions property.

# serverless.yml
 
service:
    name: hello-world
    config:
      accountId: CLOUDFLARE_ACCOUNT_ID 
      zoneId: CLOUDFLARE_ZONE_ID 

provider:
  name: cloudflare

plugins:
  - serverless-cloudflare-workers

functions:
  helloWorld:
    # What the script will be called on Cloudflare (this property value must match the function name one line above)
    name: helloWorld
    # The name of the script on your machine, omitting the .js file extension
    script: helloWorld
    # Events are only relevant to the `serverless invoke` command and don’t affect deployment in any way
    events:
      - http:
          url: example.com/hello/*
          method: GET
          headers:
            someKey: someValue

The script property points to the file containing your Cloudflare Worker.

// helloWorld.js
 
addEventListener('fetch', event => {
    event.respondWith(handleRequest(event.request))
  })
 
  async function handleRequest(request) {
    return new Response("Hello world")
  }

If you have an Enterprise Cloudflare account, you can add multiple Cloudflare Workers to your project.

# serverless.yml
 
service:
    name: hello-world
    config:
      accountId: CLOUDFLARE_ACCOUNT_ID 
      zoneId: CLOUDFLARE_ZONE_ID 

provider:
  name: cloudflare

plugins:
  - serverless-cloudflare-workers

functions:
  helloWorld:
    # What the script will be called on Cloudflare (this property value must match the function name one line above)
    name: helloWorld
    # The name of the script on your machine, omitting the .js file extension
    script: helloWorld
    # Events are only relevant to the `serverless invoke` command and don’t affect deployment in any way
    events:
      - http:
          url: example.com/hello/*
          method: GET
          headers:
            someKey: someValue


  # Only Enterprise accounts would be allowed to add this second function and its corresponding route above
  foo:
    name: foo
    script: bar
    events:
      - http:
          url: example.com/foo/*
          method: GET

The script property is what the Cloudflare Worker will be called on Cloudflare’s data centers.