Workflows

Build durable workflows & multi-step applications

Workflows is an execution engine built on Cloudflare Workers — to build applications that can automatically retry, persist state and run for minutes, hours, days, or weeks. No need to worry about scaling, managing infrastructure, or handling durability: Workflows takes care of it for you.

Step-based

Any logic wrapped in a step can be automatically retried and memoized for durability, without extra boilerplate or checkpoints.

State included

Every instance persists to its own local state: no need to set up or manage a database or control plane.

Human-in-the-loop

Wait on external events: webhooks, approvals, queue messages — and use them to determine the next steps in your Workflow.

How do Workflows work?

State included

Every Workflow instance has its own built-in local database. State is automatically persisted and replayed: no need to run (or scale) complex database infrastructure.

Pay only for actual compute time

You are only billed while code executes. Waiting for third-party APIs or approvals costs $0, so bills are dramatically lower than duration-based platforms or self-hosted alternatives.

Just write code

Write code, test it, and use your favorite packages and API libraries — no custom DSL needed.

Human-in-the-loop

Build Workflows that can wait for events — approvals from a human, webhooks from a payment processor, or messages from a queue — with just a single line of code.

Workflows

Ideal for resilient, multi-step systems

You can use Workflows to:

View docs

Building AI agents

Code review tasks, compact context, or processing data

Asynchronous tasks

Lifecycle emails, billing jobs, and critical data processing tasks

Post-processing user-generated content

Run inference, clean up or validate uploaded content

A durable execution engine to build multi-step applications

Workflows introduces a programming model that makes it easier to build reliable, long-running tasks, observe as they progress, and programmatically trigger instances based on events across your services. Workflows automatically retry, persist state, and run for minutes, hours, days, or weeks.

export class CheckoutWorkflow extends WorkflowEntrypoint {
  async run(event, step) {
    const processorResponse = await step.do('submit payment', async () => {
      let resp = await submitToPaymentProcessor(event.params.payment);
      return await resp.json<any>();
    });

    const textResponse = await step.do('send confirmation text', sendConfirmation);

    await step.sleep('wait for feedback', '2 days');

    await step.do('send feedback email', sendFeedbackEmail);

    await step.sleep('delay before marketing', '30 days');

    await step.do('send marketing follow up', sendFollowUp);
  }
}