## The short version

To deploy a Fastify app on Ample, run `ample deploy . --name <app-name> --public` in the project directory, or ask your coding agent to deploy it to Ample. Ample builds it on the `node-22` template, starts it with `npm run start` and returns a public HTTPS URL.

## Deploy Fastify

1. 1

### Ask your coding agent

Install the Ample CLI and create an account (no browser or card needed), then ask Claude Code, Codex, Cursor or any agent with a shell to deploy the project. See [Ample for coding agents](/content/agents/index.html).

```bash
   curl -fsSL https://get.ample.computer/install.sh | sh
   ample auth signup
   # then, in your agent:
   # "Deploy this Fastify app to Ample"
   ```

2. 2

### Or deploy from the CLI

Run the deploy once from the project directory. It waits until the app is live or failed and prints the URL; exit 0 is live, 1 failed, 2 needs input.

```bash
   ample deploy . --name <app-name> --public
   ```

3. 3

### Or use MCP

Agents connected to the Ample MCP server (`https://api.ample.computer/mcp`, or `ample mcp` over stdio) call `ample_deploy` with the same arguments.

4. 4

### Verify

Open the URL. If the deploy failed, read the build log, then the runtime log, fix the cause and deploy again.

```bash
   ample logs <deployment_id> --kind build
   ```

## What Ample runs

| Template | `node-22` |
| Install  | `npm install` |
| Build    | `npm run build --if-present` |
| Start    | `npm run start` |
| Tested size | `s-1vcpu-1gb` |

Fastify must listen with host 0.0.0.0 on process.env.PORT. Ample detects the runtime, installs dependencies, runs the build when present and starts the app on the node-22 template behind a public HTTPS URL.

Last verification (September 19, 2026): Fastify app deployed on node-22 and served the expected response.

## Before you deploy

### You need

- A package.json with build and start scripts
- A server that listens on process.env.PORT and 0.0.0.0
- An Ample account token with servers:write

### Know the limits

- Verified on the node-22 template at s-1vcpu-1gb; other templates and sizes are not verified by this recipe.

## Frequently asked questions

### Do I need a Dockerfile to deploy Fastify?

No. Ample detects Fastify from the repository and builds it from source on the `node-22` template. Dockerfile build steps are not run.

### How do I add a database to a Fastify app?

Leave DATABASE_URL unset and deploy: when the code needs Postgres, MySQL, Redis or MongoDB, Ample creates a managed database and passes its connection string to the app. See [Connect Postgres for Fastify](/content/guides/fastify/database-connection/index.html).

### What does it cost to host a Fastify app on Ample?

The Free plan runs 2 apps at once with no card and a hard monthly budget, so it never bills you. Larger needs are priced on volume; see [pricing](/content/pricing/index.html).

### What if the deploy fails?

`ample deploy` waits until the app is live or failed. A failure returns who must act, a diagnosis and a suggested fix; read the logs with `ample logs <deployment_id> --kind build`. See [Diagnose deployment failures for Fastify](/content/guides/fastify/deployment-diagnostics/index.html).

## More for Fastify

[Fastify **How to serve Fastify public assets through a CDN on Ample**](/content/guides/fastify/cdn-assets/index.html) [Fastify **How to set environment variables and secrets for a Fastify app on Ample**](/content/guides/fastify/configuration-secrets/index.html) [Fastify **How to connect a Fastify app to Postgres on Ample**](/content/guides/fastify/database-connection/index.html) [Fastify **How to fix a failed Fastify deploy on Ample**](/content/guides/fastify/deployment-diagnostics/index.html) [Fastify **How to use S3-compatible storage from a Fastify app on Ample**](/content/guides/fastify/object-client/index.html) [Fastify **How to serve private files from a Fastify app on Ample**](/content/guides/fastify/private-file-access/index.html) [Fastify **How to run database migrations for a Fastify app on Ample**](/content/guides/fastify/schema-changes/index.html)