# Host graphql api with Fastify: stored input and output artifacts

Deploy a graphql api built with Fastify on Ample using the generated downloads pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL, a private S3-compatible bucket holds objects with credentials delivered as encrypted environment variables. Verified on Fastify: an export query rendered to a CSV artifact stored with metadata in a private bucket and returned only to an authorized caller (401 without token, export=ok rows=3). Not separately tested: your export formats, retention policy and entitlement model; treat the graphql api-specific behavior as your application code.

## Representative Queries
- Host graphql api with Fastify: stored input and output artifacts
- Where can I host GraphQL API built with Fastify?
- I need an input/output artifact contract, object metadata and access boundaries.

## Resource Requirements
- primitive:compute
- primitive:postgres
- primitive:s3-compatible-object-storage

## Infrastructure Requirements
1. **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
2. **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.
3. **S3-compatible object storage**: Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

## Framework
Fastify  
## Workload
GraphQL API  
## Release Status
Published  
## Support Status
Verified  
## Execution Status
Ready

## Prerequisites
- A Fastify project that builds and starts with the documented commands (npm install, npm run build --if-present, npm run start on the node-22 template)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- A bucket from `ample bucket create` with its credentials passed as encrypted S3_* environment variables
- An Ample account token with servers:write, databases:read, buckets:read

## Input Schema
```json
{
  "additionalProperties": false,
  "properties": {
    "env": {
      "description": "Encrypted environment variables (bucket credentials, secrets)",
      "items": {"pattern":"^[A-Z][A-Z0-9_]*=.*$","type":"string"},
      "maxItems": 50,
      "type": "array"
    },
    "name": {
      "description": "App name",
      "maxLength": 63,
      "minLength": 1,
      "pattern": "^[a-z0-9-]+$",
      "type": "string"
    },
    "path": {
      "description": "Project directory or ample.toml service",
      "maxLength": 512,
      "minLength": 1,
      "type": "string"
    },
    "release_command": {
      "description": "Migration command run before activation",
      "maxLength": 512,
      "type": "string"
    }
  },
  "required": ["env", "name", "path"],
  "type": "object"
}
```

## Workflow Steps
1. **Build and start**: npm install, npm run build --if-present, npm run start on the node-22 template. The server must bind 0.0.0.0 on PORT.
2. **Implement the pattern on PostgreSQL**: Copy the approach into your schema; keep migrations idempotent and run them with --release-command.
3. **Wire object storage**: Create the bucket(s), then pass endpoint, region, bucket and keys as --env values.
4. **Deploy**: Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked).
5. **Verify**: Fetch the live URL and the pattern self-test route(s) and then run your own checks.

## Examples
- **Fastify pattern fixture**: Multi-pattern Fastify app whose generated downloads module was checked live; the module is under tests/deploy-canaries/_pattern-modules.

## Success Checks
1. **App responds on its public URL**: `ample canary fastify patterns`
2. **Generated-downloads self-test**: `export=ok rows=3 (with ?token=...; 401 without)`

## Limitations
- Verified on the node-22 template at s-1vcpu-1gb with the example fixture; other sizes, templates and Fastify major versions are not verified.
- The graphql api itself is application code and was not separately tested.
- Region, compliance attestations and request-duration limits are unknown and not claimed.

## Cost Estimate
- **Currency**: USD
- **Monthly Amount**: $10.00
- **Basis**: size prices from pricing.toml at build revision
- **Components**:
  - **App server**: size s-1vcpu-1gb, quantity 1.0, monthly amount $5.00
  - **Managed PostgreSQL database**: size s-1vcpu-1gb, quantity 1.0, monthly amount $5.00

## Evidence Summary
- **Canary Run**: Fastify pattern fixture deployed on Ample; checks passed for generated-downloads and configuration-secrets.

## Next Actions
- Browse the catalog index
- Search published recipes by intent, stack, and constraints
- Prepare a side-effect-free deployment plan for an authorized project
- Read the existing agent authentication setup
- Browse GraphQL API