# Host GraphQL API with Gin: Streamed Responses

## Summary
Deploy a GraphQL API built with Gin on Ample using the streaming response service 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. Verified on Gin: a Server-Sent Events endpoint read incrementally through the public HTTPS gateway: five one-second chunks arrived spread over time with the first within seconds (not buffered), a 70-second stream of 36 chunks completed past common 60-second idle timeouts, and a client that disconnected after two chunks was observed and recorded by the server (disconnected=true). Not separately tested: your event schema, reconnection strategy and any per-request duration ceiling beyond the 70 seconds measured.

## Representative Queries
- Host graphql api with Gin: streamed responses
- Where can I host GraphQL API built with Gin?
- I need a tested end-to-end streaming transport, timeout behavior and client disconnect handling.

## Infrastructure Requirements
- **Compute:** Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sized as the priced VM sizes.
- **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.

## Prerequisites
- A Gin project that builds and starts with the documented commands (`CGO_ENABLED=0 go build -o app ./...` then `./app` on the ubuntu-24.04 template).
- A PostgreSQL driver reading DATABASE_URL at runtime.
- An Ample account token with `servers:write`, `databases:read`.

## Workflow Steps
1. **Build and start**: `CGO_ENABLED=0 go build -o app ./...` then `./app` on the ubuntu-24.04 template. The server must bind `0.0.0.0` on `PORT`.
2. **Implement the pattern on PostgreSQL**: The fixture's module implements streaming response service. Copy the approach into your schema.
3. **Deploy**: Run the synchronous deploy once and read the result.
4. **Verify**: Fetch the live URL and the pattern self-test route(s) from the example; then run your own checks.

## Examples
- **Gin Pattern Fixture**: Multi-pattern Gin app whose streaming response service module was checked live.

## Success Checks
- App responds on its public URL.
- Streaming response service self-test returns expected results.

## Limitations
- Verified on the ubuntu-24.04 template at s-1vcpu-1gb. Other sizes, templates, and Gin major versions are not verified.
- The graphql api-specific behavior is your application code and was not specifically tested.

## Cost Estimate
- **Monthly Amount**: $10.00
  - App server: $5.00
  - Managed PostgreSQL database: $5.00

## Next Actions
- [Browse the catalog index](https://api.ample.computer/v1/catalog)
- [Search published recipes](https://api.ample.computer/v1/catalog/search)
- [Prepare a deployment plan](https://api.ample.computer/v1/catalog/plan) for an authorized project.
- [Read existing authentication setup](https://api.ample.computer/mcp/setup) for more assistance.