# Host mcp server with ASP.NET Core: stored input and output artifacts

Deploy a mcp server built with ASP.NET Core 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 ASP.NET Core: 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 mcp server-specific behavior as your application code.

## Representative Queries
- Host mcp server with ASP.NET Core: stored input and output artifacts
- Where can I host MCP server built with ASP.NET Core?
- 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
### Compute
- **Status:** verified  
- **Summary:** Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.

### Postgres
- **Status:** verified  
- **Summary:** Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.

### S3-compatible object storage
- **Status:** verified  
- **Summary:** Buckets are S3-compatible with issued credentials; PutObject and GetObject are verified by canary. Other S3 operations are not verified.

## Prerequisites
- A ASP.NET Core project that builds and starts with the documented commands (dotnet publish -c Release -o out in the builder, then dotnet .dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT)
- 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

## Workflow Steps
### Build and Start
- **Command:** dotnet publish -c Release -o out in the builder, then dotnet .dll on the dotnet-10 template with ASPNETCORE_URLS bound to PORT. The server must bind 0.0.0.0 on PORT.

### Implement the Pattern on PostgreSQL
- Copy the approach into your schema; keep migrations idempotent and run them with --release-command.

### Wire Object Storage
- Create the bucket(s), then pass endpoint, region, bucket and keys as --env values. Use path-style addressing. Keep private data in an unpublished bucket.

### Deploy
- **Command:** ample deploy . --name  --public --env S3_ENDPOINT=... --env S3_REGION=... --env S3_BUCKET=... --env S3_ACCESS_KEY_ID=... --env S3_SECRET_ACCESS_KEY=...

### Verify
- **Command:** ample logs  --kind build

## Examples
### ASP.NET Core Pattern Fixture
- **Description:** Multi-pattern ASP.NET Core app whose generated downloads module was checked live; the module is under tests/deploy-canaries/_pattern-modules.
- **Source Reference:** tests/deploy-canaries/asp-net-core-patterns

## Success Checks
### App Responds on Its Public URL
- **Kind:** http_get  
- **Path:** /  
- **Expect:** ample canary asp net core patterns

### Generated-downloads Self-test
- **Kind:** http_get  
- **Path:** /p/generated-downloads  
- **Expect:** export=ok rows=3 (with ?token=...; 401 without)

## Limitations
- Verified on the dotnet-10 template at s-1vcpu-1gb with the example fixture; other sizes, templates and ASP.NET Core major versions are not verified.
- The mcp server itself (your export formats, retention policy and entitlement model) is application code and was not separately tested; the pattern checks are what was verified.

## Cost Estimate
- **Currency:** USD
- **Monthly Amount:** 10.0
- **Basis:** size prices from pricing.toml (loaded by the API) at build revision 1ac5595375130d45290090e82ed0f554ccd45405-dirty.
### Components
- **App Server**:
  - **Size:** s-1vcpu-1gb
  - **Quantity:** 1.0
  - **Monthly Amount:** 5.0

- **Managed PostgreSQL Database**:
  - **Size:** s-1vcpu-1gb
  - **Quantity:** 1.0
  - **Monthly Amount:** 5.0

- **Note:** Always-on monthly price of the tested sizes; apps and databases auto-pause when idle.