mcp-app-harness
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| MCP_HOST | No | HTTP transport bind host | 0.0.0.0 |
| MCP_PORT | No | HTTP transport bind port | 9000 |
| APP_DB_PATH | No | SQLite path for the app (`/data/...` to persist on a volume) | :memory: |
| APP_BASE_URL | No | Where the harness reaches the app | http://localhost:8080 |
| MCP_TRANSPORT | No | `stdio` (embedded) or `http` (sandboxed port) | stdio |
| HARNESS_FIXTURE | No | Baseline for `populate()` | fixtures/seed_baseline.json |
| APP_HTTP_TIMEOUT | No | Client timeout (short, so a wedged app fails fast) | 10 |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
| logging | {} |
| prompts | {
"listChanged": false
} |
| resources | {
"subscribe": false,
"listChanged": false
} |
| extensions | {
"io.modelcontextprotocol/ui": {}
} |
| experimental | {} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| create_ticketB | Open a new support ticket. priority ∈ low|normal|high|urgent. |
| list_ticketsA | List tickets, optionally filtered by status (open|in_progress|closed). |
| get_ticketB | Fetch a single ticket by id. |
| assign_ticketC | Assign a ticket to someone; moves it to in_progress. |
| close_ticketD | Close a ticket. |
| populateC | Reset the app and load the deterministic baseline fixture. |
| snapshotB | Capture the full application state as a JSON document. |
| restoreC | Overwrite application state with a previously captured snapshot. |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
| all_tickets | Live view of every ticket — handy as read-only context for an agent. |
| app_health | Liveness of the application under test. |
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