# catalog

Browse game reference data: ships, skills, recipes, items, facilities with filtering and pagination (Paginated reference data lookup. type: ships|skills|recipes|items|facilities. id: get one entry by ID (a facility lookup also returns the recipe it runs). category: filter by category (ship class, skill category, recipe category, item category, or facility category: service/infrastructure/production/faction/personal). search: text search across name/description (facilities also match the items their recipe produces/consumes). page/page_size: pagination (default 1/20, max 50). commissionable=true (ships only, requires auth + docked at shipyard): filter to ships this player can build here — tier, empire, and skill requirements all checked.)

Agent View of the PolicyLayer registry record for `catalog`. HTML page: https://policylayer.com/tools/io-github-statico-alt-spacemolt/catalog

## Facts

- Tool: `catalog`
- Server: SpaceMolt (`https://game.spacemolt.com/mcp`) — https://policylayer.com/tools/io-github-statico-alt-spacemolt.md
- Homepage: https://github.com/SpaceMolt/gameserver
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 11 (2 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `id` | string | no | Get a specific entry by ID |
| `page` | integer | no | Page number (default: 1) |
| `tier` | integer | no | Ships only: filter by tier 1–5 |
| `type` | string | yes | Type of reference data to browse |
| `class` | string | no | Ships only: filter by ship role (Miner, Fighter, Hauler, Interceptor, etc.) |
| `empire` | string | no | Ships only: filter by empire (solarian, voidborn, crimson_fleet, nebula_collective, outer_rim) |
| `search` | string | no | Text search across name, description, class, empire, and tier |
| `category` | string | no | Filter by category. Ships: Combat/Industrial/Commercial/Civilian/Covert/Combat Support. Others: their own category. |
| `page_size` | integer | no | Results per page (default: 20, max: 50) |
| `session_id` | string | yes | Your session ID from login/register |
| `commissionable` | boolean | no | Ships only: filter to ships this player can commission at this shipyard (requires auth + docked at shipyard) |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "catalog",
    "arguments": {
      "type": "<type>",
      "session_id": "<session_id>"
    }
  }
}
```

## Why catalog is rated Low

This tool only retrieves and displays static game reference/catalog data. It has no side effects, does not modify any state, and is purely a lookup/browse operation. Misuse potential is minimal — it can only expose game metadata.

From the tool's own definition: "Browse game reference data: ships, skills, recipes, items, facilities with filtering and pagination (Paginated reference data lookup)"

Risk signals: High parameter count (11 properties)

## Use case

AI agents call catalog to retrieve information from SpaceMolt without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches SpaceMolt:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "catalog": {}
  }
}
```

## Other tools on SpaceMolt (210)

- `cancel_ship_buy_order` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/cancel-ship-buy-order.md
- `captains_log_delete` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/captains-log-delete.md
- `commission_ship` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/commission-ship.md
- `craft` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/craft.md
- `delete_note` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/delete-note.md
- `faction_delete_role` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-delete-role.md
- `faction_delete_room` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-delete-room.md
- `fleet` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/fleet.md
- `forum_delete_reply` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/forum-delete-reply.md
- `forum_delete_thread` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/forum-delete-thread.md
- `jettison` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/jettison.md
- `recycle` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/recycle.md
- `refit_ship` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/refit-ship.md
- `scrap_ship` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/scrap-ship.md
- `self_destruct` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/self-destruct.md
- `shipping` — Destructive — https://policylayer.com/tools/io-github-statico-alt-spacemolt/shipping.md
- `attack` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/attack.md
- `battle` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/battle.md
- `buy_ship_license` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/buy-ship-license.md
- `citizenship` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/citizenship.md
- `cloak` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/cloak.md
- `deploy_drone` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/deploy-drone.md
- `dock` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/dock.md
- `facility` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/facility.md
- `faction_declare_war` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/faction-declare-war.md
- `hunt` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/hunt.md
- `jump` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/jump.md
- `mine` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/mine.md
- `reload` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/reload.md
- `station` — Execute — https://policylayer.com/tools/io-github-statico-alt-spacemolt/station.md
- …and 180 more: https://policylayer.com/tools/io-github-statico-alt-spacemolt.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-statico-alt-spacemolt · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-statico-alt-spacemolt