> ## Documentation Index > Fetch the complete documentation index at: https://mcpjam-mintlify-docs-update-pr-3829-1786337254828.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Get the host-compat catalog > The versioned host-compatibility catalog backing `mcpjam compat` verdicts. Public and unauthenticated: static host facts and creation config with no project or user scope. Always returns a catalog — `source` is `live` when the backend publish was reachable and `bundled` when serving the SDK's built-in fallback. ## OpenAPI ````yaml /reference/openapi.json get /host-catalog openapi: 3.1.0 info: title: MCPJam API version: 1.0.0-preview description: >- Programmatic access to MCP servers saved in your MCPJam projects — live diagnostics (validate, inspect, export) and operations: call tools, render prompts, run eval suites asynchronously and poll their results, and import OAuth tokens. **The API is in preview**: the surface may change while we finish the design. Error `code` values are stable; error `message` strings are not. Write clients that ignore unknown response fields. contact: name: MCPJam url: https://github.com/MCPJam/inspector/issues servers: - url: https://app.mcpjam.com/api/v1 description: Hosted MCPJam security: - bearerAuth: [] tags: - name: Hosts description: >- Project hosts: named model + capability profiles you run chats and eval suites against. - name: Environments description: >- Project environments: named, live-editable execution bundles (one host, an optional standalone server group, optionally pinned skills and plugin versions) that eval suites and journeys run against. Distinct from Sandbox images, which are Computer base images. Reads require project membership; every write requires project admin. - name: Sandbox images description: >- Custom Computer images: a digest-pinned Dockerfile built into an immutable image your project's computers boot from. - name: Server diagnostics description: Connect-level health checks against a saved MCP server. - name: Primitives description: 'The server''s MCP primitives: tools, prompts, and resources.' - name: Export description: Full-server snapshots for diffing and CI. - name: Execution description: 'Run the server''s primitives: call tools, render prompts.' - name: Eval runs description: >- Asynchronous eval suite runs: create with 202, poll status, iterations, and traces. - name: OAuth description: 'Bring-your-own OAuth: import externally obtained tokens for a server.' - name: Chatboxes description: >- Read-only access to the chatboxes published from a project: listing, settings, attached servers, and share links. - name: Catalog description: >- Discover the resources the other routes operate on: your account, projects, servers, eval suites, and chat sessions. - name: Tunnels description: >- Relay tunnels that expose local MCP servers through a public URL, registered as first-class project servers (the `mcpjam tunnel` CLI flow). - name: Agent description: >- Headless agent turns over the public API: send a message history, the server runs one assistant turn with project-scoped workspace tools (eval reads + suite creation) on a pinned hosted model, and returns the reply plus created-resource references. paths: /host-catalog: get: tags: - Catalog summary: Get the host-compat catalog description: >- The versioned host-compatibility catalog backing `mcpjam compat` verdicts. Public and unauthenticated: static host facts and creation config with no project or user scope. Always returns a catalog — `source` is `live` when the backend publish was reachable and `bundled` when serving the SDK's built-in fallback. operationId: getHostCompatCatalog responses: '200': description: The latest catalog envelope. content: application/json: schema: type: object required: - schemaVersion - version - contentHash - publishedAt - catalog - source properties: schemaVersion: type: integer description: Catalog document schema version (currently 2). version: type: integer description: >- Monotonic backend publish version; 0 when `source` is `bundled`. contentHash: type: string description: >- SHA-256 of the canonical catalog JSON; empty when `source` is `bundled`. publishedAt: type: integer description: Publish time (ms epoch); 0 when `source` is `bundled`. source: type: string enum: - live - bundled description: >- Whether this envelope came from the backend publish or the SDK's bundled fallback. catalog: type: object required: - hostsById properties: hostsById: type: object description: >- Canonical host catalog keyed by host style. Each entry is the full host object: compare/display facts plus HostConfigInputV2 creation fields. additionalProperties: type: object required: - id - label - provenance - rendersMcpApps - hostStyle properties: id: type: string label: type: string provenance: type: string enum: - observed - probe - vendor-doc - assumed rendersMcpApps: type: boolean supportedProtocolVersions: type: array items: type: string verifiedAt: type: integer description: >- When this host's facts were last verified (ms epoch). imageSupport: type: object additionalProperties: true hostStyle: type: string mcpProfile: type: object description: >- Host MCP profile. MCP Apps capabilities and OpenAI compat live here. additionalProperties: true additionalProperties: true security: [] components: securitySchemes: bearerAuth: type: http scheme: bearer description: >- MCPJam API key (`sk_…`). Create one at [Settings → API keys](https://app.mcpjam.com/settings/api-keys). Guest sessions cannot use the API, and API keys cannot manage other API keys. ````