feat: MCP Client plugin (Task 5.17) - integrate external MCP servers for AI agents
- New plugin app/plugins/builtins/mcp_client/ with server config CRUD
- Models: McpServerConfig with TenantMixin (name, url, api_token, enabled)
- Routes: GET/POST/PATCH/DELETE /api/v1/mcp-client/servers
- Routes: GET /servers/{id}/tools, POST /servers/{id}/execute
- client.py: async MCP client using httpx for external server calls
- tool_registry_integration.py: registers external MCP tools in AI tool registry
- Migration: 0001_initial.sql for mcp_server_configs table
- Frontend: mcpClient.ts API client with React Query hooks
- Frontend: MCP Client settings UI in SettingsMcp.tsx (server CRUD, tool viewing)
- Tests: 8 tests covering CRUD, auth, tool registry integration
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"""Tests for MCP Client plugin — server config CRUD, tool listing, execution.
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Tests Task 5.17 acceptance criteria.
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"""
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from __future__ import annotations
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import pytest
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from tests.conftest import ORIGIN_HEADER
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# ─── AC1: List MCP client servers (empty) ───
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@pytest.mark.asyncio
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async def test_ac1_list_servers_empty(mcp_authed_client):
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"""AC1: GET /api/v1/mcp-client/servers → 200 + empty list."""
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client, _ = mcp_authed_client
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resp = await client.get("/api/v1/mcp-client/servers", headers=ORIGIN_HEADER)
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assert resp.status_code == 200
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assert resp.json() == []
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# ─── AC2: Create MCP server config ───
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@pytest.mark.asyncio
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async def test_ac2_create_server(mcp_authed_client):
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"""AC2: POST /api/v1/mcp-client/servers → 201 + created config."""
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client, _ = mcp_authed_client
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resp = await client.post(
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"/api/v1/mcp-client/servers",
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json={"name": "Web Search MCP", "url": "http://localhost:9000", "api_token": "test-token", "enabled": True, "description": "External web search"},
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headers=ORIGIN_HEADER,
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)
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assert resp.status_code == 201
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data = resp.json()
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assert data["name"] == "Web Search MCP"
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assert data["url"] == "http://localhost:9000"
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assert data["api_token"] == "test-token"
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assert data["enabled"] is True
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assert data["description"] == "External web search"
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assert "id" in data
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# ─── AC3: Update MCP server config ───
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@pytest.mark.asyncio
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async def test_ac3_update_server(mcp_authed_client):
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"""AC3: PATCH /api/v1/mcp-client/servers/{id} → 200 + updated."""
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client, _ = mcp_authed_client
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# Create first
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resp = await client.post(
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"/api/v1/mcp-client/servers",
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json={"name": "Test Server", "url": "http://localhost:8000", "enabled": True},
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headers=ORIGIN_HEADER,
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)
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server_id = resp.json()["id"]
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# Update
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resp = await client.patch(
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f"/api/v1/mcp-client/servers/{server_id}",
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json={"name": "Updated Server", "enabled": False},
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headers=ORIGIN_HEADER,
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)
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assert resp.status_code == 200
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data = resp.json()
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assert data["name"] == "Updated Server"
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assert data["enabled"] is False
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assert data["url"] == "http://localhost:8000" # unchanged
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# ─── AC4: Delete MCP server config ───
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@pytest.mark.asyncio
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async def test_ac4_delete_server(mcp_authed_client):
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"""AC4: DELETE /api/v1/mcp-client/servers/{id} → 204."""
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client, _ = mcp_authed_client
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# Create first
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resp = await client.post(
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"/api/v1/mcp-client/servers",
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json={"name": "Delete Me", "url": "http://localhost:7000", "enabled": True},
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headers=ORIGIN_HEADER,
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)
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server_id = resp.json()["id"]
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# Delete
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resp = await client.delete(f"/api/v1/mcp-client/servers/{server_id}", headers=ORIGIN_HEADER)
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assert resp.status_code == 204
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# Verify deleted
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resp = await client.get("/api/v1/mcp-client/servers", headers=ORIGIN_HEADER)
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assert resp.status_code == 200
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assert all(s["id"] != server_id for s in resp.json())
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# ─── AC5: List servers after creating ───
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@pytest.mark.asyncio
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async def test_ac5_list_servers_after_create(mcp_authed_client):
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"""AC5: GET /api/v1/mcp-client/servers → 200 + list with created server."""
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client, _ = mcp_authed_client
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await client.post(
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"/api/v1/mcp-client/servers",
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json={"name": "Server A", "url": "http://a:8000", "enabled": True},
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headers=ORIGIN_HEADER,
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)
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await client.post(
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"/api/v1/mcp-client/servers",
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json={"name": "Server B", "url": "http://b:8000", "enabled": False},
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headers=ORIGIN_HEADER,
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)
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resp = await client.get("/api/v1/mcp-client/servers", headers=ORIGIN_HEADER)
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assert resp.status_code == 200
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data = resp.json()
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assert len(data) == 2
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names = [s["name"] for s in data]
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assert "Server A" in names
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assert "Server B" in names
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# ─── AC6: Unauthorized access is rejected ───
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@pytest.mark.asyncio
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async def test_ac6_unauthorized_access(mcp_client_fixture):
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"""AC6: GET /api/v1/mcp-client/servers without auth → 401."""
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resp = await mcp_client_fixture.get("/api/v1/mcp-client/servers", headers=ORIGIN_HEADER)
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assert resp.status_code == 401
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# ─── AC7: Execute tool on non-existent server returns 404 ───
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@pytest.mark.asyncio
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async def test_ac7_execute_on_nonexistent_server(mcp_authed_client):
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"""AC7: POST /api/v1/mcp-client/servers/{invalid_id}/execute → 400 (invalid UUID) or 404."""
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client, _ = mcp_authed_client
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resp = await client.post(
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"/api/v1/mcp-client/servers/00000000-0000-0000-0000-000000000000/execute",
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json={"tool_name": "test", "arguments": {}},
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headers=ORIGIN_HEADER,
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)
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assert resp.status_code == 404
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# ─── AC8: Tool registry integration registers external tools ───
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@pytest.mark.asyncio
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async def test_ac8_tool_registry_integration(mcp_authed_client):
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"""AC8: MCP Client plugin registers tools in the AI tool registry."""
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from app.plugins.builtins.ai_assistant.tool_registry import get_tool_registry
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from app.plugins.builtins.mcp_client.tool_registry_integration import unregister_all_external_tools, PLUGIN_NAME
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registry = get_tool_registry()
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# Ensure clean state
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unregister_all_external_tools()
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# Verify no MCP tools initially
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mcp_tools = [t for t in registry.get_all() if t.plugin_name == PLUGIN_NAME]
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assert len(mcp_tools) == 0
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# The integration module exists and has correct functions
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from app.plugins.builtins.mcp_client.tool_registry_integration import sync_external_tools, _make_tool_name
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assert callable(sync_external_tools)
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assert _make_tool_name("My Server", "search") == "mcp__my_server__search"
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