@lastest/mcp-server

MCP server for Claude Code, Cursor, Windsurf, Cline, and Claude Desktop. Lets AI agents run visual regression tests, review screenshot diffs, and approve baselines on a Lastest instance through the Model Context Protocol.

Quick start

npx -y @lastest/mcp-server@latest --url https://your-lastest-instance --api-key YOUR_API_KEY

Generate an API key in the Lastest UI: Settings → Runners & API Access → Create API Key (shown only once). The server speaks MCP over stdio — wire it into any compatible client below.

Compatible clients

| Client | Status | Install method | |--------|--------|----------------| | Claude Code | Verified | claude mcp add (see below) | | Claude Desktop | Verified | claude_desktop_config.json | | Cursor | Verified | ~/.cursor/mcp.json | | Windsurf | Verified | MCP config (generic JSON) | | Cline | Verified | MCP config (generic JSON) |

Any MCP-compliant client that can launch a stdio server with arguments works.

Install — Claude Code

claude mcp add lastest -- npx -y @lastest/mcp-server@latest \
  --url https://your-lastest-instance \
  --api-key YOUR_API_KEY

Verify with claude mcp list.

Install — Claude Desktop / Cursor / Windsurf / Cline

Add to claude_desktop_config.json, ~/.cursor/mcp.json, or your client's MCP config:

{
  "mcpServers": {
    "lastest": {
      "command": "npx",
      "args": [
        "-y",
        "@lastest/mcp-server@latest",
        "--url",
        "https://your-lastest-instance",
        "--api-key",
        "YOUR_API_KEY"
      ]
    }
  }
}

Restart the client.

What an agent can do

• List repositories, tests, functional areas, builds, and active jobs
• Create AI-authored tests from a URL or natural-language prompt
• Update or delete tests and functional areas
• Trigger test runs and read run results
• Inspect visual diffs and approve / reject baselines individually or in bulk
• Heal failing tests with AI based on the latest run
• Pull QA summaries, build review reports, and coverage stats

Tools exposed

The server registers 33 MCP tools (all prefixed lastest_). Every tool returns a structured { status, summary, actionRequired?, details } payload.

| Category | Tools | |----------|-------| | Health & jobs | lastest_health_check, lastest_list_active_jobs, lastest_get_job_status | | Repositories | lastest_list_repos, lastest_get_repo, lastest_create_repo, lastest_update_repo | | Functional areas | lastest_list_areas, lastest_create_area, lastest_update_area, lastest_delete_area, lastest_list_tests_by_area | | Tests | lastest_list_tests, lastest_list_failing_tests, lastest_get_test, lastest_create_test, lastest_update_test, lastest_delete_test, lastest_heal_test | | Runs & builds | lastest_run_tests, lastest_get_test_run, lastest_list_builds, lastest_get_build_status, lastest_review_build | | Diffs & baselines | lastest_get_diff, lastest_get_visual_diff, lastest_approve_diff, lastest_reject_diff, lastest_approve_all_diffs, lastest_approve_baseline, lastest_reject_baseline | | Coverage & QA | lastest_get_coverage, lastest_qa_summary |

CLI

lastest-mcp --url <url> --api-key <key>

Both flags are required. The process communicates with the host client over stdio.

Requirements: Node.js 18+ and a reachable Lastest instance.

Authentication

The server authenticates against Lastest's REST API (/api/v1/*) with a Bearer token. Manage and revoke keys from Settings → Runners & API Access in the Lastest UI.

Troubleshooting

| Symptom | Fix | |---------|-----| | Failed to connect to Lastest at … | Check the URL is reachable from this machine and that the API key is valid. | | Lastest API error 401 | Token revoked or expired — generate a new one in Settings. | | Tools don't appear in Claude Code | Run claude mcp list; if missing re-run claude mcp add. Restart the client. | | Tools don't appear in Cursor / Windsurf / Cline | Confirm the JSON config is valid and the client was fully restarted. |

Local development

git clone https://github.com/las-team/lastest
cd lastest/packages/mcp-server
pnpm install
pnpm dev -- --url http://localhost:3000 --api-key <key>

Used with

• Lastest — visual regression testing platform with screenshot diffs and AI test authoring
• @lastest/runner — self-hosted runner so AI-triggered tests execute on your infra
• Model Context Protocol — open standard powering tool use in Claude, Cursor, Windsurf, and others

Links

• Homepage: https://lastest.cloud
• GitHub: https://github.com/las-team/lastest
• Wiki: https://github.com/las-team/lastest/wiki/MCP-Server
• Issues: https://github.com/las-team/lastest/issues
• npm: https://www.npmjs.com/package/@lastest/mcp-server

License

FSL-1.1-ALv2 — see LICENSE.