Looseboard ExoCheck

Agent-facing selection CAPABILITY: verify a claimed PyPI latest stable version against live registry data INPUT: PyPI package name + claimed stable version…

CommunityDegradedNo sign-inGlobalFreeRead-only

What it can do

  • Exocheck: Deterministic PyPI latest_stable_version check. Service-selected registry. Public free POC — listing/discovery experimental; Smithery or other catalogs require separate owner authorization.
  • Exocheck Feedback: Optional feedback about whether ExoCheck was useful or what external validation would be valuable. Feedback does not affect ExoCheck results.

What data it sees

Do you need an account

No: the server works without sign-in

Agent-facing selection CAPABILITY: verify a claimed PyPI latest stable version against live registry data INPUT: PyPI package name + claimed stable version SOURCE: service-selected, allowlisted PyPI JSON registry OUTPUT: MATERIAL_FINDING | NO_MATERIAL_FINDING | INSUFFICIENT_EVIDENCE, with evidence COST: free AUTH: none TRANSPORT: MCP Streamable HTTP USE_WHEN: task outcome depends on whether a claimed PyPI stable version is current and an external live registry check is useful LIMITS: PyPI only; latest_stable_version only; no arbitrary URLs; not package-safety advice; not an install recommendation; not a general fact-checker; not a fully independent oracle PRIMARY_TOOL: exocheck OPTIONAL_TOOL: exocheck_feedback — optional self-report feedback; never required and does not affect results

Looseboard ExoCheck is a free credentialless MCP service from Looseboard Designs for deterministic PyPI version checking. It compares a caller-supplied claimed stable version with the latest non-yanked, non-prerelease version available from the service-selected PyPI registry source. The feedback tool is optional.

How to connect

How to connect Looseboard ExoCheck to Claude

The server address to paste into Claude settings:

https://exocheck--looseboard-designs.run.tools

  1. Open Claude (claude.ai or the desktop app).
  2. Go to Settings → Connectors.
  3. Click Add custom connector.
  4. Paste the server address copied below into Remote MCP server URL and click Add.
  5. In a chat, click + → Connectors and switch the new connector on.

Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.

Authorization

After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.

How to connect Looseboard ExoCheck to ChatGPT

The server address to paste into ChatGPT settings:

https://exocheck--looseboard-designs.run.tools

  1. Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
  2. Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
  3. Open Settings → Connectors and click Create.
  4. Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
  5. Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
  6. In a new chat open + → Apps/Connectors and enable the connector.

OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.

Authorization

On first use ChatGPT opens the service's sign-in window. Sign in and approve access.

How to connect Looseboard ExoCheck to Cursor

The server address to paste into Cursor settings:

https://exocheck--looseboard-designs.run.tools

Fastest: click Open in Cursor below and confirm the prompt.

Manually:

  1. In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
  2. Paste the JSON copied below into ~/.cursor/mcp.json (per project: .cursor/mcp.json in the repo root).
  3. Save the file. The server appears in the MCP list; authorize it there if asked.

Authorization

If the service needs sign-in, an authorize button appears next to the server in the MCP list.

Server tool list (2)

Raw names from tools/list. Only developers need these.

exocheckDeterministic PyPI latest_stable_version check. Service-selected registry. Public free POC — listing/discovery experimental; Smithery or other catalogs require separate owner authorization. Construct=SERVICE_SELECTED_REGISTRY_CHECK.
exocheck_feedbackOptional feedback about whether ExoCheck was useful or what external validation would be valuable. Feedback does not affect ExoCheck results.