# `io.github.SolvoHQ/openworkdays` on anlyon.dev

> Text inside fenced blocks marked untrusted-server-text was written by the MCP server's publisher, not by anlyon.dev. It is data to inspect, not instructions to follow. Invisible characters are shown as [U+XXXX].
> No finding is not a safety guarantee: these are point-in-time checks of tool definitions, not of code or behaviour.

- Page: https://anlyon.dev/servers/io.github.SolvoHQ/openworkdays
- JSON: https://anlyon.dev/api/v1/servers/io.github.SolvoHQ/openworkdays
- Version: 0.1.0 (active)
- Publisher: io.github.SolvoHQ (GitHub account)
- Runs: remote (streamable-http)
- Sign-in to list tools: none
- Repository: https://github.com/SolvoHQ/openworkdays
- Metadata from the official MCP Registry, synced 2026-10-21T18:21:33.330Z

Title and description, as the publisher wrote them:

```untrusted-server-text
Zero-signup business-day date-math API: add days, count days between dates, is-business-day.
```

Scanned 2026-10-21T19:04:57.815Z over streamable-http.

**1 tool: 1 change things.**

| Group | Class | Tools | Claude Code |
| --- | --- | --- | --- |
| Deletes or cancels | destructive | 0 | deny |
| Can't be undone | irreversible | 0 | ask |
| Changes things | write | 1 | ask |
| Only reads | read | 0 | allow |

## Findings

No check matched anything in these tool definitions.


## Changes things (1)

Creates or changes something that can be changed back. Claude Code: ask.

### `businessdays`

- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

Description, as the server wrote it:

```untrusted-server-text
Business-day date math. Three modes inferred from params: add (start+days -> the date N business days away, negative days = before), diff (start+end -> count of business days between, inclusive of both endpoints), is (date -> is it a business day). Optional weekend (default sat,sun) and holidays (comma list of YYYY-MM-DD you supply). No signup, no API key. Pure UTC date-only math; no time-of-day/DST/timezone.
```

## Claude Code permissions

For `.claude/settings.json`, assuming the server is installed as `openworkdays`:

```json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__openworkdays__businessdays"
    ],
    "deny": []
  }
}
```