Safe maths and statistics, and UK working-day arithmetic using official bank holidays
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Call this server's tools from your browser. Nothing to install.
Optional. Bearer <key> for more than the free daily allowance; free key from POST https://ukdata.reliness.co.uk/keys
Requests go through mcptry because browsers can't call most MCP servers directly. Header values are sent to the server for that request only and are never stored or logged.
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Evaluate an expression (+ - * / ^ %, sqrt, ln, log, round, min, max, pi) or summary statistics of a list of numbers. (cost: 1 credit)
array or comma list of numbers
string
This tool isn't marked read-only, so it may change something on the server or in an account you connected.
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
Run in a terminal
claude mcp add --transport http maths-dates https://ukdata.reliness.co.uk/mcp/maths-dates
Headers
Authorization (optional, not in the config above): Optional. Bearer <key> for more than the free daily allowance; free key from POST https://ukdata.reliness.co.uk/keysEvaluate an expression (+ - * / ^ %, sqrt, ln, log, round, min, max, pi) or summary statistics of a list of numbers. (cost: 1 credit)
| Argument | Type | Description |
|---|---|---|
| values | any | array or comma list of numbers |
| expression | string | string |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"values": {
"anyOf": [
{
"type": "array",
"items": {
"type": "string"
}
},
{
"type": "string"
}
],
"description": "array or comma list of numbers"
},
"expression": {
"type": "string",
"description": "string"
}
}
}UK working days between two dates, or the date N working days after/before a date, skipping weekends and bank holidays. (cost: 1 credit)
| Argument | Type | Description |
|---|---|---|
| to | string | YYYY-MM-DD |
| from | string | YYYY-MM-DD, required |
| addDays | number | string | number |
| division | string | england-and-wales|scotland|northern-ireland |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"to": {
"type": "string",
"description": "YYYY-MM-DD"
},
"from": {
"type": "string",
"description": "YYYY-MM-DD, required"
},
"addDays": {
"type": [
"number",
"string"
],
"description": "number"
},
"division": {
"type": "string",
"description": "england-and-wales|scotland|northern-ireland"
}
}
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 4, 2026.
No readOnlyHint / destructiveHint annotations, so clients can't tell a read from a write without asking.
Fix: Add annotations to each tool, e.g. { readOnlyHint: true } for tools that only read.