Koskamo

Data Butler MCP

Provides verified UK public data including tax rates, inflation, and exam specifications to AI agents via REST and MCP interfaces. It offers tools for looking up current rates, checking changes since a specific date, and resolving facts with official source URLs and verification dates.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Data Butler MCP logo, by Data ButlerCommunity listingStreamable HTTPNo sign-inEndpoint checked 2026-11-07Published by Data Butler
MCP endpoint (Streamable HTTP)
https://databutler.dev/api/mcp/uk-rates
Vendor documentation

What its tools do

1 tool, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Read-only (1)

1 of 1 have a description · 1 of 1 declare behavior hints · 1 of 1 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

  • Passed Endpoint answered the live check ·
  • Availability 1 of 1 checks passed in 30 days

What you can do with it

  • Lookup current UK tax-year rates and thresholds
  • Check which UK exam papers cover specific topics
  • Find changes to UK thresholds since a training cutoff date
  • Retrieve UK CPI and CPIH inflation data

Source and maintenance

Community listingRegistry 1.0.0
mcp-registry: io.github.physics-star-cat/databutler-uk-rates@1.0.0Source repositoryProject website
Maintenance checked

Protocol and capabilities

Server
databutler-uk-rates 1.1.0
MCP protocol negotiated in check
2025-11-25
Tools
1 advertised
Resources
Not advertised
Resource templates
Not advertised
Prompts
Not advertised
Server-advertised capabilities
{
  "tools": {}
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Current UK tax-year rates and thresholds from databutler.dev, each verified against gov.uk and returned with its taxYear, source URL and verification date. The figures change every April; every result names the tax year it applies to and carries cite.url, a databutler.dev permalink to the answer with its source.

Tools

1 advertised

uk_rates_lookup — UK rates lookup
Advertised by the server during the last successful anonymous check.
Advertised read-only

Current UK (2026-27) rates and thresholds, verified against gov.uk with source URLs and verification dates. Categories: income-tax, national-insurance, minimum-wage, student-loans, vat, isa, state-pension, state-pension-age, stamp-duty, capital-gains, pensions, dividends, savings, marriage-allowance, statutory-sick-pay, statutory-parental-pay, child-benefit. Covers UK income tax, National Insurance, minimum wage, student loans, VAT, ISAs, pensions, stamp duty, capital gains, dividends, savings, the State Pension and State Pension age, statutory sick/maternity/paternity pay and Child Benefit.

uk_rates_lookup input schema
{
  "type": "object",
  "properties": {
    "category": {
      "type": "string",
      "description": "one of: income-tax, national-insurance, minimum-wage, student-loans, vat, isa, state-pension, state-pension-age, stamp-duty, capital-gains, pensions, dividends, savings, marriage-allowance, statutory-sick-pay, statutory-parental-pay, child-benefit (omit to list all)"
    }
  }
}
uk_rates_lookup annotations
{
  "title": "UK rates lookup",
  "readOnlyHint": true,
  "openWorldHint": false,
  "idempotentHint": true,
  "destructiveHint": false
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks
1 of 1 (100%)
Average latency
696 ms
95th percentile latency
696 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

  • · probe · passed · 696 ms · metadata changed · 1 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.
Claude Code configuration
claude mcp add --transport http data-butler-mcp-databutler https://databutler.dev/api/mcp/uk-rates

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).
Codex configuration
codex mcp add data-butler-mcp-databutler --url https://databutler.dev/api/mcp/uk-rates

Cursor

Merge this server into .cursor/mcp.json in your project, then enable data-butler-mcp-databutler in your MCP settings.
Cursor configuration
{
  "mcpServers": {
    "data-butler-mcp-databutler": {
      "url": "https://databutler.dev/api/mcp/uk-rates"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).
Cline configuration
{
  "mcpServers": {
    "data-butler-mcp-databutler": {
      "type": "streamableHttp",
      "url": "https://databutler.dev/api/mcp/uk-rates",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start data-butler-mcp-databutler and inspect its tools.
VS Code configuration
{
  "servers": {
    "data-butler-mcp-databutler": {
      "type": "http",
      "url": "https://databutler.dev/api/mcp/uk-rates"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.
Gemini CLI configuration
gemini mcp add --transport http data-butler-mcp-databutler https://databutler.dev/api/mcp/uk-rates

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.
Claude Desktop configuration
https://databutler.dev/api/mcp/uk-rates

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.
Windsurf configuration
{
  "mcpServers": {
    "data-butler-mcp-databutler": {
      "serverUrl": "https://databutler.dev/api/mcp/uk-rates"
    }
  }
}

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