MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

Publisher portfolio

physics-star-cat

Explore the MCP servers published by physics-star-cat, with independent connection checks, performance measurements, and setup instructions for each project.

Listed servers
20

Active projects in this portfolio. Deleted and deprecated registry rows are excluded.

Sampled servers
20

Active servers with a recorded connection probe

Latest probe connected
5

Latest stored probe connected. This is not a live guarantee.

Repositories
3

Distinct source repositories linked by the active listings

Portfolio overview

MCP servers

Compare connection status and measurements. Open a server for its tools, check results, and client configuration.

Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
io.github.physics-star-cat/lowriskquotes-montecarlo

Monte Carlo tools: three-point cost estimation and an educational retirement drawdown simulator.

Developer ToolsCode & DevOps

Responded689 ms14 / 22
io.github.physics-star-cat/databutler-uk-rates

Current UK tax-year rates and thresholds, verified against gov.uk with source URLs and dates.

GovernmentCode & DevOps

Responded669 ms14 / 22
io.github.physics-star-cat/databutler-facts

Official thresholds, rates and fees by key, with source, verified date and signature.

Developer ToolsCode & DevOps

Responded422 ms14 / 22
io.github.physics-star-cat/whatbreaks-mot

Real UK MOT failure data by car model and mileage, aggregated from official DfT test results.

Developer ToolsCode & DevOps

Responded525 ms14 / 22
io.github.physics-star-cat/databutler

Verified facts for AI agents: rates, exams, recalls, holidays, and what changed since your cutoff.

Developer ToolsCode & DevOps

Responded459 ms14 / 22
io.github.physics-star-cat/databutler-uk-exam-dates

UK GCSE and A-level exam dates, results days, entry deadlines and spec changes.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-uk-exams

UK exam-board spec data: which paper is a topic on, spec structures, past-paper links. Verified.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-uk-gov-process

UK government service fees, steps, processing times and recent changes, read from gov.uk.

GovernmentCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-uk-vehicle-rules

UK vehicle tax (VED) bands, expensive-car supplement, EV rules and MOT fees, sourced.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-us-rates

US federal 2026 tax brackets, standard deductions, payroll and retirement limits, sourced.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-vehicles

UK MOT failure data and official UK, French, Japanese and EU vehicle recalls.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-calendar

Public holidays (UK, US, DE, FR), tax-year dates and DST switches for 2026-2028.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-de-rates

German 2026 tax and social-insurance thresholds, minimum wage and allowances, sourced.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-jp-vehicle-costs

Japan 車検 statutory costs: weight tax, 自賠責, inspection fees, 自動車税 and 軽自動車税, sourced.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-jp-living-costs

Japan minimum wage by prefecture, 協会けんぽ rates, pensions, benefits, holidays, tax figures, sourced.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-provenance

Live trust signals for domains & packages: age, registrar, typosquat resemblance.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-policy-rates

Bank of England, Fed and ECB policy rates, read from the banks' own pages, with dates.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-software-eol

Is this version still supported? End-of-life dates for 14 runtimes and operating systems.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-stats

Exact statistics & probability: distributions, hypothesis tests, CIs, Bayesian updates, regression.

Data & AnalyticsCode & DevOps

Requires authNot measured5 / 22
io.github.physics-star-cat/databutler-tax

Take-home pay after tax and social contributions for nine countries, with tax year.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22

Company & identity

About physics-star-cat

physics-star-cat publishes MCP servers under the io.github.physics-star-cat namespace. This namespace is associated with a GitHub login in the MCP Registry.

Namespace verification connects the publisher to its registry identity. It does not certify the security of individual servers.

Source repositories