Calcgrid

https://tttkmbb.com/a2a

Open deterministic calculation and evidence-data engine for AI agents and people: finance, loans, health, fitness, math, statistics, unit conversion, pinned IANA time-zone rules, science and engineering, plus source-traceable mainland China working days and official UK bank holidays, lunar calendar and solar terms; available as HTML, Markdown, JSON API, MCP and A2A. The public Agent Card highlights 24 priority calculators, including a worldwide CLDR weekday baseline, broad OpenWorkdays national-scope reference, source-traceable mainland China and UK working-day tools and pinned IANA local-time resolution and transition tools, plus search and a generic execution entry; the A2A endpoint accepts every calculator id. Read-only, deterministic calculations; every result carries the formula, sources and an ISO 8601 timestamp.

52
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Sep 26Sep 29Oct 1Oct 4

Response time

p50 265ms · p95 476ms
0ms 200ms 400ms Sep 26Sep 29Oct 1Oct 4
Data table
Reliability history per time bucket over the last 30 days (daily).
Bucket Uptime Probes Response time
9/26/2026, 12:00:00 AM 100% 12 216ms
9/27/2026, 12:00:00 AM 100% 14 216ms
9/28/2026, 12:00:00 AM 100% 12 218ms
9/29/2026, 12:00:00 AM 100% 12 266ms
9/30/2026, 12:00:00 AM 100% 12 341ms
10/1/2026, 12:00:00 AM 100% 12 314ms
10/2/2026, 12:00:00 AM 100% 12 290ms
10/3/2026, 12:00:00 AM 100% 12 294ms
10/4/2026, 12:00:00 AM 100% 7 286ms
52
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
100

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
36

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
not yet measured

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
—
Networks
—
Facilitator
unknown
SDK
unknown

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
TuringSign Inc. d/b/a Cosmotown
Domain registered
2026-03-28
Hosting network
CLOUDFLARENET
Hosting country
—

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

searchdiscoverybusinessbusiness hours deadlinecross-border SLAChina UK deadlineworking timeIANA time zoneeverydayChina working dayChinese business day调休上班法定节假日add China business daysChinese working day deadline调休 deadlineChina SLA dateChina work calendarcount China business daysChina working days between dates调休 workday countChina SLAChina holiday calendarUK working dayUK bank holidayEngland Wales business dayScotland bank holidayNorthern Ireland working dayadd UK business daysUK deadlineEngland working daysScotland working daysNorthern Ireland SLAcount UK business daysUK SLA daysEngland Wales bank holidaysScotland business daysNorthern Ireland working daysglobal working dayworldwide weekdayweekend by countryISO territoryCLDRadd global working daysworldwide weekday offsetterritory business day baselineCLDR weekendcount global working daysworldwide weekday countterritory weekend countlunarlunar calendarchinese calendar converter农历ganzhisolar termlunar to solarchinese lunar date to gregorian农历转公历leap monthlunar birthdaysolar terms24 solar termsjieqi节气lichuntimeIANA tzdbambiguous local timenonexistent local timeDST overlapDST gapIANA time zone transitionsDST datesclock changeUTC offset historytzdb versiontime zone converterconvert time zoneswhat time is it inutc offsetdaylight saving timefinanceloan paymentmonthly paymentamortizationauto loanpersonal loanloan comparisoncompare loanscompare mortgage offerstotal cost of loan15 vs 30 year mortgagepublic holiday referenceOpenHolidaysnationwide holidaybusiness dayOpenHolidays deadlineOpenHolidays rangeOpenWorkdaysnational holidayOpenWorkdays deadlineOpenWorkdays rangecalculatorexecution