CalcBright Calculators
REMOTE · CALCBRIGHT.COM
160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency.
Available components
Last scanned (18 hours ago)
Scores higher than 47% of remote servers
Reachable. Last reached 18 Oct 2026.
Category Finance and Payments
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability63
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 22822 tokens (~136/item across 167 items; 167 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety75
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- 0 of 4 tool(s) whose name or description implies an irreversible operation declare an MCP destructiveHint annotation; "land_transfer_tax_calculator" implies "transfer" and declares readOnlyHint instead, contradicting what its own name says it does. See how to fix → Fail
- An AI judge read all 168 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 17 Oct 26 +1
- “body_surface_area_calculator” added an optional parameter “heightIn” cosmetic
- “body_surface_area_calculator” added an optional parameter “weightLb” cosmetic
- “take_home_pay_calculator” added an optional parameter “bahrain” cosmetic
- “401k_calculator” dropped the optional parameter “currency” cosmetic
4 cosmetic changes on this day. Switch on “Show cosmetic changes” to see them.
- 16 Oct 26 0
- The server rewrote its instructions, which are the text every model session reads security
- New tool “body_surface_area_calculator” functional
- New tool “interest_only_mortgage_calculator” functional
- New tool “permutation_combination_calculator” functional
- New tool “unit_price_calculator” functional
- New tool “weighted_average_calculator” functional
- 15 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 12 Oct 26 61
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 18 Oct 2026 · Probed https://calcbright.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=calcbright.com | CN=WE1,O=Google Trust Services,C=US | 10 Oct 2026 | 8 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | fd64dec770757eda0e3f86c99850958b |
| SANs: calcbright.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of calcbright.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| calcbright.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains |
| x-content-type-options | nosniff |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://calcbright.com/mcp | Verified | 200 | |
| http (plaintext) | http://calcbright.com/mcp | HTTPS enforced | 301 | https://calcbright.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
time_zone_converter Time Zone Converter ~104
9:00 AM in New York is 2:00 PM in London in summer. Convert any date and time between two cities with daylight saving applied for that date, plus a world clock. Web page: https://calcbright.com/time-zone-converter
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | From |
| to | string | – | To |
| when | string | – | Date & time Leave empty to use the current time. (YYYY-MM-DDTHH:MM) |
No output schema declared.
No examples provided.
tip_calculator Tip Calculator ~105
An 18% tip on $84 is $15.12. Enter the bill, pick a percentage and split the total between any number of people, with 10% to 25% tips compared side by side. Web page: https://calcbright.com/tip-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| bill | number | – | Bill amount |
| currency | string | – | Currency |
| people | number | – | Split between (people) |
| tip | number | – | Tip percentage (%) |
No output schema declared.
No examples provided.
triangle_calculator Triangle Calculator ~142
Know three parts of a triangle? Get the other three, plus area, perimeter, type and a scale drawing. SSS, SAS, ASA, AAS and the SSA ambiguous case all work. Web page: https://calcbright.com/triangle-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| a | number | – | Side a |
| angA | number | – | Angle A (°) |
| angB | number | – | Angle B (°) |
| angC | number | – | Angle C (between a and b) (°) |
| b | number | – | Side b |
| c | number | – | Side c |
| mode | string | – | What do you know? |
No output schema declared.
No examples provided.
uae_corporate_tax_calculator UAE Corporate Tax Calculator ~200
Calculate UAE corporate tax: 0% up to AED 375,000 and 9% above, Small Business Relief (revenue ≤ AED 3M, to 2029) and the 0% free zone regime. Web page: https://calcbright.com/uae-corporate-tax-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| nonQualIncome | number | – | Taxable income from non-qualifying activities |
| nonQualRevenue | number | – | Non-qualifying revenue (de minimis test) Must not exceed 5% of total revenue or AED 5 million, whichever is lower. |
| period | string | – | Tax period ends |
| profit | number | – | Taxable income (adjusted net profit) Accounting profit after the CT adjustments (e.g. 50% of entertainment, exempt dividends, loss relief). |
| regime | string | – | Business type |
| revenue | number | – | Annual revenue |
No output schema declared.
No examples provided.
uae_gratuity_calculator UAE Gratuity Calculator ~159
AED 10,000 basic for 7 years earns AED 55,000 in gratuity. Check your UAE end-of-service benefit: 21 days’ pay a year for 5 years, then 30, under the 2021 law. Web page: https://calcbright.com/uae-gratuity-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| basic | number | – | Last basic monthly salary Basic salary only – excluding housing, transport and other allowances. |
| end | string | – | Last working day Leave empty to use today's date. (YYYY-MM-DD) |
| start | string | – | Joining date (YYYY-MM-DD) |
| unpaid | number | – | Unpaid leave days (days) Days of unpaid absence are excluded from service. |
No output schema declared.
No examples provided.
unit_converter Unit Converter ~82
Convert cm to inches, kg to lbs, °C to °F and more in 18 categories, from length and weight to torque, flow rate and density, using exact conversion factors. Web page: https://calcbright.com/unit-converter
| Name | Type | Req | Description |
|---|---|---|---|
| from | string | – | From |
| to | string | – | To |
| value | number | – | Value |
No output schema declared.
No examples provided.
unit_price_calculator Unit Price Calculator ~173
A 500 g pack at $3.99 costs $0.80 per 100 g, so a 1 kg pack at $7.20 ($0.72) is the better buy. Compare up to three sizes in mixed units to find the lowest price. Web page: https://calcbright.com/unit-price-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| currency | string | – | Currency |
| p1 | number | – | Product A price |
| p2 | number | – | Product B price |
| p3 | number | – | Product C price |
| q1 | number | – | Size |
| q2 | number | – | Size |
| q3 | number | – | Size |
| u1 | string | – | Unit |
| u2 | string | – | Unit |
| u3 | string | – | Unit |
No output schema declared.
No examples provided.
unix_timestamp_converter Unix Timestamp Converter ~125
1700000000 is 2023-11-14T22:13:20Z. Paste an epoch value in seconds or milliseconds to get a readable UTC and ISO 8601 date, or turn a date into a timestamp. Web page: https://calcbright.com/unix-timestamp-converter
| Name | Type | Req | Description |
|---|---|---|---|
| dt | string | – | Date and time (UTC) Empty = now. (YYYY-MM-DDTHH:MM) |
| mode | string | – | Convert |
| ts | number | – | Unix timestamp Seconds or milliseconds – detected automatically. Empty = now. |
No output schema declared.
No examples provided.
vat_calculator VAT Calculator ~130
Removing 20% VAT means dividing by 1.2, not taking 20% off. Add or strip VAT at any rate, with 2026 standard rates for 177 countries, UK to UAE. Web page: https://calcbright.com/vat-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| amount | number | – | Net amount (excl. VAT) |
| country | string | – | Country |
| currency | string | – | Currency |
| mode | string | – | Calculation |
| rate | number | – | Other rate (optional) (%) Leave empty for the country’s standard rate, or enter a reduced rate. |
No output schema declared.
No examples provided.
volume_calculator Volume Calculator ~105
A 30 × 20 × 10 cm box holds exactly 6 litres. Get the volume of a cube, box, cylinder, sphere, cone or pyramid with its formula, in litres and gallons too. Web page: https://calcbright.com/volume-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| shape | string | – | Shape |
| unit | string | – | Unit |
| x | number | – | Length |
| y | number | – | Width |
| z | number | – | Height |
No output schema declared.
No examples provided.
waist_to_hip_ratio_calculator Waist-to-Hip Ratio Calculator ~170
A waist of 86 cm over hips of 100 cm gives a WHR of 0.86. Enter your measurements in cm or inches and compare with the WHO thresholds of 0.90 and 0.85. Web page: https://calcbright.com/waist-to-hip-ratio-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| hipCm | number | – | Hips (widest point) (cm) |
| hipIn | number | – | Hips (widest point) (in) |
| sex | string | – | Sex |
| units | string | – | Units |
| waistCm | number | – | Waist (narrowest point / at navel) (cm) |
| waistIn | number | – | Waist (narrowest point / at navel) (in) |
No output schema declared.
No examples provided.
water_intake_calculator Water Intake Calculator ~114
A 70 kg adult who exercises 30 minutes a day needs about 2.8 L of water. Get your own daily target in litres, cups and ounces from weight, exercise and climate. Web page: https://calcbright.com/water-intake-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| climate | string | – | Climate |
| kg | number | – | Weight (kg) |
| lb | number | – | Weight (lb) |
| minutes | number | – | Exercise per day (min) |
| units | string | – | Units |
No output schema declared.
No examples provided.
week_number_calculator Week Number Calculator ~89
January 1, 2026 is in ISO week 1, which began on December 29, 2025. Get the week number of any date, its Monday and Sunday, the day of the year and days left. Web page: https://calcbright.com/week-number-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | – | Date Leave empty to use today's date. (YYYY-MM-DD) |
No output schema declared.
No examples provided.
weighted_average_calculator Weighted Average Calculator ~206
Scores of 85, 90 and 78 weighted 30%, 20% and 50% average 82.5, not 84.3. Enter up to six values with their weights and see the working and the simple average. Web page: https://calcbright.com/weighted-average-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| v1 | number | – | Value 1 |
| v2 | number | – | Value 2 |
| v3 | number | – | Value 3 |
| v4 | number | – | Value 4 |
| v5 | number | – | Value 5 |
| v6 | number | – | Value 6 |
| w1 | number | – | Weight 1 |
| w2 | number | – | Weight 2 |
| w3 | number | – | Weight 3 |
| w4 | number | – | Weight 4 |
| w5 | number | – | Weight 5 |
| w6 | number | – | Weight 6 |
No output schema declared.
No examples provided.
word_counter Word Counter ~66
A 1,000-word article takes about 4 min 12 sec to read. Paste text for words, characters with and without spaces, sentences, speaking time and top keywords. Web page: https://calcbright.com/word-counter
| Name | Type | Req | Description |
|---|---|---|---|
| text | string | – | Your text |
No output schema declared.
No examples provided.
z_score_calculator Z-Score Calculator ~134
Scored 85 with a mean of 70 and SD of 10? That is z = 1.5, the 93.32nd percentile. Get z-scores, tail probabilities or the value for any percentile. Web page: https://calcbright.com/z-score-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| mean | number | – | Mean (μ) |
| mode | string | – | Calculate |
| pct | number | – | Percentile (%) Share of values below x |
| sd | number | – | Standard deviation (σ) |
| x | number | – | Raw score (x) |
| z | number | – | z-score |
No output schema declared.
No examples provided.
zakat_calculator Zakat Calculator ~263
Zakat is 2.5% of net wealth above the nisab. List cash, gold, silver, shares and business assets, deduct debts due now, and compare against today’s live nisab. Web page: https://calcbright.com/zakat-calculator
| Name | Type | Req | Description |
|---|---|---|---|
| basis | string | – | Nisab basis |
| business | number | – | Business assets Stock for sale and business cash |
| cash | number | – | Cash & bank balances At home, in accounts and wallets |
| currency | string | – | Currency |
| debts | number | – | Debts & bills due now Immediate liabilities only – not the full balance of long-term loans |
| gold | number | – | Value of gold Market value of gold you own |
| goldPrice | number | – | Gold price per gram (24k) Leave empty to use today’s live market price, or type your local price. |
| investments | number | – | Investments & shares Market value of shares, funds, crypto |
| receivables | number | – | Money owed to you Loans you expect to be repaid |
| silver | number | – | Value of silver |
| silverPrice | number | – | Silver price per gram Leave empty to use today’s live market price, or type your local price. |
No output schema declared.
No examples provided.
How do I install the CalcBright Calculators MCP server?
CalcBright Calculators is a hosted endpoint at https://calcbright.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · calcbright.com
claude mcp add --transport http com-calcbright-calcbright 'https://calcbright.com/mcp'
What is the CalcBright Calculators MCP server?
CalcBright Calculators is an MCP server listed in the public MCP registry as com.calcbright/calcbright. 160+ calculators: take-home pay for 166 countries, mortgage, loan, VAT, BMI, dates, units, currency. This page covers its hosted endpoint (https://calcbright.com/mcp).
Is the CalcBright Calculators MCP server safe to use?
CalcBright Calculators scores 64 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the CalcBright Calculators MCP server expose?
CalcBright Calculators exposes 167 tools: mortgage_calculator, loan_calculator, compound_interest_calculator, salary_calculator, percentage_calculator, and 162 more. Their descriptions and schemas cost roughly 22,761 tokens of context every time the server is loaded.
Does the CalcBright Calculators MCP server require authentication?
No. We connected to CalcBright Calculators without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the CalcBright Calculators MCP server still maintained?
CalcBright Calculators is still listed as active in the MCP registry. We last reached this channel on 18 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.