Calculator for Grading
REMOTE · CALCULATORFORGRADING.COM
Grades from questions wrong, final exam score needed, weighted grades, GPA, SAT/ACT/MCAT scores.
Available components
Last scanned (3 hours ago)
Scores higher than 60% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Education and Research
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 Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- 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 Usability59
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1446 tokens (~241/item across 6 items; 6 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 Management40
- Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage90
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 65% of tool parameters carry a description.Partial
- Structured output schemas are declared (100% of tools); any adoption earns full credit.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 6 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 7 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 33 to 37. That category is still filling its 30-day observation window: 10 days of observed history at the previous scan, 11 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 27 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.
- 25 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 24 Oct 26 67
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 5 Nov 2026 · Probed https://calculatorforgrading.com/mcp?src=mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=calculatorforgrading.com | CN=WE1,O=Google Trust Services,C=US | 2 Oct 2026 | 31 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | e3823aa191d023210efa4a99d204d6cd |
| SANs: calculatorforgrading.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 calculatorforgrading.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| calculatorforgrading.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 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://calculatorforgrading.com/mcp?src=mcp | Verified | 200 | |
| http (plaintext) | http://calculatorforgrading.com/mcp?src=mcp | HTTPS enforced | 301 | https://calculatorforgrading.com/mcp?src=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 →
final_grade_needed Score needed on the final ~257
Use this when a student asks what score they need on a final exam (or last assignment) to reach a target grade, given the current grade and how much the final counts. Returns the needed percent, whether it is secured or out of reach, what a 0 and a 100 would leave, and the need for every letter. Works with percents (current_grade_percent + final_weight_percent) or with points (points_earned_so_far, points_possible_so_far, final_exam_points). Do not use it for a weighted average of categories.
| Name | Type | Req | Description |
|---|---|---|---|
| current_grade_percent | number | – | Current course grade in percent before the final. |
| final_exam_points | number | – | Points mode: points the final is worth. |
| final_weight_percent | number | – | How much of the course grade the final counts, in percent. |
| points_earned_so_far | number | – | Points mode: points earned so far. |
| points_possible_so_far | number | – | Points mode: points possible so far. |
| scale | string | – | 10_point (default) or plus_minus, used to read a letter target. |
| target_grade | string|number | yes | Wanted grade: a percent (90) or a letter (B+). |
| Name | Type | Req | Description |
|---|---|---|---|
| final_counts_percent | number | yes | – |
| hundred_on_final_gives_percent | number | yes | – |
| hundred_on_final_letter | string | yes | – |
| letters | array | yes | – |
| link | string | yes | Page of calculatorforgrading.com with the same inputs filled in. |
| needed_on_final_percent | number|null | yes | – |
| scale | string | yes | – |
| target | string | yes | – |
| target_percent | number | yes | – |
| verdict | string | yes | – |
| zero_on_final_gives_percent | number | yes | – |
| zero_on_final_letter | string | yes | – |
No examples provided.
gpa_calculator GPA from course grades ~170
Use this when a student wants their GPA from letter grades and credits, high school (honors +0.5, AP/IB +1.0 on passing grades, weighted and unweighted) or college (credit hours, unweighted). Returns unweighted and weighted GPA with the points of each course. Credits default to 1 (hs) or 3 (college). Do not use it for a single test grade or for a school-specific formula such as UC or LSAC.
| Name | Type | Req | Description |
|---|---|---|---|
| courses | array | yes | – |
| mode | string | – | hs = high school with weighting (default); college = unweighted. |
| scale | string | – | 4.0 (A+ counts 4.0, default) or 4.3 (A+ counts 4.3). |
| Name | Type | Req | Description |
|---|---|---|---|
| courses | array | yes | – |
| credits | number | yes | – |
| gpa_unweighted | number | yes | – |
| gpa_weighted | number|null | yes | – |
| link | string | yes | Page of calculatorforgrading.com with the same inputs filled in. |
| mode | string | yes | – |
| scale | string | yes | – |
No examples provided.
grade_calculator Grade from questions wrong ~343
Use this when a student or teacher wants the percent and letter grade for a test from the number of questions wrong (or correct), e.g. "7 wrong out of 40". Returns the percent, the letter on the chosen scale, how many more correct answers reach the next letter, and optionally a chart of every possible number wrong. Do not use it for a final-exam target, weighted categories, GPA or test scores. Needs only numbers; never ask for names.
| Name | Type | Req | Description |
|---|---|---|---|
| correct | integer | – | Questions correct. Give wrong or correct, not both. |
| custom_cutoffs | array | – | Optional own cut-off percents, highest grade first, strictly descending (10_point: A, B, C, D = 4 numbers; plus_minus: 12 numbers). Use only when the user gives them. |
| decimals | integer | – | Decimals shown in the percent (default 0). |
| include_chart | boolean | – | Also return a chart row for each possible number wrong (first 60 rows). |
| rounding | string | – | nearest rounds half up (default); down never rounds up, for teachers who truncate. |
| scale | string | – | 10_point = A 90, B 80, C 70, D 60 (default); 7_point = A 93, B 85, C 77, D 70; plus_minus = the site's preset with A+ 97 ... D- 60; pass_fail = pass at 60. |
| total_questions | integer | yes | Number of questions or points on the test. |
| wrong | integer | – | Questions wrong. Give wrong or correct, not both. |
| Name | Type | Req | Description |
|---|---|---|---|
| chart | array | – | – |
| correct | integer | yes | – |
| letter | string | yes | – |
| link | string | yes | Page of calculatorforgrading.com with the same inputs filled in. |
| next_letter | – | yes | – |
| percent_exact | number | yes | – |
| percent_shown | number | yes | – |
| rule | string | yes | – |
| scale | string | yes | – |
| total_questions | integer | yes | – |
| wrong | integer | yes | – |
No examples provided.
grading_scale_facts Grading scale cut-offs with sources ~112
Use this when someone asks what a grading scale is: the 10-point scale (A 90-100), the 7-point scale (A 93-100), the plus-minus scale with GPA points on 4.0 and 4.3, or the College Board percent-to-GPA table. Returns the cut-offs, the named sources and the date they were checked. Use it instead of answering from memory; there is no national scale and schools differ.
| Name | Type | Req | Description |
|---|---|---|---|
| scale | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| checked | string | yes | – |
| link | string | yes | Page of calculatorforgrading.com with the same inputs filled in. |
| note | string | yes | – |
| rows | array | yes | – |
| scale | string | yes | – |
| sources | array | yes | – |
| title | string | yes | – |
No examples provided.
test_score_calculator SAT, ACT and MCAT practice scores ~277
Use this when a student wants a score from a published practice test: SAT (College Board digital practice tests 4-11, correct answers per section to score ranges), ACT (practice tests 1-4 and the National test, correct answers per section to scale scores and Composite) or MCAT (four section scores 118-132 to total and AAMC percentile). Returns the score with the source table and fetch date. Not for official score reports, other tests, or predicting a real exam.
| Name | Type | Req | Description |
|---|---|---|---|
| act_english_correct | integer | – | – |
| act_math_correct | integer | – | – |
| act_reading_correct | integer | – | – |
| act_science_correct | integer | – | – |
| mcat_bio_biochem | integer | – | – |
| mcat_cars | integer | – | – |
| mcat_chem_phys | integer | – | – |
| mcat_psych_soc | integer | – | – |
| practice_test | integer|string | – | SAT: practice test number 4-11. ACT: 1, 2, 3, 4 or national. |
| sat_math_correct | integer | – | SAT: correct answers in Math (both modules). |
| sat_reading_writing_correct | integer | – | SAT: correct answers in Reading and Writing (both modules). |
| test | string | yes | – |
| Name | Type | Req | Description |
|---|---|---|---|
| caveat | string | yes | – |
| composite | number|null | – | – |
| link | string | yes | Page of calculatorforgrading.com with the same inputs filled in. |
| percentile_valid | string | – | – |
| practice_test | string | – | – |
| sections | object | yes | Per-section result; keys depend on the test. |
| source | object | yes | – |
| test | string | yes | – |
| total | number|null | – | – |
| total_high | integer | – | – |
| total_low | integer | – | – |
| total_percentile | string|null | – | – |
No examples provided.
weighted_grade Weighted average of categories ~152
Use this when a student wants the weighted course grade from categories such as homework 20%, tests 50%, final 30%. Each row has a score (percent, a fraction like 45/50, or a letter) and a weight; rows without a score count as still open. Returns the weighted average, the letter, how much weight is graded and open, and optionally what the open part must average to reach a target grade. Do not use it for a single final-exam question without categories.
| Name | Type | Req | Description |
|---|---|---|---|
| rows | array | yes | – |
| scale | string | – | 10_point (default) or plus_minus. |
| target_grade | string|number | – | Optional wanted course grade (percent or letter). |
| Name | Type | Req | Description |
|---|---|---|---|
| graded_weight_percent | number | yes | – |
| letter | string | yes | – |
| link | string | yes | Page of calculatorforgrading.com with the same inputs filled in. |
| needed_on_remaining_percent | number|null | – | – |
| note | string | yes | – |
| open_weight_percent | number | yes | – |
| scale | string | yes | – |
| target_percent | number | – | – |
| verdict | string | – | – |
| weighted_average_percent | number | yes | – |
No examples provided.
How do I install the Calculator for Grading MCP server?
Calculator for Grading is a hosted endpoint at https://calculatorforgrading.com/mcp?src=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 · calculatorforgrading.com
claude mcp add --transport http com-calculatorforgrading-calculatorforgrading 'https://calculatorforgrading.com/mcp?src=mcp'
What is the Calculator for Grading MCP server?
Calculator for Grading is an MCP server listed in the public MCP registry as com.calculatorforgrading/calculatorforgrading. Grades from questions wrong, final exam score needed, weighted grades, GPA, SAT/ACT/MCAT scores. This page covers its hosted endpoint (https://calculatorforgrading.com/mcp?src=mcp).
Is the Calculator for Grading MCP server safe to use?
Calculator for Grading scores 73 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 Calculator for Grading MCP server expose?
Calculator for Grading exposes 6 tools: grade_calculator, final_grade_needed, weighted_grade, gpa_calculator, test_score_calculator, grading_scale_facts. Their descriptions and schemas cost roughly 1,311 tokens of context every time the server is loaded.
Does the Calculator for Grading MCP server require authentication?
No. We connected to Calculator for Grading without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Calculator for Grading MCP server still maintained?
Calculator for Grading is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.