Zovo GPA Calc
REMOTE · GPA-CALCULATOR.ZOVO.ONE
A GPA calculator for high school and college students that shows its work.
Available components
Last scanned (4 hours ago)
Scores higher than 64% of remote servers
Reachable. Last reached 23 Oct 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 Security80
- 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
- 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 Usability72
- 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).Pass
- AI-judged instruction clarity (good).Pass
- Context-footprint check failed: tool/resource definitions use about 1225 tokens (~306/item across 4 items; 3 tools + 1 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 Management3
- Stability observed for 1 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
- 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 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 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
- Supports UI / widget rendering.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.
- 23 Oct 26 0
- Stability: unverified → 0.03 ▲ functional
- 22 Oct 26 73
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 23 Oct 2026 · Probed https://gpa-calculator.zovo.one/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=zovo.one | CN=WE1,O=Google Trust Services,C=US | 2 Oct 2026 | 31 Dec 2026 | ECDSA 256 | ECDSA-SHA256 | 2d3119b989e67aa91312bdffb8fd18e3 |
| SANs: zovo.one, gpa-calculator.zovo.one, *.gpa-calculator.zovo.one | ||||||
| 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 gpa-calculator.zovo.one. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| one. | present | 64939 | 8 | Verified |
| zovo.one. | 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=15552000; includeSubDomains; preload |
| 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://gpa-calculator.zovo.one/mcp | Verified | 200 | |
| http (plaintext) | http://gpa-calculator.zovo.one/mcp | HTTPS enforced | 301 | https://gpa-calculator.zovo.one/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 →
calculate_gpa Calculate GPA ~539
Use this when the user wants to calculate their GPA (gpa calculator, gpa calculator college, gpa calculator high school, weighted gpa calculator, gpa calculator cumulative, gpa calculator with current gpa, gpa calculator from percentage, how to calculate gpa with credit hours or letter grades). Takes courses with letter grades (A+ to F), percentages, or P/NP/W, plus credits and level (regular, honors, AP, IB, dual enrollment). Returns exact unweighted and weighted GPA (2 and 3 decimals), cumulative GPA when previous GPA and credits are given, a quality points table, grade distribution, and the single course whose one-letter improvement raises the GPA most. Standard 4.0 scale by default; A+ value, weights, percent cutoffs, and letter points are adjustable because schools differ. Does not read transcripts, convert between countries' grading systems, or predict admissions.
| Name | Type | Req | Description |
|---|---|---|---|
| a_plus_points | number | – | Grade points for an A+: 4.0 (default, standard 4.0 scale) or 4.3 if the school awards 4.3. |
| courses | array | yes | The courses for this term, e.g. [{"name":"Biology","grade":"A","credits":4},{"name":"Calculus","grade":"B+","credits":3}]. |
| grade_points | object | – | Override points for specific letters if the school's scale differs, e.g. {"A-":3.67,"B+":3.33}. |
| percent_cutoffs | object | – | Minimum percent for each passing letter, used to convert percentage grades, e.g. {"A":90,"B":80,"C":70,"D":60}. Below the lowest cutoff is F. Default: A+ 97, A 93, A- 90, B+ 87, B 83, B- 80, C+ 77, C… |
| previous_credits | number | – | Credit hours behind previous_gpa, e.g. 45. |
| previous_gpa | number | – | Cumulative GPA already on the transcript, for a cumulative result, e.g. 3.2. |
| previous_gpa_type | string | – | Whether previous_gpa is unweighted (default) or weighted; the cumulative GPA uses the same basis. |
| weights | object | – | Weighted-GPA bonus points by course level, e.g. {"honors":0.5,"ap":1}. Omit for the common defaults. |
| Name | Type | Req | Description |
|---|---|---|---|
| courses | array | yes | – |
| cumulative | – | yes | – |
| distribution | array | yes | – |
| scale | string | yes | – |
| semester | object | yes | – |
| settings | object | yes | – |
| summary | string | yes | – |
| what_if | – | yes | – |
No examples provided.
final_grade_needed Final exam grade needed ~288
Use this when the user asks what score they need on a final exam to get a course grade ("I have an 85 and the final is 20%, what do I need for a 90"). Takes the current course grade %, the final exam weight %, and the desired course grade %; returns the score needed on the final, flags when it is impossible (above 100%, or above the max with extra credit) or already secured (any score works), the highest and lowest possible course grades, and the score needed for an A, B, C, or D (90/80/70/60). Assumes the current grade covers the rest of the course weight. Does not calculate GPA (use calculate_gpa) and does not handle point-based gradebooks with unknown category weights.
| Name | Type | Req | Description |
|---|---|---|---|
| current_grade_pct | number | yes | Current course grade before the final, as a percent, e.g. 85. |
| final_weight_pct | number | yes | How much the final exam counts toward the course grade, as a percent greater than 0, e.g. 20. |
| max_final_score_pct | number | – | Highest possible score on the final, default 100. Raise it only if the final has extra credit, e.g. 105. |
| target_grade_pct | number | yes | Course grade wanted after the final, as a percent, e.g. 90. |
| Name | Type | Req | Description |
|---|---|---|---|
| best_possible_grade_pct | number | yes | – |
| current_grade_pct | number | yes | – |
| final_weight_pct | number | yes | – |
| grade_if_zero_pct | number | yes | – |
| letter_targets | array | yes | – |
| max_final_score_pct | number | yes | – |
| needed_score_exact | number | yes | – |
| needed_score_pct | number | yes | – |
| possible | boolean | yes | – |
| status | string | yes | – |
| summary | string | yes | – |
| target_grade_pct | number | yes | – |
No examples provided.
plan_target_gpa Plan target GPA ~301
Use this when the user asks what GPA they need next semester or term to reach a target cumulative GPA (e.g. "what GPA do I need to raise my 3.2 to a 3.5", gpa calculator with current gpa). Takes current GPA, credits completed, target GPA, and upcoming credits; returns the exact GPA required on the upcoming credits, whether that is possible on the scale (and clearly says when it is impossible because it exceeds the maximum), the highest cumulative GPA reachable this term, the credits a target would take at straight A's, and the requirement for longer horizons. Does not calculate a GPA from individual grades (use calculate_gpa) and does not judge admissions chances.
| Name | Type | Req | Description |
|---|---|---|---|
| credits_completed | number | yes | Credit hours already counted in current_gpa, e.g. 60. Use 0 for a first term. |
| current_gpa | number | yes | Current cumulative GPA, e.g. 3.2. |
| max_gpa | number | – | Top of the scale, default 4.0. Use 4.3 if A+ = 4.3, or 5.0 for a weighted high school scale. |
| target_gpa | number | yes | Cumulative GPA the student wants to reach, e.g. 3.5. |
| upcoming_credits | number | yes | Credit hours in the upcoming term(s), greater than 0, e.g. 15. |
| Name | Type | Req | Description |
|---|---|---|---|
| credits_completed | number | yes | – |
| credits_needed_at_max | number|null | yes | – |
| current_gpa | number | yes | – |
| letter_equivalent | string|null | yes | – |
| max_achievable_gpa | number | yes | – |
| max_gpa | number | yes | – |
| min_achievable_gpa | number | yes | – |
| possible | boolean | yes | – |
| required_gpa | number | yes | – |
| required_gpa_exact | number | yes | – |
| scenarios | array | yes | – |
| status | string | yes | – |
| summary | string | yes | – |
| target_gpa | number | yes | – |
| upcoming_credits | number | yes | – |
No examples provided.
How do I install the Zovo GPA Calc MCP server?
Zovo GPA Calc is a hosted endpoint at https://gpa-calculator.zovo.one/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 · gpa-calculator.zovo.one
claude mcp add --transport http theluckystrike-gpa-calculator 'https://gpa-calculator.zovo.one/mcp'
What is the Zovo GPA Calc MCP server?
Zovo GPA Calc is an MCP server listed in the public MCP registry as io.github.theluckystrike/gpa-calculator. A GPA calculator for high school and college students that shows its work. This page covers its hosted endpoint (https://gpa-calculator.zovo.one/mcp).
Is the Zovo GPA Calc MCP server safe to use?
Zovo GPA Calc 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 Zovo GPA Calc MCP server expose?
Zovo GPA Calc exposes 3 tools: calculate_gpa, plan_target_gpa, final_grade_needed. Their descriptions and schemas cost roughly 1,128 tokens of context every time the server is loaded.
Does the Zovo GPA Calc MCP server require authentication?
No. We connected to Zovo GPA Calc without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Zovo GPA Calc MCP server still maintained?
Zovo GPA Calc is still listed as active in the MCP registry. We last reached this channel on 23 October 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.