com.mcpcalc/calculator

REMOTE · MCPCALC.COM · SCANNED AUG 3

Calculators accessible via MCP with real-time collaborative sessions and shareable URLs.

Available components

+3 this week 62 62 Trust /100

Trust breakdown (6 categories)

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 →

Endpoint Security57

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 10 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
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 Usability66

AI-judged instruction clarity (good).Pass
Tool/resource definitions use about 532 tokens (~53/item across 10 items; 10 tools + 0 resources), lean.Pass
Usage-examples check failed: none of the tools include examples. See how to fix → Fail

Stability & Change Management27

Stability observed for 8 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

Capabilities40

Spec-recency check failed: implements MCP spec 2025-03-26; the latest is 2026-07-28. See how to fix → Fail

Install

Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.

remote · mcpcalc.com

Claude Codex opencode OpenClaw Hermes Other

# add to Claude Code

claude mcp add --transport http com-mcpcalc-calculator https://mcpcalc.com/api/v1/mcp

# ~/.codex/config.toml

[mcp_servers.com-mcpcalc-calculator]
url = "https://mcpcalc.com/api/v1/mcp"

// opencode.json

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-mcpcalc-calculator": {
      "type": "remote",
      "url": "https://mcpcalc.com/api/v1/mcp",
      "enabled": true
    }
  }
}

# add to OpenClaw

openclaw mcp add com-mcpcalc-calculator --url https://mcpcalc.com/api/v1/mcp --transport streamable-http

# ~/.hermes/config.yaml

mcp_servers:
  com-mcpcalc-calculator:
    url: "https://mcpcalc.com/api/v1/mcp"

// mcp.json

{
  "mcpServers": {
    "com-mcpcalc-calculator": {
      "type": "http",
      "url": "https://mcpcalc.com/api/v1/mcp"
    }
  }
}

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

Changelog

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.

3 Aug 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.
31 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
30 Jul 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.
28 Jul 26 +1

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
27 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
26 Jul 26 58

First indexed and scored.

Show 5 earlier entries Hide earlier entries

Diagnostics

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 3 Aug 2026 · Probed https://mcpcalc.com/api/v1/mcp

TLS valid

Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .

Subject	Issuer	Valid from	Valid until	Key	Signature	Serial
CN=mcpcalc.com	CN=WE1,O=Google Trust Services,C=US	6 Jun 2026	4 Sept 2026	ECDSA 256	ECDSA-SHA256	4d4cc22d934a8d9013dd13e0b92d342d
SANs: mcpcalc.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

DNSSEC insecure

Validation of mcpcalc.com. — Not signed

Zone	DS	Keys	Algorithms	Outcome
.	trust_anchor	20326, 38696	8, 8	Verified
com.	present	19718	13	Verified
mcpcalc.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

Transports 2 probes

Transport	URL	Outcome	Status	Location
streamable-http	https://mcpcalc.com/api/v1/mcp	Verified	200
http (plaintext)	http://mcpcalc.com/api/v1/mcp	HTTPS enforced	301	https://mcpcalc.com/api/v1/mcp

MCP tools — 10 exposed · ~532 tokens

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.

Tool Tokens

calculate ~57

Run a calculation and get results + prefilled URL

Input Output Examples

Name	Type	Req	Description
calculator	string	yes	Calculator slug
inputs	object	yes	Calculator input values
strict	boolean	—	If true, reject invalid or unknown input fields instead of dropping them

No output schema declared.

No examples provided.

calculate_cas ~92

Evaluate one or more headless CAS expressions server-side (MCP-only numeric mode). Unsupported expressions return a GUI handoff link.

Input Output Examples

Name	Type	Req	Description
expression	string	—	Single CAS expression to evaluate
expressions	array	—	Optional ordered list of CAS expressions to evaluate in one isolated context (supports assignments across the batch)
strict	boolean	—	If true, reject unknown fields and malformed expressions instead of dropping them

No output schema declared.

No examples provided.

calculate_cas_headless ~93

Alias of calculate_cas. Headless MCP-only CAS evaluator; if unsupported features are requested, returns GUI handoff details.

Input Output Examples

Name	Type	Req	Description
expression	string	—	Single CAS expression to evaluate
expressions	array	—	Optional ordered list of CAS expressions to evaluate in one isolated context (supports assignments across the batch)
strict	boolean	—	If true, reject unknown fields and malformed expressions instead of dropping them

No output schema declared.

No examples provided.

close_session ~31

Close a session and optionally persist a snapshot of its final state

Input Output Examples

Name	Type	Req	Description
session_id	string	yes	Session UUID

No output schema declared.

No examples provided.

create_session ~41

Create a new interactive session for any calculator and return the session URL

Input Output Examples

Name	Type	Req	Description
calculator	string	yes	Calculator slug
metadata	object	—	Optional session metadata

No output schema declared.

No examples provided.

generate_prefilled_url ~59

Generate a prefilled URL without running calculation

Input Output Examples

Name	Type	Req	Description
calculator	string	yes	Calculator slug
inputs	object	yes	Input values for URL
strict	boolean	—	If true, reject invalid or unknown input fields instead of dropping them

No output schema declared.

No examples provided.

get_calculator_schema ~28

Get the input schema for a specific calculator

Input Output Examples

Name	Type	Req	Description
calculator	string	yes	Calculator slug

No output schema declared.

No examples provided.

get_session_state ~37

Retrieve the current field values, computation transcript, and pending message queue for an active session

Input Output Examples

Name	Type	Req	Description
session_id	string	yes	Session UUID

No output schema declared.

No examples provided.

list_calculators ~38

List available calculators, optionally filtered by category

Input Output Examples

Name	Type	Req	Description
category	string	—	Filter by category (e.g., 'finance', 'math')

No output schema declared.

No examples provided.

push_session_action ~56

Push actions into a session's message queue (set fields, submit computation, trigger plot, etc.)

Input Output Examples

Name	Type	Req	Description
actions	array	yes	Array of SessionAction objects to push to the browser
session_id	string	yes	Session UUID

No output schema declared.

No examples provided.

On this page

Handy links

Scoring key

80+ high trust
60–79 medium
below 60 low

How we score

Score history · last 30 days

26 Jul 3 Aug

Day	Score
26 Jul	58
27 Jul	59
28 Jul	60
29 Jul	60
30 Jul	61
31 Jul	61
1 Aug	61
2 Aug	61
3 Aug	62