com.usephysics/physics-calculators
REMOTE · USEPHYSICS.COM
Physics calculators that show their work, plus the CODATA 2022 constants. Educational use.
Available components
Last scanned (6 hours ago)
Scores higher than 62% 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 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. Nothing on it is marked destructive, but we can't show that an anonymous caller can only read: full credit needs the server to list at least one tool and every tool to be verifiably read-only. We use a best-effort check of tool names and descriptions to tell read-only tools from tools that change things, so some genuinely read-only tools may not get full credit. Names that start with a read verb (get, list, read, search and similar) and accurate readOnlyHint annotations help. Meet that to earn full credit, or require authorisation. 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 Usability75
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 441 tokens (~110/item across 4 items; 4 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management7
- Stability observed for 2 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 Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 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
Checks we ran (13)
- TLS certificate
- Authorization
- HTTPS
- HSTS header
- DNSSEC
- Transport
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
Does not apply to this hosted endpoint (2)
- Supply Chain SecurityScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
- Provenance & TransparencyScored on package channels only. This is a hosted endpoint, so there is nothing to install or inspect.
The score does not measure everything. What the score does not measure →
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 0
- Stability: unverified → 0.03 ▲ functional
- 3 Nov 26 74
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://usephysics.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usephysics.com | CN=YR1,O=Let's Encrypt,C=US | 8 Sept 2026 | 7 Dec 2026 | RSA 2048 | SHA256-RSA | 5e39d6fe5c2efbedfbd87650b77af6a61a6 |
| SANs: usephysics.com | ||||||
| CN=YR1,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | a20253f15f2691c05dc1ce13b9bcca4e |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of usephysics.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | Trust anchor | 20326, 38696 | 8, 8 | Verified |
| com. | DS published | 19718 | 13 | Verified |
| usephysics.com. | No DS | 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=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://usephysics.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://usephysics.com/api/mcp | HTTPS enforced | 308 | https://usephysics.com/api/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 Run a calculator ~112
Run one calculator by id with numeric inputs (keys from list_calculators, in the listed units). Returns every result with its unit, the formula, the Given → Formula → Substitute → Result working when the engine can derive it, and the URL of the solved page.
| Name | Type | Req | Description |
|---|---|---|---|
| calculator_id | string | yes | The calculator id (slug) from list_calculators, e.g. kinetic-energy |
| inputs | object | yes | Input values keyed by input key, in the listed units; a missing key takes the default |
No output schema declared.
No examples provided.
get_constant Look up a physical constant ~99
One CODATA 2022 constant by id, symbol or name (e.g. 'c', 'speed of light', 'planck-constant'): value as NIST prints it, machine-readable value, standard uncertainty (null = exact), unit, note, page and NIST source.
| Name | Type | Req | Description |
|---|---|---|---|
| query | string | yes | id, symbol or name, e.g. 'c', 'speed-of-light-in-vacuum', 'Planck constant' |
No output schema declared.
No examples provided.
list_calculators List the calculators ~61
Every UsePhysics calculator: id (slug), name, category, formula, inputs (key, unit, default) and page URL. Optional category filter.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | e.g. Mechanics, Energy, Electricity & Waves, Everyday Life |
No output schema declared.
No examples provided.
list_constants List the physical constants ~55
The CODATA 2022 constants UsePhysics keeps, grouped; optional group id filter. Values are NIST's.
| Name | Type | Req | Description |
|---|---|---|---|
| group | string | – | A group id from a previous answer, e.g. si-defining-constants |
No output schema declared.
No examples provided.
How do I install the com.usephysics/physics-calculators MCP server?
com.usephysics/physics-calculators is a hosted endpoint at https://usephysics.com/api/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 · usephysics.com
claude mcp add --transport http com-usephysics-physics-calculators 'https://usephysics.com/api/mcp'
What is the com.usephysics/physics-calculators MCP server?
com.usephysics/physics-calculators is an MCP server listed in the public MCP registry as com.usephysics/physics-calculators. Physics calculators that show their work, plus the CODATA 2022 constants. Educational use. This page covers its hosted endpoint (https://usephysics.com/api/mcp).
Is the com.usephysics/physics-calculators MCP server safe to use?
com.usephysics/physics-calculators scores 74 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 com.usephysics/physics-calculators MCP server expose?
com.usephysics/physics-calculators exposes 4 tools: list_calculators, calculate, get_constant, list_constants. Their descriptions and schemas cost roughly 327 tokens of context every time the server is loaded.
Does the com.usephysics/physics-calculators MCP server require authentication?
No. We connected to com.usephysics/physics-calculators without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the com.usephysics/physics-calculators MCP server still maintained?
com.usephysics/physics-calculators 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.
What did VerifyMCP test on the com.usephysics/physics-calculators MCP server?
VerifyMCP ran 13 checks on com.usephysics/physics-calculators, covering TLS certificate, Authorization, HTTPS, HSTS header and 9 more. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.