# com.logiccommons/calculators

> Find and run trustworthy calculators with clear methods, provenance, and sources.

- name: com.logiccommons/calculators
- version: 1.0.0-beta.2
- connection class: R0 (autonomous)
- trust: 80/100 flags: no-repository
- quality: 80/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/com.logiccommons%2Fcalculators
- tools: https://api.protogrid.dev/v1/servers/com.logiccommons%2Fcalculators/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

```json
{
  "mcpServers": {
    "calculators": {
      "type": "http",
      "url": "https://mcp.logiccommons.com/mcp"
    }
  }
}
```


## Trust

- hygiene: 80
- liveness: 100
- freshness: 85
- provenance: 55
- drivers: +dns-namespace +website +reachable +uptime-100% ~updated-36d-ago -no-repository
- Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed.

## Quality 80/100 (good)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 64 (weight 30)

- pass `tools.descriptions`: every tool has a description
- warn `tools.description_length`: 1 tools have descriptions over 1,024 characters, which crowds the context
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: search_calculators (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); run_calculator (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); get_calculator_schema (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
- pass `tools.token_cost`: about 919 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: 1 tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: n/a (weight 15)

- n/a `deps.known_vulns`, `deps.mcp_sdk_version`, `deps.resolvable`: no npm or PyPI package

- tools: 3, about 919 tokens to load them all
- tool set hash: c3dc4774875dd30dac3e2269e2646152
- tools last changed: 2026-10-15T21:23:20.714Z
- badge: [![protogrid quality](https://protogrid.dev/badge/com.logiccommons/calculators.svg)](https://protogrid.dev/servers/com.logiccommons/calculators)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

- 2026-10-15 `run_calculator` changed (description)
  - before: Run a calculator with the given inputs. Inputs are validated against the resolved version's reviewed contract and computed by SpreadsheetWeb through the same proxy as the web channel. An optional platform_version pins both validation and computation to that immutable version. Returns outputs keyed by named range (including the status output) and trust metadata with a citation URL, resolvedInputs, and warnings for omitted inputs. Missing or blank visible required inputs are refused before computation; inspect get_calculator_schema and the complete error detail. For schema 0.18, optional omissions are sent explicitly as declared blank or standing default and disclosed with their values and sources. Older pinned contracts require all inputs during migration. Visibility follows version-bound dropdown truth tables; a missing controller makes its dependents indeterminate until it is supplied. A hidden controller is ignored only when all of its option branches have the same remaining visibility subtree; otherwise its dependents stay hidden. Hidden omissions use explicit blank/default values; supplied hidden inputs are retained with a not-applicable warning. Always read Model_Status and status outputs; CHECK and STOP are load-bearing verdicts about the result's validity. Results are informational and not professional advice; the applicable notice is returned in the trust block.
  - after: Run a calculator with the given inputs. Inputs are validated against the resolved version's reviewed contract and computed by SpreadsheetWeb through the same proxy as the web channel. An optional platform_version pins both validation and computation to that immutable version. Returns outputs keyed by named range (including the status output) and trust metadata with a citation URL, resolvedInputs, and warnings for omitted inputs. Missing or blank visible required inputs are refused before computation; inspect get_calculator_schema and the complete error detail. For schema 0.18, optional omissions are sent explicitly as declared blank or standing default and disclosed with their values and sources. Older pinned contracts require all inputs during migration. Visibility follows version-bound truth tables over dropdown options, or over blank/set for a clearable optional input (omitted, null or whitespace is blank; 0 is set); a missing required controller makes its dependents indeterminate until it is supplied. A hidden controller is ignored only when all of its option branches have the same remaining visibility subtree; otherwise its dependents stay hidden. Hidden omissions use explicit blank/default values; supplied hidden inputs are retained with a not-applicable warning. Always read Model_Status and status outputs; CHECK and STOP are load-bearing verdicts about the result's validity. Results are informational and not professional advice; the applicable notice is returned in the trust block.

Full history: https://api.protogrid.dev/v1/servers/com.logiccommons%2Fcalculators/changes

## Remotes

- https://mcp.logiccommons.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

_none_

## Tools (3)

- `get_calculator_schema`: Get the input and output schema for a calculator, generated from its reviewed contract: parameter types, units, allowed dropdown values and definitional bounds, plus outputs keyed by named range (including the status output). Table inputs carry a 'grid' block giving the exact number of rows to send, the column layout, which columns are editable, and how to shape a row; a table whose 'grid' block says writable=false cannot be supplied at all. Schema 0.18 exposes required and omitted declarations plus version-bound visibility tables; older versions require every input while awaiting metadata migration. Optionally resolves one immutable platform version. Returns trust metadata for the resolved version.
- `run_calculator`: Run a calculator with the given inputs. Inputs are validated against the resolved version's reviewed contract and computed by SpreadsheetWeb through the same proxy as the web channel. An optional platform_version pins both validation and computation to that immutable version. Returns outputs keyed by named range (including the status output) and trust metadata with a citation URL, resolvedInputs, and warnings for omitted inputs. Missing or blank visible required inputs are refused before computation; inspect get_calculator_schema and the complete error detail. For schema 0.18, optional omissions are sent explicitly as declared blank or standing default and disclosed with their values and sources. Older pinned contracts require all inputs during migration. Visibility follows version-bound truth tables over dropdown options, or over blank/set for a clearable optional input (omitted, null or whitespace is blank; 0 is set); a missing required controller makes its dependents indeterminate until it is supplied. A hidden controller is ignored only when all of its option branches have the same remaining visibility subtree; otherwise its dependents stay hidden. Hidden omissions use explicit blank/default values; supplied hidden inputs are retained with a not-applicable warning. Always read Model_Status and status outputs; CHECK and STOP are load-bearing verdicts about the result's validity. Results are informational and not professional advice; the applicable notice is returned in the trust block.
- `search_calculators`: Search the LogicCommons calculator catalog by keyword and optional category. Returns matching published calculators with slug, name, summary, category, a citation URL, and trust metadata.