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Cron Translator

R0· no sign-in

Explain cron expressions in English, list next run times, and catch scheduling gotchas.

v0.1.0 · active · repository · website · descriptor JSON · versions

An agent can connect right now, no human step.Remote endpoint, no authentication, reachable on the last probe.
Quality89good
Trust89of 100
Uptime, 30 days100%
Latency p50822 ms

Connect

8 clients · secrets stay placeholders
{
  "mcpServers": {
    "cron-translator": {
      "type": "http",
      "url": "https://crontoenglish.com/api/mcp"
    }
  }
}
claude mcp add --transport http cron-translator https://crontoenglish.com/api/mcp
[mcp_servers.cron-translator]
url = "https://crontoenglish.com/api/mcp"
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "cron-translator": {
      "type": "remote",
      "url": "https://crontoenglish.com/api/mcp",
      "enabled": true
    }
  }
}
{
  "mcpServers": {
    "cron-translator": {
      "type": "http",
      "url": "https://crontoenglish.com/api/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=cron-translator&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vY3JvbnRvZW5nbGlzaC5jb20vYXBpL21jcCJ9"
}
{
  "servers": {
    "cron-translator": {
      "type": "http",
      "url": "https://crontoenglish.com/api/mcp"
    }
  }
}
{
  "mcpServers": {
    "cron-translator": {
      "httpUrl": "https://crontoenglish.com/api/mcp"
    }
  }
}
extensions:
  "cron-translator":
    enabled: true
    name: "cron-translator"
    type: streamable_http
    uri: "https://crontoenglish.com/api/mcp"
    timeout: 300

Quality 89 / 100good

protocol88 · weight 25
  • pass
    protocol.modernsupports 2026-07-28 (server/discover)
  • pass
    protocol.statelessanswers without a session
  • pass
    protocol.transportstreamable HTTP
  • warn
    protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use
authorizationn/a · weight 15
  • n/a
    auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
  • n/a
    auth.secret_in_urlno templated URL
tool hygiene86 · weight 30
  • pass
    tools.descriptionsevery tool has a description
  • pass
    tools.description_lengthdescriptions are concise
  • pass
    tools.schemasevery tool has an object input schema
  • pass
    tools.annotations3 of 3 tools declare readOnlyHint or destructiveHint
  • fail
    tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: next_cron_runs (destructiveHint, idempotentHint); explain_cron (destructiveHint, idempotentHint); build_cron (destructiveHint, idempotentHint)
  • pass
    tools.token_costabout 1,210 tokens to load every tool
  • pass
    tools.api_dumptools are not a one-to-one API dump
stability100 · weight 15
  • pass
    stability.changesno tool changes in 30 days
  • pass
    stability.rug_pullno tool changed its meaning under the same name
dependenciesn/a · weight 15
  • n/a
    deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

3 tools, about 1,210 tokens to load them all · tool set 1168811cee13 · checked 2026-10-20 15:57 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 89 / 100

duplicate-repo
provenance85
liveness100
freshness85
hygiene80

+repository +dns-namespace +website +reachable +uptime-100% ~updated-48d-ago -duplicate-repo(16 names)

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remoteauthreachableuptime 30dp50protocollast ok
https://crontoenglish.com/api/mcp streamable-httpnoneyes100%822 ms2026-07-282026-10-20

Tools (3)

build_cronread-onlyConvert an English schedule description into a standard five-field cron expression, then explain and validate the result. Use this when a user describes a schedule in words and needs the expression. This is a RULE-BASED converter, not a language model: it handles a fixed grammar and returns an error listing the supported phrasings when a phrase falls outside it. That refusal is deliberate — a plausible-looking wrong schedule is worse than no answer. If a phrase is rejected, rephrase it into one of the supported shapes and call again. Returns the expression, which rule matched, any words the rules did not use (check these — leftover words may mean the phrase was misread), the English description of the result, warnings, and the next run times.
explain_cronread-onlyTranslate a cron expression into plain English, list its upcoming run times in a specific timezone, and report the gotchas that make schedules misfire. Use this whenever a cron expression needs to be read, verified, or explained — and prefer it over reasoning about the expression directly. Cron has several counter-intuitive rules that are easy to get wrong: day-of-month and day-of-week are combined with OR (not AND) when both are set, steps like */7 do not divide their field evenly, dates like February 30 never fire at all, and daylight-saving transitions skip or repeat runs. This tool checks all of them. Returns the normalised expression, a one-sentence description, a per-field breakdown, a list of warnings with severity and a fix for each, the next run times as both UTC ISO 8601 instants and local wall-clock strings, and an approximate runs-per-day figure.
next_cron_runsread-onlyList the next run times for a cron expression in a specific timezone, with no prose. Use this when the only question is "when does this next fire" — for example to check whether a job will run before a deadline, or to show a user their upcoming schedule. Do not compute these dates yourself: weekday arithmetic, month lengths, and daylight-saving shifts make manual calculation unreliable. Returns each run as a UTC ISO 8601 instant plus a local wall-clock rendering in the requested timezone. Refuses Quartz-only syntax (L, W, #, ?) rather than guessing.

Schemas: list_tools.

Also listed as

15 other active names share this repository (showing 10): com.gumballtools/amortize, com.gumballtools/body-metrics, com.gumballtools/check-digit, com.gumballtools/color-companion, com.gumballtools/due-date, com.gumballtools/equation-steps, com.gumballtools/iso-week, com.gumballtools/json-to-types, com.gumballtools/payload-validator, com.gumballtools/penny-rounding

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Official server.json
{
  "name": "com.crontoenglish/cron-translator",
  "title": "Cron Translator",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://crontoenglish.com/api/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.0",
  "repository": {
    "url": "https://github.com/bwalvoord/gumball",
    "source": "github"
  },
  "websiteUrl": "https://crontoenglish.com",
  "description": "Explain cron expressions in English, list next run times, and catch scheduling gotchas."
}