Crontab Generator API

io.github.Br0ski777Published by GitHub account Br0ski777v1.1.0Updated Oct 24, 2026

Natural language to cron expression converter. x402 micropayment.

VerifiedSSEWeb executableProductivity & WorkflowDeveloper Tools

Overview

AI-generated overview

Remote MCP endpoint that turns a plain-English schedule description into a cron expression, with explanation and next run times, paid per call.

What you can do
  • Generate a cron expression from a natural-language schedule description such as "every Monday at 9am" or "every 5 minutes".
  • Get back the expression with validation, a readable description, upcoming run times and a confidence value.
When to use it
Useful when an assistant has to create scheduled tasks or crontab entries from a user's plain-English instructions and you would rather not write cron syntax by hand. It is a single-purpose converter, not a parser for existing expressions.
Requirements
A remote MCP endpoint added by URL; no API key, signup or environment variables are declared. Each call is paid through the x402 protocol in USDC on Base L2, so an x402-capable client with a funded wallet is needed to complete the payment challenge.
Before you install
Every call costs money (listed at $0.003 per generation) and is settled in USDC on Base through a wallet, so spending limits matter. Payment goes through third-party facilitators, and the service is part of a larger paid API marketplace. The schedule descriptions you send are processed by an external server.

Installation

In SourceWeft

  1. Open Crontab Generator API in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via SSE. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.Br0ski777%2Fcrontab-generator/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "crontab-generator-api": {
      "type": "sse",
      "url": "https://crontab-generator.api.klymax402.com/mcp"
    }
  }
}

README

Crontab Generator API

[MCP Server] [x402] [License: MIT]

Convert natural language like 'every Monday at 9am' into valid cron expressions with explanation and next run times. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

json
{  "mcpServers": {    "crontab-generator": {      "url": "https://crontab-generator.api.klymax402.com/mcp"    }  }}

Quickstart -- HTTP (x402)

bash
curl -X POST "https://crontab-generator.api.klymax402.com/api/generate" \  -H "Content-Type: application/json" \  -d '{"description":"..."}'# -> 402 Payment Required, with an x402 payment challenge in the response body

Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.

Tools

ToolMethodPathPriceDescription
utility_generate_crontabPOST/api/generate$0.003Generate a cron expression from natural language

utility_generate_crontab

Use this when you need to generate a cron expression from a natural language description like "every Monday at 9am" or "every 5 minutes". Returns the cron expression with validation.

Parameters

NameTypeRequiredDescription
descriptionstringyesNatural language description of the schedule (e.g. 'every Monday at 9am', 'twice a day', 'every 5 minutes')

Example response:

json
{"expression":"0 9 * * 1","description":"Every Monday at 9:00 AM","nextRuns":["2026-04-14T09:00:00Z","2026-04-21T09:00:00Z"],"confidence":"high"}

When to use: creating new scheduled tasks from user instructions, building crontab configs from plain English, or translating business requirements into cron syntax. Use this BEFORE writing cron entries manually.

Not for: parsing existing cron expressions (use schedule_parse_cron), JSON validation (use data_validate_json), text analysis (use text_count_words).

Example agent prompts

  • "Generate a cron expression from a natural language description like "every Monday at 9am" or "every 5 minutes""

Payment

  • Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
  • Network: Base L2 (eip155:8453)
  • Asset: USDC
  • Facilitator: Coinbase CDP (primary), PayAI (fallback)
  • Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)

Part of klymax402

100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.

License

MIT

Source: README.md at commit 01f7d05

Tools

0
SourceWeft has not read this server's tools yet.

Version history

1
  1. v1.1.0LatestSep 16, 2026

Score

50% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts

    Keep the endpoint answering the MCP handshake; SourceWeft probes it every 30 days.

  • Auth declaredRequired10 pts

    Declare the credential headers in the registry entry, or keep the endpoint answering the probe so its auth can be classified.

  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts