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Crontab Generator API

Official registry Other

Natural language to cron expression converter. x402 micropayment.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (sse)
Claude Code 
claude mcp add --transport sse crontab-generator-api 'https://crontab-generator.api.klymax402.com/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "crontab-generator-api": {
            "type": "sse",
            "url": "https://crontab-generator.api.klymax402.com/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Crontab Generator API
  2. Quickstart -- MCP
  3. Quickstart -- HTTP (x402)
  4. Tools
  5. Example agent prompts
  6. Payment
  7. Part of klymax402
  8. License

Crontab Generator API

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.):

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

Quickstart -- HTTP (x402)

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:

{"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

Frequently asked questions

What is Crontab Generator API?

Natural language to cron expression converter. x402 micropayment.

How do I install Crontab Generator API?

It runs as a remote server. In Claude Code: claude mcp add --transport sse crontab-generator-api 'https://crontab-generator.api.klymax402.com/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Crontab Generator API need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is Crontab Generator API open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains Crontab Generator API?

It is published by Br0ski777. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.