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
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
utility_generate_crontab | POST | /api/generate | $0.003 | Generate 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
| Name | Type | Required | Description |
|---|---|---|---|
description | string | yes | Natural 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.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT