Cron Parser API

Parse, validate, and explain cron expressions. Get next N run times in any timezone. 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.):

config.json

{
  "mcpServers": {
    "cron-parser": {
      "url": "https://cron-parser.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

Terminal

curl -X POST "https://cron-parser.api.klymax402.com/api/parse" \
  -H "Content-Type: application/json" \
  -d '{"expression":"..."}'
# -> 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
`schedule_parse_cron`	POST	`/api/parse`	$0.003	Parse a cron expression and get next run times

`schedule_parse_cron`

Use this when you need to parse, validate, or explain a cron expression. Returns human-readable description, next N execution times, and field breakdown. Supports standard 5-field cron and extended 6-field (with seconds). Do NOT use for scheduling tasks — use api_test_webhook instead. Do NOT use for JSON validation — use data_validate_json instead.

Parameters

Name	Type	Required	Description
`expression`	string	yes	Cron expression (e.g. '0 9 * * 1-5' or '/5 * * *')
`timezone`	string	no	IANA timezone (default: UTC, e.g. America/New_York)
`count`	number	no	Number of next run times to return (default: 5, max: 20)

Example agent prompts

"Parse, validate, or explain a cron expression"

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)

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