{"id":"49c15fe9-04d3-430e-95dd-67576c195ef2","shortId":"UVKc2e","kind":"x402","title":"Convert cron expressions to human-readable descriptions via a paid x402 API endpoint.","tagline":"Convert cron expressions to human-readable descriptions via a paid x402 API endpoint.","description":"AgentUtil Cron `/v1/explain` is one endpoint in a suite of cron-expression tools hosted at cron.agentutil.net. It accepts a standard 5-field cron expression (or special strings like `@daily`, `@hourly`) and returns a human-readable description along with a breakdown of each field (minute, hour, day_of_month, month, day_of_week).\n\nThe broader AgentUtil Cron service also offers three sibling endpoints: `/v1/parse` (natural-language to cron, regex/keyword-based with no LLM), `/v1/next` (calculate next N execution times with timezone support), and `/v1/validate` (validate and normalize expressions). All endpoints use POST with JSON bodies.\n\nPricing is documented in the OpenAPI spec's `x-pricing` extension: a free tier of 10 requests per day per IP with no signup, and paid access via the x402 protocol settling in USDC on Base at $0.001 per request. Note that during probing the endpoint returned HTTP 400 (not the expected 402 payment challenge), likely because the request body was empty/malformed rather than because the endpoint is down — the root domain returns 200 and serves a working landing page. The endpoint's liveness via x402 could not be fully confirmed.","tags":[],"capabilities":["cron-explain","cron-parse","cron-validate","cron-next-schedule","natural-language-to-cron","timezone-support","x402-payment","usdc-base-settlement"],"categories":["utilities","scheduling"],"synonyms":["cron expression explainer","cron to english","cron description","cron parser","cron schedule calculator","crontab helper","cron validator"],"warnings":["x402 payment challenge not confirmed: endpoint returned HTTP 400 on POST probe (likely due to missing request body), not the expected 402","No dedicated documentation, pricing, or API reference pages were found (all returned 404)","Free tier limit (10/day/IP) and paid pricing ($0.001/req) are sourced only from the OpenAPI x-pricing extension, not from a public pricing page"],"endpointUrl":"https://cron.agentutil.net/v1/explain","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","openapi":"https://cron.agentutil.net/openapi.json","version":"2","docs_url":"https://cron.agentutil.net/.well-known/agent-service.json","free_tier":"10 queries/day without payment","description":"Convert a cron expression to a human-readable description"},"payTo":"0x1357bef96ec515d250137d7eb712f0395eb5142d","amount":"1000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}]},"qualityScore":"0.550","qualityRationale":"Full OpenAPI schema with clear request/response definitions and documented pricing. However, the x402 challenge was not confirmed (endpoint returned 400 instead of 402), no dedicated docs or examples pages exist, and crawled pages beyond the root all returned 404. Liveness is plausible but not fully 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'/v1/next':103 '/v1/parse':93 '/v1/validate':113 '0.001':163 '10':141 '200':199 '400':174 '402':178 '5':50 'accept':47 'access':152 'agentutil':29,85 'along':67 'also':88 'api':13,27 'base':161 'bodi':124,185 'breakdown':70 'broader':84 'calcul':104 'challeng':180 'confirm':216 'convert':1,15 'could':212 'cron':2,16,30,40,52,86,98 'cron description' 'cron expression explainer' 'cron parser' 'cron schedule calculator' 'cron to english' 'cron validator' 'cron-explain' 'cron-express':39 'cron-next-schedule' 'cron-parse' 'cron-validate' 'cron.agentutil.net':45 'crontab helper' 'daili':58 'day':76,80,144 'descript':8,22,66 'document':127 'domain':197 'empty/malformed':187 'endpoint':14,28,34,92,119,171,192,207 'execut':107 'expect':177 'express':3,17,41,53,117 'extens':136 'field':51,73 'free':138 'fulli':215 'host':43 'hour':59,75 'http':173 'human':6,20,64 'human-read':5,19,63 'ip':146 'json':123 'land':204 'languag':96 'like':57,181 'live':209 'llm':102 'minut':74 'month':78,79 'n':106 'natur':95 'natural-languag':94 'natural-language-to-cron' 'next':105 'normal':116 'note':166 'offer':89 'one':33 'openapi':130 'page':205 'paid':11,25,151 'payment':179 'per':143,145,164 'post':121 'price':125,135 'probe':169 'protocol':156 'rather':188 'readabl':7,21,65 'regex/keyword-based':99 'request':142,165,184 'return':61,172,198 'root':196 'serv':201 'servic':87 'settl':157 'sibl':91 'signup':149 'spec':131 'special':55 'standard':49 'string':56 'suit':37 'support':111 'three':90 'tier':139 'time':108 'timezon':110 'timezone-support' 'tool':42 'usdc':159 'usdc-base-settlement' 'use':120 'valid':114 'via':9,23,153,210 'week':82 'work':203 'x':134 'x-price':133 'x402':12,26,155,211 'x402-payment'","prices":[{"id":"f3b44ca2-0dd4-4b61-adfc-ca50f72adde3","listingId":"49c15fe9-04d3-430e-95dd-67576c195ef2","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x1357bef96ec515d250137d7eb712f0395eb5142d","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","openapi":"https://cron.agentutil.net/openapi.json","version":"2","docs_url":"https://cron.agentutil.net/.well-known/agent-service.json","free_tier":"10 queries/day without payment","description":"Convert a cron expression to a human-readable description"},"payTo":"0x1357bef96ec515d250137d7eb712f0395eb5142d","amount":"1000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:37.814Z"}],"sources":[{"listingId":"49c15fe9-04d3-430e-95dd-67576c195ef2","source":"x402_bazaar","sourceId":"https://cron.agentutil.net/v1/explain","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:37.814Z","lastSeenAt":"2026-04-22T18:05:24.404Z"}],"details":{"listingId":"49c15fe9-04d3-430e-95dd-67576c195ef2","quickStartSnippet":"curl -X POST https://cron.agentutil.net/v1/explain \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"expression\": \"*/5 * * * *\"}'","exampleRequest":{"expression":"*/5 * * * *"},"exampleResponse":{"fields":{"hour":"*","month":"*","minute":"*/5","day_of_week":"*","day_of_month":"*"},"expression":"*/5 * * * *","description":"Every 5 minutes"},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The service offers four endpoints: explain, parse, next, and validate for cron expressions","source_url":"https://cron.agentutil.net"},{"claim":"Free tier allows 10 requests per day per IP; paid tier costs $0.001 per request in USDC on Base via x402","source_url":"https://cron.agentutil.net"},{"claim":"The /v1/parse endpoint uses regex/keyword matching, not an LLM","source_url":"https://cron.agentutil.net"},{"claim":"Landing page displays a working cron tool demo showing 'Every 5 minutes' for */5 * * * *","source_url":"https://cron.agentutil.net"}],"useCases":["Agents that need to explain cron schedules to users in plain English","Automated pipelines that validate cron expressions before deploying scheduled jobs","Converting natural-language scheduling requests into cron syntax","Calculating upcoming execution times for a given cron expression in a specific timezone"],"bestFor":["AI agents that manage scheduled tasks and need cron utilities","DevOps automation requiring cron validation and explanation","Chatbots that translate user scheduling intent into cron expressions"],"notFor":["Running or executing scheduled jobs (this is a parsing/explanation tool only)","High-volume batch processing where a local cron library would be more efficient"],"kindDetails":{},"updatedAt":"2026-04-22T02:20:30.601Z"}}