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cron-job.org vs FastCron

FastCron scores higher on the AgentReady, 52/100 against 40/100. They differ on 9 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

cron-job.org. A free web-based cron job scheduling service that executes websites and scripts at scheduled intervals, from minute-by-minute to once a year.

FastCron. FastCron is a simple online cronjob service to help you schedule and run tasks automatically.

Where cron-job.org is ahead

cron-job.org passes official typescript sdk and cli available, and FastCron does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

Where FastCron is ahead

FastCron passes clear product positioning and machine-readable metadata, and cron-job.org does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: structured api reference. cron-job.org misses it.

And on adopt, agent-compatible signup flow, fast time to first request, copyable quickstart and official python sdk. cron-job.org misses those.

What neither does

Both fail clear canonical domain, llms.txt published, llms-full.txt / full agent docs, mcp discoverable, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, mcp integration available, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover is whether an agent can find the product at all without being told it exists. FastCron leads 67 to 47. cron-job.org misses clear canonical domain, clear product positioning, llms.txt published, llms-full.txt / full agent docs, mcp discoverable, machine-readable metadata; FastCron misses clear canonical domain, llms.txt published, llms-full.txt / full agent docs, mcp discoverable.

Understand. FastCron leads 46 to 31. cron-job.org misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; FastCron misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. FastCron leads 60 to 45. cron-job.org misses agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, official python sdk, mcp integration available; FastCron misses programmatic credential creation, official typescript sdk, cli available, mcp integration available.

Operate. Both sit at 35/100 here. cron-job.org misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; FastCron misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

cron-job.org does not publish a machine-readable starting price and has a free tier. FastCron starts at $6/month and has a free tier.

Signal by signal

Which to pick

FastCron clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: cron-job.org and FastCron. Alternatives to each: cron-job.org, FastCron.

An agent can fetch this as data: POST /v1/compare {"slugs": ["cron-job", "fastcron"]}