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Cronitor vs FastCron

FastCron scores higher on the AgentReady, 52/100 against 45/100. They differ on 7 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Cronitor. Cronitor is a monitoring tool that alerts developers when their systems don't perform as expected, helping to quickly identify and address issues.

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

Where Cronitor is ahead

Cronitor passes clear canonical domain, and FastCron does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: official typescript sdk. FastCron misses it.

Where FastCron is ahead

FastCron passes structured api reference and authentication documented, and Cronitor does not. That is understand, whether an agent can read the docs and work out how the API behaves before calling it.

It also holds adopt: agent-compatible signup flow, fast time to first request and copyable quickstart. Cronitor misses those.

What neither does

Both fail 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, cli available, 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. Cronitor leads 73 to 67. Cronitor misses llms.txt published, llms-full.txt / full agent docs, mcp discoverable; FastCron misses clear canonical domain, llms.txt published, llms-full.txt / full agent docs, mcp discoverable.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. FastCron leads 46 to 23. Cronitor misses structured api reference, openapi / spec quality, authentication documented, 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 50. Cronitor misses agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, cli available, mcp integration available; FastCron misses programmatic credential creation, official typescript sdk, cli available, mcp integration available.

Operate. Both sit at 35/100 here. Cronitor 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

Cronitor starts at $0/mo 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: Cronitor and FastCron. Alternatives to each: Cronitor, FastCron.

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