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Checkly vs Insomnia

Checkly scores higher on the AgentReady, 85/100 against 62/100. They differ on 17 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Checkly. The active reliability layer for developers & agents.

Insomnia. An AI-native API collaboration platform with native Kong Konnect integration for designing, debugging, and testing APIs.

Where Checkly is ahead

Checkly passes llms.txt published, and Insomnia does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented and limits / constraints documented. Insomnia misses those.

And on adopt, self-service signup, programmatic credential creation, fast time to first request and copyable quickstart. Insomnia misses those.

Finally, on operate, machine-readable errors, retry behavior documented and rate-limit behavior predictable. Insomnia misses those.

Where Insomnia is ahead

Insomnia passes mcp discoverable, and Checkly does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: official python sdk and mcp integration available. Checkly misses those.

What neither does

Both fail llms-full.txt / full agent docs, no mandatory sales call, idempotency support. 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. Insomnia leads 87 to 80. Checkly misses llms-full.txt / full agent docs, mcp discoverable; Insomnia misses llms.txt published, llms-full.txt / full agent docs.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Checkly leads 100 to 38. Checkly misses nothing; Insomnia misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Checkly leads 65 to 55. Checkly misses no mandatory sales call, official python sdk, mcp integration available; Insomnia misses self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart.

Operate. Checkly leads 94 to 67. Checkly misses idempotency support; Insomnia misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Checkly does not publish a machine-readable starting price and has a free tier. Insomnia does not publish one and has a free tier.

Signal by signal

Which to pick

Checkly clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: Checkly and Insomnia. Alternatives to each: Checkly, Insomnia.

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