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Logto vs Stoplight

Logto scores higher on the AgentReady, 58/100 against 48/100. They differ on 8 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Logto. Logto is an open-source authentication and identity platform built for developers, offering auth, SSO, and RBAC for SaaS, AI agents, and B2B apps.

Stoplight. Stoplight is a collaborative platform equipping teams with tooling across the API lifecycle to help them build quality APIs efficiently.

Where Logto is ahead

Logto passes clear canonical domain, clear product positioning, llms.txt published and llms-full.txt / full agent docs, and Stoplight does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: authentication documented and limits / constraints documented. Stoplight misses those.

Where Stoplight is ahead

Stoplight passes cli available, and Logto does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

It also holds operate: structured, predictable output. Logto misses it.

What neither does

Both fail mcp discoverable, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, mcp integration available, 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. Logto leads 87 to 53. Logto misses mcp discoverable; Stoplight misses clear canonical domain, clear product positioning, llms.txt published, llms-full.txt / full agent docs, mcp discoverable.

Understand. Logto leads 54 to 38. Logto misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented; Stoplight misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Stoplight leads 55 to 50. Logto misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, cli available, mcp integration available; Stoplight misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, mcp integration available.

Operate. Stoplight leads 47 to 39. Logto misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Stoplight misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Logto starts at $0/mo and has a free tier. Stoplight starts at $44/mo and has a free tier.

Signal by signal

Which to pick

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

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