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Adyen vs Lago

Adyen scores higher on the AgentReady, 55/100 against 39/100. They differ on 14 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Adyen. One platform for payments, data, and financial products.

Lago. Lago is a billing platform that provides API access for pushing customer information and metrics (events) from applications to a billing system.

Where Adyen is ahead

Adyen passes clear canonical domain, clear product positioning, public docs discoverable, llms.txt published, llms-full.txt / full agent docs and machine-readable metadata, and Lago does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: pricing understandable. Lago misses it.

And on adopt, agent-compatible signup flow and free trial or free allowance. Lago misses those.

Finally, on operate, structured, predictable output and observable execution. Lago misses those.

Where Lago is ahead

Lago passes authentication documented, and Adyen 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: no mandatory sales call. Adyen misses it.

And on operate, agent compatibility verified. Adyen misses it.

What neither does

Both fail structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, self-service signup, programmatic credential creation, fast time to first request, copyable quickstart, cli available, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable. 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. Adyen leads 100 to 47. Adyen misses nothing; Lago misses clear canonical domain, clear product positioning, public docs discoverable, llms.txt published, llms-full.txt / full agent docs, machine-readable metadata.

Understand. Both sit at 23/100 here. Adyen misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Lago misses structured api reference, openapi / spec quality, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. Adyen leads 50 to 45. Adyen misses self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, cli available; Lago misses self-service signup, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request, copyable quickstart, cli available.

Operate. Adyen leads 47 to 41. Adyen misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Lago misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution.

Pricing

Adyen starts at $0.13 with no free tier. Lago does not publish one.

Signal by signal

Which to pick

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

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