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SuperTokens vs Vapi

Vapi scores higher on the AgentReady, 78/100 against 54/100. They differ on 21 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

SuperTokens. Open source user authentication platform that helps developers build fast, maintain control, and reduce costs.

Vapi. Vapi is the developer platform for building voice AI agents.

Where SuperTokens is ahead

SuperTokens passes mcp discoverable, and Vapi 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. Vapi misses it.

And on adopt, no mandatory sales call, official python sdk, cli available and mcp integration available. Vapi misses those.

Where Vapi is ahead

Vapi passes structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented and limits / constraints documented, and SuperTokens 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: self-service signup, programmatic credential creation and fast time to first request. SuperTokens misses those.

And on operate, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable and observable execution. SuperTokens misses those.

What neither does

Both fail agent-compatible signup flow, 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. SuperTokens leads 100 to 87. SuperTokens misses nothing; Vapi misses mcp discoverable.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Vapi leads 92 to 31. SuperTokens misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Vapi misses authentication documented.

Adopt. SuperTokens leads 60 to 50. SuperTokens misses self-service signup, agent-compatible signup flow, programmatic credential creation, fast time to first request; Vapi misses no mandatory sales call, agent-compatible signup flow, official python sdk, cli available, mcp integration available.

Operate. Vapi leads 82 to 24. SuperTokens misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified; Vapi misses agent compatibility verified.

Pricing

SuperTokens starts at $0.02/MAU and has a free tier. Vapi starts at $0.05/min with no free tier.

Signal by signal

Which to pick

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

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