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Fauna vs TiDB Cloud

TiDB Cloud scores higher on the AgentReady, 65/100 against 20/100. They differ on 20 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Fauna. Fauna is a distributed serverless database that combines document flexibility with relational power, automatic scaling, and zero operational overhead.

TiDB Cloud. TiDB Cloud is a cloud-native distributed SQL database service that provides infrastructure for infinite agents and infinite data, with support for AI applications, vector search, and multi-modal data platforms.

Where Fauna is ahead

Fauna passes pricing understandable, and TiDB Cloud 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: free trial or free allowance and official python sdk. TiDB Cloud misses those.

Where TiDB Cloud is ahead

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

It also holds understand: structured api reference and authentication documented. Fauna misses those.

And on adopt, self-service signup, no mandatory sales call, agent-compatible signup flow, cli available and mcp integration available. Fauna misses those.

Finally, on operate, canonical workflow succeeds, structured, predictable output, observable execution and agent compatibility verified. Fauna misses those.

What neither does

Both fail clear canonical domain, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, fast time to first request, copyable quickstart, 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. TiDB Cloud leads 93 to 33. Fauna misses clear canonical domain, clear product positioning, public docs discoverable, llms.txt published, llms-full.txt / full agent docs, mcp discoverable, machine-readable metadata; TiDB Cloud misses clear canonical domain.

Understand. TiDB Cloud leads 38 to 23. Fauna misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; TiDB Cloud misses openapi / spec quality, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt. TiDB Cloud leads 65 to 25. Fauna misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, cli available, mcp integration available; TiDB Cloud misses programmatic credential creation, free trial or free allowance, fast time to first request, copyable quickstart, official python sdk.

Operate is whether an agent can run against it in production and recover when a call fails. TiDB Cloud leads 65 to 0. Fauna misses canonical workflow succeeds, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified; TiDB Cloud misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Fauna starts at $150/mo with no free tier. TiDB Cloud does not publish one.

Signal by signal

Which to pick

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

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