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Powersync vs Xata

Xata scores higher on the AgentReady, 70/100 against 50/100. They differ on 7 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Powersync. PowerSync is a sync engine that consists of two components: a service that enables high-scalability partial data syncing and a set of client SDKs that manage client-side persistence, consistency, reactivity and syncing write operations back.

Xata. A Postgres platform with instant branching and scale-to-zero compute.

Where Xata is ahead

Xata passes mcp discoverable, and Powersync 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. Powersync misses it.

And on adopt, fast time to first request, copyable quickstart, official python sdk and mcp integration available. Powersync misses those.

Finally, on operate, agent compatibility verified. Powersync misses it.

What neither does

Both fail openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, programmatic credential creation, structured, predictable output, 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. Xata leads 100 to 87. Powersync misses mcp discoverable; Xata misses nothing.

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

Adopt is whether an agent can get a key and make its first successful call without a human in the loop. Xata leads 90 to 55. Powersync misses programmatic credential creation, fast time to first request, copyable quickstart, official python sdk, mcp integration available; Xata misses programmatic credential creation.

Operate. Xata leads 53 to 35. Powersync misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Xata misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Powersync starts at $0/month and has a free tier. Xata starts at $0.012/hr and has a free tier.

Signal by signal

Which to pick

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

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