PowerSync
PowerSync is a sync engine that automatically synchronizes backend databases (Postgres, MongoDB, MySQL, SQL Server) with client-side SQLite, enabling offline-first and local-first applications. It consists of two components: the PowerSync Service (available as a managed cloud service or self-hosted via Docker) and a set of open-source client SDKs. Client SDKs are available for JavaScript/Web, React Native, Flutter/Dart, Kotlin, Swift, Node.js, .NET, and Rust. Authentication is handled via JWT tokens, with support for major providers including Auth0, Firebase, Supabase, Amazon Cognito, and Azure AD. PowerSync streams database changes in real-time so clients can query and mutate local SQLite without waiting on the network.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles PowerSync the way a machine reads it — 11 machine-readable artifacts across 6 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — PowerSync scores 33.6/100 (thin), with a separate agent-readiness read of 7/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile PowerSync
Each block below is one kind of artifact we hold for PowerSync. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
PowerSync Sync Service API
The PowerSync Service exposes a streaming sync protocol over HTTP/WebSocket that client SDKs connect to using JWT authentication. Clients submit their current bucket state and t...
PowerSync JavaScript / Web SDK
Client SDK for JavaScript and browser environments using Wasm-backed SQLite. Provides a PowerSyncDatabase class for local SQLite management with reactive queries, offline write ...
PowerSync React Native SDK
Client SDK for React Native and Expo applications, enabling offline-first mobile apps backed by embedded SQLite synced to Postgres, MongoDB, MySQL, or SQL Server.
PowerSync Flutter / Dart SDK
Client SDK for Flutter and Dart applications providing embedded SQLite sync with Rust-backed native connection pools and built-in encryption support.
PowerSync Kotlin SDK
Client SDK for Kotlin Multiplatform applications, enabling offline-first Android and cross-platform apps with embedded SQLite synced to backend databases.
PowerSync Swift SDK
Client SDK for Swift applications enabling offline-first iOS and macOS apps with embedded SQLite synced to backend databases via the PowerSync Service.
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Powersync Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Powersync Finops
FINOPSSemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Powersync Context
JSON-LDSecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for PowerSync — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 1
Reference material describing how the API behaves
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 1
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/powersync · machine-readable index on apis.io