# Developer documentation

Start integrating with Polyester APIs, SDKs, realtime streams, and trading interfaces.

Polyester developer documentation covers API connectivity, authentication, trading, funds and transfers, realtime data, and official SDKs.

## Choose your path

## REST & JSON

- [REST getting started](https://testnet.polyester.com/docs/developer-docs/rest/getting-started)
- [WebSocket JSON](https://testnet.polyester.com/docs/developer-docs/rest/websocket-json)

## ConnectRPC & Protobuf

- [ConnectRPC getting started](https://testnet.polyester.com/docs/developer-docs/connectrpc/getting-started)
- [Scaled integers](https://testnet.polyester.com/docs/developer-docs/connectrpc/scaled-integers)
- [WebSocket Protobuf](https://testnet.polyester.com/docs/developer-docs/connectrpc/websocket-protobuf)
- [TypeScript SDK](https://testnet.polyester.com/docs/sdk/typescript/get-started)
- [Python SDK](https://testnet.polyester.com/docs/sdk/python/get-started)
- [Go SDK](https://testnet.polyester.com/docs/sdk/go/get-started)
- [Rust SDK](https://testnet.polyester.com/docs/sdk/rust/get-started)

## SBE order entry

- [SBE WebSocket getting started](https://testnet.polyester.com/docs/developer-docs/sbe-websocket/getting-started)
- [WebSocket Protobuf](https://testnet.polyester.com/docs/developer-docs/connectrpc/websocket-protobuf)

## Institutional FIX

- [FIX Classic getting started](https://testnet.polyester.com/docs/developer-docs/fix-classic/getting-started)
- [FIX-SBE getting started](https://testnet.polyester.com/docs/developer-docs/fix-sbe/getting-started)

## API foundations

- [Connectivity matrix](https://testnet.polyester.com/docs/developer-docs/getting-started/connectivity-matrix)
- [SDK capability matrix](https://testnet.polyester.com/docs/developer-docs/getting-started/sdk-capability-matrix)
- [Funds & Transfers](https://testnet.polyester.com/docs/developer-docs/funds-transfers/overview)
- [Public IDs](https://testnet.polyester.com/docs/developer-docs/shared-concepts/public-ids)
- [Client order IDs and idempotency](https://testnet.polyester.com/docs/developer-docs/shared-concepts/client-order-ids)
- [WebSocket session model](https://testnet.polyester.com/docs/developer-docs/shared-concepts/websocket-session-model)
- [Ed25519 API keys](https://testnet.polyester.com/docs/developer-docs/authentication-security/ed25519-api-keys)
- [API-key replay protection](https://testnet.polyester.com/docs/developer-docs/authentication-security/api-key-replay-policy)
- [Multi-factor authentication](https://testnet.polyester.com/docs/developer-docs/authentication-security/multi-factor-authentication)
- [Withdrawals and transfer security](https://testnet.polyester.com/docs/developer-docs/authentication-security/withdrawals-and-transfers-security)