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Meridian Python SDK

Changelog

Changelog¶

Meridian SDK v0.3.0 (2026-09-01)¶

Initial release to support Meridian mPerps on Robinhood:

Support for isolated margin markets
Support for /v1/cancel-all endpoint

Ethereal SDK v0.2.1 (2026-07-31)¶

Changes¶

Allow unknown enum members without throwing an error, enabling forward compatibility

Ethereal SDK v0.2.0 (2026-06-03)¶

Mainnet¶

Updates all Pydantic types to match the latest release
Deprecates Socket.io support and all dependencies

Testnet¶

Add support for batch order submission and cancellation

Ethereal SDK v0.1.7 (2026-05-08)¶

Update mainnet and anvil contract ABIs
Remove Socket.io integration tests on testnet

Ethereal SDK v0.1.6 (2026-04-23)¶

Bug Fixes¶

Corrects a timing bug reintroduced in v0.1.4 which creates rare cases where order signatures fail validation

Ethereal SDK v0.1.5 (2026-04-16)¶

Mainnet types¶

Update mainnet Pydantic types to match the latest OpenAPI spec

Ethereal SDK v0.1.4 (2026-04-10)¶

Pydantic Types¶

Creates separate model files for the primary and archive APIs, which were previously combined
Adds support for the TradingView API, including Pydantic models and new methods for fetching price data
Updates types to match the latest deployments on Ethereal testnet

Ethereal SDK v0.1.3 (2026-03-19)¶

Types¶

Synced all Pydantic models with the latest OpenAPI spec from the exchange

Ethereal SDK v0.1.2 (2026-03-10)¶

WebSocket Transport¶

Added a new raw WebSocket transport using the websockets library, connecting to ws2.ethereal.trade. To enable this, specify transport: "websocket" in your WS client config
The existing Socket.IO transport (ws.ethereal.trade) remains the default

Other¶

Synced all Pydantic models with the latest OpenAPI spec from the exchange
Bug: Product cache now properly invalidates cached lookups (products_by_ticker, products_by_id) when refresh=True is specified

Ethereal SDK v0.1.1 (2026-03-03)¶

Types¶

Synced Pydantic models with the latest OpenAPI spec from the exchange

Ethereal SDK v0.1.0 (2026-01-20)¶

REST Client¶

Sync and async REST clients with full coverage of the Ethereal exchange API (orders, positions, products, funding, etc.) See the API Docs for more information
Order support including market/limit orders, stop orders, OCO/OTO, replace, cancel, and order dry runs
Product cache with products_by_ticker and products_by_id lookups
Archive endpoint support for historical balance and PnL data
Multi-network support: mainnet, testnet, and devnet

WebSocket Client¶

Sync and async WebSocket clients using Socket.IO (ws.ethereal.trade)
Subscribe to real-time BookDepth and OrderFill streams

Chain Client¶

Onchain operations on Ethereal: deposit USDe, finalize withdrawals, link/revoke/refresh signers
EIP-712 typed data signing for orders, withdrawals, and signer operations

Other¶

Pydantic models generated from the exchange OpenAPI spec
uvloop support on Unix platforms