Morpho SDKs

The Morpho Software Development Kits (SDKs) are a suite of TypeScript packages for building on the Morpho protocol - from a full-featured DeFi application to a liquidation bot, an indexer, or a simple data dashboard.

The entrypoint is the Morpho SDK - the default abstraction layer that produces ready-to-send transactions for VaultV2, Variable Rate - Blue Market (Morpho Blue), and Fixed Rate - Midnight Market in a single, consistent surface. When you need raw entity classes, low-level fetchers, or custom calldata composition, the Morpho SDK ships those primitives as subpath exports and dependencies, so you never have to reach past it.

The Morpho SDK

@morpho-org/morpho-sdk - the default and recommended SDK for application integrators. It is the abstraction layer that simplifies the Morpho protocol:

• One consistent abstraction layer across VaultV2, Variable Rate - Blue Market (Morpho Blue), and Fixed Rate - Midnight Market, with VaultV1 (MetaMorpho) supported under the hood for migrations / liquidity reallocation
• Builds final, deep-frozen viem Transaction objects - no calldata wrangling
• Handles ERC-20 approvals, Permit / Permit2 signatures, and Morpho setAuthorization for BlueBundlesV1 via a unified getRequirements() flow
• Routes every Blue and Vault write through Morpho Bundles (BlueBundlesV1, VaultBundlesV1, VaultExitBundlesV1) for you - atomic supply+borrow, repay+withdraw, Blue-to-Blue refinance, V1→V2 migration
• Slippage-protected where it applies: vault deposits are share-price protected (maxSharePrice), and Blue borrow, collateral-withdrawal, and refinance legs enforce an LLTV buffer
• Optional shared-liquidity reallocations through the Vault V2 BluePublicAllocator for borrow, withdraw, supply+borrow, and refinance flows - see the Vault V2 Public Allocator guide
• Midnight fixed-rate flows - take offers, publish maker offers, and maintain positions on Morpho's fixed-rate, fixed-term orderbook
• Strict TypeScript, no any, dedicated error classes for every failure mode

pnpm add @morpho-org/morpho-sdk viem

→ Read the Morpho SDK guide · Source on GitHub · Package on npm

Fixed rate (Midnight)

Midnight - fixed-rate, fixed-term lending through signed maker offers matched in an onchain orderbook - is a surface of the Morpho SDK, not a separate SDK: the Midnight page covers taker, maker, and position-maintenance transactions through the same getRequirements / buildTx flow.

Underneath, the Morpho SDK ships the low-level Midnight toolkit (the formerly standalone Midnight SDK, now folded in) and re-exports most of its surface on its own subpaths - /midnight-api, /abis, /constants, /utils, and /errors. Reach for the toolkit directly when you need offer construction, ratification, books and quotes, or tick math:

→ Read the Midnight toolkit guide · Source on GitHub

Reaching below the abstraction layer

When you need to reach below the abstraction layer - for raw entity classes, low-level on-chain fetchers, custom calldata composition, or simulation pipelines - the Morpho SDK ships those primitives as subpath exports, so you never need a separate package:

• @morpho-org/morpho-sdk/entities - Core entity classes (Market, Vault, Position) and offchain computations. The foundation of the rest of the stack.
• @morpho-org/morpho-sdk/fetch - Viem-based fetchers for live on-chain data.
• @morpho-org/morpho-sdk/abis, /addresses, /constants, /errors, /types - ABIs, deployment addresses, protocol constants, typed error classes, and shared types.
• @morpho-org/morpho-sdk/midnight-api - The Midnight HTTP API helpers (books, quotes, takeable offers, mempool validation).

See the Morpho SDK guide for the full surface.

Where next

• Recommended starting point: Morpho SDK guide
• Vault deposits & withdrawals: Vault guide
• Variable-rate lending & borrowing: Blue guide
• Fixed-term lending: Midnight toolkit guide
• Source code: morpho-org/sdks - the SDK monorepo containing @morpho-org/morpho-sdk and the Midnight toolkit
• Need help? Reach out via the chat on help.morpho.org.