generated: '2026-07-18'
method: searched
source: npm, PyPI, pkg.go.dev registries + developers.flow.com SDK docs
note: >-
  Dapper Labs created the Flow blockchain and maintains its client SDKs under the
  onflow GitHub organization. These are the first-party client libraries for the
  Flow Access API. flow-py-sdk is a community package (not first-party).
packages:
  - language: javascript
    registry: npm
    name: "@onflow/fcl"
    url: https://www.npmjs.com/package/@onflow/fcl
    install: npm install @onflow/fcl
    latest: 1.21.11
    description: High-level JavaScript/TypeScript library (Flow Client Library) for building web apps on Flow.
    official: true
  - language: javascript
    registry: npm
    name: "@onflow/sdk"
    url: https://www.npmjs.com/package/@onflow/sdk
    install: npm install @onflow/sdk
    latest: 1.13.7
    description: Low-level JavaScript/TypeScript SDK for interacting with the Flow blockchain.
    official: true
  - language: javascript
    registry: npm
    name: "@onflow/types"
    url: https://www.npmjs.com/package/@onflow/types
    install: npm install @onflow/types
    latest: 1.5.0
    description: Utilities to transform JavaScript values into Cadence-understood arguments.
    official: true
  - language: javascript
    registry: npm
    name: "@onflow/transport-http"
    url: https://www.npmjs.com/package/@onflow/transport-http
    install: npm install @onflow/transport-http
    latest: 1.15.6
    description: Flow SDK HTTP transport module for the REST Access API.
    official: true
  - language: javascript
    registry: npm
    name: "@onflow/kit"
    url: https://www.npmjs.com/package/@onflow/kit
    install: npm install @onflow/kit
    latest: 0.9.0
    description: React library (hooks/components) for interacting with the Flow blockchain.
    official: true
  - language: go
    registry: go
    name: github.com/onflow/flow-go-sdk
    url: https://pkg.go.dev/github.com/onflow/flow-go-sdk
    install: go get github.com/onflow/flow-go-sdk
    description: Official Go SDK for the Flow blockchain Access API (gRPC).
    official: true
  - language: cli
    registry: github
    name: flow-cli
    url: https://github.com/onflow/flow-cli
    install: 'sh -ci "$(curl -fsSL https://raw.githubusercontent.com/onflow/flow-cli/master/install.sh)"'
    description: The Flow CLI binary (also `brew install flow-cli`). Command surface catalogued in cli/.
    official: true
  - language: python
    registry: pypi
    name: flow-py-sdk
    url: https://pypi.org/project/flow-py-sdk/
    install: pip install flow-py-sdk
    description: Community Python SDK for the Flow blockchain (maintained by Janez Podhostnik, not first-party).
    official: false