langgraph-api

Rust API Client SDK for LangGraph API

Overview

This is an auto-generated Rust client library for the LangGraph API. It provides type-safe bindings for interacting with LangGraph Cloud, which enables building and running stateful, multi-actor applications with LLMs.

Features

• Type-safe API client: Auto-generated from OpenAPI specification
• Async/await support: Built on reqwest with async/await
• Flexible TLS backends: Choose between rustls-tls (default) or native-tls
• Comprehensive API coverage: Full support for all LangGraph endpoints including:
  • Assistant management (create, search, versioning, graph inspection)
  • Thread and conversation management
  • Run execution (stateful and stateless, with streaming support)
  • Scheduled runs with cron jobs
  • Key-value store operations
  • Agent-to-Agent Protocol (A2A) communication
  • Model Context Protocol (MCP) support
  • System operations (health checks, server info, metrics)

Installation

Add this to your Cargo.toml:

[dependencies]
langgraph-api = { version = "0.1.1", features = ["rustls-tls"] }

Or with native TLS:

[dependencies]
langgraph-api = { version = "0.1.1", features = ["native-tls"] }

Version Compatibility

The following table shows the version correspondence between the client and LangGraph API:

Please ensure you use a compatible client version for your LangGraph API version to avoid compatibility issues.

Usage

use langgraph_api::apis::*;
use langgraph_api::models::*;
...

Features

• default: Enables rustls-tls feature
• rustls-tls: Use rustls for TLS (default, recommended)
• native-tls: Use native TLS implementation

Development

This SDK is generated from the OpenAPI specification using OpenAPI Generator.

To regenerate the SDK:

./scripts/generate_api_sdk.sh

This script:

1. Generates the SDK from api/langgraph-openapi.json
2. Copies the generated code to src/generated/
3. Formats the code with cargo fmt

Requirements

• Rust 1.85 or later
• OpenAPI Generator CLI (for regeneration)

License

See LICENSE file for details.

Contributing

Contributions are welcome! Please ensure that:

• Code is formatted with cargo fmt
• All tests pass with cargo test
• Clippy checks pass with cargo clippy