@cdr-kit/langchain

LangChain adapter for cdr-kit. All 34 CDR tools as StructuredTools for an agent / tool-calling chain.

Install

pnpm add @cdr-kit/langchain @cdr-kit/agent @langchain/core @langchain/anthropic

Quick start

import { CdrAgent } from "@cdr-kit/agent";
import { getLangChainTools } from "@cdr-kit/langchain";
import { ChatAnthropic } from "@langchain/anthropic";
import { AgentExecutor, createToolCallingAgent } from "langchain/agents";
import { ChatPromptTemplate } from "@langchain/core/prompts";

const agent = new CdrAgent({
  privateKey: process.env.WALLET_PRIVATE_KEY as `0x${string}`,
  rpcUrl: "https://aeneid.storyrpc.io",
});

const tools = getLangChainTools(agent);

const model = new ChatAnthropic({ model: "claude-opus-4-7" });
const prompt = ChatPromptTemplate.fromMessages([
  ["system", "You are a CDR agent. Use the tools to discover and read encrypted vaults."],
  ["human", "{input}"],
  ["placeholder", "{agent_scratchpad}"],
]);

const toolCallingAgent = await createToolCallingAgent({ llm: model, tools, prompt });
const executor = new AgentExecutor({ agent: toolCallingAgent, tools });

const result = await executor.invoke({
  input: "Find a recent trading-signal vault and decrypt it.",
});
console.log(result.output);

What you get

• All 34 CDR tools as LangChain StructuredTools
• Each tool has a Zod schema → LangChain converts to JSON-Schema automatically
• Works with any LangChain-compatible model

Peer dependencies

• @cdr-kit/agent ≥ 0.7.0
• @langchain/core ≥ 0.3
• viem ≥ 2.21

Links

• Full docs: https://cdrkit.xyz/docs/agent-kit/langchain
• npm: https://www.npmjs.com/package/@cdr-kit/langchain
• GitHub: https://github.com/Blockchain-Oracle/cdr-kit
• LangChain: https://langchain.com