@layerhop/ai

LayerHop tools for AI agents: best-price cross-chain and same-chain swap quotes (EVM chains and Solana), unsigned transactions, simulation, order tracking, token lookup, prices, deposit addresses and checkout. One framework-agnostic tool core with adapters for the Vercel AI SDK, LangChain JS, OpenAI function calling and the OpenAI Agents SDK.

The tools hold no private keys and never sign or broadcast. build_transaction returns unsigned transactions (plus transactionRequests, the ordered approval/swap list) for your own signer or the user's wallet.

npm install @layerhop/ai
# plus the framework you use: ai | @langchain/core | @openai/agents (optional peers)

import { generateText, stepCountIs } from "ai";
import { createVercelTools, AGENT_INSTRUCTIONS } from "@layerhop/ai/vercel";

const tools = createVercelTools({
  integrator: "myapp",          // your partner id: every quote earns your partner fee
  integratorFeeBps: 25,         // optional override (honored with your partner API key)
  apiKey: process.env.LAYERHOP_API_KEY, // optional; needed for deposit addresses and checkout
});

const { text } = await generateText({
  model: "openai/gpt-5",
  system: AGENT_INSTRUCTIONS,
  tools,
  stopWhen: stepCountIs(5),
  prompt: "Quote 100 USDC on Base to SOL. Sender 0xd8dA...6045, recipient 9WzD...AWWM.",
});

Other adapters:

import { createLangChainTools } from "@layerhop/ai/langchain";        // DynamicStructuredTool[]
import { createOpenAITools } from "@layerhop/ai/openai";              // { chatCompletionsTools, responsesTools, handleToolCall }
import { createOpenAIAgentsTools } from "@layerhop/ai/openai-agents"; // FunctionTool[] for @openai/agents
import { createLayerHopTools } from "@layerhop/ai";                   // plain { name, description, schema, execute, run }

Tools: list_chains, list_tokens, get_prices, get_quote, build_transaction, simulate_transaction, report_submitted, get_order_status, get_swap_link, create_deposit_address, get_deposit_address, create_checkout_session. Amounts in tool inputs are human decimals ("100" = 100 USDC). Quotes use the api fee channel.

Tested with ai 7.0.127, @langchain/core 1.2.12 and @openai/agents 0.18.0. ElizaOS, Coinbase AgentKit and GOAT have their own packages: @layerhop/plugin-elizaos, @layerhop/agentkit, @layerhop/goat.

Guide: https://docs.layerhop.com/guides/agent-frameworks

MIT licensed.