langchain-spraay

LangChain tools for Spraay — multi-chain batch payments and x402 payment gateway for AI agents.

Overview

langchain-spraay provides LangChain-compatible tools that let AI agents:

• Send batch payments to up to 200 recipients in a single transaction across 13+ chains
• Access 200+ AI models via pay-per-request (no API keys needed)
• Query price oracles, execute DeFi swaps, manage payroll, and more
• Pay with USDC on Base via the x402 payment protocol — no accounts, no API keys

Installation

# Gateway tools (HTTP-based, no web3 needed)
pip install langchain-spraay

# Include on-chain smart contract tools
pip install langchain-spraay[onchain]

Quick Start

Gateway Tools (Recommended)

import os
from langchain_spraay import SpraayGatewayTool, SpraayToolkit

os.environ["SPRAAY_PRIVATE_KEY"] = "your-private-key-with-usdc-on-base"

# Use individual tools
tool = SpraayGatewayTool()
result = tool.invoke({
    "endpoint": "/price/eth",
    "method": "GET"
})

# Or load all tools via toolkit
toolkit = SpraayToolkit()
tools = toolkit.get_tools()  # 4 gateway tools ready to use

Batch Payments

from langchain_spraay import SpraayBatchPaymentTool

tool = SpraayBatchPaymentTool()
result = tool.invoke({
    "chain": "base",
    "token": "USDC",
    "recipients": ["0xAbc...", "0xDef...", "0x123..."],
    "amounts": ["100", "250", "50"]
})

AI Inference

from langchain_spraay import SpraayAIInferenceTool

tool = SpraayAIInferenceTool()
result = tool.invoke({
    "prompt": "Explain quantum computing in one paragraph",
    "model": "gpt-4o-mini",
    "provider": "openrouter"
})

On-Chain Tools

from langchain_spraay import SpraayBatchSendETH

tool = SpraayBatchSendETH()
result = tool.invoke({
    "recipients": ["0xAbc...", "0xDef..."],
    "amount_per_recipient_eth": "0.01"
})

With LangChain Agents

from langchain_spraay import SpraayToolkit
from langchain_openai import ChatOpenAI
from langgraph.prebuilt import create_react_agent

llm = ChatOpenAI(model="gpt-4o-mini")
toolkit = SpraayToolkit(include_onchain=True)
tools = toolkit.get_tools()

agent = create_react_agent(llm, tools)
result = agent.invoke({
    "messages": [{"role": "user", "content": "Send 0.01 ETH to 0xAbc... and 0xDef..."}]
})

Environment Variables

Available Tools

Gateway Tools

On-Chain Tools (require web3)

Supported Chains

Base, Ethereum, Arbitrum, Polygon, BNB Chain, Avalanche, Optimism, Solana, Bitcoin (PSBT), XRP Ledger, Bittensor, Stacks, BOB

Links

• Spraay Gateway
• Documentation
• MCP Server
• GitHub

License

MIT