@true402.dev/langchain

@true402.dev/langchain

  Stable · production-ready — semver-stable public API (v1.0).

true402 tools for LangChain — give your Base agent pay-per-call on-chain safety over x402: rug/honeypot checks, address safety, and deployer reputation. No account, no API key — the wallet is the identity (USDC on Base, gas sponsored by the facilitator).

npm i @true402.dev/langchain @langchain/core

import { createTrue402Tools } from '@true402.dev/langchain';

const tools = createTrue402Tools({ payerPrivateKey: process.env.PAYER_PRIVATE_KEY! });
// → add `tools` to any LangChain agent (createReactAgent, AgentExecutor, …)

The agent can now call, before it trades:

Tool	What it does	~price
true402_token_report	Composite avoid / caution / ok verdict for a Base ERC-20 (buy/sell honeypot sim + liquidity + ownership + rug activity)	$0.01
true402_token_safety	Structural safety score 0–100 + flags	$0.005
true402_address_safety	Profile + risk for any address before you send/approve/call it (proxy detection)	$0.005
true402_deployer_check	Deployer reputation — who made the token + their track record	$0.008

payerPrivateKey is a Base wallet holding a little USDC. Without it the stalls still return their HTTP 402 price, so the agent can decide. Override baseUrl / rpcUrl in the options if self-hosting.

Powered by true402 — the machine-native x402 marketplace on Base. Browse every stall at /catalog.