agent402-langchain (Python)

Turn Agent402's catalog of 500+ pay-per-call tools and skill packs into LangChain tools for Python agents.

Agent402 is the applied layer of Agentic Finance - agents that pay and get paid on their own over the two open wires, x402 and MPP (Machine Payments Protocol). Every paid endpoint answers both on the same 402; this package pays wallet-only tools through the x402_fetch callable you pass (below).

Pure-CPU tools (hashing, encoding, QR, markdown, JSON, readability…) are free via built-in proof-of-work - no wallet, no API keys. Live-data tools (market data, web search, EDGAR, on-chain) are wallet-only and settle in USDC.

pip install "agent402-langchain[langchain]"

from agent402_langchain import Agent402Toolkit

toolkit = Agent402Toolkit(base_url="https://agent402.tools")
tools = toolkit.get_tools()   # four meta-tools your agent can call

It exposes four meta-tools rather than 500+ individual ones (frameworks and LLMs both choke on thousands of tools):

Paid (wallet-only) tools

Pass x402_fetch - a callable with the requests-style signature (method, url, **kwargs) -> requests.Response that signs the USDC payment:

toolkit = Agent402Toolkit(base_url="https://agent402.tools", x402_fetch=my_signed_fetch)

Without it, calling a wallet-only tool raises a clear error naming what's needed; the free proof-of-work tier keeps working regardless.

Without LangChain

agent402_tool_specs() returns the same four entries as framework-agnostic dicts (name, description, JSON Schema, and a plain execute callable) - no langchain-core needed.

MIT © Havok Holdings LLC · github.com/MikeyPetrillo/Agent402