agent402-langchain 0.1.0

Turn Agent402's 1,407 x402 pay-per-call tools into LangChain and CrewAI tools for Python agents. Free tier via proof-of-work — no wallet, no API keys.

agent402-langchain (Python)

Turn Agent402's 1,407 x402 pay-per-call tools into LangChain and CrewAI tools for Python agents.

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 1,407 individual ones (frameworks and LLMs both choke on thousands of tools):

Tool	What it does
agent402_find	Resolve a plain-language task to the best tool (slug, price, schema, example)
agent402_route	Cross-seller x402 router across the whole ecosystem
agent402_call	Call a tool by slug — auto-pays via proof-of-work (free) or your x402 fetch (paid)
agent402_about	The service manifest (identity, payment options, trust signals)

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