x402 AI Framework Integrations
Pay-per-call AI tools for every major framework.
No crypto knowledge required. One pip install, zero config.
Installation
pip install x402-frameworks
Usage
LangChain
from x402_frameworks import x402LangChain
x402 = x402LangChain(api_key="your-key", auto_pay=True)
@x402.wrap_tool("token_scan")
@tool
def scan_token(address: str) -> dict:
"""Scan a token for rug pull indicators."""
return client.scan(address)
from langchain.agents import create_react_agent
agent = create_react_agent(llm, [scan_token], prompt)
# Payment handled automatically on every tool call
CrewAI
from x402_frameworks import x402CrewAI
x402 = x402CrewAI(api_key="your-key", max_budget_usd=50)
researcher = Agent(
role="Token Researcher",
tools=[x402.wrap("token_scan", scan_func)],
)
# Shared credit pool across all agents in the crew
AutoGen
from x402_frameworks import x402AutoGen
x402 = x402AutoGen(api_key="your-key")
analyst = AssistantAgent(
name="TokenAnalyst",
functions=[x402.as_function("token_scan")],
)
# AutoGen-compatible function specs with transparent payment
How It Works
- Developer wraps a tool function with
@x402.wrap_tool("tool_name")
- When the AI agent calls the tool, x402 checks:
- Free trial available? → use it
- Prepaid credits? → deduct
- Auto-pay enabled? → pay from wallet
- None? → raise
PaymentRequiredError with invoice details
- Tool executes, result returned to agent
Supported Frameworks
| Framework |
Adapter |
Status |
| LangChain |
x402LangChain |
✅ |
| CrewAI |
x402CrewAI |
✅ |
| AutoGen |
x402AutoGen |
✅ |
| Haystack |
Coming soon |
⏳ |
| Semantic Kernel |
Coming soon |
⏳ |
Configuration
| Env Var |
Default |
Description |
X402_API_KEY |
"" |
API key for authenticated access |
X402_BASE_URL |
https://mcp.rugmunch.io/mcp/x402 |
x402 MCP endpoint |
X402_AUTO_PAY |
false |
Auto-pay invoices from wallet |
X402_MAX_BUDGET |
0 |
Monthly budget cap (0 = unlimited) |
c762564d40