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LangChain SnapEX Pay Resource/webhooks

How to: LangChain SnapEX Pay webhooks

client:LangChain transport:streamable-http resource:webhooks

Add SnapEX Pay to LangChain

  1. 01

    Open pip install langchain-mcp-adapters and merge this in. Keep any servers already there.

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "pay": {
            "transport": "streamable_http",
            "url": "https://pay.snapex.pro/mcp",
        }
})

tools = await client.get_tools()
  1. 02

    Save the file and restart LangChain.

  2. 03

    webhooks is surfaced through the client's resource API, read by URI. It is context to attach, not an action to run.

  3. 04

    If it does not appear, check that SnapEX Pay is connected and that you are looking at its resources rather than its tools.

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

Set these first

SnapEX Pay will not start until these are set, so it never reaches LangChain.

  • SNAPEX_API_KEY
  • SNAPEX_BASE_URL

Same resource, other clients

Read from the server itself, by connecting to it and calling resources/list on 14 November 2026. A listing does not declare its resources, so asking is the only way to know them, and this is what the server actually offers rather than what its listing claims. Names only are stored; connect the server for each resource's type and contents.