Agent Callback Mailbox for LangChain
us.inversolabs/agent-callback-mailbox
Paid replay-safe callback inboxes for asynchronous agent tasks with structured MCP results.
client:LangChain
transport:streamable-http
Install Agent Callback Mailbox in LangChain
pip install langchain-mcp-adapters
from langchain_mcp_adapters.client import MultiServerMCPClient
client = MultiServerMCPClient({
"agent-callback-mailbox": {
"transport": "streamable_http",
"url": "https://callbacks.inversolabs.us/mcp",
}
})
tools = await client.get_tools()
get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs