LangChain HEY Research Lab Prompt/explain_project_evidence
How to: LangChain HEY Research Lab explain_project_evidence
Add HEY Research Lab to LangChain
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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({
"hey-research": {
"transport": "streamable_http",
"url": "https://heyresearch.xyz/mcp",
}
})
tools = await client.get_tools()
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02
Save the file and restart LangChain.
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03
explain_project_evidence is surfaced through the client's prompt API, fetched by name. Unlike a tool, you invoke it deliberately — LangChain will not call it for you.
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04
If it does not appear, check that HEY Research Lab is connected and that you are looking at its prompts rather than its tools.
get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs
Set these first
HEY Research Lab will not start until these are set, so it never reaches LangChain.
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HEY_API_KEY -
HEY_MCP_PROFILE
Same prompt, other clients
Read from the server itself, by connecting to it and calling prompts/list on 5 October 2026.
A listing does not declare its prompts, 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 prompt's arguments.