The Grant Bishop connector
Grant Bishop has a connector: an MCP server that lets an AI assistant read the publication's pieces, its dated claims, its Index of companies and the documents it has open, and cite them with a link. It reads what any reader can read on this site. It needs no account, and it is free.
The address
The address is https://grantbishop.com/mcp.
It speaks the Model Context Protocol over Streamable HTTP, versions 2025-11-25, 2025-06-18 and 2025-03-26. No sign-in: the server is public and read-only, apart from the hello tool below.
How to add it
In Claude: Settings, then Connectors, then Add custom connector; paste the address and leave the authentication settings empty. In ChatGPT: turn on developer mode, then create an app with the address and no authentication. Any other MCP client: point it at the address as a Streamable HTTP server.
What it can do
search_pieces: find pieces by words, newest first, with their short versions and links.
get_piece: one piece in full, as Markdown, with its data-as-of date, the claim it bears on, the model that drafted it, what would change our mind and the disclosure lines.
list_claims: every dated claim on the claims board, with its status and next review date.
get_claim: one claim, what would prove it wrong, how it is checked and its dated history.
get_index_entry: one company in the Index: what it makes, where it sits, its latest filing, the pieces that name it and its market record (a dated close two data providers agree on).
list_open_file: the documents we have open this week, dated, with links.
get_brief: the short form of one piece, written to be passed on as it stands: headline, standfirst, the bottom line, the claim it bears on and that claim's review date.
hello: leave the publisher a short note about who you are and what you were looking for. It writes only that note.
subscribe: send the standard confirmation email to one address. Nothing else goes to that address unless its owner clicks the link in it.
What it does not do
It carries no ratings and no view on any security, and it does not tell anyone what to do with one; the only prices are an Index entry's dated closes, kept where two data providers agree. It does not read your conversation, your files or your memory, and it stores nothing you ask it. It reaches nothing outside this publication, except the one confirmation email subscribe sends.
Limits
60 requests a minute per address; hello, 5 an hour and 20 a day. Requests over 64 KB, and hello notes over 2 KB, are refused. A refused request says why and when to try again.
Troubleshooting
"Couldn't connect": check the address is exactly https://grantbishop.com/mcp, with no trailing slash and no authentication set. A browser visit to the address returns "Method not allowed"; that is expected, because the connector answers only POST requests from an MCP client.
"Rate limited": wait the number of seconds the message gives.
"No published piece has the slug": use search_pieces to find the slug first.
Anything else: write to desk@grantbishop.com with the time and the tool you called.