For AI assistants and developers
The capital stack builder as an MCP server
Ask Claude, ChatGPT or another assistant to size a capital stack and it can run the same model as the stack builder on this site, price each layer from the current 10-year Treasury and Altus Group's quotes, and name who provides each layer, each answer with its source. Free, read-only, no key.
Add it to your AI assistant
Server URL (Streamable HTTP, no key, read-only):
https://cre.capital/mcp- Claude (claude.ai and the desktop app)
- Settings, then Connectors, then Add custom connector. Paste the URL and save. No sign-in is needed.
- ChatGPT
- Settings, then Apps and Connectors. Turn on Developer mode under Advanced, choose Create, paste the URL and set authentication to none.
- Grok
- grok.com, then Connectors, then New connector, then Custom. Paste the URL.
- Perplexity
- Settings, then Connectors, then Add custom connector, then MCP. Paste the URL and choose no authentication.
- Mistral Le Chat
- Intelligence, then Connectors, then Add connector, then Custom MCP connector. Paste the URL.
Claude Code:
claude mcp add --transport http cre-capital https://cre.capital/mcpCursor (~/.cursor/mcp.json) and other clients that read mcpServers:
{
"mcpServers": {
"cre-capital": {
"url": "https://cre.capital/mcp"
}
}
}VS Code (.vscode/mcp.json):
{
"servers": {
"cre-capital": {
"type": "http",
"url": "https://cre.capital/mcp"
}
}
}Gemini CLI (~/.gemini/settings.json):
{
"mcpServers": {
"cre-capital": {
"httpUrl": "https://cre.capital/mcp"
}
}
}Menu names change as the apps update. If a step has moved, look for "connectors" or "MCP" in the app's settings.
Tools
| Tool | What it returns | Try asking |
|---|---|---|
capital_stack | Runs the stack builder on a deal: each layer's amount and attachment and detachment LTV and LTC, blended cost of capital, DSCR, debt yields, common equity IRR and multiple, LP and sponsor IRRs, the exit and yearly cash flows. | I have a $20M deal with $1.4M NOI, an $11M senior loan, $2M of mezz and $2M of preferred equity. What is my equity IRR? |
get_capital_costs | The 10-year Treasury with the implied senior and mezzanine rates, Altus Group, CRE Debt Capital Markets Survey, Q2 2026 average quotes, and what public mortgage REITs report earning on each layer. | What do mezzanine loans cost right now? |
list_capital_providers | Fannie Mae DUS lenders, Freddie Mac Optigo lenders and mortgage REITs that hold mezzanine or preferred equity, as each institution publishes them. | Which public mortgage REITs provide preferred equity? |
Discovery file: /.well-known/mcp.json. The prices behind the tools are on What each layer costs.
License and attribution
Calculator output is free to use; please cite CRE Capital (cre.capital). Third-party data (Altus Group, the U.S. Treasury, SEC filings, Fannie Mae and Freddie Mac) belongs to its publisher. CRE Capital is published by Janover Capital LLC.
Questions people ask
Is there a cost or an API key?
No. The server is free, read-only and needs no key or sign-in. Please cite cre.capital or the source that comes back with each answer.
Does it give the same answer as the stack builder?
Yes. It runs the same model as the stack builder on the home page, with the same starting prices: the 10-year Treasury plus Altus Group's Q2 2026 average lender quotes, unless you give your own rates.
Is a result a quote?
No. Results are arithmetic on the inputs, not a quote, a projection, an offer or investment advice. Nothing is sent to a lender; the server logs only which tool was called, by which assistant and how long it took, never the deal numbers.
Questions or a data error: hello@cre.capital. Privacy and terms.
Have a question?
Send it to CRE Capital and we will reply by email.