BTC DCA Engine speaks the Model Context Protocol (MCP), the open standard AI assistants use to call tools. Connect Claude, ChatGPT, Cursor or any MCP client once, ask what a dollar-cost-averaging plan would have done, and get the simulator’s own figures — with a link that opens the identical run.
https://btcdcaengine.com/mcp
What would $50 a week into Bitcoin since January 2018 be worth?
run_dca · Bitcoin · $50 weekly · from 2018-01-01
$110,007.15 from $22,700 put in: 1.4057 ₿ bought across 454 weekly purchases. Counting each dollar from the day it went in, that is a 35.1% a year money-weighted return.
Data through 9 September 2026 · historical arithmetic, not advice
Open this run in the simulatorAn MCP server is a set of tools an AI assistant can use on your behalf. This one is the BTC DCA Engine itself: ask in plain words, and the assistant turns your question into a simulation, runs it here, and reports what came back.
Your assistant runs the exact engine behind the web app, against the same daily closes. It does not estimate from memory or scrape a chart.
Every result carries a link that opens the identical run in the simulator, pinned to the data it used, so you can check the chart yourself.
Weekly or monthly, Bitcoin or gold, 2017 or 2020: several plans over the same data, ranked by final value, with one link that opens them all together.
list_assets, data_status, run_dca and compare_plans. It reads price history and runs arithmetic. It never trades and never asks for a wallet.
Every result names the date of its data, credits its sources and says it is historical arithmetic, not advice — inside the answer, where the assistant reads it.
Claude, ChatGPT, Claude Code, Cursor, VS Code, Codex, Gemini CLI, Windsurf, Cline, and any other app that connects to a remote MCP server.
Every answer arrives with the run behind it.
Pinned to the data it used
Open the link and the simulator redraws the same plan on the same data vintage, so the figure your assistant quotes and the chart you see are one number. If an assistant ever misreads a result, the evidence is one click away.
You can connect with nothing but the URL. A free account’s key raises the daily allowance; Pro opens every asset, bigger comparisons and the overlays. Ask for something Pro without it and the answer says what unlocks it.
| No accountjust the URL | Freekey or sign-in | Pro$9/mo · $79/yr | |
|---|---|---|---|
| Simulations a day per address, or per key | 50 | 200 | 1,000 |
| Plans in one comparison | 2 | 2 | 5 |
| The seven free assets Bitcoin, Ethereum, Solana, XRP, S&P 500, Nasdaq 100 & Gold | ✓ | ✓ | ✓ |
| Every other asset silver, oil, real estate, Mag-7, bonds · 71 assets with Pro | — | — | ✓ |
| Fear & Greed overlay in the link | ✓ | ✓ | ✓ |
| Lump-sum benchmark | — | — | ✓ |
| Inflation (CPI) arm | — | — | ✓ |
| Mayer Multiple overlay | — | — | ✓ |
| Sharpe & Sortino risk metrics | — | — | ✓ |
| Smart DCA buy rules | — | — | ✓ |
| Price | $0 | $0 | $9/mo |
| Connect | Sign up | Go Pro |
Upgrading or canceling takes effect within a minute, with no reconnecting: a key or a sign-in is read against your account on every call.
claude.ai, the desktop app and mobile
https://btcdcaengine.com/mcpCustom connectors work on every Claude plan, including Free, and a connector added on the web appears in the desktop and mobile apps.
ChatGPT on the web
https://btcdcaengine.com/mcpDeveloper mode is on ChatGPT’s paid plans, and its menu names move between releases. ChatGPT has no field for a key, so it connects with the free view.
in your terminal
claude mcp add --transport http btcdca https://btcdcaengine.com/mcpclaude mcp add --transport http btcdca https://btcdcaengine.com/mcp --header "Authorization: Bearer YOUR_KEY"Type /mcp inside Claude Code to confirm it connected. Claude Code uses keys, not sign-in.
Each takes the same URL. Where a snippet has a headers line, it is optional: leave it out for the free view, or put your key in it to use your account.
Add to ~/.cursor/mcp.json (every project) or .cursor/mcp.json (one project):
{
"mcpServers": {
"btcdca": {
"url": "https://btcdcaengine.com/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
}
}Run MCP: Add Server from the Command Palette and choose HTTP, or add to .vscode/mcp.json:
{
"servers": {
"btcdca": {
"type": "http",
"url": "https://btcdcaengine.com/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
}
}Add to ~/.codex/config.toml. The key is read from an environment variable, never written into the file:
[mcp_servers.btcdca]
url = "https://btcdcaengine.com/mcp"
# optional: export BTCDCA_KEY=YOUR_KEY first
bearer_token_env_var = "BTCDCA_KEY"One command, or the same server under mcpServers in ~/.gemini/settings.json with httpUrl:
gemini mcp add --transport http btcdca https://btcdcaengine.com/mcpAdd to ~/.codeium/:
{
"mcpServers": {
"btcdca": {
"serverUrl": "https://btcdcaengine.com/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
}
}In Cline’s MCP settings, add a remote server. The transport must be named, or Cline assumes the older one:
{
"mcpServers": {
"btcdca": {
"type": "streamableHttp",
"url": "https://btcdcaengine.com/mcp",
"headers": { "Authorization": "Bearer YOUR_KEY" }
}
}
}Add a remote server using Streamable HTTP at the URL above. No authentication is needed. To use your account, send the header Authorization: Bearer YOUR_KEY. There is no local install and nothing to run.
Authorization header as Bearer YOUR_KEY.Up to five keys per account, each revocable on its own. A key carries no plan of its own, so it follows yours when you upgrade or cancel.
No key to copy or store. Assistants that cannot sign in, such as Claude Code, use a key instead.
Yes, to start. With no account you get 50 simulations a day per address, up to 2 plans per comparison, and the seven free assets. A free account’s key raises that to 200 a day. Pro, at $9/mo · $79/yr, unlocks all 71 assets, 5 plans per comparison, the overlays and 1,000 simulations a day.
No. It reports what a schedule of purchases would have been worth against real historical closes. Every result says so in its payload, so an assistant relaying the number carries the caveat with it.
No. All four tools are read-only. There is no trading, no exchange connection and nothing that asks for a wallet or a payment card.
Each answer runs to the latest completed day’s close, so it moves with the market. The share link is pinned to the data vintage it was computed against and keeps showing the same number, and an assistant can pin a question to a date with as_of.
A hashed daily counter per address or per key, and usage statistics that carry no address or identifier. For keys, the first characters, the label and the day each was last used. The full account is in the privacy policy.
The knowledge base has the connection guide, the tool reference with every argument and result field, and limits and troubleshooting.
Free to start: no account, no install, one URL.