Crashtestyourstrategy

Name: Crashtestyourstrategy
Author: fnobbe

by fnobbeversion 1.0.1i★ –iRuns in the cloud

Registry nameio.github.fnobbe/crashtestyourstrategy

Install

Overview

Description from the maker (original English)

Portfolio and strategy stress diagnostics with hedge-break detection and regime outlook. Free tier.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Chat & email

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://mcp.crashtestyourstrategy.ai/mcp

Run this in your terminal

claude mcp add --transport http crashtestyourstrategy https://mcp.crashtestyourstrategy.ai/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "crashtestyourstrategy": {
      "url": "https://mcp.crashtestyourstrategy.ai/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "crashtestyourstrategy": {
      "type": "http",
      "url": "https://mcp.crashtestyourstrategy.ai/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://mcp.crashtestyourstrategy.ai/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account fnobbe, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1782 servers in this category
Published to the registry more recently than 20% of the other 1782 servers in this category
Basic checks equal to or better than 100% of the other 1782 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Crashtestyourstrategy safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

CrashTestYourStrategy — MCP Server

Remote MCP server for portfolio & trading-strategy stress diagnostics. Free tier — no key, no signup. Descriptive, never advisory.

https://mcp.crashtestyourstrategy.ai/mcp

Listed in the official MCP registry as io.github.fnobbe/crashtestyourstrategy. This repository is the public server card — the service itself is closed-source; everything an agent (or a reviewer) needs to verify behaviour is linked below.

Quick start

Claude Code:

claude mcp add --transport http ctys https://mcp.crashtestyourstrategy.ai/mcp

Generic MCP client config (streamable HTTP):

"mcpServers": { "ctys": { "type": "streamable-http", "url": "https://mcp.crashtestyourstrategy.ai/mcp" } } }

claude.ai: *Settings → Connectors → Add custom connector* with the URL above.

The free tier is rate-limited per IP (30 req/min). No account, no key.

What it does

An open diagnostics layer that confronts a proposed portfolio or trading strategy with the failure modes an optimistic backtest ignores — hedge breaks (the 2022 stock-bond case), sequence-of-returns risk, regime blind spots, deflated Sharpe.

Free tier (16 tools)

Group	Tools
Portfolio	`portfolio_stress_test` (multi-asset stress across baseline / risk-off / rate-shock regimes, hedge-break detection, full drawdown distribution) · `portfolio_compare` · `factor_decomposition` · `ips_gate` (hard gate vs an Investment Policy Statement, breach probability not median path) · `long_horizon_stress` (multi-year savings/withdrawal plans, ruin probabilities)
Strategy	`run_stress_test` · `challenge_strategy` · `backtest_integrity` (deflated Sharpe + which crisis regimes the backtest window missed)
Regimes	`regime_outlook` (model-conditional BULL/SIDEWAYS/BEAR/CRISIS probabilities at 5/21 trading days — preregistered, out-of-sample validated, refreshed daily) · `market_regime_map` (18-category cross-asset map) · `describe_regime` · `find_similar_regime`
Record & catalog	`list_investment_theses` · `get_investment_thesis` · `get_dossier` (citable audit trail of prior calls) · `submit_feedback`

Full tier (token via contact): tier2_stress_test (stress any ticker with auto-calibration + realism gate), build_portfolio, portfolio_frontier.

Response contract

Every response is a versioned envelope (ctys-agent-v1 family) carrying:

grounding_summary — a risk-focused factual statement of the omitted tail
revision_required — a gate-capable signal (never a directive)
methodological_limitations — required disclosure of what the diagnostic does NOT establish
data_through / data_staleness_days — self-reported data freshness (EOD, refreshed daily)

validation:// resources expose the realism trust layer: 18 measured stylized facts per asset vs historical reference bands — the falsifiability surface. Recompute locally; trust by independent reproduction.

Scope & compliance

Model-based scenario simulation. Descriptive, never advisory: no suitability, timing, or ranking claim is made or implied — the agent decides what "suitable" means. Out-of-sample limits are disclosed, not hidden (e.g. the GFC hedge-behaviour test failed and ships as a documented limitation).

Crashtestyourstrategy

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

CrashTestYourStrategy — MCP Server

Quick start

What it does

Response contract

Scope & compliance

Links