Borrowing it
Nothing to install: this file belongs to Open-Agent-Tools/open-paper-trading-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Open-Agent-Tools/open-paper-trading-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/Open-Agent-Tools/open-paper-trading-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/open-agent-tools/open-paper-trading-mcp/claude-md)<a href="https://agentmods.dev/instructions/open-agent-tools/open-paper-trading-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/open-agent-tools/open-paper-trading-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/open-agent-tools/open-paper-trading-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/open-agent-tools/open-paper-trading-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.06749 | $0.06749 |
| Opus 5 | $0.03374 | $0.03374 |
| Sonnet 5 | $0.01350 | $0.01350 |
| Haiku 4.5 | $0.00675 | $0.00675 |
Grade A, and why
open-paper-trading-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 11d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 642 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
Open Paper Trading MCP is a comprehensive paper trading simulator with dual interfaces: a REST API (FastAPI) and AI agent tools (MCP). The system simulates multi-asset trading (stocks, options, ETFs, bonds) with real market data for algorithmic trading development and AI agent training.
CRITICAL: Real Data Only Policy - The system MUST always use real market data from Robinhood API for all production APIs, MCP tools, and core trading service responses. Synthetic/test data should ONLY be used in pytest mocks and test fixtures. Never use test adapters in production Docker containers or live services.
Current Status (2025-08-06): 🎉 PRODUCTION READY QUALITY - Successfully implemented dual-server architecture with FastAPI server (port 2080) for frontend/API and independent MCP server (port 2081) for AI agent tools. Both servers running simultaneously with full functionality. FastMCP integration resolved via server separation after mounting conflicts. Code cleanup completed: All ruff linting issues resolved (100% compliance), core application 100% mypy compliant, 576/581 journey tests passing (99.1% success rate). AsyncIO infrastructure fully stabilized with zero warnings. Database connection pool optimized with proper resource management. Advanced Options Trading: Professional spread builder with 15+ strategies, real-time P&L analysis, and comprehensive risk metrics. MCP Tool Validation Complete: 42/42 ADK evaluations tested with 100% agent behavior validation - all agents correctly execute proper multi-step workflows using live market data.
Essential Commands
Development Commands
# Run all development tasks via the dev script
python scripts/dev.py <command>
# Available commands:
python scripts/dev.py server # Start FastAPI server only (port 2080)
python scripts/dev.py test # Run all tests (AVOID - use journey-based testing instead)
python scripts/dev.py format # Format code (uv run ruff format .)
python scripts/dev.py lint # Lint code (uv run ruff check . --fix)
python scripts/dev.py typecheck # Type check (uv run mypy .)
python scripts/dev.py check # Run all checks (format + lint + typecheck + tests)
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 11d ago First seen · 642 lines · 6,749 tokens per session scan A ac2c9656679f
open-paper-trading-mcp CLAUDE.md is an instructions file published in the GitHub repository Open-Agent-Tools/open-paper-trading-mcp (13 stars, last pushed 11mo ago), licensed Apache-2.0. It adds 6,749 tokens to every session, about $0.0337 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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