Borrowing it
Nothing to install: this file belongs to berlinbra/alpha-vantage-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/berlinbra/alpha-vantage-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/berlinbra/alpha-vantage-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/berlinbra/alpha-vantage-mcp/claude-md)<a href="https://agentmods.dev/instructions/berlinbra/alpha-vantage-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/berlinbra/alpha-vantage-mcp/claude-md.svg" alt="Measured on agentmods" 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 | $0.01470 | $0.01470 |
| Opus 5 | $0.00735 | $0.00735 |
| Sonnet 5 | $0.00294 | $0.00294 |
| Haiku 4.5 | $0.00147 | $0.00147 |
Grade A, and why
alpha-vantage-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 8d 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 — 170 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Alpha Vantage MCP Server - Claude.md
Overview
The Alpha Vantage MCP Server is a Model Context Protocol (MCP) implementation that provides real-time access to financial market data through the Alpha Vantage API. This server enables Claude and other AI assistants to retrieve stock quotes, company information, and cryptocurrency data.
Architecture
Core Components
- server.py - Main MCP server implementation that handles tool registration and execution
- tools.py - Utility functions for API requests and data formatting
- smithery.yaml - Smithery MCP configuration for automated deployment
Key Features
-
Stock Market Data
- Real-time stock quotes with price, volume, and change data
- Detailed company information (sector, industry, market cap)
- Historical daily time series data (OHLCV)
-
Cryptocurrency Support
- Real-time cryptocurrency exchange rates with bid/ask prices
- Daily, weekly, and monthly cryptocurrency time series data
-
Advanced Options Data
- Historical options chain data with Greeks calculations
- Advanced filtering and sorting capabilities by strike, volume, IV, etc.
-
Error Handling & Rate Limiting
- Built-in error handling for API failures
- Rate limit management and timeout handling
- Comprehensive error messages
- CRITICAL: Never use placeholder data in responses - always handle errors properly and transparently
Available Tools
The server implements 12 MCP tools:
- get-stock-quote - Current stock quote information
- get-company-info - Detailed company overview data
- get-crypto-exchange-rate - Cryptocurrency exchange rates
- get-time-series - Historical daily stock price data
- get-realtime-options - Real-time options chain data (premium required)
- get-historical-options - Options chain data with sorting
- get-etf-profile - Comprehensive ETF profile with holdings and sector allocation
- get-crypto-daily - Daily cryptocurrency time series
- get-crypto-weekly - Weekly cryptocurrency time series
- get-crypto-monthly - Monthly cryptocurrency time series
- get-earnings-calendar - Upcoming earnings calendar data
- get-historical-earnings - Historical earnings data
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.
- 8d ago First seen · 170 lines · 1,470 tokens per session scan A f524354a5fb8
alpha-vantage-mcp CLAUDE.md is an instructions file published in the GitHub repository berlinbra/alpha-vantage-mcp (104 stars, last pushed 10mo ago), licensed MIT. It adds 1,470 tokens to every session, about $0.0073 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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