Borrowing it
Nothing to install: this file belongs to JoaoCarabetta/basedosdados-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/JoaoCarabetta/basedosdados-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/JoaoCarabetta/basedosdados-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/joaocarabetta/basedosdados-mcp/claude-md)<a href="https://agentmods.dev/instructions/joaocarabetta/basedosdados-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/joaocarabetta/basedosdados-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 | $0.02356 | $0.02356 |
| Opus 5 | $0.01178 | $0.01178 |
| Sonnet 5 | $0.00471 | $0.00471 |
| Haiku 4.5 | $0.00236 | $0.00236 |
Grade A, and why
basedosdados-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 7d 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 — 248 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
This is a Model Context Protocol (MCP) server for Base dos Dados, Brazil's open data platform. The server provides AI-optimized tools and resources for accessing datasets, tables, columns, and generating SQL queries through the MCP protocol.
Architecture
- server.py: Main MCP server implementation with enhanced GraphQL client and AI-friendly tools
- run_server.sh: Wrapper script for reliable Claude Desktop integration
- pyproject.toml: Project configuration with all dependencies (mcp, httpx, pydantic, google-cloud-bigquery)
- test_*.py: Comprehensive testing and debugging scripts
- README.md: Project documentation
Key Components
Enhanced MCP Server (server.py)
- GraphQL Client: Connects to Base dos Dados API (https://backend.basedosdados.org/graphql)
- AI-Optimized Tools: Single-call comprehensive data retrieval with BigQuery references
- Smart Search: Portuguese accent normalization, acronym prioritization, intelligent ranking
- Enhanced Resources: Context-aware help and guidance for LLM consumption
- Error Handling: Robust error handling with detailed debugging information
AI-Optimized Tools (4 enhanced tools)
search_datasets: ENHANCED LLM-CENTRIC SEARCH - Complete dataset context in single call- Comprehensive Enrichment: Full metadata, table structures, and column samples with types
- LLM-Optimized Formatting: Rich hierarchies with clear decision-support information
- Ready-to-Use References: Complete BigQuery paths and API identifiers for immediate access
- Smart Parallel Fetching: Backend search + GraphQL enrichment for maximum efficiency
- Error Resilient: Graceful degradation if enrichment fails
- Portuguese Intelligence: Accent normalization and acronym prioritization
- Complete Context: Organizations, themes, tags, table previews, column samples
- Workflow Guidance: Clear next steps and pro tips for efficient exploration
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.
- 7d ago First seen · 248 lines · 2,356 tokens per session scan A 24fe32e95b76
basedosdados-mcp CLAUDE.md is an instructions file published in the GitHub repository JoaoCarabetta/basedosdados-mcp (1 stars, last pushed 1y ago), licensed MIT. It adds 2,356 tokens to every session, about $0.0118 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 2026-08-31.
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