Borrowing it
Nothing to install: this file belongs to chaba11/mcp-stm-montevideo. 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/chaba11/mcp-stm-montevideo/main/CLAUDE.mdgit clone --depth 1 https://github.com/chaba11/mcp-stm-montevideoWrote 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/chaba11/mcp-stm-montevideo/claude-md)<a href="https://agentmods.dev/instructions/chaba11/mcp-stm-montevideo/claude-md"><img src="https://agentmods.dev/badge/instructions/chaba11/mcp-stm-montevideo/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/chaba11/mcp-stm-montevideo/claude-md"><img src="https://agentmods.dev/badge/instructions/chaba11/mcp-stm-montevideo/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 | $0.00511 | $0.00511 |
| Opus 5 | $0.00255 | $0.00255 |
| Sonnet 5 | $0.00102 | $0.00102 |
| Haiku 4.5 | $0.00051 | $0.00051 |
Grade A, and why
mcp-stm-montevideo 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 9d 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.
What it actually says
MCP STM Montevideo
Qué es este proyecto
Un MCP server en TypeScript que expone datos del Sistema de Transporte Metropolitano (STM) de Montevideo, Uruguay. Permite que LLMs respondan preguntas como "¿cuándo pasa el próximo 181 por Bv España y Libertad?"
Stack
- Runtime: Node.js 20+ con TypeScript
- MCP SDK:
@modelcontextprotocol/sdk - Build:
tsup - Test:
vitest - Geo:
geolib - Package name:
mcp-stm-montevideo
Fuentes de datos
- CKAN Montevideo:
https://ckan.montevideo.gub.uy/api/3/action/ - Dataset horarios por parada:
horarios-de-omnibus-urbanos-por-parada-stm - Dataset paradas: buscar en CKAN el que tenga ubicación de paradas con coordenadas
- Dataset recorridos: buscar en CKAN
- Las coordenadas pueden estar en EPSG:32721 (UTM 21S) — convertir a WGS84
- Timezone: America/Montevideo para todos los cálculos
Reglas de desarrollo
- Todo el código en
src/ - Tests en
tests/con vitest - Nunca hardcodear URLs de recursos CKAN (los resource_id cambian). Usar
package_showpara resolver dinámicamente. - Cache en memoria con TTL: 1h para horarios, 24h para paradas estáticas
- Manejo de errores robusto: si CKAN no responde, devolver mensaje claro al usuario
- Código y comments en inglés, README bilingüe (es/en)
- Cada tool del MCP debe tener inputSchema completo con descriptions en español
Cómo verificar
npm run build && npm run test && npm run lint
Filosofía de testing
- Los test loops buscan edge cases activamente: datos vacíos, encoding, timezone, errores de red, tipos incorrectos
- Si un test descubre un bug → ARREGLAR el código en el mismo loop, no skipear el test
- Cada bug arreglado por un test → agregar un test de regresión al unit test correspondiente
- Target: 120+ tests al final del proyecto
- Tests de performance para routing: < 2s con red completa, < 5s con 500 paradas
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.
- 9d ago First seen · 48 lines · 511 tokens per session scan A 482d105b9fa7
mcp-stm-montevideo CLAUDE.md is an instructions file published in the GitHub repository chaba11/mcp-stm-montevideo (1 stars, last pushed 6mo ago), licensed MIT. It adds 511 tokens to every session, about $0.0026 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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