Borrowing it
Nothing to install: this file belongs to musictechlab/mtl-trello-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/musictechlab/mtl-trello-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/musictechlab/mtl-trello-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/musictechlab/mtl-trello-mcp/claude-md)<a href="https://agentmods.dev/instructions/musictechlab/mtl-trello-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/musictechlab/mtl-trello-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/musictechlab/mtl-trello-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/musictechlab/mtl-trello-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 | $0.00348 | $0.00348 |
| Opus 5 | $0.00174 | $0.00174 |
| Sonnet 5 | $0.00070 | $0.00070 |
| Haiku 4.5 | $0.00035 | $0.00035 |
Grade A, and why
mtl-trello-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.
What it actually says
mtl-trello-mcp
MCP server for Trello project management.
Tech Stack
- Language: Python 3.10+
- Package manager: Poetry
- MCP framework: FastMCP (
mcp[cli]) - Linter: Ruff
- Test framework: Pytest
Commands
| Action | Command |
|---|---|
| Install | poetry install |
| Test | poetry run pytest |
| Lint | poetry run ruff check . |
| Format | poetry run ruff format . |
| Run | poetry run python -m mtl_trello_mcp |
Architecture
src/mtl_trello_mcp/server.py— MCP server with all tool definitionssrc/mtl_trello_mcp/__main__.py— Entry point- Trello API access via
TRELLO_API_KEYandTRELLO_TOKENenv vars
Environment Variables
| Variable | Purpose | Required |
|---|---|---|
TRELLO_API_KEY |
Trello Power-Up API key | Yes |
TRELLO_TOKEN |
Trello API token | Yes |
TRELLO_UPLOAD_DIR |
Allowed root for attachment uploads (defaults to ~) |
No |
TRELLO_ALLOW_HIDDEN |
Set to 1 to allow hidden path components (dotfiles/dotdirs) in uploads |
No |
TRELLO_MAX_UPLOAD_MB |
Max attachment upload size in MB (defaults to 50) |
No |
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 · 38 lines · 348 tokens per session scan A 4c686f8f1391
mtl-trello-mcp CLAUDE.md is an instructions file published in the GitHub repository musictechlab/mtl-trello-mcp (1 stars, last pushed 2mo ago), licensed MIT. It adds 348 tokens to every session, about $0.0017 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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