What is trello-mcp-server CLAUDE.md?

Project instructions for a cloud service that lets Claude manage Trello boards, where teams organise work on cards and lists.

It helps developers configure, deploy, verify, and continue work on a Trello integration built with Python and FastMCP.

It documents the service status, deployment setup, required secrets, and remaining tasks in one place.

How sens8tion/trello-mcp-server configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to sens8tion/trello-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/sens8tion/trello-mcp-server/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/sens8tion/trello-mcp-server

Made for: Claude Code.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/sens8tion/trello-mcp-server/claude-md/github.svg)](https://agentmods.dev/instructions/sens8tion/trello-mcp-server/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/sens8tion/trello-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/sens8tion/trello-mcp-server/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/sens8tion/trello-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/sens8tion/trello-mcp-server/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 692 This file is loaded in full into every session.

When invoked 692 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00692	$0.00692
Opus 5.5	$0.00277	$0.00277
Sonnet 5.5	$0.00138	$0.00138
Haiku 4.5	$0.00069	$0.00069

Measured 2mo ago against content hash 9ee2aceb06f2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

trello-mcp-server 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 2mo 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.

CLAUDE.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

trello-mcp-server

Cloud-hosted MCP server exposing Trello as tools for Claude. Replaces the manual snapshot → propose → apply workflow in the main working area repo.

What this is

Claude calls this server directly over HTTP/SSE to read and mutate Trello boards in real time. No more snapshot files, no more pending.sh.

Stack: Python · FastMCP · Fly.io (lhr) · GitHub Actions CI/CD

Status

Repo scaffolded and pushed
Fly.io account created
flyctl launch --no-deploy run in this repo
Fly secrets set (TRELLO_API_KEY, TRELLO_TOKEN, MCP_AUTH_TOKEN)
FLY_API_TOKEN added as GitHub repo secret (for CD)
First deploy succeeded
Registered in Claude MCP config → tools verified working

Next steps (in order)

Copy .env.example → .env and fill in TRELLO_API_KEY, TRELLO_TOKEN, MCP_AUTH_TOKEN
Oak creates Fly.io account and installs flyctl
In this repo: flyctl launch --no-deploy (creates the app on Fly, writes app name into fly.toml)
Push secrets to Fly: bash set-fly-secrets.sh (reads from .env, never exposes values in shell history)
Add FLY_API_TOKEN to GitHub repo secrets (Settings → Secrets → Actions)
Push any change to main → CI runs → deploys automatically
Add to Claude MCP config (see README for snippet)
Test each tool from Claude

Project layout

server.py                      # FastMCP server — all tools defined here
fly.toml                       # Fly.io deploy config
set-fly-secrets.sh             # Reads .env and pushes secrets to Fly
requirements.txt               # Runtime deps
requirements-dev.txt           # + lint/test deps
tests/test_server.py           # Smoke tests
.github/workflows/ci.yml       # Lint + test on push/PR
.github/workflows/deploy.yml   # Deploy to Fly on merge to main

Conventions

Never commit secrets — all credentials go in Fly secrets or .env (gitignored)
Prefer archive_card over delete — archive is reversible; there is no delete tool by design
Auth — every request must carry Authorization: Bearer <MCP_AUTH_TOKEN>
Trello calls use query params, not JSON body — matches Trello API convention (see _post/_put helpers)
Transport — HTTP + SSE (mcp.run(transport="sse")); do not switch to stdio

Read the full file on GitHub · 71 lines

Changes

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.

2mo ago First seen · 71 lines · 692 tokens per session scan A 9ee2aceb06f2

Subscribe to this mod's changes

trello-mcp-server CLAUDE.md is an instructions file published in the GitHub repository sens8tion/trello-mcp-server (0 stars, last pushed 8mo ago), licensed MIT. It adds 692 tokens to every session, about $0.0028 per session on Opus 5.5. 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.

Project management

trello-mcp-server CLAUDE.md next to 6 instructions from other repositories
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trello-mcp-server CLAUDE.mdsens8tion/trello-mcp-server	Instructions file	0	8mo ago	MIT	A	692	Claude Code
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trello-mcp-server: Instructions file for Claude Code