Borrowing it
Nothing to install: this file belongs to chrischall/flightaware-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/chrischall/flightaware-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/chrischall/flightaware-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/chrischall/flightaware-mcp/claude-md)<a href="https://agentmods.dev/instructions/chrischall/flightaware-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/chrischall/flightaware-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/chrischall/flightaware-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/chrischall/flightaware-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 | $0.01641 | $0.01641 |
| Opus 5.5 | $0.00656 | $0.00656 |
| Sonnet 5.5 | $0.00328 | $0.00328 |
| Haiku 4.5 | $0.00164 | $0.00164 |
Grade A, and why
flightaware-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 yesterday.
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 — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md — flightaware-mcp
Guidance for Claude working in this repo.
TL;DR
FlightAware AeroAPI (v4) MCP server. Wraps the AeroAPI REST API
(https://aeroapi.flightaware.com/aeroapi) and exposes 34 tools (incl. fa_healthcheck) to Claude over
stdio: flight lookup/search/positions/count/track/position/route/map/history/
canonical, airport boards + counts + routes + delays + weather + nearby +
canonical, operators, aircraft owner, scheduled flights, Foresight predictive
search, and flight-alert management.
Auth is an AeroAPI key (AEROAPI_API_KEY) sent in the x-apikey header —
AeroAPI does not use Authorization: Bearer. This is the bearer/direct-API
archetype: reads go through the fleet-shared createApiClient (configured with
a non-Bearer tokenHeader); mutations go through write(), which uses the same
client's fetchRaw because AeroAPI returns the new-resource id in the Location
header on create and an empty body on delete (neither fits a JSON-only client) —
so writes share the timeout, cancellation, 429 retry and 401/429 messages. No fetchproxy.
Environment
AEROAPI_API_KEY=<key> # Required. Create at https://www.flightaware.com/aeroapi/portal/
AEROAPI_OUTPUT_DIR=<dir> # Optional. Where flight-map PNGs are written (default: ~/Downloads/flightaware-mcp); a per-call output_dir must be inside it
AEROAPI_CACHE_TTL=<secs> # Optional. Live-data read-cache TTL (default 15; 0 disables)
AEROAPI_STATIC_CACHE_TTL=<secs> # Optional. Reference-data read-cache TTL (default 3600; 0 disables)
MCP_CONFIRM_MODE=<mode> # Optional. ask-user|auto|refuse for writes on clients without prompts (default ask-user; unrecognised = refuse)
MCP_CONFIRM_ELICITATION=<on|off> # Optional. off: never prompt; every client takes the MCP_CONFIRM_MODE path (for clients whose prompt never shows, e.g. opencode 2.0.x)
MCP_CONFIRM_TTL_SECONDS=<secs> # Optional. confirmToken lifetime (default 600)
MCP_CONFIRM_SECRET=<secret> # Optional. Token signing key (default random per process; set to survive restarts)
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.
- yesterday Changed · +3 lines · +66 tokens per session cfba81959934
- 21d ago Changed · +2 lines · +134 tokens per session 5de1b26201c5
- 28d ago Changed · +1 lines · +45 tokens per session cc06e8ae3b9e
- 29d ago Changed · +1 lines · +57 tokens per session 5b903f39e339
- 1mo ago Changed · +24 tokens per session b0c5fe73b7c3
- 1mo ago Changed · +8 lines · +185 tokens per session 7d296433fdb9
- 2mo ago First seen · 71 lines · 1,130 tokens per session scan A 57570039d8b2
flightaware-mcp CLAUDE.md is an instructions file published in the GitHub repository chrischall/flightaware-mcp (1 stars, last pushed 2d ago), licensed MIT. It adds 1,641 tokens to every session, about $0.0066 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.
flightaware-mcp CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| flightaware-mcp CLAUDE.mdchrischall/flightaware-mcp | Instructions file | 1 | 2d ago | MIT | A | 1,641 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |