What is fastn-mcp CLAUDE.md?

Project instructions for fastn-mcp, a tool or server from the fastn-ai/fastn-mcp project. They also specify how commits should be written.

Working on fastn-mcp while following its project guidance and commit style.

They give the coding agent project-specific rules, including not adding Co-Authored-By lines to commit messages.

How fastn-ai/fastn-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to fastn-ai/fastn-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.

Copy the file

curl -O https://raw.githubusercontent.com/fastn-ai/fastn-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/fastn-ai/fastn-mcp

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/fastn-ai/fastn-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/fastn-ai/fastn-mcp/claude-md)

Your own site

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

Your own site · 80×15

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

Per session 150 This file is loaded in full into every session.

When invoked 150 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	$0.00150	$0.00150
Opus 5.5	$0.00060	$0.00060
Sonnet 5.5	$0.00030	$0.00030
Haiku 4.5	$0.00015	$0.00015

Measured 2d ago against content hash 90e17f566570, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fastn-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 2d 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 · 9 lines

What it actually says

fastn-mcp

This repository is documentation only. It points to the Fastn MCP Gateway (Fastn Connect): endpoint https://mcp.fastn.dev/<org>, docs at https://connect.fastn.dev/docs. The docs at connect.fastn.dev are the source of truth; update the README from them, never the other way round.

Do not recommend https://mcp.live.fastn.ai, pip install fastn-mcp-server, or the find_tools / execute_tool / flow tools: they are the retired v1 server, kept on the v1 branch for reference only.

Commit style

Never add Co-Authored-By trailers to commit messages

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.

2d ago Changed · +4 lines · +124 tokens per session 90e17f566570
2mo ago First seen · 5 lines · 26 tokens per session scan A 53dbb903ed62

Subscribe to this mod's changes

fastn-mcp CLAUDE.md is an instructions file published in the GitHub repository fastn-ai/fastn-mcp (23 stars, last pushed 3d ago), licensed MIT. It adds 150 tokens to every session, about $0.0006 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 2026-08-30.

LLM ai-agents fastn integrations mcp model-context-protocol

fastn-mcp CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
fastn-mcp CLAUDE.mdfastn-ai/fastn-mcp	Instructions file	23	3d ago	MIT	A	150	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

fastn-mcp: Instructions file for Claude Code