What is xkcd-mcp AGENTS.md?

An agent guide for xkcd-mcp, a small server that provides xkcd comics through the official xkcd JSON API. An API is a structured way for software to request data.

Use it when maintaining the xkcd server, adding or adjusting operations for current, numbered, or random comics, or working with its command-line and HTTP modes.

It explains the project’s entry point, response format, supported connection methods, and installation documentation, helping changes follow the existing design.

How sandraschi/xkcd-mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to sandraschi/xkcd-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/sandraschi/xkcd-mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/sandraschi/xkcd-mcp

Made for: Codex, OpenCode.

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/sandraschi/xkcd-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/sandraschi/xkcd-mcp/agents-md)

Your own site

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

Per session 220 This file is loaded in full into every session.

When invoked 220 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	$0.00220	$0.00220
Opus 5.5	$0.00088	$0.00088
Sonnet 5.5	$0.00044	$0.00044
Haiku 4.5	$0.00022	$0.00022

Measured 2mo ago against content hash bf878b1260ce, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

xkcd-mcp AGENTS.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.

AGENTS.md · 21 lines

What it actually says

xkcd-mcp — Agent Guide

Overview

FastMCP 3.2 xkcd server — official JSON API only (current / by number / random), no HTML scraping.

Entry Points

uv run xkcd-mcp → xkcd_mcp.__main__:main

Standards

FastMCP 3.2+ portmanteau tool pattern — tools use operation enum param
Responses: structured dicts with success, message, domain-specific fields
Dual transport: stdio (Claude Desktop) + HTTP (MCP_TRANSPORT=http)
See mcp-central-docs for fleet-wide coding standards

Key Files

README.md — full documentation
pyproject.toml — build config and entry points
CLAUDE.md — Claude Code context (if present)

Install docs: follow mcp-central-docs/standards/AGENT_INSTALL_REFERENCE.md

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 · 21 lines · 220 tokens per session scan A bf878b1260ce

Subscribe to this mod's changes

xkcd-mcp AGENTS.md is an instructions file published in the GitHub repository sandraschi/xkcd-mcp (2 stars, last pushed yesterday), licensed MIT. It adds 220 tokens to every session, about $0.0009 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.

mcp-server webapp xkcd

xkcd-mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
xkcd-mcp AGENTS.mdsandraschi/xkcd-mcp	Instructions file	2	yesterday	MIT	A	220	Codex, OpenCode
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

xkcd-mcp: Instructions file for Codex