Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/xerno42/helldivers2-mcp/claude-mdgit clone --depth 1 https://github.com/xerno42/helldivers2-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/xerno42/helldivers2-mcp/claude-md)<a href="https://agentmods.dev/instructions/xerno42/helldivers2-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/xerno42/helldivers2-mcp/claude-md.svg" alt="Measured on agentmods" 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 | $0.01234 | $0.01234 |
| Opus 5 | $0.00617 | $0.00617 |
| Sonnet 5 | $0.00247 | $0.00247 |
| Haiku 4.5 | $0.00123 | $0.00123 |
Grade A, and why
helldivers2-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 5d 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.
How it starts
The opening of the file, as written. The whole thing — 99 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
What This Is
A standalone MCP server that exposes live Helldivers 2 galactic war data to LLMs. It uses the stateless Streamable HTTP transport: each POST /mcp request spins up a fresh McpServer + transport pair, handles the request, and tears them down. There is no session state.
The upstream data source is the community API at https://api.helldivers2.dev. A GET /health endpoint is also served for liveness checks.
Development Commands
npm run dev # tsx watch — hot reload
npm run build # tsc → dist/
npm run start # node dist/index.js (after build)
npm run lint # eslint src
npm run test # Jest (ESM mode via --experimental-vm-modules)
npm run test:watch
npm run test:coverage
Run a single test file:
npm run test src/__tests__/tools.war.test.ts
Architecture
src/
index.ts — Express app, MCP server factory, request routing, origin guard, incoming rate limiter
client.ts — hd2Fetch(): in-memory cache + rate-limit queue over api.helldivers2.dev
rate-limit.ts — createRateLimiter(): token-bucket middleware for incoming /mcp requests (per-IP)
reference-data.ts — reads json/ files at startup, exposes lookup helpers
format-planet.ts — loadWarSnapshot() (fetches 3 endpoints in parallel), formatPlanetDetails(), formatActivePlanetSummary()
tool-types.ts — Tool / ToolDefinition / ToolResult / ToolHandler interfaces
utils.ts — textResponse(), errorResponse(), stripMarkup helpers, toRelativeTime()
enums.ts — game enum maps (Races, AssignmentTypes, difficulty levels, etc.)
api-types.ts — raw API response types (RawWarStatus, RawPlanetInfo, etc.)
tools/
war.ts — get_war_status
planets.ts — get_all_planets, get_planet_details
assignments.ts — get_assignments
news.ts — get_dispatches, get_steam_news
dss.ts — get_space_station_details
json/ — static reference data files (planets, biomes, factions, effects, items…)
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.
- 5d ago First seen · 99 lines · 1,234 tokens per session scan A 3b8819cdb051
helldivers2-mcp CLAUDE.md is an instructions file published in the GitHub repository xerno42/helldivers2-mcp (2 stars, last pushed 14d ago), licensed MIT. It adds 1,234 tokens to every session, about $0.0062 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.
Other instructions, from other repositories
Unity-MCP copilot-instructions.md
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Unity-MCP CLAUDE.md
Claude Code instructions for IvanMurzak/Unity-MCP, covering claude.md, what this is, build / run, project constitution and find detail in.
Unreal_mcp AGENTS.md
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Unreal_mcp copilot-instructions.md
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