What is mcp AGENTS.md?

Instructions for developing the Space Frontiers MCP server, a service that searches academic papers, books, patents, Wikipedia, Reddit, Telegram, and YouTube transcripts. MCP is a standard way for AI tools to call external services.

Use them when working on the server, its search tools, authentication, API client, prompts, or registry configuration.

They give contributors the server's purpose, file layout, development conventions, and the behavior of its read-only search tools.

How SpaceFrontiers/mcp configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to SpaceFrontiers/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/SpaceFrontiers/mcp/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/SpaceFrontiers/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/spacefrontiers/mcp/agents-md/github.svg)](https://agentmods.dev/instructions/spacefrontiers/mcp/agents-md)

Your own site

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

Per session 684 This file is loaded in full into every session.

When invoked 684 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	$0.00684	$0.00684
Opus 5.5	$0.00274	$0.00274
Sonnet 5.5	$0.00137	$0.00137
Haiku 4.5	$0.00068	$0.00068

Measured 5d ago against content hash 384d656cea92, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 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.

AGENTS.md · 55 lines

How it starts

The opening of the file, as written. The whole thing — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md — Machine Library MCP server

This is the source for the Machine Library MCP server, deployed at https://mcp.machinelibrary.ai/.

What it does

Exposes three read-only, idempotent tools that wrap the Machine Library search API:

machinelibrary_search — papers, books, patents, standards, Wikipedia, YouTube transcripts, Reddit, Telegram channels, Discord
machinelibrary_fetch_document — full text + references for one canonical URI
machinelibrary_search_in_document — passages within one document by query

All tool returns are typed Pydantic models — outputSchema and structuredContent are auto-generated by FastMCP. Every result carries a canonical source_uri for citation.

Layout

mcp_server.py — Starlette + FastMCP entrypoint, OAuth well-known endpoints.
tools.py — tool definitions and Pydantic output schemas.
prompts.py — deep_research_agent prompt.
auth.py — Bearer-token validation against users-api, Origin allowlist, MCP-Protocol-Version allowlist.
client.py — async HTTP client for the v2 search API.
server.json — entry for the Official MCP Registry (registry.modelcontextprotocol.io).
smithery.yaml — Smithery deployment config.
registry.json — legacy in-house registry metadata.
tests/ — pytest unit tests for each tool.

Local dev

uv sync
uv run pytest
uv run fastmcp run mcp_server.py

The hosted endpoint expects Authorization: Bearer <key> and validates the token against users-api. Stdio/self-hosted use reads MACHINELIBRARY_API_KEY (or the older SPACE_FRONTIERS_API_KEY) for upstream API authentication.

Conventions

Python 3.10+. Single quotes (ruff format). Type hints everywhere.
All tool descriptions follow the "Use when / Do not use when / Examples" template; lead with verb + scope.
Every tool has readOnlyHint: true and idempotentHint: true annotations — required for the Anthropic Connectors Directory.
Tool names are prefixed machinelibrary_ to avoid collisions in multi-server agent setups.
The MCP spec versions this server speaks are listed in auth.py:SUPPORTED_PROTOCOL_VERSIONS. Bump there when adopting a new revision.

Read the full file on GitHub · 55 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.

5d ago Changed · -1 lines · -10 tokens per session 384d656cea92
29d ago Changed · +1 lines · +15 tokens per session 6df8d5040eb6
1mo ago Changed e6d715e782cd
1mo ago Changed b541ad9ef87f
2mo ago First seen · 55 lines · 679 tokens per session scan A 3648ff18eb9f

Subscribe to this mod's changes

mcp AGENTS.md is an instructions file published in the GitHub repository SpaceFrontiers/mcp (11 stars, last pushed 6d ago), licensed MIT. It adds 684 tokens to every session, about $0.0027 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.

Research academic-search ai-agents llm-tools mcp model-context-protocol oauth2

mcp AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp AGENTS.mdSpaceFrontiers/mcp	Instructions file	11	6d ago	MIT	A	684	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

mcp: Instructions file for Codex