Borrowing it
Nothing to install: this file belongs to playbattlegrid/battlegrid-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/playbattlegrid/battlegrid-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/playbattlegrid/battlegrid-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/playbattlegrid/battlegrid-mcp/agents-md)<a href="https://agentmods.dev/instructions/playbattlegrid/battlegrid-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/playbattlegrid/battlegrid-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.
<a href="https://agentmods.dev/instructions/playbattlegrid/battlegrid-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/playbattlegrid/battlegrid-mcp/agents-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 | $0.01961 | $0.01961 |
| Opus 5 | $0.00981 | $0.00981 |
| Sonnet 5 | $0.00392 | $0.00392 |
| Haiku 4.5 | $0.00196 | $0.00196 |
Grade A, and why
battlegrid-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 3d 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 — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — BattleGrid MCP Server
Machine-readable agent discovery file for @battlegrid/mcp-server (thin stdio proxy to BattleGrid's remote MCP server).
Platform
| Field | Value |
|---|---|
| Name | BattleGrid |
| Website | https://battlegrid.trade |
| Protocol | Model Context Protocol (MCP) |
| Transport | stdio (npm package), streamable-http (remote) |
| Package version | The proxy's own build identity. It makes no claim about the server's contract and never needs to move when the contract does. |
| Contract version | Relayed from the upstream handshake on every connection, so it is always the contract you will actually reach. Read it from the stdio handshake (battlegrid@<contract>, printed to stderr at startup) or GET https://mcp.battlegrid.trade/mcp/version. The two versions differ by design — that is not drift. |
Authentication
| Field | Value |
|---|---|
| Method | OAuth 2.1 with Dynamic Client Registration (default, remote) / API key (fallback — headless, no remote transport, or multi-account). Authentication is a property of the PATH, not of the client. |
| Format | bg_live_* (API key path only) |
| Header | Authorization: Bearer <API_KEY> (API key path only; OAuth carries its own token) |
| Obtain | OAuth needs nothing to obtain — authorize in the browser. For a key: https://battlegrid.trade → Profile → MCP tab |
| Scopes | mcp:read (discovery + non-financial config writes), mcp:wager (financial actions) |
Connection
Option A: Remote / streamable-http over OAuth — the default
URL: https://mcp.battlegrid.trade/mcp
Register the URL on a streamable-http transport and authorize: the client registers itself by Dynamic Client Registration and BattleGrid's consent page opens in the browser. No npm package, no API key. Grants are listed and revocable under Profile → MCP → OAuth Sessions.
Option B: API key — headless, no remote transport, or multi-account
Use a key when the runtime cannot open a browser to consent, when the client speaks stdio only, or when one process drives several BattleGrid accounts (OAuth grants one account each).
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.
- 3d ago Changed · +9 lines · +255 tokens per session 53d985d08108
- 5d ago Changed · +11 lines · +409 tokens per session a88d7ed0e075
- 9d ago First seen · 81 lines · 1,297 tokens per session scan A 4ede5627b906
battlegrid-mcp AGENTS.md is an instructions file published in the GitHub repository playbattlegrid/battlegrid-mcp (0 stars, last pushed 2d ago), licensed MIT. It adds 1,961 tokens to every session, about $0.0098 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.
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