Borrowing it
Nothing to install: this file belongs to moureauf/boe-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/moureauf/boe-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/moureauf/boe-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/moureauf/boe-mcp/claude-md)<a href="https://agentmods.dev/instructions/moureauf/boe-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/moureauf/boe-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.
<a href="https://agentmods.dev/instructions/moureauf/boe-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/moureauf/boe-mcp/claude-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 | $0.00880 | $0.00880 |
| Opus 5 | $0.00440 | $0.00440 |
| Sonnet 5 | $0.00176 | $0.00176 |
| Haiku 4.5 | $0.00088 | $0.00088 |
Grade A, and why
boe-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 9d 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 — 79 lines — stays where its author put it; the contents beside it link to each section on GitHub.
boe-mcp
TypeScript MCP server for Bank of England data: base rate (current, history,
stats, historical lookup), any IADB statistical series (SONIA, exchange
rates, mortgage rates), and MPC meeting dates. Published to npm as boe-mcp.
Commands
npm run build— compile TypeScript todist/npm run dev— watch modenpm start— run the servernpm test— unit tests (no network)npm run test:live— integration smoke test against real BoE endpointsnpm run lint— check formatting/lint rules (Biome)npm run lint:fix— apply Biome fixes
Architecture
Claude Code → MCP Server (stdio by default; opt-in Streamable HTTP) → in-memory TTL cache → BoE IADB API
No auth required. All data from public BoE endpoints.
Transports: stdio is the default. HTTP mode is opt-in via --http [port] or
BOE_MCP_HTTP_PORT (bind host BOE_MCP_HTTP_HOST, default 127.0.0.1) and runs
the SDK's StreamableHTTPServerTransport statelessly — a fresh server per POST.
Project structure
src/ index.ts # thin entry point: transport selection (stdio vs --http) server.ts # createServer(): tool registration (x-release-please-version marker lives here) http.ts # opt-in Streamable HTTP transport (stateless), /mcp + /healthz boe-client.ts # BoE API calls + CSV/HTML parsing cache.ts # generic TTL cache data.ts # shared cached accessors used by the tools series-catalog.ts # curated IADB series catalog + lookup (for list_series) tools/ current-rate.ts rate-history.ts rate-at.ts rate-stats.ts next-meeting.ts mpc-dates.ts list-series.ts get-series.ts test/ # vitest tests + fixtures (test/live/ hits the network) docs/specs/design.md # full design spec — read this first
Tools exposed
| Tool | Description |
|---|---|
get_current_rate |
Current base rate, effective date, months held |
get_rate_history |
Last N rate changes with basis points (default 10) |
get_rate_at |
Base rate in force on a given historical date |
get_rate_stats |
Min/max/time-weighted average, start/end rates and net bps move over a date range |
get_next_mpc_meeting |
Date of next MPC meeting and days until it |
get_mpc_dates |
All upcoming MPC announcement dates with days until each |
list_series |
Curated catalog of well-known IADB series (code, name, description, unit, frequency) |
get_series |
Observations for any IADB series by code, with optional from/to dates and limit |
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.
- 9d ago First seen · 79 lines · 880 tokens per session scan A 345c6f738abc
boe-mcp CLAUDE.md is an instructions file published in the GitHub repository moureauf/boe-mcp (2 stars, last pushed yesterday), licensed MIT. It adds 880 tokens to every session, about $0.0044 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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