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fred-mcp: Instructions file for Claude Code

CLAUDE.md

fred-mcp CLAUDE.md is an instructions file for Claude Code from mcpwright/fred-mcp. It costs 884 tokens per session, scanned A, original, MIT.

Repository instructions for fred-mcp, a server in the mcpwright suite that connects an AI agent to the Federal Reserve Bank of St. Louis FRED data service. They define rules for API keys, caching, data handling, and required notices.

In plain words
What is it for?
They guide development of live FRED data access, temporary caching, missing-key handling, logging, and compliance documentation.
Why use it?
They help maintain the server without exposing users’ FRED API keys, bulk-copying third-party data, or violating the service’s terms of use.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: reads .claude/ paths; mentions subagents.

This is mcpwright/fred-mcp's own configuration. It tells Claude Code how to work on fred-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything fred-mcp configures →

not rated 0repo 2mo ago A scan 884 tokens original MIT
View source ↗ mcpwright/fred-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to mcpwright/fred-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/mcpwright/fred-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/mcpwright/fred-mcp

Made for: Claude Code.

Wrote this? Show the measurements

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Per session 884 This file is loaded in full into every session.
When invoked 884 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00884 $0.00884
Opus 5.5 $0.00354 $0.00354
Sonnet 5.5 $0.00177 $0.00177
Haiku 4.5 $0.00088 $0.00088

Measured 2mo ago against content hash ea56844f3ccf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

fred-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 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.

CLAUDE.md · 57 lines

How it starts

The opening of the file, as written. The whole thing — 57 lines — stays where its author put it; the contents beside it link to each section on GitHub.

fred-mcp — working agreement

fred-mcp is server #4 of the mcpwright suite (github.com/mcpwright): polished, public MCP servers that bring a real-world data source into any agent. It follows the bar set by edgar-mcp (the reference server) and builds on mcpwright-core.

The full written rubric is ~/my-notes/professional-self-improvement/mcpwright/mcp-standards.md. The design doc is ~/my-notes/professional-self-improvement/mcpwright/fred-mcp-plan.md.

Non-negotiable policies

  • FRED ToU compliance (this repo's special constraint — full review in the design doc):
    • No bulk mirroring. Live API + TTL cache only; never persist FRED data to disk.
    • BYO key. The user's own free FRED_API_KEY; never ship or embed a key; fail fast pre-network (MissingKeyError). The key is a query param — it must never appear in error messages, logs, or anything the model sees.
    • The disclaimer ("This product uses the FRED® API but is not endorsed or certified by the Federal Reserve Bank of St. Louis.") stays in the server instructions, README, and (at publish time) the MCPB manifest.
    • Copyright pass-through. Third-party series notes are returned verbatim, never stripped; the copyrighted flag stays accurate.
  • Lots of unit tests. Every tool and every formatter has tests, with all external I/O mocked (respx). A new tool ships with its tests in the same PR.
  • Use the latest patterns. Official mcp Python SDK via mcp.server.fastmcp (NOT the standalone fastmcp package). Python 3.12+ idioms, from __future__ import annotations, pydantic v2 models with a Field(description=...) on every field, uv, async httpx via mcpwright_core.AsyncHttpClient. Tools return typed pydantic models and are annotated readOnlyHint=True.
  • Honest tool surfaces. Descriptions carry the caveats that change interpretation (revisions exist; vintage coverage varies; '.' means missing; truncation is flagged, never silent). Measured rationale: devender.me/2026/06/10/tool-descriptions-measured/.
  • PR per change, CI-gated. Standard flow: feature branch → code → code-review subagent → fold in findings → PR → CI green → squash-merge.
    • Code-review subagent: before opening the PR, review the diff with the code-reviewer subagent (.claude/agents/code-reviewer.md) — or run /review-pr. Address Blocker/High (with a regression test for any real bug) before the PR opens.
    • Merge: Code Quality & Tests green and branch up to date → squash-merge with a (#N) suffix. main is branch-protected; no direct pushes.
  • Green locally before pushing: 
    uv run ruff check src/ && uv run ruff format --check src/ && uv run mypy && uv run pytest -v

Read the full file on GitHub · 57 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.

  1. 2mo ago First seen · 57 lines · 884 tokens per session scan A ea56844f3ccf

Subscribe to this mod's changes

fred-mcp CLAUDE.md is an instructions file published in the GitHub repository mcpwright/fred-mcp (0 stars, last pushed 2mo ago), licensed MIT. It adds 884 tokens to every session, about $0.0035 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.

Analytics and metricsFREDFinance and fintechalfredclaudeeconomicsfederal-reservemcp
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