Borrowing it
Nothing to install: this file belongs to fieldcure/fieldcure-mcp-publicdata. 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/fieldcure/fieldcure-mcp-publicdata/main/CLAUDE.mdgit clone --depth 1 https://github.com/fieldcure/fieldcure-mcp-publicdataWrote 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/fieldcure/fieldcure-mcp-publicdata/claude-md)<a href="https://agentmods.dev/instructions/fieldcure/fieldcure-mcp-publicdata/claude-md"><img src="https://agentmods.dev/badge/instructions/fieldcure/fieldcure-mcp-publicdata/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/fieldcure/fieldcure-mcp-publicdata/claude-md"><img src="https://agentmods.dev/badge/instructions/fieldcure/fieldcure-mcp-publicdata/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 | $0.02058 | $0.02058 |
| Opus 5 | $0.01029 | $0.01029 |
| Sonnet 5 | $0.00412 | $0.00412 |
| Haiku 4.5 | $0.00206 | $0.00206 |
Grade A, and why
fieldcure-mcp-publicdata 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 8d 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 — 145 lines — stays where its author put it; the contents beside it link to each section on GitHub.
FieldCure.Mcp.PublicData.Kr
MCP server that bridges LLM clients to 80,000+ Korean public data APIs on
data.go.kr. Distributed as a .NET tool
(fieldcure-mcp-publicdata-kr) and NuGet package
(FieldCure.Mcp.PublicData.Kr).
Solution layout
src/FieldCure.Mcp.PublicData.Kr/
├── Program.cs # stdio MCP server entry point (no startup hard-fail)
├── Services/
│ ├── ApiKeyResolver.cs # env var → Elicitation → soft-fail chain + session cache
│ ├── InvalidApiKeyException.cs # Signals upstream auth rejection (401/403 or body)
│ ├── KeyedCall.cs # resolve → run → invalidate → retry helper
│ ├── PublicDataHttpClient.cs # HTTP proxy with serviceKey injection
│ ├── DomainWhitelist.cs # SSRF prevention via host whitelist
│ ├── ResponseNormalizer.cs # XML → JSON normalization, EUC-KR support
│ └── ErrorCodeMapper.cs # Korean guidance for data.go.kr result codes
└── Tools/
├── DiscoverApiTool.cs # discover_api
├── DescribeApiTool.cs # describe_api
└── CallApiTool.cs # call_api
tests/FieldCure.Mcp.PublicData.Kr.Tests/ # MSTest — DomainWhitelist, ErrorCodeMapper, ResponseNormalizer
Build & test
dotnet build # build the project
dotnet test # run MSTest suite
pwsh scripts/publish-nuget.ps1 # pack → sign (EV dongle) → push
pwsh scripts/publish-nuget.ps1 -SkipSign -SkipPush # local pack only
publish-nuget.ps1 expects a Fieldcure GlobalSign code-signing cert on the USB dongle and a
NUGET_API_KEY env var (or -NuGetApiKey). Never bypass signing unless explicitly asked.
Credential model (ADR-001)
This repo is the Phase 1 pilot for ADR-001 MCP Credential Management. The principles below must hold for any future change; they also apply verbatim to the Phase 2 (Essentials v2.1) and Phase 3 (Outbox v2.0) rollouts.
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.
- 8d ago First seen · 145 lines · 2,058 tokens per session scan A 25faa83d3203
fieldcure-mcp-publicdata CLAUDE.md is an instructions file published in the GitHub repository fieldcure/fieldcure-mcp-publicdata (0 stars, last pushed 3mo ago), licensed MIT. It adds 2,058 tokens to every session, about $0.0103 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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