Borrowing it
Nothing to install: this file belongs to AustinKelsay/nostr-mcp-server. 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/AustinKelsay/nostr-mcp-server/main/CLAUDE.mdgit clone --depth 1 https://github.com/AustinKelsay/nostr-mcp-serverWrote 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/austinkelsay/nostr-mcp-server/claude-md)<a href="https://agentmods.dev/instructions/austinkelsay/nostr-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/austinkelsay/nostr-mcp-server/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/austinkelsay/nostr-mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/austinkelsay/nostr-mcp-server/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 | $0.00727 | $0.00727 |
| Opus 5.5 | $0.00291 | $0.00291 |
| Sonnet 5.5 | $0.00145 | $0.00145 |
| Haiku 4.5 | $0.00073 | $0.00073 |
Grade A, and why
nostr-mcp-server 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.
How it starts
The opening of the file, as written. The whole thing — 76 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project Overview
This is a Model Context Protocol (MCP) server that provides Nostr capabilities to LLMs. It implements 17 tools for interacting with the Nostr network including profile management, note creation/publishing, zap handling, and NIP-19 entity conversion.
Built with snstr (lightweight TypeScript Nostr library) and the @modelcontextprotocol/sdk.
Common Commands
# Build the project (compiles TypeScript and sets executable permissions)
bun run build
# Run all tests
bun test
# Run a specific test file
bun test __tests__/basic.test.ts
# Start the MCP server
bun start
# Start with Node.js (runtime is dual-compatible)
npm run start:node
Architecture
Entry Point
index.ts- Main MCP server setup and tool registration. All 17 tools are registered here with their handlers.
Module Structure
Each feature area has its own directory with a *-tools.ts file containing:
- Zod schemas for tool configuration
- Core business logic functions
- Formatting helpers
| Directory | Purpose |
|---|---|
profile/ |
Keypair generation, profile creation/updates, authenticated note posting |
note/ |
Note creation, signing, publishing, anonymous posting, reading |
zap/ |
Zap receipt processing, anonymous zaps, LNURL handling |
utils/ |
Shared utilities (see below) |
Utils Module (utils/)
constants.ts-DEFAULT_RELAYS,QUERY_TIMEOUT,KINDSenumconversion.ts- NIP-19 encoding/decoding (npubToHex,hexToNpub)formatting.ts- Output formatting helperspool.ts-getFreshPool()for Nostr relay connectionsnip19-tools.ts- NIP-19 entity conversion and analysisephemeral-relay.ts- In-memory Nostr relay for testing
Key Patterns
- Each tool handler creates a fresh relay pool via
getFreshPool()and closes it in afinallyblock - Public keys accept both hex and npub formats - use
npubToHex()to normalize - Private keys accept both hex and nsec formats - use
normalizePrivateKey()helper - Tool configs use Zod schemas defined in each module's
*ToolConfigexports
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.
- 2mo ago First seen · 76 lines · 727 tokens per session scan A 8297ee3b1cc2
nostr-mcp-server CLAUDE.md is an instructions file published in the GitHub repository AustinKelsay/nostr-mcp-server (38 stars, last pushed 7mo ago), licensed MIT. It adds 727 tokens to every session, about $0.0029 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.
nostr-mcp-server CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| nostr-mcp-server CLAUDE.mdAustinKelsay/nostr-mcp-server | Instructions file | 38 | 7mo ago | MIT | A | 727 | Claude Code |
| 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 |