Borrowing it
Nothing to install: this file belongs to dorukardahan/domain-search-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/dorukardahan/domain-search-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/dorukardahan/domain-search-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/dorukardahan/domain-search-mcp/claude-md)<a href="https://agentmods.dev/instructions/dorukardahan/domain-search-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/dorukardahan/domain-search-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/dorukardahan/domain-search-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/dorukardahan/domain-search-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 | $0.01129 | $0.01129 |
| Opus 5.5 | $0.00452 | $0.00452 |
| Sonnet 5.5 | $0.00226 | $0.00226 |
| Haiku 4.5 | $0.00113 | $0.00113 |
Grade A, and why
domain-search-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 1mo 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 — 139 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.
Build & Development Commands
npm run build # Compile TypeScript to dist/
npm run dev # Watch mode with tsx
npm start # Run compiled server
npm test # Run all tests
npm run test:unit # Run unit tests only
npm run coverage # Run tests with coverage
Run a single test file:
npx jest tests/unit/cache.test.ts
npx jest --testPathPattern="validators"
Architecture Overview
This is an MCP (Model Context Protocol) server for domain availability searches. It aggregates data from multiple registrars and fallback sources.
Core Flow
server.ts (MCP Server)
↓
tools/*.ts (Tool definitions + executors)
↓
services/domain-search.ts (Orchestration layer)
↓
registrars/*.ts (API adapters) → Porkbun, Namecheap
or
services/pricing-api.ts (Backend for pricing + availability correction)
or
fallbacks/*.ts (RDAP, WHOIS)
Key Components
Tools (src/tools/): Each MCP tool has three exports:
*Tool: Tool definition (name, description, schema)*Schema: Zod validation schemaexecute*: Execution function
Registrar Adapters (src/registrars/): All extend RegistrarAdapter base class which provides:
- Token bucket rate limiting
- Retry with exponential backoff
- Timeout handling
- Standardized
DomainResultcreation
Domain Search Service (src/services/domain-search.ts): Orchestrates source selection:
- RDAP (fast, public registry data) - availability check
- Pricing API backend (if
PRICING_API_BASE_URLset) - pricing + availability correction - Porkbun API (if BYOK keys configured)
- Namecheap API (if BYOK keys configured)
- WHOIS (last resort fallback)
Important: Backend's Porkbun response overrides RDAP false positives.
Utilities (src/utils/):
cache.ts: TTL-based in-memory cache with type-specific TTLsredis-cache.ts: Hybrid Redis + in-memory cache with circuit breaker failovercircuit-breaker.ts: Circuit breaker pattern for external service resilienceadaptive-concurrency.ts: Dynamic concurrency/batch sizing based on latencymetrics.ts: Prometheus-compatible metrics (cache stats, latency histograms)errors.ts: Structured error types with retry hintspremium-analyzer.ts: Domain quality scoring and premium detectionsemantic-engine.ts: AI-powered domain name generation with keyword expansion
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.
- 1mo ago First seen · 139 lines · 1,129 tokens per session scan A 17d3af5aa969
domain-search-mcp CLAUDE.md is an instructions file published in the GitHub repository dorukardahan/domain-search-mcp (28 stars, last pushed 21d ago), licensed MIT. It adds 1,129 tokens to every session, about $0.0045 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.
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