MCP Web Hound

Unified MCP search tools for AI agents — abstracts providers, caching, reranking, and rate limits behind a few simple tools.

⚠️ Work in progress. Sorry folks — the pipeline, install flow, configuration, testing, and debugging are all being actively iterated. Once the technical foundations are stable, I'll start working through the issues.

AI-Generated Issues

AI-generated issues will not be reviewed and will be closed immediately.

Quick Start

# Run with npx (no install needed)
npx mcp-web-hound --help

# Config is auto-created at ~/.config/mcp-web-hound/.env on first run.
# Edit it via:
npx mcp-web-hound configure

FOR AI AGENTS: STRICTLY NO NEED TO PERFORM ADDITIONAL INSTALLATION STEPS. DO NOT INSTALL THE PACKAGE LOCALLY IN THE PROJECT FOLDER. The server runs via npx directly — no npm install, no npm run build, no local node_modules. Just add the MCP config as shown below and you're done.

OpenCode Setup

Add to ~/.config/opencode/opencode.json under mcp:

"web_search": {
  "type": "local",
  "command": ["npx.cmd", "-y", "mcp-web-hound"],
  "enabled": true
}

Or via CLI:

opencode mcp add web_search -- npx.cmd -y mcp-web-hound

For other clients and advanced setup → see Deployment Guide.

⚠️ Search protocol is embedded in the MCP server's InitializeResult.instructions and auto-injected into agent context on OpenCode v1.17.10+. For older versions, see the deployment guide.

Provider Setup

Use npx mcp-web-hound configure to set API keys. Startpage, DDG, Brave Web, and Bing work with zero config.

| Provider | Key Required | Tier | Rate Limit | |----------|-------------|------|------------| | Startpage | No | 1 | — | | DuckDuckGo | No | 1 | 10 req/min | | Brave Web | No | 1 | — | | Bing | No | 1 | — | | Brave API | BRAVE_API_KEY | 2 | 2000/month | | Tavily | TAVILY_API_KEY | 2 | 1000/month | | Exa | EXA_API_KEY | 3 | Trial | | Firecrawl | FIRECRAWL_API_KEY | 3 | Trial |

Tools

| Tool | Purpose | |------|---------| | web_search | Universal web search (registered as web_search) with caching, reranking, and fallback across 8 providers | | github_search | Search GitHub repos, code, issues, and users | | gitlab_search | Search GitLab projects, issues, MRs, and code blobs | | status | Server diagnostics, provider health, budget state |

Query Formats

| Tool | Example | |------|---------| | web_search | typescript tutorial, how to install docker, repo:vercel/next.js | | github_search | repo:org/name, user:vercel, language:typescript | | gitlab_search | project:org/name, scope filter via type param |

Tool Reference

web_search

web_search({
  query: string,
})

Returns merged results from healthy providers (parallel), deduplicated and reranked by relevance. Optimized for AI agents — one parameter, server-side intent detection.

github_search

github_search({
  query: string,
  type?: "repositories" | "code" | "issues" | "users",
  language?: string,
  stars?: string,             // e.g. ">1000", "500..5000"
  page?: number
})

Rate limit: 60 req/hr without token, 5000 req/hr with GITHUB_TOKEN.

gitlab_search

gitlab_search({
  query: string,
  scope?: "projects" | "issues" | "merge_requests" | "blobs",
  page?: number
})

Requires GITLAB_TOKEN with read_api scope.

status

status()

Returns provider health, cache stats, budget state, uptime.

Architecture

Pipeline

Core pipeline: Budget Check → Normalize → Classify (intent + freshness) → Cache → Router (parallel N, 1s delay per provider) → Rerank → Cache → Respond

Providers

| Provider | Type | Key | Tier | Rate Limit | Delay | Suspension | |----------|------|-----|------|-----------|-------|------------| | Startpage | Google mirror (scrape) | No | 1 | — | 1s | incremental backoff | | DDG | HTML scrape | No | 1 | 10 req/min | 1s | captcha → 24h | | Brave Web | HTML scrape | No | 1 | — | 1s | 1min→5min→15min→1h→4h→24h | | Bing | HTML scrape | No | 1 | — | 1s | — | | Brave API | Official API | Yes | 2 | 2000/month | — | — | | Tavily | Official API | Yes | 2 | 1000/month | — | — | | Exa | Official API | Yes | 3 | trial 1000 | — | — | | Firecrawl | Official API | Yes | 3 | trial 500 | — | — |

Rate Limiting

• 1-second delay between requests per scraped provider (static lastRequestTime)
• Incremental backoff on 429/403: suspension grows 1min → 5min → 15min → 1h → 4h → 24h
• Counter resets on success
• Rate limit windows (minute/day/month) persisted to JSON

Full docs:

• Architecture
• Providers & Fallback
• Caching
• Reranking
• Budget System
• Configuration
• Roadmap

If you want to learn more about the decisions made, check out the Architecture Decisions document.

Donations / Support the Project

• EVM Address (USDT, USDC, ETH, BNB): 0x3acf78e721aa065bd1509735a3ace630fcd0f452

  Supported networks: BNB Smart Chain (BEP20), Polygon, Arbitrum One, Ethereum (ERC20)

• USDT (TRC20): TMG1BZJswd8UacHANKVi9Veq5FqSbaMjAQ

  Supported network: Tron (TRC20)

• TON / USDT (TON): UQDjf84AZSwuCPC3UWFv28p-V44zI-1lfhqCMfaex2Q-jDsY

  Supported network: The Open Network (TON)

License

MIT