AgentHubAgentHub

nab MCP Setup & Guide

MCP ServerMCP RegistryOfficial

io.github.MikkoParkkola/nab · v0.12.6

Token-optimized HTTP client for LLMs: fetches any URL as clean markdown. CLI and MCP server.

Repository ↗

Copy the install config on this page first, then verify docs and permissions upstream.

Overview

Token-optimized HTTP client for LLMs: fetches any URL as clean markdown. CLI and MCP server. nab is a MCP Server listed from MCP Registry. Transports: stdio. This page includes an overview, setup tutorial, install commands, and use cases for Trae, Tongyi Lingma, Cursor, Claude Code, and VS Code.

Use cases

Code review & GitHubCursor essentials

AgentHub Verified AvailabilityTested & Ready

Automated pipeline validated install commands, protocol & client compatibility

Verified At2026-10-24
Install Snippets TestedCLI & JSON config syntax verified
Protocol Handshake ReadyComplies with JSON-RPC 2.0 specifications
Origin Registry ActiveSourced from official-mcp-registry
Verified ClientsClaude Code、Claude Desktop、Cursor 等
Security Tier: A+ 级 · 官方认证推荐 (A+)·Maintained by official/verified teams, audited for standard MCP protocol compliance.
No auto-generated install guide — see the source repository README.

Troubleshooting & Common ErrorsFAQ

Common connection errors and verified fixes for nab

Getting 'connection closed' or exit code 1 in Cursor / Claude Code for nab?

Usually caused by missing runtime paths or IDE environment inheritance. Fix steps: 1. Verify Node.js 18+ (npx) or Python 3.10+ (uvx) is installed; 2. Run 'which npx' or 'which uvx' in terminal, and replace 'command' with absolute path; 3. Reload or restart the client window after modifying config.

Fix Snippet
# Check binary path in terminal:
which npx
node -v
Getting 'spawn npx ENOENT' or 'command not found'?

The editor background process does not inherit your full terminal PATH. Solution: Globally install the package, or set the absolute binary path (e.g. C:\Program Files\nodejs\npx.cmd on Windows, or /usr/local/bin/npx on macOS).

Missing required environment variable or authentication failure?

nab requires environment variables (NAB_SSRF_ALLOW_PRIVATE、NAB_SSRF_ALLOWLIST、NAB_WEBMCP_STRICT、NAB_WEBMCP_OPT_IN、NAB_STATE_DIR、NAB_KEYCHAIN_INTERACTION、NAB_OP_BIN、NAB_MCP_CLI_BIN、NAB_NO_TELEMETRY、NAB_TELEMETRY_ENDPOINT). Ensure you have added valid keys under the 'env' object in your config file without trailing whitespace.

Fix Snippet
// .cursor/mcp.json 或 claude_desktop_config.json
{
  "env": {
    "API_KEY": "your_actual_key_here"
  }
}
Still not connecting? Read the MCP troubleshooting guide →

Tool Mock Playground

Sandbox

nab Tool Interface Simulation · Preview tool schema & outputs without local runtime

Sandbox Ready
fn: nabExecute the core tool interface of nab
Request ArgumentsJSON Schema
{
  "target": "nab",
  "action": "execute",
  "options": {
    "mode": "standard",
    "timeoutMs": 5000
  }
}
💡Parameters generated dynamically by Agent runtime
Agent Tool Output

Click 'Run Mock' above

to preview the raw response returned to the LLM

Env: AgentHub Virtual SandboxJSON-RPC 2.0

Decision Guide: Why & When to Use

Assess suitability before installing to save trial-and-error time

Best Suited For
  • PR review
  • Changelog generation
  • Cross-repo issue search
When NOT to Use
  • Replacing human security audit
  • Unauthorized repo access
Recommended Workflow Pairing:View Scenario →

nab + Scenario Prompt → Complete Agent Automation

MCP hands-on: install to visible results

Follow the full lab (expected UI/output + contrast checks). After installing this item, verify with the tutorial prompts.

Open tutorial →

Related resources

Often paired with

中文公文写作

v2.0.41

SkillClawHub10.2k

io.clawhub.gongyu0918-debug/chinese-official-writing

用于中文公文、事务性材料和新闻稿件的起草、改写、压缩、润色、审校、文种核对、去口语化、降 AI 味及 Word 格式处理，适用于机关、企事业单位、学校和新闻机构。涵盖申请、请示、报告、通知、通告、意见、决定、决议、议案、公报、命令、函、复函、批复、说明、方案、纪要、公告、公示、通报、制度、规定、办法、细则、操作规程、工作要点、总结、调研、讲话、致辞、主持词、述职、可研、审查材料、技术需求、新闻消息、编者按、新闻评论，以及采购、整改、反馈和 AI 算力等场景。

source
View on ClawHub

Planning with files

v3.25.0

SkillClawHub45.4k

io.clawhub.othmanadi/planning-with-files

Persistent file-based planning for multi-step AI-agent work. Keeps task_plan.md, findings.md, and progress.md on disk; lifecycle hooks inject selected project planning context. Automatic recovery reads project planning files only. Explicit session-catchup.py --metadata reads same-project local agent session records and emits aggregate counts only; --replay may emit bounded nonce-framed excerpts. Optional gated mode can request continuation only when the host supports it and never runs commands declared in Markdown. The skill has no network upload path. Use for research or work needing 5+ tool calls.

source
View on ClawHub

Keep exploring AgentHub

Most people compare similar tools or check scenario guides before installing—start here.

Browse more like thisSearch similarPick by scenarioPrompt playbooksMCP hands-onReviews & comparisons

Listing badge: put AgentHub on your site

Copy either snippet into your project homepage, docs, or GitHub README. The badge is a hotlinked SVG — nothing to host — and it links back to this page so visitors can find the install steps.

PreviewListed on AgentHub: nab
HTML
<a href="https://myagenthub.cn/p/io.github.MikkoParkkola/nab" title="Listed on AgentHub: nab" target="_blank" rel="noopener">
  <img src="https://myagenthub.cn/badge/io.github.MikkoParkkola/nab?lang=en" alt="Listed on AgentHub: nab" height="20" style="border:0"/>
</a>
Markdown (GitHub README)
[![Listed on AgentHub: nab](https://myagenthub.cn/badge/io.github.MikkoParkkola/nab?lang=en)](https://myagenthub.cn/p/io.github.MikkoParkkola/nab)

Badges are generated on the fly from /badge/<package-id>, so name and listing changes propagate automatically. Keep the link target unchanged — it is what counts as the referral.

Unified Manifest

{
  "id": "io.github.MikkoParkkola/nab",
  "type": "mcp-server",
  "version": "0.12.6",
  "displayName": "nab",
  "description": "Token-optimized HTTP client for LLMs: fetches any URL as clean markdown. CLI and MCP server.",
  "repository": {
    "url": "https://github.com/MikkoParkkola/nab",
    "source": "github"
  },
  "homepage": "https://github.com/MikkoParkkola/nab",
  "distribution": {
    "packages": [
      {
        "registryType": "binary",
        "identifier": "nab",
        "version": "0.12.6",
        "transport": "stdio",
        "environmentVariables": [
          {
            "name": "NAB_SSRF_ALLOW_PRIVATE",
            "description": "Set to allow fetching private/internal IP addresses (corporate dashboards). Never unblocks loopback, link-local/cloud-metadata, or other always-denied ranges. Off by default."
          },
          {
            "name": "NAB_SSRF_ALLOWLIST",
            "description": "Comma-separated list of private IP/CIDR ranges to exempt from the SSRF guard (e.g. 10.252.0.0/16,192.168.1.5). Narrower, preferred alternative to NAB_SSRF_ALLOW_PRIVATE. Empty by default."
          },
          {
            "name": "NAB_WEBMCP_STRICT",
            "description": "Set to a truthy value to require fetched pages advertising a WebMCP manifest to match NAB_WEBMCP_OPT_IN before ingestion is allowed (defense against prompt injection via fetched content). Off by default."
          },
          {
            "name": "NAB_WEBMCP_OPT_IN",
            "description": "Comma-separated allowlist consulted when NAB_WEBMCP_STRICT is enabled. Empty by default."
          },
          {
            "name": "NAB_STATE_DIR",
            "description": "Overrides the directory used to persist session/cookie state (default: ~/.nab)."
          },
          {
            "name": "NAB_KEYCHAIN_INTERACTION",
            "description": "Controls whether cookie extraction may prompt macOS Keychain for authorization. Set to 'never' in automated/headless callers so a background fetch cannot open a GUI dialog."
          },
          {
            "name": "NAB_OP_BIN",
            "description": "Path to the 1Password CLI binary used for credential retrieval during the login tool (default: op)."
          },
          {
            "name": "NAB_MCP_CLI_BIN",
            "description": "Path to the mcp-cli binary used for MCP-based credential retrieval (default: mcp-cli)."
          },
          {
            "name": "NAB_NO_TELEMETRY",
            "description": "Set to anything other than 0 or false to skip the daily heartbeat. NO_TELEMETRY and DO_NOT_TRACK do the same."
          },
          {
            "name": "NAB_TELEMETRY_ENDPOINT",
            "description": "Replace the daily heartbeat URL. An empty value leaves the default."
          }
        ]
      }
    ],
    "remotes": []
  },
  "dependencies": [],
  "installTargets": [
    "claude-code",
    "claude-desktop",
    "cursor",
    "vscode",
    "trae",
    "cherry-studio",
    "lingma",
    "windsurf",
    "cline",
    "workbuddy"
  ],
  "keywords": [],
  "provenance": {
    "origin": "official-mcp-registry",
    "originalId": "io.github.MikkoParkkola/nab",
    "originalUrl": "https://registry.modelcontextprotocol.io/v0.1/servers/io.github.MikkoParkkola%2Fnab/versions/latest",
    "isOfficial": true,
    "status": "active"
  }
}
nab MCP Setup & Guide - AgentHub