add-tavily-tool

add-tavily-tool is a skill for Claude Code from nanocoai/nanoclaw. It costs 41 tokens per session (1,767 once invoked), scanned A, original, MIT.

A web-search and webpage-extraction connection using Tavily, an online service that searches the web and retrieves page content. It adds these functions as tools for selected agent groups.

In plain words
What is it for?
Use it to search the web and extract content from specified webpages. The tools can be used by agents that support MCP, including Claude, OpenCode, and Codex.
Why use it?
It gives agents that do not already have equivalent web tools a way to find online information and extract content from URLs. It can also provide structured webpage extraction where web search is already available.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; mentions CLAUDE.md; mentions Codex.

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is ./container/build.sh.

Good fit Use it to search the web and extract content from specified webpages. The tools can be used by agents that support MCP, including Claude, OpenCode, and Codex.

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About the project

NanoClaw is an AI assistant that runs agents inside separate Linux containers, isolating their files and execution environments. People use it to connect agents to messaging services and run assistants with memory and scheduled jobs. The catalogue contains skills and instructions for extending or operating NanoClaw.

nanocoai/nanoclaw · 30,736 stars · on GitHub · nanoclaw.dev

Install

Getting it into your agent

It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.

Clone the repo
git clone --depth 1 https://github.com/nanocoai/nanoclaw
agentmods
npx agentmods add skills/nanocoai/nanoclaw/add-tavily-tool

Made for: Claude Code.

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README.md
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Your own site · 80×15
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Per session 41 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,767 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Snyk warn 7 Sept 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00041 $0.01767
Opus 5 $0.00020 $0.00883
Sonnet 5 $0.00008 $0.00353
Haiku 4.5 $0.00004 $0.00177

Measured 11d ago against content hash 33004bd8cd0e, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

add-tavily-tool scanned grade A with 1 finding 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 11d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (tavily-manifest.test.ts), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

2. Gate the deeplink: `curl -fs <dashboard-url>/connections/custom` must return
.claude/skills/add-tavily-tool/SKILL.md · 179 lines

How it starts

The opening of the file, as written. The whole thing — 179 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Add Tavily Tool

Install the pinned mcp-remote bridge in the agent image and register Tavily's remote MCP server for each selected agent group. The MCP server supplies its tool descriptions and input schemas at runtime.

The registered server exposes:

  • mcp__tavily__tavily_search
  • mcp__tavily__tavily_extract

The registration is provider-agnostic: any provider with MCP support picks it up (Claude, OpenCode, and Codex all do). Groups on the Claude provider already have the built-in WebSearch and WebFetch tools (container/agent-runner/src/providers/claude.ts), so the skill adds the most for groups on other providers, and for Tavily's structured extraction anywhere.

Phase 1: Pre-flight

Check whether the bridge is already in the image manifest, then list the groups:

grep -n '"mcp-remote"' container/cli-tools.json || true
ncl groups list

Ask which agent groups should receive Tavily. If mcp-remote is already present at a pinned version, reuse the existing entry instead of adding a second one.

Phase 2: Install the MCP bridge

Add this object to the top-level array in container/cli-tools.json when an entry named mcp-remote is not already present:

{
  "name": "mcp-remote",
  "version": "0.1.38"
}

Keep the JSON valid and limit the entry to the two fields shown; this package does not require a native build-script opt-in.

Copy the dependency guard into the host test tree:

cp .claude/skills/add-tavily-tool/tavily-manifest.test.ts src/tavily-manifest.test.ts

Build the image and run the guard:

./container/build.sh
pnpm exec vitest run src/tavily-manifest.test.ts

The manifest is the only source-backed integration point. Per-group MCP registration is runtime state stored through ncl, so it has no in-tree line for a registration test to guard.

Phase 3: Register Tavily

config add-mcp-server and groups restart are approval-gated. Run from inside a container they return approval-pending immediately; that is not an error. Wait for the admin's approval and the follow-up system message before moving on to Phase 4.

Read the full file on GitHub · 179 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

  1. 11d ago First seen · 179 lines · 41 tokens per session scan A 33004bd8cd0e

Subscribe to this mod's changes

add-tavily-tool is a skill published in the GitHub repository nanocoai/nanoclaw (30,736 stars, last pushed yesterday), licensed MIT. It adds 41 tokens to every session and 1,767 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.