What is nimble-web-expert?

A tool for finding and extracting current information from websites, including pages, listings, prices, reviews, jobs, statistics, and documentation.

Use it to read a specific URL, search for relevant pages, discover website links, crawl sites, or gather data for a report or comparison.

It removes the need to manually browse many pages or turn messy web content into structured information yourself.

nimble-web-expert — Skill for Claude Code by Nimbleway

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add Nimbleway/agent-skills --skill nimble-web-expert

Clone the repo

git clone --depth 1 https://github.com/Nimbleway/agent-skills

Made for: Claude Code.

Or install nimble, the plugin that ships this one along with the rest of its 15 skills, 1 command, 2 agents.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/nimbleway/agent-skills/nimble-web-expert/github.svg)](https://agentmods.dev/skills/nimbleway/agent-skills/nimble-web-expert)

Your own site

<a href="https://agentmods.dev/skills/nimbleway/agent-skills/nimble-web-expert"><img src="https://agentmods.dev/badge/skills/nimbleway/agent-skills/nimble-web-expert/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/nimbleway/agent-skills/nimble-web-expert"><img src="https://agentmods.dev/badge/skills/nimbleway/agent-skills/nimble-web-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 155 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 5,428 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

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 2 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium Excessive Agency · line 82
Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
medium Prompt Injection · line 223
Large whitespace padding was detected (a block of blank lines or a long run of spaces). This can push injected instructions below or to the right of the visible area so a human reviewer never sees them while the agent still reads them. Manual review of the hidden content is recommended.

Fix: Remove the large whitespace padding (blank-line blocks or long space runs) and review any content hidden below or to the right of it. Keep skill files compact and reviewable so no instructions can be

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.

Model	Per session	Once invoked
Fable 5.1	$0.00155	$0.05428
Opus 5	$0.00077	$0.02714
Sonnet 5	$0.00031	$0.01086
Haiku 4.5	$0.00015	$0.00543

Measured 12d ago against content hash 4f2129574bad, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

nimble-web-expert 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 12d 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.

Makes network callslowCapability

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

- **No working CLI and no connected MCP → stop.** Do not fall back to WebFetch, WebSearch, curl, or `dangerouslyDisableSandbox`. If the plugin is installed but the connector isn't connected (typical Cowork / claude.ai),

skills/nimble-web-expert/SKILL.md · 301 lines

How it starts

The opening of the file, as written. The whole thing — 301 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Nimble Web Expert

Web extraction, search, and URL discovery using the Nimble CLI. Returns clean structured data from any website.

User request: $ARGUMENTS

Core principles

Route by intent first (see Analyze & Route for the full decision model). Named site with a matching Extraction Template + a direct item to look up → run the template. Site with no template, or a need that requires discovery/reasoning across pages → a Web Search Agent. One-off single URL → nimble extract. Raw results to work from ("find pages/articles about…") → nimble search; a synthesized deliverable (report, brief, comparison, recommendation) → a Web Search Agent. Discover/crawl URLs → nimble map or nimble crawl.
Web Search Agent runs: pick a run mode before building the command. Default to named create-or-reuse — nimble agents run --agent-name <stable-name> — so a repeat session lands on the same agent. agents:runs create is the explicit-agent-ID route only and requires --agent-id. references/nimble-agents/reference.md has the mode table, use_case locking, and the one-time skill override.
One command → present results → done. Run once, show the data immediately as a table. Do NOT experiment, loop, or write Python to parse output.
Multiple inputs → always parallel. 2+ URLs/keywords/ASINs → &+wait. 6–20 → xargs -P. 20+ → Python asyncio script. See references/batch-patterns.md.
Escalate render tiers silently on empty or truncated content. Tier 1 → 2 → 3 → … without asking. Surface a decision only when all tiers fail and investigation tools are needed. An access barrier is a different outcome, not a tier to climb — see Guardrails.
Never answer from training data. Live prices, current news, today's listings → always fetch via Nimble. If unavailable, say so.
AskUserQuestion at every meaningful choice. Header ≤12 chars, 2–4 options, label 1–5 words, recommended option first. Never present choices as numbered prose.
Save all outputs to .nimble/. Never leave extraction results in memory only.
Verify the connection BEFORE working — don't fire a data call and react to the error. With bash, nimble --version + NIMBLE_API_KEY confirms the CLI path; otherwise run one read-only mcp__plugin_nimble_nimble__nimble_agents_list probe. Success = connected; an auth/not-connected error or a response containing an OAuth authorization URL = not connected.
No working CLI and no connected MCP → stop. Do not fall back to WebFetch, WebSearch, curl, or dangerouslyDisableSandbox. If the plugin is installed but the connector isn't connected (typical Cowork / claude.ai), surface the verbatim connect steps from rules/setup.md and stop; if no plugin at all, follow the install flow in rules/setup.md.
If a tool hands back an OAuth "Authorize" link instead of data, present it exactly as given and stop. Never invent a "paste the URL back" / "I'll complete the connection" step — none exists — and never claim tools "will activate" then call them in the same turn. Wait for the user to authorize, then retry or re-probe.

Read the full file on GitHub · 301 lines

Files

What ships with it

19 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.

12d ago First seen · 301 lines · 155 tokens per session scan A 4f2129574bad

Subscribe to this mod's changes

nimble-web-expert is a skill published in the GitHub repository Nimbleway/agent-skills (53 stars, last pushed 16d ago), licensed MIT. It adds 155 tokens to every session and 5,428 once invoked, about $0.0008 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.

Browser automation Claude Code Research agent-skills ai-agents codex cursor data-extraction

docs

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nimble-web-expert