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Install in OpenClaw
/install nansen-web-fetcher
Description
Fetch and analyze content from one or more URLs using AI (Gemini 2.5 Flash). Use when you have specific URLs and need to extract or summarize their content....
Usage Guidance
This skill appears to do exactly what it says: run the nansen CLI against URLs using your NANSEN_API_KEY. Before installing, verify the npm package 'nansen-cli' is the official/expected package (check the package owner, repo URL, and recent versions), consider installing in a controlled environment, and ensure the API key you provide has appropriate scope and billing controls (rotate the key after testing). If you are unsure about the npm package's provenance, inspect its source repository and published files (or run it in a sandbox) before granting your production API key.
Capability Analysis
Type: OpenClaw Skill
Name: nansen-web-fetcher
Version: 0.1.0
The skill bundle defines a legitimate interface for fetching and analyzing web content using the `nansen-cli` tool. It requires a `NANSEN_API_KEY` and provides clear, functional instructions for the AI agent to use the `nansen web fetch` command. No evidence of malicious intent, data exfiltration, or prompt injection was found in SKILL.md or _meta.json.
Capability Assessment
Purpose & Capability
Name and description (fetch and analyze web URLs) match the declared requirements: the nansen binary and NANSEN_API_KEY are exactly what the nansen CLI would need to perform web fetches and AI analysis.
Instruction Scope
SKILL.md instructs only running the nansen CLI (nansen web fetch ...) against user-supplied URLs and asking a question. It does not instruct reading unrelated files, accessing other env vars, or posting data to unexpected endpoints.
Install Mechanism
Install uses a public package manager (node/npm) installing package 'nansen-cli' which produces the nansen binary — this is expected for a CLI-based skill. This is moderate-risk compared with instruction-only skills because it writes a binary to disk; verify the npm package's authenticity and maintainers before installing.
Credentials
Only NANSEN_API_KEY is required and declared as the primary credential, which is proportionate for a service-backed fetch-and-analyze tool. No additional secrets or unrelated env vars are requested.
Persistence & Privilege
always is false and the skill does not request system-wide config changes or access to other skills' credentials. Default autonomous invocation is allowed (platform normal) and not combined with other high-risk flags.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install nansen-web-fetcher - After installation, invoke the skill by name or use
/nansen-web-fetcher - Provide required inputs per the skill's parameter spec and get structured output
Version History
v0.1.0
Initial release of nansen-web-fetcher.
- Fetches and analyzes content from one or more URLs using Gemini 2.5 Flash.
- Supports both positional URL arguments and `--url` flags (up to 20 URLs).
- Requires a `--question` prompt about the content to generate an AI-powered answer.
- Outputs include `analysis`, `retrieved_urls`, and `failed_urls`.
- Integrates well with results from `nansen web search`.
- Added human-readable JSON output with `--pretty` flag.
- Includes usage guidance and notes in SKILL.md.
Metadata
Frequently Asked Questions
What is Nansen Web Fetcher?
Fetch and analyze content from one or more URLs using AI (Gemini 2.5 Flash). Use when you have specific URLs and need to extract or summarize their content.... It is an AI Agent Skill for Claude Code / OpenClaw, with 170 downloads so far.
How do I install Nansen Web Fetcher?
Run "/install nansen-web-fetcher" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Nansen Web Fetcher free?
Yes, Nansen Web Fetcher is completely free, licensed under MIT-0. You can download, install and use it at no cost.
Which platforms does Nansen Web Fetcher support?
Nansen Web Fetcher is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Nansen Web Fetcher?
It is built and maintained by Nansen AI (@nansen-devops); the current version is v0.1.0.
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