Automate the verification of evidence URLs to ensure artifact links resolve to real content instead of placeholders or dead ends.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install evidence-url-verifier
2. Manual Installation
Copy the skill folder to one of these locations
~/.openclaw/skills/ <project>/skills/ Priority: Workspace > Local > Bundled
3. Prompt Installation
Copy this prompt to OpenClaw to install it automatically.
Help me install evidence-url-verifier using Clawhub. If Clawhub is not installed, install it first (npm i -g clawhub).
Prefer to download?
Get the raw skill files in a ZIP archive.
What is Evidence URL Verifier?
The Evidence URL Verifier is a robust utility designed for Openclaw Skills to maintain the integrity of AI-generated reports and task completions. It addresses the common issue where agents provide placeholder links, expired resources, or non-existent URLs as proof of work. By integrating this skill, you ensure that every claim made by an agent is backed by a reachable, substantive resource.
This skill is particularly useful for developers and automation engineers who need to trust but verify the outputs of their AI workflows. It transforms the validation process from a manual chore into an automated gatekeeper within the Openclaw Skills ecosystem, ensuring that artifact links resolve to actual content and not just empty strings or example domains.
Evidence URL Verifier Use Cases
- When an AI agent claims an evidence artifact has been created or updated in the workflow.
- Validating URLs provided as proof of completion before marking a high-stakes task as finished.
- Performing bulk audits of past task completions to ensure long-term link stability and resource availability.
- Checking local artifact paths to confirm that generated files are present and contain data rather than being empty 0-byte files.
How Evidence URL Verifier Works
- The skill initiates URL Validation by sending a HEAD request to the target URI to check for a successful HTTP 200 response.
- It performs Content Verification by comparing the returned MIME type against expected formats and scanning for common placeholder strings.
- It executes an Artifact Existence check for local filesystem paths to ensure the file exists and has substantive size.
- The skill generates a structured validation report that can be used to satisfy completion criteria within Openclaw Skills.
Evidence URL Verifier Setup
To integrate this verification logic into your Openclaw Skills environment, ensure you are running PowerShell with network access enabled. You can utilize the following structure for your local script setup:
# Define the verification function
# Usage: Test-EvidenceUrl -url "https://your-artifact-link.com"
Ensure that your environment variables allow for outbound HTTP requests and that you have the necessary permissions to read local artifact paths for file-based verification.
Evidence URL Verifier Data Schema & Taxonomy
The skill organizes its verification metadata using a clear taxonomy to ensure compatibility with other Openclaw Skills components. Results are typically structured as follows:
| Property | Purpose |
|---|---|
| Valid | A boolean flag indicating if the resource passed all checks. |
| Status | The HTTP status code or filesystem state returned during verification. |
| ContentType | The identified media type of the resource to ensure it matches expectations. |
| Error | Descriptive text providing context if a link is broken or inaccessible. |
| Substantive | Indicates whether the content is real or appears to be a placeholder. |
Evidence URL Verifier Advanced Features
- Placeholder detection logic to automatically flag lorem ipsum or example.com links.
- Multi-protocol support covering both HTTPS web resources and local Windows/Linux file paths.
- Content-type enforcement to ensure that a link claiming to be a PDF is not actually a text error page.
- Privacy-conscious logging that redacts sensitive data while maintaining an audit trail for Openclaw Skills operations.
SKILL.md
Loading
Related Openclaw Skills
ClawHub Web Publisher
A specialized utility for publishing Openclaw Skills directly through the ClawHub web dashboard to bypass CLI authentication hurdles.
ClawHub Web-Only Publish
A streamlined method for publishing skills to ClawHub using a web dashboard to bypass CLI authentication hurdles.
Blocker Minimum Input
A structured reporting protocol that forces AI agents to provide exact error context and the minimum required user action to resolve blockers fast.
YouTube Outlier Skill
Identify trending YouTube outlier videos within specific niches to automate content research and reporting.
Gateway Token Doctor
A diagnostic and repair utility to eliminate 401 Unauthorized errors by synchronizing tokens across all service layers.
Instruction Anchor Guard
A persistence layer for AI agents that ensures critical user constraints and high-priority rules are never lost during context compaction or long sessions.
Featured*
