An automated fact-checking tool that extracts factual claims from draft content and verifies them against real-world evidence using Prismfy.
Install & Download
1. ClawHub CLI
The fastest way to install a skill directly from the registry.
npx clawhub@latest install claim-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 claim-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 Claim Verifier?
The Claim Verifier is a specialized utility within the Openclaw Skills ecosystem designed to safeguard editorial integrity. It systematically parses blog posts, product pages, and social media drafts to identify atomic factual claims, which are then cross-referenced against authoritative external sources. By integrating directly with the Prismfy API, it provides developers and content creators with a rigorous verification layer that catches false, stale, or conflicting information before it reaches an audience.
This skill is particularly valuable for high-stakes outbound communication and technical writing where accuracy is non-negotiable. It doesn't just flag errors; it provides a confidence-scored breakdown of every claim, categorized as verified, weak, conflicting, or not found, ensuring that every piece of content is backed by reliable evidence links.
Claim Verifier Use Cases
- Pre-publication fact-checking for blog posts and technical articles.
- Verifying pricing and feature claims on product landing pages.
- Validating external facts in outbound sales or marketing messages.
- Auditing social media drafts to prevent the spread of misinformation.
- Generating machine-readable verification reports for compliance or quality assurance.
How Claim Verifier Works
- The skill extracts individual factual claims from the provided draft text, prioritizing high-impact or volatile information.
- It executes a series of targeted Prismfy queries for each claim, including contradiction and primary-source searches.
- Evidence is scored based on authority, recency, and cross-source agreement to determine a confidence level.
- Claims are classified into statuses (e.g., verified, conflicting) based on deterministic scoring thresholds.
- A concise human-readable verdict is delivered in the chat, highlighting only the claims that require correction.
- If requested, a detailed claim_verification_report.json artifact is generated for downstream automation.
Claim Verifier Setup
- Install the skill via the CLI:
openclaw skills install claim-verifier
- Configure your Prismfy API key:
export PRISMFY_API_KEY="ss_live_your_key_here"
- Verify the installation and quota connectivity:
cd ~/.openclaw/workspace/skills/claim-verifier
bash claim-verify.sh --quota
- (Recommended) Enable the Openclaw hook for automated workflows:
cp -r hooks/claim-verifier ~/.openclaw/hooks/
openclaw hooks enable claim-verifier
Claim Verifier Data Schema & Taxonomy
The skill generates a structured JSON artifact when a machine-readable report is required. The schema ensures consistency for multi-agent workflows.
| Field | Type | Description |
|---|---|---|
timestamp_utc |
String | ISO timestamp of the verification run. |
summary |
String | A high-level verdict on the draft's publishability. |
items[] |
Array | List of verified claims with metadata. |
items.status |
Enum | verified, weak, conflicting, or not_found. |
items.confidence |
Number | A float between 0.00 and 1.00. |
items.evidence_urls |
Array | Links to primary and secondary sources. |
Claim Verifier Advanced Features
- Multi-query orchestration: Uses five distinct query families per claim to ensure exhaustive searching.
- Deterministic Scoring Rubric: Applies penalties for contradictions and bonuses for primary source authority.
- Automated Hooks: Integrates into the Openclaw hooks registry for seamless background verification.
- Batch Processing: Supports verifying full text files via the claim-verify-batch.sh helper script.
- Fallback Mechanisms: Automatically switches to alternate search paths if the primary API is unavailable.
SKILL.md
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