Trust Index APIComing soon Blog Docs

The trust layer for
the agent economy

Free safety scores for every AI product, agent and service.
Know what's safe before you use it.

The problem
Thousands of AI services.
Which ones are safe?
New AI tools launch every day. Anyone can build one. Most are never reviewed for safety, privacy, or reliability. Until now, there was no easy way to check.

No way to check

There's no universal safety rating for AI tools. You're left to trust the marketing, read Reddit threads, or just hope for the best.

Your data is at risk

Many AI tools request access to your files, contacts, and personal data. Most people click "allow" without understanding what they're giving away.

Bad tools look legit

A slick landing page doesn't mean a tool is safe. Malicious AI services look identical to trustworthy ones. You can't tell the difference at a glance.

Things change fast

A tool that was safe last month can push a bad update, change its privacy policy, or start behaving differently — and nobody tells you.

How it works
Six signals.
23 sub-signals.
One score.
Every AI product or service gets a trust score from 0.00 to 5.00. Computed from six weighted signals and 23 sub-signals across vulnerability, operations, and reputation. Updated continuously. Completely transparent.
What we measure
4.20
/ 5.00
— weighted score
Vulnerability & Safety25%
Known CVEs, dependency health, and supply chain analysis.
4.6
Known CVEs40%CVE count and severity scoring
Dependency Health30%Total dependency count evaluation
Supply Chain30%Supply chain presence and transitive CVE penalties
Operational Health15%
Uptime, latency, error rates, and incident history.
4.4
Uptime35%30-day rolling uptime percentage
Response Latency25%p99 response time in milliseconds
Error Rate20%Percentage of non-2xx status codes
Incident History20%Incidents in last 90 days
Maintenance Activity15%
Commit recency, release cadence, and issue responsiveness.
4.2
Commit Recency30%Days since last commit
Release Cadence25%Days since last release
Issue Response20%Median time to close issues
CI/CD Presence25%GitHub Actions workflows present
Adoption15%
Download volume, GitHub stars, and growth trends.
3.0
Download Volume30%npm + PyPI weekly downloads
GitHub Stars25%Stargazers count from GitHub
Dependents30%Downstream dependent packages
Growth Trend15%Week-over-week download velocity
Transparency15%
Open source status, documentation, security policy, and changelog.
3.8
Open Source30%Public repo and license type
Documentation25%README quality and docs presence
Security Policy20%SECURITY.md file presence
Changelog25%CHANGELOG.md and release history
Publisher Trust15%
Track record, org maturity, and cross-platform identity.
4.3
Track Record30%Sibling service scores and GitHub credibility
Org Maturity30%GitHub account age and organization type
Community Standing20%Public repository count
Cross-Platform20%Presence on GitHub, npm, and PyPI
COMING SOON
The Fabric API.
Scores in your pipeline.
Query any service programmatically. Get the score, signals, and alerts in one call. Integrate safety checks into your agent workflows, CI/CD, or tool selection logic.
// Check if a tool is safe before granting access

const res = await fetch(
  'https://api.fabriclayer.ai/v1/lookup?slug=mcp-python-sdk'
)
const { score, status, signals } = await res.json()

// score:  4.59
// status: "trusted"
// signals:
//   vulnerability:     4.8
//   maintenance:        5.0
//   operational_health: 4.5
//   adoption:           3.9
//   transparency:       4.5
//   publisher_trust:    4.3

if (status === 'blocked') {
  throw new Error('Tool failed safety check')
}
Lookup by slug
Query any indexed service by name. Get the full score breakdown and current status instantly.
Signal breakdown
All 6 trust signals returned with individual scores and weights. Full transparency on every check.
Active alerts
Recent incidents for any service — CVEs, deprecations, ownership changes, downtime events.
Batch queries
Check multiple services in one call. Score your entire dependency tree or tool selection set at once.
Get early API access
We'll notify you when the API launches. No spam.
FAQ
Frequently asked questions
What is the Fabric Trust Index?
The Fabric Trust Index is a free, public directory of trust scores for AI tools, models, MCP servers, and API services. Every service gets a composite score from 0.00 to 5.00 computed across six independently weighted signals: Vulnerability & Safety, Operational Health, Maintenance Activity, Adoption, Transparency, and Publisher Trust. Scores are auto-generated from public data sources—no provider registration required.
How are trust scores calculated?
Each service is evaluated across 23 sub-signals grouped into six dimensions. Sub-signals are collected from public sources like GitHub, npm, NVD, and uptime monitors. Each sub-signal is scored 0–5, weighted within its dimension, and the six dimension scores are combined using fixed weights (Vulnerability 25%, Operational 20%, Maintenance 20%, Adoption 15%, Transparency 10%, Publisher Trust 10%) into a single composite score.
What do the status labels mean?
Services scoring 3.00 or above are labeled Trusted (low risk detected). Services between 1.00 and 2.99 are labeled Caution (human review recommended). Services below 1.00 are labeled Not Recommended. These labels help AI agents and developers make quick decisions, but we recommend reviewing the full signal breakdown for context.
Is the Trust Index free?
Yes. The Trust Index website is completely free to browse and search. No account is required. We also plan to offer a free tier of the Trust API for programmatic access to scores. The Trust Index is the public-facing layer of Fabric’s broader infrastructure for AI agent trust and payments.
How often are scores updated?
Scores are recalculated daily. Critical signals like CVE advisories and uptime checks are monitored more frequently—CVEs every 5 minutes, health checks every 15 minutes. New services are discovered and scored automatically as they appear in public registries.
Can I claim or dispute a score?
Yes. Every service detail page has a “Report Issue” button. Publishers can also claim their service profile to unlock deeper evaluation and real-time monitoring. Trust scores are informational and auto-generated—they are not endorsements or guarantees. We welcome feedback to improve accuracy.
Is this AI tool safe to use?
Now you can check.
Search any AI product, service or agent and get an instant trust score. Free. No account needed.
Check here →