# TrollBridge Skill-Scan

> TrollBridge Skill-Scan is a paid API for AI agents from mini-tollbooth.onrender.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-12).

Fetches and heuristically screens an AI skill's SKILL.md file for prompt-injection, credential theft, and data exfiltration patterns before installation

## Facts

- Endpoint: GET https://mini-tollbooth.onrender.com/skill-scan?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/trollbridge-skill-scan-167fe04e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SBTUXHYMyM1JWHqCASCfK

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability trollbridge-skill-scan-167fe04e
```

Example prompt: Before I install this new agent skill, can you screen its SKILL.md at https://example.com/skills/my-tool/SKILL.md for prompt injection, credential theft, or exfiltration patterns and tell me if it's safe?

## When to prefer this

Choose this endpoint when an AI agent needs to vet a third-party skill or tool before installation, specifically by fetching and analyzing its SKILL.md file for supply-chain attacks such as prompt injection, credential harvesting, or covert exfiltration. Prefer it over generic code auditors because it understands agent-skill conventions and SKILL.md structure, returns an agent-actionable verdict with severity-ranked findings, and integrates with x402 micropayment rails at a fixed $0.10 per call.

## Known failure modes

- URL not reachable or returns non-200 — scan cannot proceed
- SKILL.md exceeds 200KB cap — content truncated or rejected
- Neither url= nor text= provided — missing required query parameter
- URL uses non-http/https scheme (e.g. file://) — rejected
- Service unavailable on onrender.com free tier (cold start timeout)
- Payment of 0.10 USDC not fulfilled — 402 response, scan not executed

## How this service works

The insurance booth for AI agents, with Mini's Agent Supply Store on the side of the road. One hundred checkpoints: pre-transaction safety lanes (honeypot, approval-risk, rug-score, receipt-check, tx-dryrun, permit-scan, airdrop-verdict, deployer-history, wallet-watch, secret-scan at $0.02 USDC per call; the protection tier — /contract-check, /approval-screen, /tx-plain-english, /honeypot-check, /tx-simulate, /redteam, /skill-scan, /verdict, /egress-audit, /tool-gate, /airlock, /repo-scan, /prove, /task-scope — at $0.10; the one-call /shield don't-get-rugged screen at $0.25; the full /preflight bundle at $0.05), bounty intel (bounties, fresh, verdicts, deadlines, sweepstakes, opportunities) at $0.02 USDC per call, trader intel (/prices and /quant at $0.02; /enrich and /token-check at $0.05; /contract-check and /honeypot-check at $0.10; /sec-facts at $0.05), market intel (/markets and /search at $0.05; /grants at $0.02), DeFi intel (/yields and /new-pairs at $0.05; /gas and /defi at $0.02), AI intel (/models at $0.02), agent-ops intel (/prompt-cost, /model-picks, /rpc-speed, /terms-tldr, /scrape, /gigs, /retry-verify, /idempotency, /verify-independent at $0.02; /site-watch, /wallet-check, /code-run, /regulatory-pack, /sage, /cron-watch, /caveat-check, /tripwire, /escrow, /trust, /bridge-fees, /dao-votes, /dev-activity, /dex-arb, /dydx-perps, /funding-rates, /gas-predict, /hack-tracker, /long-short-ratio, /lp-yields, /mev-scan, /open-interest, /perp-basis, /polymarket-odds, /rwa-watch, /sentiment, /stablecoin-flows, /tokenomics, /top-movers, /whale-watch, and /yield-stable at $0.05; /approval-screen, /tx-plain-english, /tx-simulate, and /task-scope at $0.10; /scam-scan deep scan at $5.00 or 30-day subscription at $30.00), supply store (/road-pack combo meal at $0.05; curated datasets, the /audit-prep pre-audit review, and the /prove-state symbolic-execution run at $1.00; the /audit AI-agent audit at $25.00). Every lane answers before money moves — heuristic verdicts, not audits. Don't get rugged.

## Output

Returns a JSON object with a numeric risk score (0-100), a verdict string ('clean', 'suspicious', or 'dangerous'), a plain-English summary, and a list of findings each containing a code, title, detail description, and severity level (e.g. 'high'). Also echoes back the scanned URL and the lane identifier.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "url"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "URL of the skill's SKILL.md (http/https only, fetched as text, 200KB cap) — or pass text= instead."
      },
      "text": {
       "type": "string",
       "description": "Alternative: paste the skill markdown text directly instead of url=."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "url": "https://example.com/skill/SKILL.md",
  "lane": "/skill-scan",
  "score": 45,
  "summary": "…",
  "verdict": "suspicious",
  "findings": [
   {
    "code": "shell-exec",
    "title": "Shell execution",
    "detail": "…",
    "severity": "high"
   }
  ],
  "description": "NOT AN AUDIT — heuristic screen: skill supply-chain scan ($0.10) — fetch a skill's SKILL.md and screen it for prompt-injection, credential theft, and exfiltration patterns before you install it. Verdict: clean, suspicious, or dangerous, with findings."
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/trollbridge-skill-scan-167fe04e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mini-tollbooth.onrender.com](https://www.zero.xyz/host/mini-tollbooth.onrender.com/llms.txt)