AgentTrust — Security Scanner for AI Skills

Scan AI agent skills for malware, prompt injection, data exfiltration, and 47 other security threats. JWS-signed ACT/HALT receipts. x402-native, no API keys, no accounts. MCP manifest scanning.

AgentTrust

Description

Security Scanner and Reputation Oracle for AI agent skills and MCP servers. Scans for malware, prompt injection, tool poisoning, and 47 other threat patterns. Returns cryptographically signed ACT/HALT receipts (JWS, draft-krausz-verification-state-01). x402-native on Base mainnet. Conforming implementation of IETF draft-krausz-verification-state-01 alongside AgentOracle.

Unique features:

• SKILL.md scanner — 40 rules, 12 categories
• MCP manifest scanner — tool poisoning, shadowing, hidden unicode, rug pull detection
• Unified trust gate — skill + MCP + endpoint reputation in one signed call
• Composed receipt — two-issuer JWS envelope (AgentTrust + AgentOracle, Phase 1 live)
• JWS-signed receipts — verifiable ACT/HALT per IETF draft-krausz-verification-state-01
• Endpoint reputation — on-chain trust score before your agent pays
• Trust badge — SVG badge for x402 providers
• MCP server — install via npx @poteshniy/agenttrust-mcp for Claude Desktop, Cursor, Windsurf

Privacy notice: Submitted content is sent to agenttrust.uk for analysis. Only submit content you are comfortable sharing.

Payment notice: Full scan endpoints require x402 USDC payments on Base. Free tiers require no wallet.

Instructions

Always try free endpoints first. Before using any paid endpoint, ask the user for explicit confirmation and disclose the exact price.

Free SKILL.md scan (no payment required)

POST https://agenttrust.uk/v1/scan/free Price: FREE Body: { "content": "<skill content, max 50 lines>" } Returns: safety score 0-100, level (SAFE/MEDIUM/HIGH/CRITICAL), findings, v_gate (act/halt), JWS receipt Note: Rate limited to 10 requests/hour per IP.

Full SKILL.md scan (requires explicit user approval)

POST https://agenttrust.uk/v1/scan Price: 0.015 USDC on Base (x402) Body: { "content": "" } Returns: safety score, all 40 findings, integrity hash, JWS receipt Note: Results are cached — repeated scans return instantly.

Free MCP manifest scan (no payment required)

POST https://agenttrust.uk/v1/scan/mcp/free Price: FREE Body: { "manifest": } Returns: safety score, level, findings (tool poisoning, shadowing, etc.), v_gate, JWS receipt Note: Rate limited to 10 requests/hour per IP.

Full MCP manifest scan (requires explicit user approval)

POST https://agenttrust.uk/v1/scan/mcp Price: 0.015 USDC on Base (x402) Body: { "manifest": } Returns: full scan, all 50 rules, JWS receipt

Unified trust gate (FREE)

POST https://agenttrust.uk/v1/gate Price: FREE Body: { "skill": "", "mcp": , "endpoint": "" } Note: All fields optional — include whichever you want to check. Returns: v_gate (act/halt), v_recommendation, worst_level, per-component results, JWS receipt Use this to check everything at once before your agent acts.

Composed receipt (FREE)

POST https://agenttrust.uk/v1/compose Price: FREE Body: { "claim_hash": "sha256-...", "skill": "", "mcp": } Returns: two-issuer JWS envelope (AgentTrust + AgentOracle), composed_decision (act/halt) Note: Phase 1 live — two signers. Phase 2 adds Presidio as third signer.

Sign canonical bytes (FREE)

POST https://agenttrust.uk/v1/sign Price: FREE Body: { "canonical_bytes_b64u": "" } Returns: AT signature + protected header for composed JWS assembly

Endpoint reputation check (FREE)

GET https://agenttrust.uk/v1/reputation?url=<endpoint_url> Price: FREE Returns: trust score 0-100, badge (TRUSTED/UNVERIFIED/SUSPICIOUS), issues, on-chain stats

Trust badge (FREE)

GET https://agenttrust.uk/v1/badge?url=<endpoint_url> Price: FREE Returns: SVG badge — embed with

Wallet reputation lookup (requires explicit user approval)

GET https://agenttrust.uk/v1/trust/:address Price: 0.010 USDC on Base (x402) Returns: trust score, incident history, audit status

Verify integrity (requires explicit user approval)

POST https://agenttrust.uk/v1/verify Price: 0.005 USDC on Base (x402) Body: { "hash": "" } or { "content": "" } Returns: verified true/false, last scan result

Full audit report (requires explicit user approval)

POST https://agenttrust.uk/v1/report Price: 0.050 USDC on Base (x402) Body: { "content": "", "skill_id": "" } Returns: full report with per-finding remediation guidance

MCP Server (Claude Desktop / Cursor / Windsurf)

Install once and use all tools directly in your AI client: npx @poteshniy/agenttrust-mcp

Config: {"mcpServers":{"agenttrust":{"command":"npx","args":["-y","@poteshniy/agenttrust-mcp"]}}}

JWS Receipt Verification

All scan responses include a signed receipt field. Verify with: JWKS: https://agenttrust.uk/.well-known/jwks.json Mapping: https://raw.githubusercontent.com/poteshniy/agenttrust/main/docs/mapping-v0.3.md Spec: https://datatracker.ietf.org/doc/draft-krausz-verification-state/