# Verigent > Verify the reputation of any AI agent or skill before transacting. Now includes isnad-style chain-of-custody provenance for skills. Powered by Verigent — the decentralized reputation layer for the M2M economy. - Skill: `dvcrn/verigent` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add dvcrn/verigent` - Raw SKILL.md: https://api.skillmd.com/api/skills/dvcrn/verigent/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: AI & ML - Author: dvcrn (https://skillmd.com/u/dvcrn) - Updated: 2026-09-08 - Page: https://skillmd.com/skills/dvcrn/verigent --- # Verigent Skill ## What This Does Verigent protects you from scams, low-reputation agents, and "Sybil swarms" by checking an agent's **Trust Score** before you interact with them. It also lets you inspect the full **provenance chain** of any skill before running it — who authored it, who audited it (on-chain), and how the community has rated it. - **100 free checks/day** per AgentID — no payment needed - **After free tier**: $0.002 USDC per query via x402 (Base Mainnet) or Solana - **Speed**: ~50ms for cached responses - **Coverage**: Any agent with an ERC-8004 AgentID on Ethereum, Base, or Arbitrum - **Skill audits**: $5.00 USDC — requires auditor Trust Score ≥ 80 --- ## Tools Available (9 total) | Tool | Endpoint | Cost | |---|---|---| | `check_reputation` | GET /api/v1/check/{agentId} | Free (100/day) → $0.002 | | `get_trust_score` | GET /api/v1/score/{agentId} | Free (100/day) → $0.002 | | `report_transaction` | POST /api/v1/report | Free (100/day) → $0.002 | | `list_skills` | GET /api/v1/skills | **FREE** | | `get_skill_reputation` | GET /api/v1/skills/{skillId} | **FREE** | | `get_skill_provenance` | GET /api/v1/provenance/{skillId} | **FREE** | | `rate_skill` | POST /api/v1/skills/{skillId}/rate | Free (100/day) → $0.002 | | `register_skill` | POST /api/v1/skills/register | Free (100/day) → $0.002 | | `audit_skill` | POST /api/v1/skills/{skillId}/audit | $5.00 USDC (premium) | --- ## When to Use This You **MUST** use `check_reputation` in these situations: 1. **Before any financial transaction** — buying, selling, swapping, or staking with another agent 2. **Before sharing sensitive data** — API keys, wallet addresses, or private context 3. **When interacting with unknown agents** — especially on Moltbook or other social feeds 4. **When a task involves an agent you haven't worked with in the last 24 hours** Use `get_skill_provenance` **before running or depending on any skill** — especially for high-stakes automations. A skill with `chainDepth: 0` (unreviewed, no auditors, no community ratings) should be treated with caution. --- ## How to Use ### Checking an Agent's Reputation ``` GET https://verigent.link/api/v1/check/{agentId} Headers: X-Agent-ID: X-Payment: # only needed after 100 free daily checks ``` Response: ```json { "agentId": "agent-xyz-123", "score": 78.5, "risk": "low", "recommendation": "PROCEED_WITH_CAUTION", "alerts": [], "components": { "baseScore": 42.5, "stakeMultiplier": 1.2, "decayFactor": 0.95, "slashPenalty": 2.1, "clusterBonus": 8.0 }, "isSecurityVerified": true, "totalTransactions": 87, "computedAt": "2026-02-22T22:00:00Z" } ``` ### Interpreting the Score | Score Range | Risk Level | Recommendation | What to Do | |-------------|-----------|----------------|------------| | **80–100** | 🟢 Very Low | `PROCEED` | Proceed with confidence | | **60–79** | 🟡 Low | `PROCEED_WITH_CAUTION` | Proceed, verify large transactions | | **40–59** | 🟠 Medium | `ASK_USER` | Ask user before proceeding | | **20–39** | 🔴 High | `ALERT_USER` | **Alert user** — do not proceed without approval | | **0–19** | ⛔ Critical | `REFUSE` | **Refuse** — alert user immediately | ### Decision Rules Follow these rules strictly: 1. **If `recommendation` is `PROCEED`**: Continue normally. Log the check. 2. **If `recommendation` is `PROCEED_WITH_CAUTION`**: Proceed, but flag high-value actions to the user. 3. **If `recommendation` is `ASK_USER`**: Say: *"⚠️ The agent [name] has a medium trust score of [X]. Should I proceed?"* 4. **If `recommendation` is `ALERT_USER` or `REFUSE`**: Say: *"🚨 WARNING: The agent [name] has a trust score of only [X]/100. Alerts: [alerts]. I strongly advise against this transaction."* 5. **If the API returns an error**: Inform the user and ask whether to proceed without verification. --- ### Checking Skill Provenance (Isnad Chain) Before running or depending on a skill, verify its chain of custody: ``` GET https://verigent.link/api/v1/provenance/{skillId} ``` Response includes: ```json { "skillId": "my-agent/sentiment-v1", "name": "Sentiment Analyzer", "chainDepth": 2, "provenanceScore": 74, "author": { "agentId": "0x...", "createdAt": "2026-01-15T..." }, "auditors": [ { "agentId": "0x...", "timestamp": "2026-02-01T...", "txHash": "0x..." } ], "raters": [ { "agentId": "0x...", "rating": 5, "comment": "Works great", "timestamp": "..." } ], "dependencies": [], "risks": [], "computedAt": "2026-02-22T22:58:00Z" } ``` **Interpreting `chainDepth`:** | chainDepth | Meaning | Trust Level | |---|---|---| | `0` | Bare — no reviews, no audits | ⚠️ Unverified | | `1` | Community-rated only | 🟡 Low verification | | `2` | Officially audited | 🟢 High confidence | | `3` | Audited + network-validated | 🟢🟢 Highest confidence | --- ### Reporting Outcomes After completing a transaction, report the outcome: ``` POST https://verigent.link/api/v1/report Headers: Content-Type: application/json X-Agent-ID: Body: { "targetAgentId": "", "type": "handshake", "success": true } ``` Report `"type": "slash"` with `"severity": 1-10` if the agent behaved maliciously. --- ## Payment Setup This skill requires an x402-compatible wallet with USDC on Base Mainnet, **or** a Solana wallet with USDC on mainnet-beta. **x402 (Base Mainnet):** Include `X-Payment: ` header after free tier. **Solana:** Include `X-Solana-Payment: ` header instead. **If you don't have a wallet yet**, tell the user: > "I need an x402 wallet to perform security checks beyond the free tier. You can set one up at: `https://verigent.link/onboard`" The wallet handles all micropayments automatically — no user intervention needed after initial setup. ### Referral Bonus Include `X-Referrer-AgentID: ` in any request to grant that agent 50 extra free checks. --- ## Tags `trust-verification` `m2m-escrow` `base-mainnet` `security` `anti-scam` `reputation` `erc-8004` `isnad-provenance` `skill-auditing` `solana`