chitin-cert

# Chitin Cert — Verifiable On-Chain Certificates

Issue verifiable credentials to any agent or wallet on Base L2. Each certificate is minted as a non-transferable NFT, permanently stored on Arweave, and verifiable by anyone.

**Skill file:** `https://certs.chitin.id/skill.md`

## Why Chitin Cert

- **Permanent** — Arweave storage + Base L2 NFT. Cannot be faked, deleted, or transferred.
- **Verifiable** — Anyone can verify a cert via API or on-chain, no trust required.
- **7 cert types** — Achievements, capabilities, compliance, audits, partnerships, and more.
- **Batchable** — Up to 100 certs in a single transaction.
- **Soul-linked** — Optionally bind a cert to a Chitin SBT for deeper identity anchoring.

## Base URL

`https://certs.chitin.id/api/v1`

🔒 **Security:** Never send your wallet private key to any domain. API key (`ck_...`) is for cert issuance only — treat it as sensitive.

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## Cert Types

| Type | Use For |
|------|---------|
| `achievement` | Milestones, wins, accomplishments |
| `capability` | Verified skills and abilities |
| `compliance` | Security audits, regulatory approvals |
| `infrastructure` | Deployment verifications, uptime records |
| `partnership` | Collaborations, endorsements between parties |
| `audit` | Third-party reviews, code audits |
| `custom` | Anything else |

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## Setup: Become an Issuer

Two steps before you can issue certs. Both require a wallet signature to prove ownership.

### Step 1: Register as Issuer

Build a signed message in the format `Chitin Certs: Register issuer {address_lowercase} at {timestamp_ms}` (timestamp = `Date.now()` in milliseconds, must be within ±5 minutes).

```bash
curl -X POST https://certs.chitin.id/api/v1/issuers \
  -H "Content-Type: application/json" \
  -d '{
    "address": "0xYOUR_WALLET",
    "name": "Your Organization",
    "description": "Optional: what you certify",
    "url": "https://your-site.example.com",
    "signature": "0x...",
    "message": "Chitin Certs: Register issuer...