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.

Cert Types

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).

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 0xyour_wallet at 1740000000000",
    "timestamp": 1740000000000
  }'

Response:

{
  "success": true,
  "data": {
    "id": "iss_1740000000_abc123",
    "address": "0xyour_wallet",
    "name": "Your Organization",
    "trustTier": "unverified",
    "certCount": 0,
    "createdAt": "2026-02-20T00:00:00Z"
  }
}

Save your issuer id — needed for API key generation.

Step 2: Generate API Key

Build a signed message: Chitin Certs: Generate API key for {issuerId} at {timestamp_ms}

curl -X POST https://certs.chitin.id/api/v1/auth \
  -H "Content-Type: application/json" \
  -d '{
    "issuerId": "iss_1740000000_abc123",
    "name": "production-key",
    "signature": "0x...",
    "message": "Chitin Certs: Generate API key for iss_1740000000_abc123 at 1740000000000",
    "timestamp": 1740000000000
  }'