Verified Credentials is an open-source W3C-compliant SDK with on-chain attestation anchoring. Issue KYC, AML, and accredited investor credentials as signed JWTs and anchor their hashes on-chain for tamper-proof, publicly verifiable proof.
A complete credential infrastructure, not just a signing library.
Full Data Model v2.0 compliance. Issue credentials as JWTs with Ed25519 or secp256k1 signatures. Pydantic-validated schemas for KYC, AML, and AccreditedInvestor types.
Anchor credential hashes on Base (EVM). Any platform can verify attestation status on-chain without re-running compliance checks. Privacy by design (only hashes stored).
Private keys encrypted at rest with Fernet (HKDF-SHA256 derived). Keys never leave the server. Key rotation with version tracking so old credentials stay verifiable.
Stripe-powered metered billing with six plans. Free tier for development. Paid tiers unlock on-chain anchoring with overage billing via Stripe Meters.
Four issuer tiers with economic staking, dispute governance, reputation scoring, and verifier policy enforcement. Confidence scores from 0.0 to 1.0.
FastAPI server with three-tier role-based auth, rate limiting, webhook notifications, SD-JWT selective disclosure, and adaptive rate limiting under load.
Self-host for free, or use the managed API for on-chain proof.
Install from PyPI and run on your infrastructure. Full SDK with file-backed attestation.
Managed service at vercre.vectorguardlabs.com with on-chain attestation on the production contract.
From install to on-chain proof in four steps.
pip install vercre-sdk. The code is MIT licensed — use it freely in any project, self-host, or connect to the hosted API.
Call POST /api/v1/onboard to get a DID + API key. Issue KYC, AML, or AccreditedInvestor credentials as signed JWTs.
Subscribe to a paid plan and call POST /api/v1/chain/authorize. Your DID is authorized on the production contract.
Every credential you issue is anchored on Base. Any third party can verify attestation status via the smart contract or BaseScan.
Start free. Scale with on-chain proof when you need third-party verifiability.
Verify credentials at scale with confidence scoring and batch verification.
Ready to issue Verified Credentials? Let's talk about which plan fits your team.