# Certo

> Open-source infrastructure for issuing, verifying, and managing Open Badges 3.0 and W3C Verifiable Credentials. Self-hostable, API-first, standards-compliant.

Certo lets organizations issue tamper-proof digital credentials (badges, certificates, diplomas) to recipients who can share and verify them publicly. Built on Open Badges 3.0 and W3C Verifiable Credentials standards.

## Key capabilities

- Issue Open Badges 3.0 credentials with cryptographic proof
- Verify credentials by URL or ID — publicly accessible, no login required
- Revoke and renew credentials
- Multi-tenant: multiple organizations in one deployment
- Batch issuance for large cohorts
- Self-hostable via Docker Compose or Kubernetes (Helm chart provided)
- Full REST API with versioning (`/api/v1`)
- Interactive CLI (`certo` command) and MCP server for AI assistants

## API

- [OpenAPI / Swagger UI](https://certo.schroedinger-hat.org/api/documentation)
- [API base URL](https://certo.schroedinger-hat.org/api/v1)
- [Verify a credential](https://certo.schroedinger-hat.org/api/credentials/{id}/verify) — GET, no auth required
- [Health check](https://certo.schroedinger-hat.org/api/health)
- [Prometheus metrics](https://certo.schroedinger-hat.org/api/metrics)

## MCP Server (for AI assistants)

Use Certo from Claude Desktop, Cursor, or VS Code Copilot:

```json
{
  "mcpServers": {
    "certo": {
      "command": "npx",
      "args": ["-y", "@certo/mcp"],
      "env": {
        "CERTO_API_URL": "https://certo.schroedinger-hat.org",
        "CERTO_API_TOKEN": "your-api-token"
      }
    }
  }
}
```

## Documentation

- [Overview](https://github.com/Schroedinger-Hat/certo/blob/main/docs/overview.md)
- [Architecture](https://github.com/Schroedinger-Hat/certo/blob/main/docs/architecture.md)
- [Self-Hosting Guide](https://github.com/Schroedinger-Hat/certo/blob/main/docs/self-hosting.md)
- [Kubernetes / Helm](https://github.com/Schroedinger-Hat/certo/blob/main/docs/kubernetes.md)
- [Backup & Restore](https://github.com/Schroedinger-Hat/certo/blob/main/docs/self-hosting.md#backup--restore)
- [Monitoring](https://github.com/Schroedinger-Hat/certo/blob/main/docs/monitoring.md)
- [Security](https://github.com/Schroedinger-Hat/certo/blob/main/docs/security.md)
- [Open Badges](https://github.com/Schroedinger-Hat/certo/blob/main/docs/open-badges.md)

## Source

- [GitHub repository](https://github.com/Schroedinger-Hat/certo)
- License: MIT