Sigstore Fulcio API (consumed)
Fulcio is the Sigstore certificate authority that issues short-lived X.509 code-signing certificates bound to OIDC identities. Cosign calls the Fulcio public CA at fulcio.sigstore.dev during keyless signing to obtain a certificate for a verified identity. Ownership: Fulcio is a sibling project of Cosign inside the same GitHub organization (github.com/sigstore) and the same OpenSSF Sigstore project; its published contract at fulcio.swagger.json declares host fulcio.sigstore.dev, matching the baseURL below. It is recorded here as a CONSUMED dependency of the Cosign CLI, not as an API Cosign produces.