Gypsum Context API
Second OpenAPI published by Voyant.io, discovered 2026-08-13 at https://www.voyant.io/openapi-gypsum.json (HTTP 200, application/json, 36,964 bytes). A clean 26-operation, 7-tag cut of the brand-context surface — messaging, positioning, personas, products, use cases, industries and testimonials context reads, plus ICP CRUD, campaign management and a brand-aware AI chat endpoint. Ownership is proven by the spec's own contents: info.contact.name "VoyantIO", info.contact.url https://voyant.io, and a first-party servers[] host. IMPORTANT — the declared production host `gypsum.voyant.io` does NOT resolve (NXDOMAIN from both 8.8.8.8 and 1.1.1.1, while the apex voyant.io resolves to 76.76.21.21), so this contract is real and first-party but currently has no callable address. The spec declares no securitySchemes at all; auth is described in prose only, as a `user_id` query parameter carrying the Clerk organization ID.