StudioTwin MCP

Checked 7 Nov 2026: the endpoint is stateless Streamable HTTP, POST only, tools only. An anonymous initialize gets 401 'API key required'; a bad key in x-api-key gets 'Invalid API key', so the header is confirmed. The key is an st_... secret from the dashboard. The vendor publishes no client config, so the claude mcp add line above is built from the documented endpoint and header, not copied from their docs. The submission's `npx skills add realtwin/studiotwin-mcp-skill` installs an MIT guidance skill (v1.5.0), not a server; there is no npm package and no MCP Registry entry. Tool names are not published either: the docs say only `studiotwin_*`, discover live, and the operation families are cost estimate, credit balance, submit/poll/cancel jobs, asset upload, list and download. Credits per the How Credits Work page: motion 5 per action (HY Motion 1.0 or Kimodo), text/image-to-env-map 20/25 (FLUX.1-schnell), env map-to-world 80 (HY World 1.0), image-to-mesh 25 (Hunyuan3D 2.1), 45 (Tripo3D V3), 75 (P1) or 165 (P2), retopology 15/45, materials 20 or a resolution formula (Patina via fal), and SFX round(max(seconds,5) x 0.6) on ElevenLabs. ConceptLab images run 1 to 72 credits by quality. The homepage advertises 100 free credits a month; the docs give 50 until the profile is completed. Pro is unpriced and 'coming soon', and top-ups never expire. Import formats: meshes .glb, env maps .hdr/.png, materials as albedo, height, normal, roughness and metalness maps. Terms (21 Mar 2026, Delaware law): you keep whatever copyright you hold in outputs, and RealTwin gets a licence to use inputs and outputs, including for model training. RealTwin Solutions is a venture studio founded in 2019; StudioTwin is in early access. Compared with Meshy or Tripo it is broader (motion, HDRI, PBR and SFX on one balance) but owns none of the models it runs.