Does StepFun have a free tier?
New accounts get a small trial credit (third-party trackers currently record ¥10 with a 5 RPM cap); after that it's prepaid pay-as-you-go — the console is authoritative.
StepFun: get an API key and write fiction with it on your phone
step-3.5-flash is among the fastest-streaming mainland models and connects directly in China — try it when you want continuations that start printing the moment you tap. This page is the BYOK quick answer for StepFun: key steps, direct console and pricing links, and the app-side notes that matter. Verified 2026-07-18.
Two links up front: get your key at the official console and check rates on the official pricing page. Prices and free quotas move; the official pages are authoritative.
What does it power inside Foreverse?
The factory preset declares 1 modality flag for StepFun. The models actually available come from the live catalog fetched in-app — catalogs move fast, and the flag only means the protocol wiring is ready.
| Modality | Used for |
|---|---|
| Text | Continuation · roleplay chat · agent |
How do I get a StepFun API key?
- Open platform.stepfun.com and register with a phone number.
- Go to account management → interface keys, create a key, and copy it.
- New accounts usually carry a small trial credit — test-drive step-3.5-flash first, then top up when you commit.
Key in hand: three steps to connect
- Open the app's Settings → AI models & services and find StepFun in the list (one of 62 presets, with logo and search).
- Paste the key and tap the connectivity test — it fires one real request to verify key and network, and pulls back the model list while it's at it.
- Enable the models you want, then set per-modality defaults (text, image, speech, and video each get their own); continuation, chat, and listening route through them from then on.
The one universal host pitfall: the API host must include its full version prefix (this provider's exact form is in the notes below) — the app never appends /v1 for you.
StepFun-specific notes
The preset host is https://api.stepfun.com/v1, standard OpenAI-compatible; text model ids look like step-3.5-flash. The separate Step Plan subscription (agent/coding bundles) is a different billing track — BYOK uses the metered key from the interface-keys page.
FAQ
Where does the key live once I paste it into the app?
It's stored on your device only, under system-level encryption — never uploaded or synced to any Foreverse server. Requests go straight from your phone to the provider's official endpoint with zero markup. To revoke access, delete the key in the provider's console.