yangmao.ai · Free API intent page

StepFun Free API Guide

StepFun has a tracked free API path, with ¥10 and rate limit notes of 5 RPM.

Use one OpenLLMAPI key → Open official provider →

Quick verdict

Free API: ¥10
Rate limits: 5 RPM
Best model starting point: Step-2
China access: direct or relatively friendly

Provider fit matrix

Best fit Image generation prototypes, creative automation, and media workflows

Watch out Image/video credits can burn faster than chat tokens; test with small batches first

Production fallback Keep at least one compatible backup provider before shipping

Production readiness checklist

Quota gate Start inside ¥10; log usage before adding retries or batch jobs.

No-card check Try the free path first, then confirm whether billing is required for API keys, higher RPM, or production endpoints.

Regional smoke test Still run one request from your deployment region and from China if users are there.

Source freshness Snapshot date: 2026-05-16; official quota and pricing can change without notice.

Python setup snapshot

Start with the smallest possible chat completion, then move the key to your server-side secret manager before production.

from openai import OpenAI
client = OpenAI(api_key="your-key", base_url="https://api.stepfun.com/v1")
response = client.chat.completions.create(
    model="step-3.5-flash", messages=[{"role": "user", "content": "你好！"}])
print(response.choices[0].message.content)

cURL smoke test

Use this to verify endpoint, auth header, model name, response shape, and quota before adding SDK abstractions.

curl https://api.stepfun.com/v1/chat/completions \
  -H "Authorization: Bearer $STEPFUN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "Step-2",
    "messages": [{"role": "user", "content": "Hello from yangmao.ai"}]
  }'

Free API and pricing notes

¥10

¥10 free credits on signup

Access and production risk

China-friendly / direct path likely

StepFun, direct access in China. Step 3.5 Flash is extremely fast.

Decision checklist

Check StepFun free credits and rate limits.

Compare same-category providers and China access needs.

Pick the provider with the clearest no-card/free API path for testing.

Fallback CTA with tracked UTM

If you do not want to juggle provider keys, rate limits, and regional access, use openllmapi.com as a unified API fallback.

Try openllmapi with one key →

UTM: utm_source=yangmao.ai · utm_medium=seo · utm_campaign=provider · utm_content=stepfun-free-api

Source snapshot

Data source: yangmao.ai provider YAML tracker plus provider docs reviewed by the daily crawler. Official dashboards can change quota and pricing without notice; verify before production.

yangmao.ai provider id: stepfun
Official source: https://www.stepfun.com
Last updated: 2026-05-16
Free tier: No explicit limit
API credits: ¥10
Rate limit: 5 RPM
Access note: StepFun, direct access in China. Step 3.5 Flash is extremely fast.

FAQ

Does StepFun have a free API?

Yes. Current yangmao.ai record: ¥10. Rate limit note: 5 RPM.

Is StepFun OpenAI-compatible?

The recorded setup uses an OpenAI-compatible pattern or SDK-style call. Validate the latest base URL and model names in StepFun docs.

Can I use StepFun from China?

StepFun is marked as relatively direct or China-friendly in the current tracker.

What should I do when StepFun credits run out?

Compare the alternatives below, check /en/free-ai-api/, or use the openllmapi CTA on this page as a one-key fallback with tracked UTM: campaign=provider, content=stepfun-free-api.