Riverflow 2 Fast API
Riverflow 2 Fast from $0.05 per image — the quick tier of the previous Riverflow generation.
The fast tier of the previous Riverflow generation. Quick design imagery from $0.05 per image across nine aspect ratios.
No credit card required. Takes 30 seconds.
Riverflow 2 Fast API pricing
Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.
| Billing | Price |
|---|---|
| Rate | $0.05/image |
| What it costs | Per job |
|---|---|
| 1 imagefrom default size | $0.05 |
| 100 imagesa product catalog batch | $5.00 |
| 1,000 imagesa month of app traffic | $50.00 |
2,400+
Developers
1.2M+
API calls served
100+
Endpoints
$0.01
Per call
Yep, that's it.
Try it live
Enter a prompt and generate an image with Riverflow 2 Fast.
Drop image or click to upload
For image-to-image editing
Riverflow 2 Fast specs
| Provider | Sourceful |
|---|---|
| Model ID | sourceful/riverflow-v2-fast |
| Endpoint | /v1/media/queue |
| Type | Image Generation |
| Aspect ratios | 1:1, 4:3, 3:4, 3:2, 2:3, 16:9, 9:16, 21:9, auto |
| Image input | Yes |
How to get a Riverflow 2 Fast API key
- 1
Create a free account
Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.
- 2
Create an API key
Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.
- 3
Call Riverflow 2 Fast
Send a request to /v1/media/queue with the x-api-key header and model "sourceful/riverflow-v2-fast".
- 4
Pay as you go
Usage is billed per request from your balance. Top up any amount; there is no subscription.
Strengths
About $0.05 per image with fast renders — the drafting tier of the Riverflow 2 generation.
Same product- and packaging-first framing as the Pro tier, at a fraction of the cost.
Square through 21:9 plus auto for consistent composition across tiers.
Supports uploading an image to restyle or refine.
Quick start
Copy this snippet and start making calls with Riverflow 2 Fast.
// Step 1: Submit job
const res = await fetch('https://api.yepapi.com/v1/media/queue', {
method: 'POST',
headers: {
'x-api-key': 'YOUR_API_KEY',
'Content-Type': 'application/json',
},
body: JSON.stringify({
"model": "sourceful/riverflow-v2-fast",
"prompt": "A clean flat-lay of stationery on a linen surface — kraft envelope, wax seal, brass pen — soft window light, muted neutral palette",
"options": {
"aspectRatio": "1:1"
}
}),
});
const { data } = await res.json();
const jobId = data.jobId;
// Step 2: Poll for result
const status = await fetch(`https://api.yepapi.com/v1/media/status/${jobId}`, {
headers: { 'x-api-key': 'YOUR_API_KEY' },
});
const { data: job } = await status.json();
// job.status: "pending" | "processing" | "completed" | "failed"
// job.result: { text?, image?, audio?, video? }Riverflow 2 Fast vs similar models
Every model below runs on the same API key — switch by changing the model ID.
| Model | Provider | Price |
|---|---|---|
| Riverflow 2 Fast | Sourceful | from $0.05/image |
| Riverflow 2.5 Fast | Sourceful | from $0.08/image |
| Riverflow 2 Pro | Sourceful | from $0.32/image |
| Riverflow 2.5 Pro | Sourceful | from $0.52/image |
| FLUX 3 Image Klein | Black Forest Labs | from $0.02/image |
| GPT Image 2 | OpenAI | from $0.02/image |
| GPT Image 1 Mini | OpenAI | from $0.02/image |
| GPT-5.4 Image 2 | OpenAI | from $0.02/image |
Why use Riverflow 2 Fast through YepAPI?
Riverflow 2 Fast API — quick design imagery from $0.05
Riverflow 2 Fast is the speed tier of Sourceful's previous image generation, useful for drafting layouts and packaging concepts before committing to a flagship render.
It runs on YepAPI's `/v1/media/queue` at roughly $0.05 per image with the same options as the Pro tier.
Start generating in 30 seconds
$5 free credit on signup. No credit card required. Pay per call.
What developers say
“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”
“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”
“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”
Frequently asked questions
The fast tier of the previous Riverflow generation. Quick design imagery from $0.05 per image across nine aspect ratios.
Riverflow 2 Fast costs from $0.05/image through YepAPI, billed per request with no monthly fee. For example, a 1 image (from default size) costs about $0.05.
Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for Riverflow 2 Fast and every other model — no separate Sourceful account or waitlist.
New YepAPI accounts in most countries get free signup credit, enough to test Riverflow 2 Fast without a card. After that you pay per request at the rates above — there is no subscription.
Use "sourceful/riverflow-v2-fast" as the model on /v1/media/queue. The short alias "riverflow-v2-fast" also works.
Ready to use Riverflow 2 Fast?
$5 free credit on signup. No credit card required. Pay per call.
Explore more models
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