GET usp.br HTTP 2001.1 s17.2 KB$0.000064 captured Aug 7, 2026
usp.br, as data
One API turns any usp.br page into markdown, structured JSON, its link graph or a screenshot, and crawls the whole site the same way. The panel shows the real response we captured.
- Render mode
- Plain HTTP, no browser needed
- Response
- HTTP 200 in 1.1 s
- Page size
- 17.2 KB of markdown, 1,668 lines
- Fields
- Image, Links, Main Content
- Captured
- Aug 7, 2026
Free balance on signup, no card. This usp.br page cost $0.000064 to fetch.
### > Visualization> The visualization of a stereogram requires an unusual skill:> each eye must be targeted to distinct places on the image. This> is unusual to our brains. That is the reason some people hardly(or can not) see stereograms.> There are two ways to visualize stereograms:> The target of each eye (left and right) is shown:|> regular visualization - no stereogram|> divergent visualization of a stereogram|> convergent visualization of a stereogram(cross)> Once one gets the divergent or convergent visualization, he/shehas a clear view of 3D surfaces.* > Transparent media (stereogram on a plastic film)* > Reference point between the eyes and stereogram (put apen in the half way from your eyes to the stereogram)## Random Dot Stereogram> Our brain is able to perceive the 3D information of the environment.> The main reason for that are small differences between each eye> image. Both images are captured with a small difference (the> distance between our eyes). This results in very small shifts on> each retina projection image, hard to notice. But althoughsmall, those differences give us the 3D sensation.### > Creating a Random Dot Stereogram> The easiest way to learn how a stereogram works is to create> one. Next, the recipe to generate a random dot stereogram> (adapted from Bela Julesz article). There is also a second> approach, based on "ASCII Stereogram". With the ASCII> Stereogram, it is easier to understand the disparity shifts. Youcan see both as stereograms, if you have skill enough.|**> Steps to generate a stereogram:> ABCDEFGHI> JKLMNOPQR> STUVWXYZ0> 123456789> 0ZYXWVUTS> RQPONMLKJIHGFEDCBA|> (b) Duplicate the image and put side byside> ABCDEFGHI ABCDEFGHI> JKLMNOPQR JKLMNOPQR> STUVWXYZ0 STUVWXYZ0> 123456789 123456789> 0ZYXWVUTS 0ZYXWVUTS> RQPONMLKJ RQPONMLKJIHGFEDCBA IHGFEDCBA> ABCDEFGHI ABCDEFGHI> JKLMNOPQR JKLMNOPQRSTU> UTS> RQPONMLKJ RQPONMLKJIHGFEDCBA IHGFEDCBAWhat Spider does on usp.br
Same key, five endpoints. The numbers under a cell were measured on this page.
Page to markdown
Clean text for RAG and LLM context, boilerplate removed. The lane that runs without a key.
1.1 s · $0.000064Page to JSON
Spider reads the page and names the fields. Pass your own schema when you need exact keys.
Rendered capture
Real Chromium, full-page PNG. The same call also returns the rendered HTML.
The call behind the panel
This request produced the response above. Paste it with your key and you get the same bytes.
curl -X POST https://api.spider.cloud/scrape \
-H "Authorization: Bearer $SPIDER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"url": "https://www.ime.usp.br/~otuyama/stereogram/basic/index.html", "return_format": "markdown"}'from spider import Spider
app = Spider()
params = {"return_format": "markdown"}
page = app.scrape_url("https://www.ime.usp.br/~otuyama/stereogram/basic/index.html", params=params)
print(page[0]["content"])import { Spider } from "@spider-cloud/spider-client";
const app = new Spider();
const [page] = await app.scrapeUrl("https://www.ime.usp.br/~otuyama/stereogram/basic/index.html", {
return_format: "markdown",
});
console.log(page.content);What usp.br costs
Multiplied from the measured 17.2 KB page. Estimates round to the cent.
1 GB of transfer costs $1, plus $0.001 per CPU minute, and failed requests cost $0. Crawling daily? The Unlimited plan is a flat monthly rate.
Point this at the rest of usp.br.
The capture above took 1.1 s and cost $0.000064. The same call takes any URL on usp.br.