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GET prolific.com HTTP 200186 ms3.3 KB$0.000261 captured Aug 7, 2026

prolific.com, as data

One API turns any prolific.com 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.

target profile from the capture
Render mode
Plain HTTP, no browser needed
Response
HTTP 200 in 186 ms
Page size
3.3 KB of markdown, 62 lines
Fields
Business Name, Address, Phone, Category and 2 more
Captured
Aug 7, 2026

Free balance on signup, no card. This prolific.com page cost $0.000261 to fetch.

response 200 · 186 ms · 3.3 KB
# Real human data. Ready in minutes.### Evaluate and train AIHuman feedback from representative populations - for preference tuning, safety evals, and benchmarks you can defend.](https://prolific.com/ai)[### Accelerate your researchReach breakthroughs faster with insights from verified participants](https://prolific.com/researchers)[### Get paid to take studiesJoin paid online studies. Quick signup, flexible schedule, real payouts.](https://prolific.com/participants)Human feedback from representative populations - for preference tuning, safety evals, and benchmarks you can defend.Reach breakthroughs faster with insights from verified participantsJoin paid online studies. Quick signup, flexible schedule, real payouts.Trusted by thousands of organizations## How customers use ProlificTrusted by AI/ML developers, researchers, and leading organizations across industry and academia.The HUMAINE framework - Unpacking human preference for LLMsThe evaluation of large language models faces significant challenges. Technical benchmarks often lack real-world relevance, while existing human preference evaluations suffer from unrepresentative sampling, superficial assessment depth, and single-metric reductionism.Building breakthrough AI fasterAi2 reduced human data collection from weeks to hours with Prolific, building state-of-the-art multimodal AI models faster without sacrificing quality.Redefining environmental decision-makingHigh-quality insights from Prolific participants enabled researchers at Columbia University to explore how people make choices when fighting climate change.Making AI more democratic with human perspectivesThe Collective Intelligence Project used Prolific to bring voices from 70+ countries into the heart of AI governance.
POST /scrape · prolific.com/index.md · markdown · 62 lines · captured Aug 7, 2026

What Spider does on prolific.com

Same key, five endpoints. The numbers under a cell were measured on this page.

/scrape

Page to markdown

Clean text for RAG and LLM context, boilerplate removed. The lane that runs without a key.

186 ms · $0.000261
/fetch

Page to JSON

Spider reads the page and names the fields. Pass your own schema when you need exact keys.

/crawl

Whole site

Follows prolific.com's own links, respects robots, streams pages as they land.

/links

Link graph

Every internal and external URL on a page, before you decide what to fetch.

/screenshot

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.

request scrape.sh
curl -X POST https://api.spider.cloud/scrape \
  -H "Authorization: Bearer $SPIDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://prolific.com/", "return_format": "markdown"}'
plain request · no browser, no selectors

What prolific.com costs

Multiplied from the measured 3.3 KB page. Estimates round to the cent.

cost measured
This page, once 3.3 KB over HTTP, measured $0.000261
This page, daily for a month 30 fetches at the measured price ≈ $0.00784
1,000 pages this size 3.2 MB at the measured price ≈ $0.26
10,000 pages this size 31.9 MB at the measured price ≈ $2.61

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 prolific.com.

The capture above took 186 ms and cost $0.000261. The same call takes any URL on prolific.com.

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