Realtime web data for AI agents

One fast API for crawling, scraping, search, and a real browser. Clean, structured data the moment your agents ask for it.

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# Example Domain

This domain is for use in illustrative examples in documents.
You may use this domain in literature without prior coordination
or asking for permission.

[More information…](https://www.iana.org/domains/example)

200204mssample

                   0010                                        1110
              0100001110                                      1001011000
           010111     110                                    101     000111
                       1100                                1101
                        1000                              1010
                          1101                          1101
                           1111                        0010
                            0111                      1101
           011101             1110                  0010             111011
        11010 100001           1110                0011           011000 11001
      1001       0010101        00011    0100    10100        0011100       0101
    1110            1110010       101000011100010111       1000000            0101
  111                   0110010    1101101101011000    0011101                   000
000                        10101001 10110011011011 11010110                        111
                              11001000101001011101011001
                                 10010010100101111010
                                  100101010110010000
             100000000001011100110001010111101100011110010010010010110101
            01011110111010110010101101110011101100110001000010010101011101
          0000                     1111011011100110                     1011
         110                     100100        000010                     101
        111                   111110    001110    111010                   001
       01                   010001    0000001100    111110                   00
     100                  11101     00111110100001     00010                  011
    100                11000       0111101110001110       00111                110
   11                 1100        110110000111001101        0101                 11
  10                  11          011111101010011100          01                  11
 01                  100         11110101000111100001         001                  01
                    011          00001011101110011100          111
                    00           01011111000001010001           11
                   100           00011010101101010000           001
                  101            11010111010011010100            000
                  10             00101100011000101100             11
                 00              00110100111110001100              01
                011               100111011110110100               101
                01                000101100101111110                10
               00                  0000111101010100                  10
               01                   01000110110100                   11
                                      1110000101

Native integrations with the leading AI frameworks

source.html 173.3 KB

<!doctype html>
<html lang="en-US" data-theme="light dark" data-renderer="Doc">
<head>
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⋯
<div class="page-layout__banner" data-scheme="">
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<header class="page-layout__header">
  <nav class="navigation" data-scheme="" data-open="false">
    <svg class="logo__image" width="83" height="24" viewBox="0 0 83 24" role="img">
      <path class="logo__letter" d="M9.4 0 2.81 21.17H.12L6.69 0H9.4Zm2.38 0v21.17H9.4V0h2.4Zm9.27 …
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      <nav class="menu">
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          <mdn-dropdown data-glean-toggle-open="menu_toggle: html"><template shadowroot="open" shad…

spider.md 11.7 KB

# Array.prototype.map()
Baseline
Widely available
This feature is well established and works across many devices and browser versions.…
The **`map()`** method of [`Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refere…
a new array populated with the results of calling a provided function on
every element in the calling array.
## [Try it](#try_it)
```
`const array = [1, 4, 9, 16];
// Pass a function to map
const mapped = array.map((x) =\> x \* 2);
console.log(mapped);
// Expected output: Array [2, 8, 18, 32]
`
```
## [Syntax](#syntax)
js
```
`map(callbackFn)
map(callbackFn, thisArg)
`
```
### [Parameters](#parameters)
[`callbackFn`](#callbackfn)
A function to execute for each element in the array. Its return value is added as a single element…

Run it on your URL

Fidelity · Completeness · Freshness · Provenance

Measured, not promised: #1 on StealthBench V1, 84.5% across 71 anti-bot tasks, and the pages that fail bill $0.

Source · spider-rs/benchmark ↗ Proof per pillar

Fast, reliable, and low cost.

Spider was benchmarked against the leading alternatives on speed, reliability, and price. Point it at a whole domain and one request crawls 100K+ URLs — $0.03 per 1,000 pages on average.

Spider99.9%best

Firecrawl95.3%47× more misses

Bright Dataest.93.0%70× more misses

Higher is betterusable content returned

100K+: URLs per request10K req/min, no degradation
$0.03: Avg per 1,000 pagespay-as-you-go, no subscription
MIT: Open-source coreRust engine, self-host option

Agents onboard themselves.

No key, no signup: AI agents make the first request and find every other entrance below.

POST /scrape

curl -X POST https://api.spider.cloud/scrape -H "Content-Type: application/json" -d '{"url": "https://example.com", "return_format": "markdown"}'

Teams shipping with Spider.

What engineers said on the internet, unedited.

GitHub discussions Discord chat

@iammerrick

Rust based crawler Spider is next level for crawling & scraping sites. So fast. Their cloud offering is also so easy to use. Good stuff. https://github.com/spider-rs/spider

@WilliamEspegren

Web crawler built in rust, currently the nr1 performance in the world with crazy resource management Aaaaaaand they have a cloud offer, that's wayyyy cheaper than any competitor Name a reason for me to use anything else? github.com/spider-rs/spid…

@gasa

@spider_rs is the best crawling tool i have used. I had a complicated project where i needed to paste url and get the website whole website data. Spider does it in an instant

@Ashpreet Bedi

@spider_rs is THE best crawler out there, give it a try

@Troyusrex

I found a new tool, Spider-rs, which scrapes significantly faster and handles more scenarios than the basic scraper I built did. Our use of Spider-rs and AWS infrastructure reduced the scraping time from four months to under a week.

@Dify.AI

Spider @spider_rust can be used as a built-in tool in #Dify Workflow or as an LLM-callable tool in Agent. It allows fast and affordable web scraping and crawling when your AI applications need real-time web data for context.

Common questions.

Data quality, billing, and crawl failures.

What is Spider?

A fast crawling and scraping API for AI agents, RAG, and LLMs — structured data as markdown, HTML, JSON, or text.

How can I try Spider?

Grab a free balance, or run the open-source engine at github.com/spider-rs/spider.

What formats can Spider convert web data into?

HTML, raw, text, and markdown — delivered as JSON, JSONL, CSV, or XML.

Can you crawl all pages?

Yes, no sitemap needed. We rate-limit per URL to spare the target server.

Does it respect robots.txt?

On by default; disable it per request when you need to.

What if a crawl fails?

Failed requests bill $0 — you only pay for responses that return data.

What if I get blocked?

The Unblocker rotates proxies and retries; hard sites route to full stealth browser sessions.

How does billing work?

Bandwidth ($1/GB) plus compute ($0.001/min) — most pages cost a fraction of a cent. Estimate at /compare.

What does research-grade mean?

Measured: #1 on StealthBench V1, 84.5% across 71 anti-bot tasks, from an open 1,000-URL benchmark. Reproduce every number on GitHub.

How does Spider handle pages it can't fetch?

A failed request bills $0 — you pay only for data that arrives.

Can an AI agent use Spider without a human?

Yes. Hit /scrape with no key for a sample, use the MCP server at mcp.spider.cloud, or pay per request in USDC via x402 — no account needed.