# agentshelf.syntexa.ch HTTP(S) URL Extractor

> agentshelf.syntexa.ch HTTP(S) URL Extractor is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-10-23).

Extracts up to 20 http/https URLs from a given text string using regex matching, returning all found URLs

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/regex-url?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentshelf-syntexa-ch-http-s-url-extractor-67eb169c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_j4wJutQ7pXcq4xrIWGMkP

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability agentshelf-syntexa-ch-http-s-url-extractor-67eb169c -d '<json body>'
```

Example prompt: Can you pull out all the http and https URLs from this text for me: 'Check out https://example.com and also visit http://foo.bar/path?q=1 for more info'?

## When to prefer this

Use this endpoint when you need programmatic, regex-based extraction of http/https URLs from text and you require up to 20 matches. It performs no network requests, so it is purely a text-processing operation — ideal when you already have the raw text in hand. Prefer the unpaid sandbox alternative at POST /v1/sandbox/regex-url for testing or when cost matters. Choose this over markdown-link or HTML scraping endpoints when you need raw URL strings from arbitrary text rather than structured markup.

## Known failure modes

- Empty match list returned when text contains no URLs — still billed $0.009 USDC
- Text exceeding 100,000 characters will be rejected
- Text shorter than 1 character (empty string) is rejected by schema
- Payment failure or insufficient USDC balance prevents the call from completing
- Malformed or non-http(s) URLs (e.g. ftp://) will not be matched

## How this service works

Call when an agent needs http(s) URLs extracted from text, capped at 20 matches. An empty match list is billed. No network. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/regex-url first.

## Output

Returns a list of up to 20 matched http/https URLs found in the submitted text. If no URLs are present, an empty match list is returned. The call is billed regardless of whether any matches are found.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "examples": [
    "https://example.com/a"
   ],
   "maxLength": 100000,
   "minLength": 1,
   "description": "Input for this SKU. The route description says whether it is plain text, a URL, base64 bytes, or an already-encoded token."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentshelf-syntexa-ch-http-s-url-extractor-67eb169c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)