# x402.outpimp.com URL Validator

> x402.outpimp.com URL Validator is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Checks whether a given string is a syntactically valid URL, catching malformed schemes, hosts, and encoding edge cases

## Facts

- Endpoint: POST https://x402.outpimp.com/isURL
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-outpimp-com-url-validator-ff66a2b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xb5h9KccAQTcOx3VCDLb8

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 x402-outpimp-com-url-validator-ff66a2b0 -d '<json body>'
```

Example prompt: Can you check whether 'http://exa mple.com/path?q=hello world' is a syntactically valid URL?

## When to prefer this

Choose this endpoint when you need fast, reliable syntactic URL validation that correctly handles edge cases like malformed schemes, improper hosts, and percent-encoding issues — especially when a simple regex check in-context would risk false positives or consume LLM tokens. Ideal for pre-flight checks in pipelines before making HTTP requests or storing user-submitted URLs.

## Known failure modes

- HTTP 400 returned when 'value' parameter is omitted from the request
- May return false for URLs that are semantically valid but use uncommon or non-standard schemes
- Does not check if the URL is reachable or resolves to a live resource — only syntax is validated
- Edge cases with internationalized domain names (IDN) may behave unexpectedly

## How this service works

URL validation API. Checks whether a string is a syntactically valid URL, catching malformed schemes, hosts, and encoding edge cases a naive check misses. Returns true or false.

## Output

Returns true if the input string is a syntactically valid URL (valid scheme, host, and encoding), or false if it is malformed. Returns HTTP 400 if the 'value' field is missing from the request body.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "value": {
   "type": "string",
   "description": "The string to validate as a URL."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-outpimp-com-url-validator-ff66a2b0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.outpimp.com](https://www.zero.xyz/host/x402.outpimp.com/llms.txt)