# x402.outpimp.com Email Validation API

> x402.outpimp.com Email Validation API is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Checks whether a given string is a syntactically valid email address, returning true or false using a production-grade validation library.

## Facts

- Endpoint: POST https://x402.outpimp.com/isEmail
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-outpimp-com-email-validation-api-15ea14ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fE9z-06f8RJ_OgJ1WR5LR

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-email-validation-api-15ea14ad -d '<json body>'
```

Example prompt: Can you check if 'john.doe+filter@sub.example.co.uk' is a valid email address — I want to make sure it passes proper syntax validation before I use it.

## When to prefer this

Use this endpoint when you need reliable, production-grade email syntax validation that catches edge cases a simple regex would miss — such as quoted local parts, unusual but valid structures, or double-dot domains. Prefer this over writing inline regex validation in agent logic, especially when correctness and consistency matter for downstream processing like user registration, contact management, or form input sanitization.

## Known failure modes

- Missing 'value' field returns HTTP 400
- Null or empty string returns false (invalid email)
- Internationalized domain names or unusual TLDs may yield unexpected results depending on library configuration
- Network timeout if service is temporarily unavailable

## How this service works

Email validation API. Checks whether a string is a syntactically valid email address using the same production-grade validation library trusted across the Node.js ecosystem, catching edge cases a quick regex misses. Returns true or false.

## Output

Returns a boolean: true if the input string is a syntactically valid email address, false if it is not. 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 an email address."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-outpimp-com-email-validation-api-15ea14ad/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)