# Sindri Email Validation

> Sindri Email Validation is a paid API for AI agents from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

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

## Facts

- Endpoint: POST https://ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/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/sindri-email-validation-9a303f2b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xZ1mm7rFbjyaNr4EVPV1O

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 sindri-email-validation-9a303f2b -d '<json body>'
```

Example prompt: Can you check whether 'john.doe+tag@sub.example.co.uk' is a syntactically valid email address?

## When to prefer this

Use this endpoint when you need production-grade email syntax validation that catches edge cases a simple regex would miss, especially in Node.js-compatible pipelines or when you want a lightweight, single-purpose microservice without pulling in a full validation library. It is not a substitute for email deliverability or existence checks.

## Known failure modes

- Missing 'value' field in request body returns an error or undefined result
- Non-string input may cause unexpected behavior
- Network timeout on Lambda cold start
- Payment failure (402) if USDC balance is insufficient
- Validation only checks syntax, not whether the mailbox actually exists or is deliverable

## 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

A boolean value — true if the input string is a syntactically valid email address, false if it is not. No additional metadata or error details are returned beyond the pass/fail verdict.

## 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/sindri-email-validation-9a303f2b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws](https://www.zero.xyz/host/ppu43fkyhimq5fiqpmo42eh5ri0yypid.lambda-url.us-east-1.on.aws/llms.txt)