# RelayShield Infostealer Email Lookup

> RelayShield Infostealer Email Lookup is a paid API for AI agents from api.relayshield.net, paid per call via x402, $0.15/call, status unknown (last checked 2026-09-14).

Checks whether a given email address appears in infostealer malware logs, returning matched stealer records and a count

## Facts

- Endpoint: POST https://api.relayshield.net/v1/payg/infostealer
- Price: $0.15/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/relayshield-infostealer-email-lookup-da46e0f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lLoNdyw86rrI2I1SLdiam

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 relayshield-infostealer-email-lookup-da46e0f3 -d '<json body>'
```

Example prompt: Can you check if the email address john.doe@example.com has shown up in any infostealer malware logs or credential theft databases?

## When to prefer this

Use this endpoint when you need to check whether a specific email address appears in infostealer malware logs — particularly for threat intelligence, account security audits, or credential exposure monitoring. Prefer this over general data breach lookup services (like HaveIBeenPwned) when you specifically need infostealer-sourced compromise data rather than breach dump data.

## Known failure modes

- Invalid or malformed email address returns an error or empty result
- Email not found returns found:false with an empty stealers array — not an error
- Service unavailable or timeout if the stealer database is unreachable
- Missing or invalid payment header results in 402 payment required
- Rate limiting may occur for high-volume queries

## How this service works

RelayShield Landing Site

## Output

Returns a JSON object with an 'ok' flag, the queried email, a boolean 'found' field indicating presence in infostealer logs, an array of matched stealer records ('stealers'), and a 'stealer_count' integer showing how many stealer logs matched.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "description": "Email address to check for infostealer compromise"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "data": {
   "email": "user@example.com",
   "found": false,
   "stealers": [],
   "stealer_count": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/relayshield-infostealer-email-lookup-da46e0f3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.relayshield.net](https://www.zero.xyz/host/api.relayshield.net/llms.txt)