# Plus-Address Detection for Vendor Screening

> Plus-Address Detection for Vendor Screening is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Detects email sub-addressing (plus-addressing) in an email local part and returns the base mailbox, using DNS data only, for use in vendor screening workflows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/demand-domain-plus-address-check-vendor-screening?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/plus-address-detection-for-vendor-screening-51141f9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AAStb5amWpmPfbz0Bc3-V

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 plus-address-detection-for-vendor-screening-51141f9b -d '<json body>'
```

Example prompt: Check if the email address vendor+signup@acmecorp.com uses plus-addressing and tell me what the base mailbox is.

## When to prefer this

Choose this endpoint when you need to detect and normalize plus-addressed (sub-addressed) emails as part of vendor or supplier screening, without sending any email or verifying inbox existence. Prefer this over full email verification services when you only need structural and DNS-level detection of aliasing tricks, not deliverability checks.

## Known failure modes

- Invalid or malformed email input returns an error
- Emails with no plus-address return the original address unchanged
- DNS lookup failures may affect domain-level checks
- Ambiguous local parts (e.g. quoted strings with special chars) may not parse correctly

## How this service works

Plus-address detection for Vendor screening: Detect sub-addressing in an email local part and return the base mailbox. DNS data only; does not send email or verify that an inbox exists.

## Output

Returns the detected base mailbox extracted from the email's local part, along with an indicator of whether plus-addressing was found and the parsed components (tag, local part, domain). Uses DNS data only; does not send email or confirm inbox existence.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "email": {
   "type": "string",
   "default": "user@example.com",
   "description": "Email address to inspect."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/plus-address-detection-for-vendor-screening-51141f9b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)