# Delx Disposable Domain Heuristic

> Delx Disposable Domain Heuristic is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Checks whether a given domain name is a known disposable or temporary email domain.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/disposable-domain-heuristic
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-disposable-domain-heuristic-15f0fe50
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sj-LpHQOh7PO7snHwy479

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 delx-disposable-domain-heuristic-15f0fe50 -d '<json body>'
```

Example prompt: Can you check if mailinator.com is a disposable email domain so I can decide whether to block signups from it?

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.001 per call) single-domain disposable email check without standing up your own blocklist. It is ideal for agent pipelines that process signups, leads, or form submissions and need to screen throwaway email addresses in real time. Prefer this over building or maintaining your own disposable domain list, or when you need a lightweight microservice call rather than a full email verification suite.

## Known failure modes

- Missing or empty domain field returns a validation error
- Unknown or very new domains may not be in the heuristic database and could return false negatives
- Domains with ambiguous classification may not be correctly flagged
- Malformed domain strings (e.g. with protocol prefixes) may cause unexpected results

## How this service works

Heuristic disposable mailbox domain flag from a static list. Call when cheap disposable email filter without external APIs. Returns is_disposable heuristic as deterministic JSON for $0.001 USDC via x402 on Base. First-party local math only—no RPC, live market feed, API keys, storage, or mediagen. Advisory only; the caller owns capital, risk, and production controls.

## Output

Returns a JSON object containing the queried domain, a schema identifier ('delx/util-disposable-domain-heuristic/v1'), and a boolean 'is_disposable' field indicating whether the domain is classified as a disposable or temporary email provider.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "domain": {
   "type": "string",
   "description": "Domain name"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "domain": "mailinator.com",
  "schema": "delx/util-disposable-domain-heuristic/v1",
  "is_disposable": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-disposable-domain-heuristic-15f0fe50/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)