# Email Reputation & Deliverability Check

> Email Reputation & Deliverability Check is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Returns detailed reputation data for an email address including deliverability status, quality score, and risk indicators.

## Facts

- Endpoint: GET https://x402.orthogonal.com/email-reputation/v1
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/email-reputation-deliverability-check-913bed66
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XlqmfwMBvo88Z3YAHd1p4

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 email-reputation-deliverability-check-913bed66
```

Example prompt: Can you check the reputation of the email address john.doe@example.com and tell me if it's deliverable, what its quality score is, and whether there are any fraud or risk flags associated with it?

## When to prefer this

Choose this endpoint when you need comprehensive email reputation data — including deliverability, quality scoring, and fraud/risk signals — in a single call, especially in agentic workflows where you need to make automated decisions (e.g. block signups, filter leads, pre-screen lists) based on email quality. It is well-suited for per-address lookups at low cost ($0.005/call) rather than bulk list validation.

## Known failure modes

- Missing or malformed email query parameter returns a validation error
- Non-existent domain in email address may return low quality score or undeliverable status
- Rate limiting or payment failure (402) if USDC balance is insufficient
- Ambiguous results for newly created domains with no reputation history
- Some privacy-protected or catch-all domains may return inconclusive deliverability signals

## How this service works

Get detailed reputation data for an email address including deliverability, quality score, and risk indicators.

## Output

Returns structured reputation data for the queried email address, including deliverability status (whether the address can receive mail), a quality score (numeric indicator of overall address health), and risk indicators such as whether the address is disposable, domain-level blacklisting, spam trap likelihood, or other fraud signals.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "email": {
       "type": "string",
       "description": "The email address to validate"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/email-reputation-deliverability-check-913bed66/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)