# Contact Preflight

> Contact Preflight is a paid API for AI agents from api.amerosagent.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-24).

Checks domain-level email deliverability signals (MX provider, SPF, DMARC) and returns structured risk scores without verifying mailbox existence.

## Facts

- Endpoint: GET https://api.amerosagent.com/v1/contact-preflight?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/contact-preflight-c4b0020b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_t8Ez2uhDThnIk0m5hz1-K

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 contact-preflight-c4b0020b
```

Example prompt: Before I add john.doe@acmecorp.com to my outreach list, can you run a domain preflight check on it — I want to know the MX provider, whether SPF and DMARC are set up, and what the overall risk looks like?

## When to prefer this

Use this endpoint when you need lightweight, fast domain-level email risk assessment before sending messages, adding contacts to a CRM, or approving user signups — without needing (or triggering) a full SMTP mailbox probe. Ideal for bulk pre-screening workflows where you want to filter obviously bad or risky domains cheaply before investing in deeper verification.

## Known failure modes

- Invalid or malformed email address returns a validation error
- Domain with no MX records may return a high-risk signal or empty MX field
- DNS lookup timeout may cause delayed or failed response
- Non-existent domain returns an error or maximum risk signal
- Missing email query parameter returns a 400 bad request

## How this service works

Domain-level contact preflight with MX provider, SPF, DMARC and structured risk signals. Does not claim mailbox existence.

## Output

Returns structured domain-level signals including the MX provider name, SPF record presence and policy, DMARC policy details, and risk score indicators. Does not confirm whether the specific mailbox exists — only assesses the domain's email infrastructure health and associated risk level.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "email"
     ],
     "properties": {
      "email": {
       "type": "string",
       "description": "Email address to assess"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/contact-preflight-c4b0020b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.amerosagent.com](https://www.zero.xyz/host/api.amerosagent.com/llms.txt)