# DDG Email Preflight Check

> DDG Email Preflight Check is a paid API for AI agents from agents.daedalusdevelopmentgroup.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Validates and pre-checks an email payload before sending, ensuring it meets required format and deliverability conditions

## Facts

- Endpoint: POST https://agents.daedalusdevelopmentgroup.com/v1/email/preflight?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ddg-email-preflight-check-bd364df8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AaWykADFGnjpof6wlQThZ

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 ddg-email-preflight-check-bd364df8 -d '<json body>'
```

Example prompt: Before I send this email, run a preflight check on the JSON body to make sure the payload is valid and will go through — the method is POST and the body type is JSON.

## When to prefer this

Use this endpoint when you need a lightweight, machine-payable preflight validation step for email payloads before committing to a full send operation, especially in automated agent pipelines where catching errors early is critical and the cost per check is minimal ($0.01 USDC).

## Known failure modes

- Missing required fields (input or output objects) returns a 400-level error
- Invalid bodyType enum value causes schema validation failure
- Malformed JSON body results in parse error response
- Payment not included or insufficient USDC causes 402 Payment Required
- Network timeout if the endpoint is temporarily unavailable

## How this service works

Machine-payable DDG services for AI agents. Current public live payment rails are x402 multi-chain USDC and direct-crypto auto/manual for public receiving-address families. MPP/Stripe/Tempo is installed but pending live provider env plus penny-settlement proof before any MPP-live advertisement. DDG sells bounded artifacts/results, not raw provider account access.

## Output

Returns a JSON object with an 'ok' boolean field indicating whether the preflight check passed, along with any validation details about the submitted email payload.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input",
  "output"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": true
  },
  "output": {
   "type": "object",
   "required": [
    "type",
    "example"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "ok": true
    }
   },
   "additionalProperties": true
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ddg-email-preflight-check-bd364df8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agents.daedalusdevelopmentgroup.com](https://www.zero.xyz/host/agents.daedalusdevelopmentgroup.com/llms.txt)