# Email Deliverability Checker

> Email Deliverability Checker is a paid API for AI agents from api.strale.io, paid per call via x402, $0.054001/call, status unknown (last checked 2026-10-10).

Checks email deliverability for a domain by validating SPF, DKIM, DMARC, MX records and blacklist status, returning a 0-100 deliverability score

## Facts

- Endpoint: GET https://api.strale.io/x402/email-deliverability-check?utm_source=zero.xyz
- Price: $0.054001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-strale-io-cb550b43
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RUPgujKquilNjECCDLTYs

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 api-strale-io-cb550b43
```

Example prompt: Can you run a full email deliverability check on acme.com — I want to know the SPF, DKIM, DMARC, and MX record status, whether it's blacklisted, and the overall deliverability score?

## When to prefer this

Use this endpoint when you need a comprehensive, scored audit of a domain's email deliverability posture including all major authentication records (SPF, DKIM, DMARC) and blacklist status in a single call, rather than checking individual DNS records manually

## Known failure modes

- Invalid or non-existent domain returns an error
- Domain without any email records may return low score with missing record details
- Network timeout if DNS lookups are slow
- Malformed domain input may return 400 bad request

## How this service works

Check email deliverability for a domain: SPF, DKIM, DMARC, MX records, blacklist status. Returns 0-100 score.

## Output

Returns a 0-100 deliverability score along with the status of SPF, DKIM, DMARC, and MX DNS records, plus blacklist check results for the queried domain

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "domain": "example.com"
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "spf": {
  "type": "object"
 },
 "dkim": {
  "type": "object"
 },
 "dmarc": {
  "type": "object"
 },
 "grade": {
  "type": "string"
 },
 "score": {
  "type": "number"
 },
 "blacklisted": {
  "type": "boolean"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-strale-io-cb550b43/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.strale.io](https://www.zero.xyz/host/api.strale.io/llms.txt)