# DMARC Check

> DMARC Check is a paid API for AI agents from relay402.georgespring.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Looks up and parses the DMARC TXT record for a domain, returning its policy mode and aggregate-reporting configuration for email trust decisions.

## Facts

- Endpoint: GET https://relay402.georgespring.workers.dev/api/web-dmarc-check
- 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/dmarc-check-4ab606d0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z4zRyeoD5yHQMJL8FDJ_X

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 dmarc-check-4ab606d0
```

Example prompt: Can you check the DMARC record for sendgrid.com and tell me what policy mode it's using and whether aggregate reporting is configured?

## When to prefer this

Use this endpoint when you need a focused, single-signal DMARC check — specifically the TXT record, policy mode, and rua address — without the overhead of a full email trust report. It's ideal when you want a quick, cheap per-domain signal to gate email trust decisions in automated workflows. Prefer the sibling 'Email trust report' endpoint if you also need MX and SPF data combined in a single call.

## Known failure modes

- Domain has no DMARC TXT record — returns empty or not-found result
- Domain does not exist or is unreachable in DNS — DNS resolution error
- Invalid domain format supplied — rejected by input schema pattern validation
- DMARC record is malformed or unparseable — partial result or parse error returned
- Network or upstream DNS timeout — transient failure

## How this service works

DMARC check for a domain: finds the TXT record, policy mode and aggregate-reporting signal for email trust decisions.

## Output

Returns the raw DMARC TXT record found in DNS, the parsed policy mode (none, quarantine, or reject), and any aggregate reporting (rua) addresses configured, giving a clear signal of the domain's email authentication posture.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "$schema": "https://json-schema.org/draft/2020-12/schema",
     "required": [
      "domain"
     ],
     "properties": {
      "domain": {
       "type": "string",
       "pattern": "^[a-z0-9]([a-z0-9.-]{2,251})[a-z0-9]$"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dmarc-check-4ab606d0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from relay402.georgespring.workers.dev](https://www.zero.xyz/host/relay402.georgespring.workers.dev/llms.txt)