# MTA-STS and TLS-RPT Check

> MTA-STS and TLS-RPT Check is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Checks a domain's MTA-STS policy and TLS-RPT reporting record to determine if inbound email is protected against downgrade attacks.

## Facts

- Endpoint: GET https://intel.rallylive.ca/email/mta-sts
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mta-sts-and-tls-rpt-check-b898dc44
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Azg7PXmOezwGCv6kc50g9

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 mta-sts-and-tls-rpt-check-b898dc44
```

Example prompt: Can you check whether example.com has MTA-STS configured — I want to know the policy mode, which MX hosts are listed, the max_age, and whether the TLS reporting record is set up?

## When to prefer this

Use this endpoint when you need a combined check of both MTA-STS policy (DNS record + hosted policy file) and TLS-RPT reporting configuration for a domain in a single call. Prefer it over manual DNS lookups when you want a parsed, human-readable summary of the policy mode, allowed MX, max_age, and reporting setup — especially for bulk domain audits at $0.01 per domain.

## Known failure modes

- Domain does not exist — DNS lookup fails
- No _mta-sts DNS record found — policy absent
- Policy file not reachable at mta-sts.<domain> — HTTP fetch fails
- Policy file malformed or missing required fields
- No _smtp._tls TLS-RPT record found
- Payment not processed — 402 response if x402 payment is missing

## How this service works

MTA-STS and TLS-RPT check for a domain: the _mta-sts DNS record, the published policy file (mode enforce/testing/none, allowed MX, max_age) fetched from mta-sts.<domain>, and the _smtp._tls TLS reporting record. Tells you if inbound email is protected against downgrade attacks. $0.01 per domain.

## Output

Returns the _mta-sts DNS record, the fetched MTA-STS policy file contents (including mode: enforce/testing/none, allowed MX hostnames, and max_age), and the _smtp._tls TLS-RPT reporting record — along with an overall assessment of whether inbound email is protected against downgrade attacks.

## 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": {}
    }
   },
   "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/mta-sts-and-tls-rpt-check-b898dc44/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from intel.rallylive.ca](https://www.zero.xyz/host/intel.rallylive.ca/llms.txt)