# DKIM Selector Lookup – Constant Contact

> DKIM Selector Lookup – Constant Contact is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).

Looks up and parses the DKIM public key for the 'constantcontact' selector of a given domain, reporting key type, length, testing flag, and revocation status.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/dkim/constantcontact?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dkim-selector-lookup-constant-contact-5a5521ab
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0jQ1uPYDoGbDyi3XlqoHH

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 dkim-selector-lookup-constant-contact-5a5521ab
```

Example prompt: Can you check whether the Constant Contact DKIM selector is properly configured and not revoked for example.com — I want to know if emails sent through Constant Contact will actually pass DKIM verification?

## When to prefer this

Use this endpoint when you specifically need to verify Constant Contact DKIM configuration for a domain. It is more focused than a generic DKIM lookup because it targets the exact 'constantcontact' selector, parses all relevant fields, and explicitly flags revocation. Prefer it over manual DNS queries when you need structured output including key length and testing status without writing your own parser.

## Known failure modes

- Domain has no constantcontact._domainkey TXT record — returns not found
- Key is revoked (p= is empty) — returned as a parsed revocation status
- DNS resolution failure via Cloudflare DoH — network or timeout error
- Malformed TXT record that cannot be parsed — parse error returned
- Domain input missing or invalid — input validation error

## How this service works

DKIM public key for selector "constantcontact" of a domain: looks up constantcontact._domainkey.<domain> (TXT, Cloudflare DoH) and parses v=, k=, key type, public-key length, testing flag and whether the key is revoked (empty p=). Confirms that mail signed with the constantcontact selector will verify. $0.01 per lookup.

## Output

Returns parsed details from the constantcontact._domainkey.<domain> TXT record including: DKIM version (v=), key type (k=), public key length in bits, whether the domain is in testing mode, and whether the key is revoked (empty p= field). Indicates whether mail signed with this selector will successfully verify.

## 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/dkim-selector-lookup-constant-contact-5a5521ab/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)