# DKIM Selector protonmail2 Lookup

> DKIM Selector protonmail2 Lookup 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 'protonmail2' selector of a given domain via Cloudflare DoH, returning key type, length, testing flag, and revocation status.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/dkim/protonmail2?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-protonmail2-lookup-bbee56de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_q_vdFNxbIFUNwWg9_D48x

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-protonmail2-lookup-bbee56de
```

Example prompt: Can you check whether the protonmail2 DKIM selector is properly set up for acmecorp.com — I want to know the key type, key length, and whether it's revoked or in testing mode?

## When to prefer this

Use this endpoint when you specifically need to verify the 'protonmail2' DKIM selector for a domain, particularly for domains using ProtonMail as their mail provider. Prefer this over generic DNS TXT lookups when you need structured, parsed DKIM fields (key type, length, revocation) rather than raw DNS data. Choose the sibling 'dkim-selector-default' endpoint if checking the 'default' selector instead.

## Known failure modes

- Domain has no protonmail2._domainkey TXT record — returns not-found or empty result
- DNS lookup failure via Cloudflare DoH — network or resolver error
- Malformed TXT record that cannot be parsed — partial or error response
- Domain does not exist — NXDOMAIN response
- Revoked key (empty p= field) — returns revoked status flag

## How this service works

DKIM public key for selector "protonmail2" of a domain: looks up protonmail2._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 protonmail2 selector will verify. $0.01 per lookup.

## Output

Returns parsed details from the protonmail2._domainkey.<domain> TXT record including the DKIM version (v=), key type (k=), public key length in bits, whether the key is in testing mode, and whether the key has been revoked (empty p= field), plus a confirmation of whether mail signed with the protonmail2 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-protonmail2-lookup-bbee56de/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)