# DKIM Selector 'pic' Public Key Lookup

> DKIM Selector 'pic' Public Key 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 'pic' selector of a given domain via Cloudflare DoH DNS-over-HTTPS, returning key metadata and validity status.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/dkim/pic?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-pic-public-key-lookup-7c70e3de
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_plIxxbRxLRQPMw9cX9e0H

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-pic-public-key-lookup-7c70e3de
```

Example prompt: Can you look up the DKIM public key for the 'pic' selector on example.com and tell me if the key is valid, what type it is, how long it is, and whether it's been revoked?

## When to prefer this

Use this endpoint when you specifically need to inspect the DKIM configuration for the 'pic' selector (commonly used by certain ESPs or mail platforms). Prefer this over generic DNS lookup tools when you need structured, pre-parsed output including key length, type, revocation status, and testing flag without writing your own TXT record parser. Choose the selector-specific sibling endpoints (postmark, sg, ml, sel1, etc.) when dealing with those respective selectors instead.

## Known failure modes

- Domain does not have a pic._domainkey TXT record — returns not-found or empty result
- DNS lookup failure via Cloudflare DoH — network or upstream resolver error
- Malformed TXT record that cannot be parsed — partial or error response
- Key is revoked (p= is empty) — returned as a valid lookup but marked revoked
- Domain name not provided or invalid — request error

## How this service works

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

## Output

Returns parsed details from the pic._domainkey.<domain> DNS TXT record including: DKIM version (v=), key type (k=, e.g. RSA or Ed25519), public key length in bits, whether the key is revoked (empty p= field), whether the testing flag (t=y) is set, and an overall confirmation of whether emails signed with the pic 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-pic-public-key-lookup-7c70e3de/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)