# SPF Authorizes Postmark Bulk Checker

> SPF Authorizes Postmark Bulk Checker is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-22).

Checks whether SPF records for up to 20 domains authorize Postmark as a sending service, processing all domains concurrently in a single batch call.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/bulk/email/spf-authorizes/postmark?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spf-authorizes-postmark-bulk-checker-bce4b829
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Fg49E-kOQ1VxfYq0xz-pn

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 spf-authorizes-postmark-bulk-checker-bce4b829
```

Example prompt: Check whether Postmark is authorized to send email for all of these domains via SPF: acme.com, betacorp.io, gammaworks.net, deltatech.co, and 10 more from my list — I need results for all of them at once with any errors flagged per domain.

## When to prefer this

Use this endpoint when you have a list of 2–20 domains and need to check SPF authorization for Postmark on all of them efficiently in a single call, rather than making individual requests per domain. Prefer it over the single-domain endpoint to reduce latency and cost overhead when batch processing domain lists.

## Known failure modes

- Exceeding the 20-domain batch limit may result in an error or truncation
- Domains with missing or malformed SPF records may return per-item errors
- DNS lookup failures for individual domains are captured in the per-item error field rather than failing the whole batch
- Payment failure (x402) if USDC balance is insufficient for the $0.10 batch charge

## How this service works

Bulk spf authorizes postmark: up to 20 domains in one call, processed concurrently, results in input order with a per-item error field and a failure count. Same answer per item as the single endpoint. Batch enrichment for agents that hold a list. $0.10 per batch.

## Output

An ordered array of results matching the input domain list, where each item contains the SPF authorization status for Postmark (same answer as the single-domain endpoint), a per-item error field if the check failed, and an overall failure count for the batch.

## 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/spf-authorizes-postmark-bulk-checker-bce4b829/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from email.intel.rallylive.ca](https://www.zero.xyz/host/email.intel.rallylive.ca/llms.txt)