# SPF Authorizes SendGrid Bulk Check

> SPF Authorizes SendGrid Bulk Check is a paid API for AI agents from email.intel.rallylive.ca, paid per call via x402, $0.1/call, status unknown (last checked 2026-10-24).

Checks up to 20 domains in a single concurrent batch to determine whether each domain's SPF record authorizes SendGrid to send email on its behalf.

## Facts

- Endpoint: GET https://email.intel.rallylive.ca/bulk/email/spf-authorizes/sendgrid?utm_source=zero.xyz
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/spf-authorizes-sendgrid-bulk-check-91310bbc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FCcW2qy9waXgeYahkl6h_

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-sendgrid-bulk-check-91310bbc
```

Example prompt: Check whether SendGrid is authorized to send email for these 15 domains in our list: acme.com, widgetco.io, example.org — run them all at once and tell me which ones have SendGrid in their SPF record and which ones don't.

## When to prefer this

Use this endpoint when you need to check more than one domain for SendGrid SPF authorization in a single API call. It processes up to 20 domains concurrently and returns results in input order, making it far more efficient than calling the single-domain endpoint repeatedly. Prefer this over the single endpoint whenever you hold a list of domains to validate, especially in bulk enrichment pipelines or onboarding workflows.

## Known failure modes

- Domain does not exist or has no SPF TXT record — per-item error returned
- DNS lookup timeout for one or more domains — affected items flagged with error
- More than 20 domains submitted — batch limit exceeded
- Malformed domain input — validation error on that item
- Payment not included or insufficient — 402 response blocking the call

## How this service works

Bulk spf authorizes sendgrid: 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

Returns an ordered array of results matching the input domain list, each containing a boolean indicating whether the domain's SPF record authorizes SendGrid, a per-item error field if the lookup 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-sendgrid-bulk-check-91310bbc/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)