# Twilio SendGrid Reverse DNS API API

> Twilio SendGrid Reverse DNS API API on Apizie: 5 endpoints (Retrieve all reverse DNS records, Set up reverse DNS, Retrieve a reverse DNS record, Delete a reverse DNS record, …) returned as clean JSON through one API key. Send your own provider key in the x-upstream-key header. Call it over REST at https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.

- Project key: `communication:sendgrid-reverse-dns-v3`
- Category: Communication
- Status: byok
- Source: https://www.twilio.com/docs/sendgrid/api-reference
- Page: https://apizie.tech/api/communication/sendgrid-reverse-dns-v3
- OpenAPI: https://apizie.tech/api/communication/sendgrid-reverse-dns-v3/openapi.json

The Twilio SendGrid Reverse DNS API (formerly IP Whitelabel) allows you to configure reverse DNS settings for your account. Mailbox providers verify the sender of your emails by performing a reverse DNS lookup. When…

## Endpoints

### Retrieve all reverse DNS records
`GET https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/list-reverse-dns` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| limit | integer | no | `limit` sets the page size, i.e. maximum number of items from the list to be returned for a single API request. If omitted, the default… |
| offset | integer | no | The number of items in the list to skip over before starting to retrieve the items for the requested page. The default `offset` of `0`… |
| ip | string | no | The IP address segment that you'd like to use in a prefix search. |
| on-behalf-of | string | no | The `on-behalf-of` header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You… |

### Set up reverse DNS
`POST https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/set-up-reverse-dns` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| on-behalf-of | string | no | The `on-behalf-of` header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You… |
| body | object | no | JSON request body |

### Retrieve a reverse DNS record
`GET https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/get-reverse-dns` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| id | string | yes | The ID of the reverse DNS record that you would like to retrieve. |
| on-behalf-of | string | no | The `on-behalf-of` header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You… |

### Delete a reverse DNS record
`POST https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/delete-reverse-dns` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| id | string | yes | The ID of the reverse DNS record that you would like to retrieve. |
| on-behalf-of | string | no | The `on-behalf-of` header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You… |

### Validate a reverse DNS record
`POST https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/validate-reverse-dns` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| id | string | yes | The ID of the reverse DNS record that you would like to validate. |
| on-behalf-of | string | no | The `on-behalf-of` header allows you to make API calls from a parent account on behalf of the parent's Subusers or customer accounts. You… |

## Example
```
curl "https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/list-reverse-dns" \
  -H "x-api-key: $APIZIE_KEY" \
  -H "x-upstream-key: $PROVIDER_KEY"
```

## FAQ

### How do I call the Twilio SendGrid Reverse DNS API API?
Create a free Apizie key, then send GET https://apizie.tech/v1/communication:sendgrid-reverse-dns-v3/list-reverse-dns with the header x-api-key. Every endpoint returns { project, data, timestamp }.

### Is the Twilio SendGrid Reverse DNS API API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card. Twilio SendGrid Reverse DNS API itself also needs your own key from sendgrid.com.

### Can AI agents use the Twilio SendGrid Reverse DNS API API?
Yes. Add the Apizie MCP server (https://apizie.tech/mcp) to Claude, ChatGPT, Cursor or VS Code, then ask in plain language. The agent calls run_scraper with project key communication:sendgrid-reverse-dns-v3.

### What is the status of the Twilio SendGrid Reverse DNS API API?
Needs your own provider key (bring your own key)