# HubSpot Marketing Transactional Single Send API

> HubSpot Marketing Transactional Single Send API on Apizie: 6 endpoints (Send a single send transactional email asynchronously., Query SMTP API tokens by campaign name or an emailCampaignId., Create a SMTP API token., Query a single token by ID., …) 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/business:hubspot-marketing-transactional-single-send/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.

- Project key: `business:hubspot-marketing-transactional-single-send`
- Category: Business
- Status: byok
- Source: https://developers.hubspot.com/docs/api/overview
- Page: https://apizie.tech/api/business/hubspot-marketing-transactional-single-send
- OpenAPI: https://apizie.tech/api/business/hubspot-marketing-transactional-single-send/openapi.json

Basepom for all HubSpot Projects

## Endpoints

### Send a single send transactional email asynchronously.
`POST https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/post-marketing-transactional-2026-09-single-email-send-send` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| body | object | yes | JSON request body |

### Query SMTP API tokens by campaign name or an emailCampaignId.
`GET https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/get-marketing-transactional-2026-09-smtp-tokens-get-tokens-p` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| after | string | no | The paging cursor token of the last successfully read resource will be returned as the `paging.next.after` JSON property of a paged… |
| campaignName | string | no | Filter the results by the name of the campaign. This is a string parameter. |
| emailCampaignId | string | no | Filter the results by the unique identifier of the email campaign. This is a string parameter. |
| limit | integer | no | The maximum number of results to display per page. |

### Create a SMTP API token.
`POST https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/post-marketing-transactional-2026-09-smtp-tokens-create-toke` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| body | object | yes | JSON request body |

### Query a single token by ID.
`GET https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/get-marketing-transactional-2026-09-smtp-tokens-token-id-get` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| tokenId | string | yes | The unique identifier of the SMTP API token to retrieve. |

### Delete a single token by ID.
`POST https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/delete-marketing-transactional-2026-09-smtp-tokens-token-id` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| tokenId | string | yes | The unique identifier of the SMTP token to delete. |

### Reset the password of an existing token.
`POST https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/post-marketing-transactional-2026-09-smtp-tokens-token-id-pa` (byok)

| Parameter | Type | Required | Description |
|---|---|---|---|
| tokenId | string | yes | The unique identifier of the SMTP token for which the password is being reset. |

## Example
```
curl "https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/post-marketing-transactional-2026-09-single-email-send-send" \
  -H "x-api-key: $APIZIE_KEY" \
  -H "x-upstream-key: $PROVIDER_KEY"
```

## FAQ

### How do I call the HubSpot Marketing Transactional Single Send API?
Create a free Apizie key, then send POST https://apizie.tech/v1/business:hubspot-marketing-transactional-single-send/post-marketing-transactional-2026-09-single-email-send-send with the header x-api-key. Every endpoint returns { project, data, timestamp }.

### Is the HubSpot Marketing Transactional Single Send API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card. HubSpot Marketing Transactional Single Send itself also needs your own key from hubapi.com.

### Can AI agents use the HubSpot Marketing Transactional Single Send 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 business:hubspot-marketing-transactional-single-send.

### What is the status of the HubSpot Marketing Transactional Single Send API?
Needs your own provider key (bring your own key)