Email — entry 017 of 19
Sendgrid
SendGrid's REST API sends transactional and marketing email, manages templates and suppression lists, and reports delivery statistics, all authenticated with a Bearer API key over a Twilio-operated cloud SMTP backend. A free tier covers a small daily send volume before its metered paid plans.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSEnabledCallable directly from browser JavaScript.
PricingFreemiumA usable free tier exists, with paid plans for more volume.
FormatsJSONResponses can be requested as JSON.
GreatAPIs Score
Score81
Authentication15/25API key required
Pricing17/20Freemium tier available
Docs20/20Machine-readable spec file bundled
Formats9/15Single response format
Freshness20/20Verified within 6 months
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<a href="https://greatapis.com/api/sendgrid/"><img src="https://greatapis.com/badge/sendgrid.svg" alt="Scored 81 on greatapis.com"></a>Auth quickstart
- Get a key at the provider
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Endpoints
API Keys2
GET/api_keysRetrieve all API Keys belonging to the authenticated user
Parameters
| Name | In | Required | Type |
|---|---|---|---|
limit | query | no | integer |
Responses
| Status | Description | Schema |
|---|---|---|
200 | — | |
401 | — | — |
403 | — | — |
404 | — | — |
500 | — | — |
POST/api_keysCreate API keys
Request body
application/json
Responses
| Status | Description | Schema |
|---|---|---|
201 | — | |
400 | — | — |
401 | — | — |
403 | — | — |
404 | — | — |
500 | — | — |
Bounces API1
GET/suppression/bouncesRetrieve all bounces
Parameters
| Name | In | Required | Type |
|---|---|---|---|
start_time | query | no | integer |
end_time | query | no | integer |
Accept | header | yes | string |
Responses
| Status | Description | Schema |
|---|---|---|
200 | — | |
401 | global_error_response_schema |
Contacts1
GET/marketing/contactsGet Sample Contacts
Responses
| Status | Description | Schema |
|---|---|---|
200 | — | |
400 | — | |
401 | — | — |
403 | — | — |
404 | — | |
500 | — | — |
Lists2
GET/marketing/listsGet All Lists
Parameters
| Name | In | Required | Type |
|---|---|---|---|
page_size | query | no | number |
page_token | query | no | string |
Responses
| Status | Description | Schema |
|---|---|---|
200 | — |
POST/marketing/listsCreate List
Request body
application/json
Responses
| Status | Description | Schema |
|---|---|---|
200 | list | |
400 | — |
Mail Send1
POST/mail/sendv3 Mail Send
Request body
application/json
Responses
| Status | Description | Schema |
|---|---|---|
202 | — | |
400 | — | — |
401 | — | — |
403 | — | — |
404 | — | — |
413 | — | — |
500 | — | — |
Sender Identities API2
GET/sendersGet all Sender Identities
Responses
| Status | Description | Schema |
|---|---|---|
200 | — |
POST/sendersCreate a Sender Identity
Request body
application/json
Responses
| Status | Description | Schema |
|---|---|---|
201 | senderID | |
400 | — |
Stats1
GET/statsRetrieve global email statistics
Responses
| Status | Description | Schema |
|---|---|---|
200 | — |
Transactional Templates2
GET/templatesRetrieve paged transactional templates.
Parameters
| Name | In | Required | Type |
|---|---|---|---|
generations | query | no | string |
page_size | query | yes | number |
page_token | query | no | string |
Responses
| Status | Description | Schema |
|---|---|---|
200 | — | |
400 | — |
POST/templatesCreate a transactional template.
Request body
application/json
Responses
| Status | Description | Schema |
|---|---|---|
201 | transactional_template |