Twilio SendGrid Mail API

Name: Twilio SendGrid Mail API API
Brand: Twilio SendGrid Mail API
Availability: InStock

✓ Official Vendor SpecCommunicationsEmail Deliverybearer3 EndpointsREST

For Agents

Send emails at scale via HTTP, manage batch sends, and track delivery with open and click analytics. Supports templates and scheduling.

Quickstart

Get started with Twilio SendGrid Mail API in minutes using your preferred integration method.

# Add to your MCP client config (Claude Desktop, Cursor, Windsurf)
{
  "jentic": {
    "url": "https://api.jentic.com/mcp",
    "auth": "oauth"
  }
}

# Then ask your agent:
"send a transactional email"

# → Jentic returns the GET /events tool with parameter schema, agent executes.

Capabilities

What an agent can do with Twilio SendGrid Mail API API.

Deliver transactional emails with dynamic template substitution and category tagging

Schedule email batches for future delivery with pause and cancel controls

Track recipient engagement through open and click event tracking

Route mail through global or EU-regional endpoints for data residency

GET STARTED

Start building with Twilio SendGrid Mail API API

Explore with Jentic

View OpenAPI Document

Use Cases

Patterns agents use Twilio SendGrid Mail API API for, with concrete tasks.

★ AI Agent Email Automation

AI agents send transactional emails through Jentic by searching for the send email operation, loading the request schema, and executing with recipient, subject, and content fields. Jentic handles bearer token injection and schema validation so the agent never touches raw API keys. A single API call to POST /v3/mail/send delivers the message with full template and tracking support.

Send a transactional email to user@example.com with subject 'Order Confirmation' using template ID d-abc123 and verify the 202 accepted response

Batch Email Scheduling

Schedule large volumes of marketing or transactional emails for future delivery by generating a batch ID and assigning it to individual sends. The API supports pausing or cancelling entire batches before their scheduled send time, giving operations teams control over time-sensitive campaigns without rebuilding send lists.

Create a new mail batch via POST /v3/mail/batch, then send 3 emails assigned to that batch ID with a send_at timestamp of tomorrow 9:00 AM UTC

Transactional Order Notifications

Trigger real-time email notifications for e-commerce events like order confirmations, shipping updates, and delivery receipts. Each send supports dynamic template data substitution, allowing personalized content per recipient without maintaining multiple templates. Open and click tracking provide visibility into engagement rates for critical communications.

Send an order confirmation email to a customer with dynamic data including order_id, item_list, and total_amount using a SendGrid dynamic template

Multi-Region Email Delivery

Route email sends through region-specific endpoints to comply with data residency requirements. The EU endpoint at api.eu.sendgrid.com processes mail within the European Union, while the global endpoint handles all other traffic. This requires no code changes beyond switching the base URL, making it straightforward for applications serving international users.

Send a GDPR-compliant email through the EU regional endpoint at https://api.eu.sendgrid.com/v3/mail/send with tracking disabled for a European subscriber

Key Endpoints

3 endpoints — send transactional and marketing emails at scale over http with support for templates, categories, open and click tracking, and batch scheduling.

METHOD

PATH

DESCRIPTION

POST

/v3/mail/send

Send an email with full template, tracking, and personalization support

POST

/v3/mail/batch

Generate a batch ID for grouping scheduled sends

GET

/v3/mail/batch/{batch_id}

Retrieve the status of a mail batch

POST

/v3/mail/send

Send an email with full template, tracking, and personalization support

POST

/v3/mail/batch

Generate a batch ID for grouping scheduled sends

GET

/v3/mail/batch/{batch_id}

Retrieve the status of a mail batch

Why though Jentic?

Three things that make agents converge on Jentic-routed access.

Credential isolation

SendGrid bearer tokens are stored encrypted in the Jentic vault (MAXsystem). Agents receive scoped access — the raw API key never enters the agent's context or logs.

Intent-based discovery

Agents search by intent (e.g., 'send a transactional email') and Jentic returns the matching SendGrid mail send operation with its full request schema, so the agent can construct the payload without reading documentation.

Time to first call

Direct SendGrid integration: 1-2 days for auth setup, template configuration, and error handling. Through Jentic: under 1 hour — search, load schema, execute.

Related APIs

Alternatives and complements available in the Jentic catalogue.

Alternative

Mailjet API

Mailjet offers similar transactional email delivery with built-in A/B testing and real-time monitoring

Choose Mailjet when you need built-in A/B testing on transactional sends or real-time delivery monitoring dashboards without additional integrations.

Alternative

Postmark Server API

Postmark focuses exclusively on transactional email with industry-leading delivery speed

Choose Postmark when delivery speed is the top priority and you only need transactional email — Postmark does not handle marketing sends.

Complementary

Twilio API

Twilio adds SMS, voice, and phone number management alongside SendGrid email

Use Twilio alongside SendGrid when the workflow requires multi-channel notifications spanning email, SMS, and voice calls.

Alternative

Brevo API

Brevo combines transactional email with SMS and CRM in a single platform

Choose Brevo when you need transactional email plus built-in CRM and SMS without managing multiple vendor integrations.

FAQs

Specific to using Twilio SendGrid Mail API API through Jentic.

What authentication does the SendGrid Mail API use?

The SendGrid Mail API uses Bearer token authentication. You include your API key in the Authorization header as 'Bearer SG.your-api-key'. Through Jentic, your SendGrid API key is stored encrypted in the MAXsystem vault and injected automatically into requests, so agents never handle raw credentials.

Can I schedule emails for future delivery with the SendGrid Mail API?

Yes. First create a batch ID via POST /v3/mail/batch, then include that batch_id and a send_at Unix timestamp in your mail send request. You can later retrieve the batch status via GET /v3/mail/batch/{batch_id} to verify scheduling or cancel the batch before delivery.

What are the rate limits for the SendGrid Mail API?

SendGrid enforces rate limits based on your plan tier. Free accounts allow 100 emails per day. Pro plans support higher throughput with burst limits on the /v3/mail/send endpoint. The API returns a 429 status code with a Retry-After header when limits are reached.

How do I send a templated email through Jentic?

Search for 'send a transactional email' in Jentic, load the SendGrid mail send operation schema, then execute with your template_id in the request body along with dynamic_template_data for personalization. Jentic injects the bearer token automatically. Install with pip install jentic and use the search-load-execute flow.

Does the SendGrid Mail API support attachments?

Yes. Include base64-encoded file content in the attachments array of the POST /v3/mail/send request body. Each attachment requires a filename, content (base64), and type (MIME type). The API supports multiple attachments per message with a total message size limit of 30MB.

Can I use separate endpoints for EU data residency?

Yes. SendGrid provides a dedicated EU endpoint at https://api.eu.sendgrid.com for subusers provisioned in the EU region. The API contract is identical to the global endpoint — only the base URL changes. This ensures email processing stays within EU boundaries for GDPR compliance.