Automate SendGrid email delivery workflows including marketing campaigns (Single Sends), contact and list management, sender identity setup, and email analytics through Composio's SendGrid toolkit.
Toolkit docs
:
composio.dev/toolkits/sendgrid
Prerequisites
Rube MCP must be connected (RUBE_SEARCH_TOOLS available)
Active SendGrid connection via
RUBE_MANAGE_CONNECTIONS
with toolkit
sendgrid
Always call
RUBE_SEARCH_TOOLS
first to get current tool schemas
Setup
Get Rube MCP
Add
https://rube.app/mcp
as an MCP server in your client configuration. No API keys needed — just add the endpoint and it works.
Verify Rube MCP is available by confirming
RUBE_SEARCH_TOOLS
responds
Call
RUBE_MANAGE_CONNECTIONS
with toolkit
sendgrid
If connection is not ACTIVE, follow the returned auth link to complete SendGrid API key authentication
Confirm connection status shows ACTIVE before running any workflows
Core Workflows
1. Create and Send Marketing Campaigns (Single Sends)
When to use
User wants to create and send a marketing email campaign to a contact list or segment.
Tool sequence
:
SENDGRID_RETRIEVE_ALL_LISTS
- List available marketing lists to target [Prerequisite]
SENDGRID_CREATE_A_LIST
- Create a new list if needed [Optional]
SENDGRID_ADD_OR_UPDATE_A_CONTACT
- Add contacts to the list [Optional]
SENDGRID_GET_ALL_SENDER_IDENTITIES
- Get verified sender ID [Prerequisite]
SENDGRID_CREATE_SINGLE_SEND
- Create the campaign with content, sender, and recipients [Required]
Key parameters for SENDGRID_CREATE_SINGLE_SEND
:
name
Campaign name (required)
email__config__subject
Email subject line
email__config__html__content
HTML body content
email__config__plain__content
Plain text version
email__config__sender__id
Verified sender identity ID
email__config__design__id
Use instead of html_content for pre-built designs
send__to__list__ids
Array of list UUIDs to send to
send__to__segment__ids
Array of segment UUIDs
send__to__all
true to send to all contacts
email__config__suppression__group__id
or
email__config__custom__unsubscribe__url
One required for compliance
Pitfalls
:
Setting
send_at
on CREATE does NOT schedule the send; it only prepopulates the UI date; use the Schedule endpoint separately
send_at: "now"
is only valid with the Schedule endpoint, not CREATE
Must provide either
suppression_group_id
or
custom_unsubscribe_url
for unsubscribe compliance
Sender must be verified before use; check with
SENDGRID_GET_ALL_SENDER_IDENTITIES
Nested params use double-underscore notation (e.g.,
email__config__subject
)
2. Manage Contacts and Lists
When to use
User wants to create contact lists, add/update contacts, search for contacts, or remove contacts from lists.
Tool sequence
:
SENDGRID_RETRIEVE_ALL_LISTS
- List all marketing lists [Required]
SENDGRID_CREATE_A_LIST
- Create a new contact list [Optional]
SENDGRID_GET_A_LIST_BY_ID
- Get list details and sample contacts [Optional]
SENDGRID_ADD_OR_UPDATE_A_CONTACT
- Upsert contacts with list association [Required]
SENDGRID_GET_CONTACTS_BY_EMAILS
- Look up contacts by email [Optional]
SENDGRID_GET_CONTACTS_BY_IDENTIFIERS
- Look up contacts by email, phone, or external ID [Optional]
SENDGRID_GET_LIST_CONTACT_COUNT
- Verify contact count after operations [Optional]
SENDGRID_REMOVE_CONTACTS_FROM_A_LIST
- Remove contacts from a list without deleting [Optional]
SENDGRID_REMOVE_LIST_AND_OPTIONAL_CONTACTS
- Delete an entire list [Optional]
SENDGRID_IMPORT_CONTACTS
- Bulk import from CSV [Optional]
Key parameters for SENDGRID_ADD_OR_UPDATE_A_CONTACT
:
contacts
Array of contact objects (max 30,000 or 6MB), each with at least one identifier:
email
,
phone_number_id
,
external_id
, or
anonymous_id
(required)
list_ids
Array of list UUID strings to associate contacts with
Pitfalls
:
SENDGRID_ADD_OR_UPDATE_A_CONTACT
is asynchronous; returns 202 with
job_id
; contacts may take 10-30 seconds to appear
List IDs are UUIDs (e.g., "ca7a3796-e8a8-4029-9ccb-df8937940562"), not integers
List names must be unique; duplicate names cause 400 errors
SENDGRID_ADD_A_SINGLE_RECIPIENT_TO_A_LIST
uses the legacy API; prefer
SENDGRID_ADD_OR_UPDATE_A_CONTACT
with
list_ids
SENDGRID_REMOVE_LIST_AND_OPTIONAL_CONTACTS
is irreversible; require explicit user confirmation
Email addresses are automatically lowercased by SendGrid
3. Manage Sender Identities
When to use
User wants to set up or view sender identities (From addresses) for sending emails.
Tool sequence
:
SENDGRID_GET_ALL_SENDER_IDENTITIES
- List all existing sender identities [Required]
SENDGRID_CREATE_A_SENDER_IDENTITY
- Create a new sender identity [Optional]
SENDGRID_VIEW_A_SENDER_IDENTITY
- View details for a specific sender [Optional]
SENDGRID_UPDATE_A_SENDER_IDENTITY
- Update sender details [Optional]
SENDGRID_CREATE_VERIFIED_SENDER_REQUEST
- Create and verify a new sender [Optional]
SENDGRID_AUTHENTICATE_A_DOMAIN
- Set up domain authentication for auto-verification [Optional]
Key parameters for SENDGRID_CREATE_A_SENDER_IDENTITY
:
from__email
From email address (required)
from__name
Display name (required)
reply__to__email
Reply-to address (required)
nickname
Internal identifier (required)
address
,
city
,
country
Physical address for CAN-SPAM compliance (required)
Pitfalls
:
New senders must be verified before use; if domain is not authenticated, a verification email is sent
Up to 100 unique sender identities per account
Avoid using domains with strict DMARC policies (gmail.com, yahoo.com) as from addresses
SENDGRID_CREATE_VERIFIED_SENDER_REQUEST
sends a verification email; sender is unusable until verified
4. View Email Statistics and Activity
When to use
User wants to review email delivery stats, bounce rates, open/click metrics, or message activity.
Tool sequence
:
SENDGRID_RETRIEVE_GLOBAL_EMAIL_STATISTICS
- Get account-wide delivery metrics [Required]
SENDGRID_GET_ALL_CATEGORIES
- Discover available categories for filtering [Optional]
SENDGRID_RETRIEVE_EMAIL_STATISTICS_FOR_CATEGORIES
- Get stats broken down by category [Optional]
SENDGRID_FILTER_ALL_MESSAGES
- Search email activity feed by recipient, status, or date [Optional]
SENDGRID_FILTER_MESSAGES_BY_MESSAGE_ID
- Get detailed events for a specific message [Optional]
SENDGRID_REQUEST_CSV
- Export activity data as CSV for large datasets [Optional]
SENDGRID_DOWNLOAD_CSV
- Download the exported CSV file [Optional]
Key parameters for SENDGRID_RETRIEVE_GLOBAL_EMAIL_STATISTICS
:
start_date
Start date YYYY-MM-DD (required)
end_date
End date YYYY-MM-DD
aggregated_by
"day", "week", or "month"
limit
/
offset
Pagination (default 500)
Key parameters for SENDGRID_FILTER_ALL_MESSAGES
:
query
SQL-like query string, e.g.,
status="delivered"
,
to_email="user@example.com"
, date ranges with
BETWEEN TIMESTAMP
limit
1-1000 (default 10)
Pitfalls
:
SENDGRID_FILTER_ALL_MESSAGES
requires the "30 Days Additional Email Activity History" paid add-on; returns 403 without it
Global statistics are nested under
details[].stats[0].metrics
, not a flat structure
Category statistics are only available for the previous 13 months
Maximum 10 categories per request in
SENDGRID_RETRIEVE_EMAIL_STATISTICS_FOR_CATEGORIES
CSV export is limited to one request per 12 hours; link expires after 3 days
5. Manage Suppressions
When to use
User wants to check or manage unsubscribe groups for email compliance.
- Check suppression status for a specific email [Optional]
Pitfalls
:
Suppressed addresses remain undeliverable even if present on marketing lists
Campaign send counts may be lower than list counts due to suppressions
Common Patterns
ID Resolution
Always resolve names to IDs before operations:
List name -> list_id
:
SENDGRID_RETRIEVE_ALL_LISTS
and match by name
Sender name -> sender_id
:
SENDGRID_GET_ALL_SENDER_IDENTITIES
and match
Contact email -> contact_id
:
SENDGRID_GET_CONTACTS_BY_EMAILS
with email array
Template name -> template_id
Use the SendGrid UI or template endpoints
Pagination
SENDGRID_RETRIEVE_ALL_LISTS
Token-based with
page_token
and
page_size
(max 1000)
SENDGRID_RETRIEVE_GLOBAL_EMAIL_STATISTICS
Offset-based with
limit
(max 500) and
offset
Always paginate list retrieval to avoid missing existing lists
Async Operations
Contact operations (
ADD_OR_UPDATE_A_CONTACT
,
IMPORT_CONTACTS
) are asynchronous:
Returns 202 with a
job_id
Wait 10-30 seconds before verifying with
GET_CONTACTS_BY_EMAILS
Use
GET_LIST_CONTACT_COUNT
to confirm list growth
Known Pitfalls
ID Formats
Marketing list IDs are UUIDs (e.g., "ca7a3796-e8a8-4029-9ccb-df8937940562")
Legacy list IDs are integers; do not mix with Marketing API endpoints
Sender identity IDs are integers
Template IDs: Dynamic templates start with "d-", legacy templates are UUIDs
Contact IDs are UUIDs
Rate Limits
SendGrid may return HTTP 429; respect
Retry-After
headers
CSV export limited to one request per 12 hours
Bulk contact upsert max: 30,000 contacts or 6MB per request
Parameter Quirks
Nested params use double-underscore:
email__config__subject
,
from__email
send_at
on CREATE_SINGLE_SEND only sets a UI default, does NOT schedule
SENDGRID_ADD_A_SINGLE_RECIPIENT_TO_A_LIST
uses legacy API;
recipient_id
is Base64-encoded lowercase email
SENDGRID_RETRIEVE_ALL_LISTS
and
SENDGRID_GET_ALL_LISTS
both exist; prefer RETRIEVE_ALL_LISTS for Marketing API
Contact adds are async (202); always verify after a delay
Legacy vs Marketing API
Some tools use the legacy Contact Database API (
/v3/contactdb/
) which may return 403 on newer accounts
Prefer Marketing API tools:
SENDGRID_ADD_OR_UPDATE_A_CONTACT
,
SENDGRID_RETRIEVE_ALL_LISTS
,
SENDGRID_CREATE_SINGLE_SEND
Quick Reference
Task
Tool Slug
Key Params
List marketing lists
SENDGRID_RETRIEVE_ALL_LISTS
page_size
,
page_token
Create list
SENDGRID_CREATE_A_LIST
name
Get list by ID
SENDGRID_GET_A_LIST_BY_ID
id
Get list count
SENDGRID_GET_LIST_CONTACT_COUNT
id
Add/update contacts
SENDGRID_ADD_OR_UPDATE_A_CONTACT
contacts
,
list_ids
Search contacts by email
SENDGRID_GET_CONTACTS_BY_EMAILS
emails
Search by identifiers
SENDGRID_GET_CONTACTS_BY_IDENTIFIERS
identifier_type
,
identifiers
Remove from list
SENDGRID_REMOVE_CONTACTS_FROM_A_LIST
id
,
contact_ids
Delete list
SENDGRID_REMOVE_LIST_AND_OPTIONAL_CONTACTS
id
,
delete_contacts
Import contacts CSV
SENDGRID_IMPORT_CONTACTS
field mappings
Create Single Send
SENDGRID_CREATE_SINGLE_SEND
name
,
email__config__*
,
send__to__list__ids
List sender identities
SENDGRID_GET_ALL_SENDER_IDENTITIES
(none)
Create sender
SENDGRID_CREATE_A_SENDER_IDENTITY
from__email
,
from__name
,
address
Verify sender
SENDGRID_CREATE_VERIFIED_SENDER_REQUEST
from_email
,
nickname
,
address
Authenticate domain
SENDGRID_AUTHENTICATE_A_DOMAIN
domain
Global email stats
SENDGRID_RETRIEVE_GLOBAL_EMAIL_STATISTICS
start_date
,
aggregated_by
Category stats
SENDGRID_RETRIEVE_EMAIL_STATISTICS_FOR_CATEGORIES
start_date
,
categories
Filter email activity
SENDGRID_FILTER_ALL_MESSAGES
query
,
limit
Message details
SENDGRID_FILTER_MESSAGES_BY_MESSAGE_ID
msg_id
Export CSV
SENDGRID_REQUEST_CSV
query
Download CSV
SENDGRID_DOWNLOAD_CSV
download_uuid
List categories
SENDGRID_GET_ALL_CATEGORIES
(none)
Suppression groups
SENDGRID_GET_SUPPRESSION_GROUPS
(none)
Get template
SENDGRID_RETRIEVE_A_SINGLE_TRANSACTIONAL_TEMPLATE
template_id
Duplicate template
SENDGRID_DUPLICATE_A_TRANSACTIONAL_TEMPLATE
template_id
,
name
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