Retainful MCP by usefulapi

by FastDrop

MCP MCP VERIFIED Verified 2 hours ago Registry import free

List contacts and lists; create contacts, add them to lists and record events in Retainful.

List contacts and lists; create contacts, add them to lists and record events in Retainful. Official MCP Registry: io.usefulapi/retainful@1.0.0. Remote endpoint: https://retainful.usefulapi.io/mcp

Problem it solves

Discoverable MCP server listed in the official MCP Registry.

How it's different

Remote MCP endpoint ingested from the official registry and probed by FastDrop.

Ingested from the official MCP Registry

FastDrop pulled this entry from the official MCP Registry as io.usefulapi/retainful and probed the endpoint. The maker did not submit it, so the outbound link is not endorsed and the description is not theirs.

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Tools this endpoint exposes

Read directly from the endpoint on 2 Nov 2026. Not supplied by the maker.

retainful_list_contacts
List contacts (profiles) in the Retainful organization, one page at a time, with consent status and source. Retainful API: GET /customer.
retainful_get_contact
Get one contact (profile) by its Retainful id (contactUUID), with its attributes. Retainful API: GET /customer/{id}.
retainful_list_lists
List the lists and segments in the organization with their ids. Use the id as list_id in retainful_add_contact_to_list. Retainful API: GET /contact-groups.
retainful_get_list
Get one list or segment by its id. Retainful API: GET /contact-groups/{id}.
retainful_upsert_contact
WRITE: create a contact, or update it when the email or phone already exists. Does not add anyone to a list. email_opt_in is required: it sets marketing consent, so send SUBSCRIBED only with real cons
retainful_add_contact_to_list
WRITE: create or update a contact by email and add them to a list in one call. A list can start an automation. email_opt_in is required: an existing contact is set to SUBSCRIBED when it is omitted her
retainful_track_event
WRITE: record one event on a contact's timeline. Automations triggered by the event can email the contact. Reuse the same unique_identifier only for a retry of the same real occurrence (a repeat does