Retainful MCP by usefulapi

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Other

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

https://retainful.usefulapi.io/mcp

claude mcp add --transport http retainful https://retainful.usefulapi.io/mcp

{
  "mcpServers": {
    "retainful": {
      "url": "https://retainful.usefulapi.io/mcp"
    }
  }
}

{
  "servers": {
    "retainful": {
      "type": "http",
      "url": "https://retainful.usefulapi.io/mcp"
    }
  }
}

https://retainful.usefulapi.io/mcp

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

• 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 consent. Needs email or phone. Retainful API: POST /customer/create.

• 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 here. Retainful API: POST /contact-groups/{listId}/contacts.

• 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 not trigger automations again); use a new one for each new occurrence. Event dat

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

• ✓ Pass

  Maker matches the repo

  The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 48 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 7 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

• More stars than 0% of the other 32461 servers in this category
• Published to the registry more recently than 97% of the other 32461 servers in this category
• Basic checks equal to or better than 100% of the other 32461 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

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