# io.usefulapi/loops (remote · loops.usefulapi.io)

Manage Loops contacts, mailing lists, and transactional/event emails.

- Trust score: 74/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `loops.usefulapi.io`: 74/100 (this document), [markdown](https://verifymcp.io/servers/io-usefulapi-loops/loops.md), [page](https://verifymcp.io/servers/io-usefulapi-loops/loops)

## Channel facts

- Endpoint: `https://loops.usefulapi.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 78/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation is enforced on tool calls, advertised via RFC 9728 protected-resource metadata. Discovery is public, which costs nothing: no tool can be invoked without a token.
  - HTTPS not yet verified: we couldn't determine whether a plaintext access path exists.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
  - The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 77/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 926 tokens (~92/item across 10 items; 10 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http io-usefulapi-loops https://loops.usefulapi.io/mcp
```

### Codex

```toml
[mcp_servers.io-usefulapi-loops]
url = "https://loops.usefulapi.io/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-usefulapi-loops": {
      "type": "remote",
      "url": "https://loops.usefulapi.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-usefulapi-loops --url https://loops.usefulapi.io/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-usefulapi-loops:
    url: "https://loops.usefulapi.io/mcp"
```

### Other

```json
{
  "mcpServers": {
    "io-usefulapi-loops": {
      "type": "http",
      "url": "https://loops.usefulapi.io/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 74, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 73, +13)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Stability: 0.20 → unverified
- [security improvement] Authorization: unverified → pass
- [security] Authorization: Authorisation not fully verified: no authorisation is required to connect, but we couldn't read the tool list to see what that exposes.
- [functional regression] Capabilities: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional improvement] Endpoint reachability: not serving MCP → reachable
- [functional] First check of Schema quality: unverified

### 2026-08-01 (score 60, −12)

- [security regression] Authorization: pass → unverified

### 2026-07-31 (score 72, +3)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 69, −2)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-28 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 70, +9)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 61)

First indexed and scored.

## MCP tools (10)

### `loops_test_api_key` (~39 tokens)

Test API key

Verify the configured Loops API key and return the team name — a good first call. Loops API: GET /v1/api-key.

### `loops_find_contact` (~69 tokens)

Find a contact

Find a contact by email or userId (supply at least one). Loops API: GET /v1/contacts/find.

Input parameters:

- `email` (string): Contact email address to look up.
- `userId` (string): Contact userId to look up (your app's user id).

### `loops_list_contact_properties` (~53 tokens)

List contact properties

List contact fields / custom properties defined in Loops. Loops API: GET /v1/contacts/properties.

Input parameters:

- `list` (string): Which properties to return: all (default) or custom only.

### `loops_list_mailing_lists` (~36 tokens)

List mailing lists

List all mailing lists in the Loops account (id + name). Loops API: GET /v1/lists.

### `loops_create_contact` (~160 tokens)

Create a contact

Creates a contact in Loops (additive). Loops API: POST /v1/contacts/create.

Input parameters:

- `email` (string, required): Contact email address (required).
- `firstName` (string): First name.
- `lastName` (string): Last name.
- `mailingLists` (object): Map of mailing-list id -> subscribed boolean.
- `properties` (object): Arbitrary custom contact properties (string/number/boolean); merged into the request body.
- `source` (string): Source label for where the contact came from.
- `subscribed` (boolean): Whether the contact is subscribed to email.
- `userGroup` (string): User group segment name.
- `userId` (string): Your app's user id for this contact.

### `loops_update_contact` (~170 tokens)

Update a contact

Updates (or creates) a contact by email/userId. Upserts — creates the contact if not found. Loops API: PUT /v1/contacts/update.

Input parameters:

- `email` (string, required): Contact email address (required; identifies the contact).
- `firstName` (string): First name.
- `lastName` (string): Last name.
- `mailingLists` (object): Map of mailing-list id -> subscribed boolean.
- `properties` (object): Arbitrary custom contact properties (string/number/boolean); merged into the request body.
- `source` (string): Source label.
- `subscribed` (boolean): Whether the contact is subscribed to email.
- `userGroup` (string): User group segment name.
- `userId` (string): Your app's user id (alternative identifier).

### `loops_delete_contact` (~65 tokens)

Delete a contact

Deletes a contact from Loops. Destructive. Supply email OR userId. Loops API: POST /v1/contacts/delete.

Input parameters:

- `email` (string): Email of the contact to delete.
- `userId` (string): userId of the contact to delete.

### `loops_create_contact_property` (~66 tokens)

Create a contact property

Creates a custom contact property/field (additive schema change). Loops API: POST /v1/contacts/properties.

Input parameters:

- `name` (string, required): Name of the custom property to create (required).
- `type` (string, required): Data type of the property (required).

### `loops_send_event` (~137 tokens)

Send an event

Sends an event to Loops for a contact — TRIGGERS any automations/loops subscribed to this event. Loops API: POST /v1/events/send.

Input parameters:

- `contactProperties` (object): Contact properties to update alongside the event.
- `email` (string): Contact email (supply email or userId).
- `eventName` (string, required): The event name to send (required).
- `eventProperties` (object): Properties attached to this event.
- `mailingLists` (object): Map of mailing-list id -> subscribed boolean.
- `userId` (string): Contact userId (supply email or userId).

### `loops_send_transactional` (~131 tokens)

Send a transactional email

SENDS a real transactional email via a Loops template. This dispatches an actual email to the recipient. Loops API: POST /v1/transactional.

Input parameters:

- `addToAudience` (boolean): Whether to add the recipient to your audience.
- `attachments` (array): Optional attachments: array of { filename, contentType, data } objects.
- `dataVariables` (object): Template data variables (string/number) to interpolate into the template.
- `email` (string, required): Recipient email address (required).
- `transactionalId` (string, required): The Loops transactional template id (required).

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-usefulapi-loops/loops#diagnostics

## Score history

- 2026-08-03: 74
- 2026-08-02: 73
- 2026-08-01: 60
- 2026-07-31: 72
- 2026-07-30: 69
- 2026-07-29: 71
- 2026-07-28: 71
- 2026-07-27: 70
- 2026-07-26: 61

## Links

- Remote endpoint: https://loops.usefulapi.io/mcp
- Repository: https://github.com/m190/usefulapi-mcp
- Changelog RSS feed: https://verifymcp.io/servers/io-usefulapi-loops/loops/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-usefulapi-loops/loops/changelog.json
- HTML version of this page: https://verifymcp.io/servers/io-usefulapi-loops/loops