# Otter Waiver MCP by usefulapi (remote · otter-waiver.usefulapi.io)

Read waivers, signed participants and check-ins in Otter Waiver.

- Trust score: 18/100 (low)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- remote · `otter-waiver.usefulapi.io`: 18/100 (this document), [markdown](https://verifymcp.io/servers/io-usefulapi-otter-waiver/otter-waiver.md), [page](https://verifymcp.io/servers/io-usefulapi-otter-waiver/otter-waiver)

## Channel facts

- Endpoint: `https://otter-waiver.usefulapi.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.5.3`

## 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 2026-11-05.

- **Endpoint Security**: 46/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not yet verified: we couldn't confirm whether this endpoint requires it.
  - HTTPS enforcement could not be verified: the plaintext port redirected somewhere other than https, so enforcement is unproven.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 0/100
  - Transport check failed: declared streamable-http, but the endpoint redirected instead of responding directly.
- **Schema Quality & AI Usability**: 0/100
  - Schema not yet verified: we couldn't read the endpoint's schema, or could read only part of its tool list.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **Tool Coverage**: 0/100
  - Tool coverage not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Tool Safety**: 0/100
  - Tool safety not yet verified: we couldn't read the endpoint's tools, or could read only part of the list.
- **Capabilities**: 0/100
  - Capabilities not yet verified: we couldn't read the endpoint's capabilities.

**Unverified: 5 categories.** Categories scored 0 because we could not verify them: authentication we do not have, an unreachable endpoint, or not enough scan history. We only credit what we can confirm.

## Install

### How do I install the Otter Waiver MCP by usefulapi server?

Otter Waiver MCP by usefulapi is a hosted endpoint at https://otter-waiver.usefulapi.io/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http io-usefulapi-otter-waiver 'https://otter-waiver.usefulapi.io/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "io-usefulapi-otter-waiver": {
      "url": "https://otter-waiver.usefulapi.io/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "io-usefulapi-otter-waiver": {
      "type": "http",
      "url": "https://otter-waiver.usefulapi.io/mcp"
    }
  }
}
```

### Codex

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

### opencode

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

### OpenClaw

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

### Hermes

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

### Netclaw

```json
{
  "McpServers": {
    "io-usefulapi-otter-waiver": {
      "Transport": "http",
      "Url": "https://otter-waiver.usefulapi.io/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add io-usefulapi-otter-waiver -t streamable-http -u 'https://otter-waiver.usefulapi.io/mcp'
```

### Other

```json
{
  "mcpServers": {
    "io-usefulapi-otter-waiver": {
      "type": "http",
      "url": "https://otter-waiver.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.

### 2026-11-01 (score 18, −47)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Tool safety: pass → unverified
- [security regression] Authorization: pass → unverified
- [functional regression] Schema quality: 100 → unverified
- [functional regression] Capabilities: pass → unverified
- [functional regression] Tool coverage: 100 → unverified

### 2026-10-31 (score 65)

First indexed and scored.

## MCP tools (5)

### `otterwaiver_list_waivers` (~140 tokens)

List waivers

List the waivers of the account (title, event, status draft/active/inactive, activities, response counts). Page numbers are required by the API; the defaults are page 1 with 20 records. Filter by event name (waiver folder title) or waiver title. API: GET /waivers.

Input parameters:

- `eventName` (string): Filter by event name (the waiver folder title).
- `pageIndex` (integer): Page number, starting at 1 (default 1).
- `pageSize` (integer): Records per page (default 20).
- `title` (string): Filter by waiver title.

### `otterwaiver_get_waiver` (~69 tokens)

Get waiver

Get one waiver with its full text, settings, additional fields and signed participants. Get the id from otterwaiver_list_waivers. API: GET /waivers/{id}.

Input parameters:

- `waiver_id` (string, required): The id (UUID) from the list tool.

### `otterwaiver_list_latest_participants` (~60 tokens)

List latest participants

List the 50 most recent participants who signed a waiver: signer contact data, emergency contact, answers to extra questions, timestamps and document links. The data is personal data of the signers. API: GET /participants/latest.

### `otterwaiver_list_latest_checkins` (~54 tokens)

List latest check-ins

List the 50 most recent participant check-ins, with the same fields as otterwaiver_list_latest_participants (the checkedIn timestamp is set). API: GET /participants/latest/checkins.

### `otterwaiver_get_participant` (~74 tokens)

Get participant

Get one participant (adult or minor) by id: signer data, waiver id, timestamps, document and certificate links. Get the id from the participant lists or from a waiver. API: GET /participants/{id}.

Input parameters:

- `participant_id` (string, required): The id (UUID) from the list tool.

## Diagnostics

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

## Score history

- 2026-11-05: 18
- 2026-11-04: 18
- 2026-11-03: 18
- 2026-11-02: 18
- 2026-11-01: 18
- 2026-10-31: 65

## Common questions

### What is the Otter Waiver MCP by usefulapi server?

Otter Waiver MCP by usefulapi is listed in the public MCP registry as io.usefulapi/otter-waiver. Read waivers, signed participants and check-ins in Otter Waiver. This page covers its hosted endpoint (https://otter-waiver.usefulapi.io/mcp).

### Is the Otter Waiver MCP by usefulapi server safe to use?

Otter Waiver MCP by usefulapi scores 18 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Otter Waiver MCP by usefulapi server expose?

Otter Waiver MCP by usefulapi exposes 5 tools: otterwaiver_list_waivers, otterwaiver_get_waiver, otterwaiver_list_latest_participants, otterwaiver_list_latest_checkins, otterwaiver_get_participant. Their descriptions and schemas cost roughly 397 tokens of context every time the server is loaded.

### Does the Otter Waiver MCP by usefulapi server require authentication?

Its publisher declares no required credentials for Otter Waiver MCP by usefulapi. We have not been able to confirm that against the live endpoint, and a server can require authorisation without declaring it here.

### Is the Otter Waiver MCP by usefulapi server still maintained?

Otter Waiver MCP by usefulapi is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What did VerifyMCP test on the Otter Waiver MCP by usefulapi server?

VerifyMCP ran 4 checks on Otter Waiver MCP by usefulapi, covering TLS certificate, HSTS header, DNSSEC and Transport. 7 items could not be completed, a gap on our side rather than a finding about Otter Waiver MCP by usefulapi: Authorization, HTTPS, Schema quality, Stability and 3 more. 5 categories score 0 for that reason, because we only credit what we can confirm. Supply Chain Security and Provenance & Transparency do not apply to a hosted endpoint, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.

## Links

- Remote endpoint: https://otter-waiver.usefulapi.io/mcp
- Repository: https://github.com/m190/usefulapi-mcp
- Website: https://usefulapi.io/otter-waiver/
- Changelog RSS feed: https://verifymcp.io/servers/io-usefulapi-otter-waiver/otter-waiver.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-usefulapi-otter-waiver/otter-waiver/changelog.json
- Trust report (JSON): https://verifymcp.io/servers/io-usefulapi-otter-waiver/otter-waiver.json
- HTML version of this page: https://verifymcp.io/servers/io-usefulapi-otter-waiver/otter-waiver