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

Send email and read templates, marketing contacts, lists, stats, bounces and unsubscribes.

- Trust score: 73/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `sendgrid.usefulapi.io`: 73/100 (this document), [markdown](https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid.md), [page](https://verifymcp.io/servers/io-usefulapi-sendgrid/sendgrid)

## Channel facts

- Endpoint: `https://sendgrid.usefulapi.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## 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 1173 tokens (~106/item across 11 items; 11 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 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-sendgrid https://sendgrid.usefulapi.io/mcp
```

### Codex

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

### opencode

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

### OpenClaw

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

### Hermes

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

### Other

```json
{
  "mcpServers": {
    "io-usefulapi-sendgrid": {
      "type": "http",
      "url": "https://sendgrid.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 73, +45)

- [security improvement] Authorization: unverified → pass
- [functional regression] MCP protocol: unverified → fail
- [functional improvement] Endpoint reachability: not serving MCP → reachable
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] Stability: unverified → 0.23

### 2026-08-02 (score 28, +10)

- [security improvement] Transport: fail → pass

### 2026-08-01 (score 18, −54)

- [security regression] Endpoint reachability: reachable → not serving MCP
- [security regression] Stability: 0.13 → unverified
- [security regression] Authorization: pass → unverified
- [security regression] Transport: pass → fail
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] Capabilities: fail → unverified

### 2026-07-31 (score 72, +1)

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

### 2026-07-29 (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.

### 2026-07-28 (score 70, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-07-27 (score 69, +57)

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

### 2026-07-26 (score 12)

First indexed and scored.

## MCP tools (11)

### `sendgrid_ping` (~38 tokens)

Ping (health check)

Health check — verifies the API key works and returns the scopes (permissions) granted to it. SendGrid: GET /v3/scopes.

### `sendgrid_list_templates` (~106 tokens)

List email templates

List your transactional email templates (Dynamic and/or Legacy). Returns { result: [...], _metadata } — use _metadata.next / page_token to paginate. SendGrid: GET /v3/templates.

Input parameters:

- `generations` (string): Which template generation(s) to return (default: dynamic).
- `page_size` (integer): Number of templates per page (1–200, default 50).
- `page_token` (string): Pagination token from a previous response's _metadata.

### `sendgrid_get_template` (~59 tokens)

Get email template

Get a single transactional email template by id, including its versions (subject + content). SendGrid: GET /v3/templates/{template_id}.

Input parameters:

- `template_id` (string, required): The template id (dynamic template ids start with "d-").

### `sendgrid_list_marketing_lists` (~91 tokens)

List marketing lists

List your Marketing Campaigns contact lists, each with its id, name, and contact_count. Returns { result: [...], _metadata }. SendGrid: GET /v3/marketing/lists.

Input parameters:

- `page_size` (integer): Number of lists per page (1–1000, default 100).
- `page_token` (string): Pagination token from a previous response's _metadata.

### `sendgrid_get_contact_count` (~46 tokens)

Get contact count

Get the total number of Marketing Campaigns contacts on your account. Returns { contact_count, billable_count }. SendGrid: GET /v3/marketing/contacts/count.

### `sendgrid_search_contacts_by_email` (~78 tokens)

Search contacts by email

Look up marketing contacts by exact email address (a read-only lookup — mutates nothing). Returns { result: { "<email>": { contact: {...} } } }. SendGrid: POST /v3/marketing/contacts/search/emails.

Input parameters:

- `emails` (array, required): One or more exact email addresses to look up.

### `sendgrid_get_stats` (~137 tokens)

Get email stats

Get global email statistics over a date range (delivered, opens, clicks, bounces, spam reports, etc.). Returns an array of { date, stats: [{ metrics: {...} }] }. SendGrid: GET /v3/stats.

Input parameters:

- `aggregated_by` (string): How to group the returned statistics.
- `end_date` (string): End date in YYYY-MM-DD format (defaults to today).
- `limit` (integer): Number of results to return.
- `offset` (integer): Number of results to skip (for pagination).
- `start_date` (string, required): Start date in YYYY-MM-DD format (required).

### `sendgrid_list_bounces` (~134 tokens)

List bounces

List bounced email addresses (the bounce suppression list). Returns an array of { created, email, reason, status }. SendGrid: GET /v3/suppression/bounces.

Input parameters:

- `email` (string): Filter to a specific bounced email address.
- `end_time` (integer): End of the time range, as a Unix timestamp (seconds).
- `limit` (integer): Number of bounces to return (1–500).
- `offset` (integer): Number of bounces to skip (for pagination).
- `start_time` (integer): Start of the time range, as a Unix timestamp (seconds).

### `sendgrid_list_global_unsubscribes` (~118 tokens)

List global unsubscribes

List globally-unsubscribed email addresses (the global suppression list). Returns an array of { created, email }. SendGrid: GET /v3/suppression/unsubscribes.

Input parameters:

- `end_time` (integer): End of the time range, as a Unix timestamp (seconds).
- `limit` (integer): Number of records to return.
- `offset` (integer): Number of records to skip (for pagination).
- `start_time` (integer): Start of the time range, as a Unix timestamp (seconds).

### `sendgrid_send_mail` (~265 tokens)

Send email

SENDS A REAL EMAIL immediately via SendGrid. Provide `from_email` and one or more `to` recipients, plus EITHER a subject + content OR a `template_id` (dynamic template ids start with "d-", pass values via dynamic_template_data). Returns { status: "accepted", message_id }. SendGrid: POST /v3/mail/send.

Input parameters:

- `bcc` (array): BCC recipient email addresses.
- `cc` (array): CC recipient email addresses.
- `content` (string): The email body. Required unless template_id is provided.
- `content_type` (string): MIME type of the body content (default text/html).
- `dynamic_template_data` (object): Key/value data merged into a dynamic template's handlebars variables.
- `from_email` (string, required): Sender email address (must be a verified sender/domain).
- `from_name` (string): Sender display name.
- `reply_to` (string): Reply-To email address.
- `subject` (string): Email subject line. Required unless a template_id supplies it.
- `template_id` (string): A template id to render (dynamic template ids start with "d-"). When set, `content` is omitted.
- `to` (array, required): One or more recipient email addresses.

### `sendgrid_add_or_update_contacts` (~101 tokens)

Add or update marketing contacts

UPSERTS marketing contacts (creates new ones, updates existing ones by email) and optionally adds them to lists. This is an ASYNC job — returns { job_id } you can poll. SendGrid: PUT /v3/marketing/contacts.

Input parameters:

- `contacts` (array, required): Contacts to add or update (each needs an `email`; custom fields pass through).
- `list_ids` (array): List ids to add these contacts to.

## Diagnostics

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

## Score history

- 2026-08-03: 73
- 2026-08-02: 28
- 2026-08-01: 18
- 2026-07-31: 72
- 2026-07-30: 71
- 2026-07-29: 71
- 2026-07-28: 70
- 2026-07-27: 69
- 2026-07-26: 12

## Links

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