io.usefulapi/sendgrid
REMOTE · SENDGRID.USEFULAPI.IO · SCANNED AUG 3
Send email and read templates, marketing contacts, lists, stats, bounces and unsubscribes.
Available components
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. How we score →
Endpoint Security78
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- 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. View diagnostics → Pass
- HTTPS not yet verified: we couldn't determine whether a plaintext access path exists. View diagnostics → Unverified
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
- The authorisation server offers only Dynamic Client Registration (RFC 7591), which MCP 2026-07-28 deprecated in favour of Client ID Metadata Documents. View diagnostics → Partial
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability77
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 1173 tokens (~106/item across 11 items; 11 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management23
- Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Capabilities60
- Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28. See how to fix → Fail
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · sendgrid.usefulapi.io
claude mcp add --transport http io-usefulapi-sendgrid https://sendgrid.usefulapi.io/mcp
[mcp_servers.io-usefulapi-sendgrid] url = "https://sendgrid.usefulapi.io/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"io-usefulapi-sendgrid": {
"type": "remote",
"url": "https://sendgrid.usefulapi.io/mcp",
"enabled": true
}
}
} openclaw mcp add io-usefulapi-sendgrid --url https://sendgrid.usefulapi.io/mcp --transport streamable-http
mcp_servers:
io-usefulapi-sendgrid:
url: "https://sendgrid.usefulapi.io/mcp" {
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 3 Aug 26 +45
- Authorization: unverified → pass ▲ security
- MCP protocol: unverified → fail ▼ functional
- Endpoint reachability: not serving MCP → reachable ▲ functional
- Tool coverage: unverified → 100 ▲ functional
- Stability: unverified → 0.23 ▲ functional
- 2 Aug 26 +10
- Transport: fail → pass ▲ security
- 1 Aug 26 −54
- Endpoint reachability: reachable → not serving MCP ▼ security
- Stability: 0.13 → unverified ▼ security
- Authorization: pass → unverified ▼ security
- Transport: pass → fail ▼ security
- Tool coverage: 100 → unverified ▼ functional
- Capabilities: fail → unverified ▼ functional
- 31 Jul 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Jul 26 +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.
- 28 Jul 26 +1
- Stability: unverified → 0.03 ▲ functional
- 27 Jul 26 +57
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 12
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 3 Aug 2026 · Probed https://sendgrid.usefulapi.io/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=usefulapi.io | CN=WE1,O=Google Trust Services,C=US | 19 Jul 2026 | 17 Oct 2026 | ECDSA 256 | ECDSA-SHA256 | c48d9ad5b0ad246113fec15091bdfc12 |
| SANs: usefulapi.io, sendgrid.usefulapi.io, *.sendgrid.usefulapi.io | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
DNSSEC insecure
Validation of sendgrid.usefulapi.io. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| io. | present | 57355 | 8 | Verified |
| usefulapi.io. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication Enforced and verified
The endpoint asked for a token and published valid RFC 9728 metadata describing how to get one.
| Result | Enforced and verified |
|---|---|
| Enforced | On tool calls |
| HTTP status | 200 |
WWW-Authenticate challenge Bearer realm="OAuth", resource_metadata="https://sendgrid.usefulapi.io/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"
Bearer realm="OAuth", resource_metadata="https://sendgrid.usefulapi.io/.well-known/oauth-protected-resource/mcp", error="invalid_token", error_description="Missing or invalid access token"Protected resource metadata
| Document | https://sendgrid.usefulapi.io/.well-known/oauth-protected-resource/mcp |
|---|---|
| Retrieved | Yes |
| Resource | https://sendgrid.usefulapi.io/mcp |
| Authorisation server | https://sendgrid.usefulapi.io |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://sendgrid.usefulapi.io/mcp | Verified | 200 | |
| http (plaintext) | http://sendgrid.usefulapi.io/mcp | Inconclusive | 401 |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.
sendgrid_add_or_update_contacts Add or update marketing contacts ~101
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.
| Name | Type | Req | Description |
|---|---|---|---|
| contacts | array | yes | Contacts to add or update (each needs an `email`; custom fields pass through). |
| list_ids | array | — | List ids to add these contacts to. |
No output schema declared.
No examples provided.
sendgrid_get_contact_count Get contact count ~46
Get the total number of Marketing Campaigns contacts on your account. Returns { contact_count, billable_count }. SendGrid: GET /v3/marketing/contacts/count.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sendgrid_get_stats Get email stats ~137
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | Start date in YYYY-MM-DD format (required). |
No output schema declared.
No examples provided.
sendgrid_get_template Get email template ~59
Get a single transactional email template by id, including its versions (subject + content). SendGrid: GET /v3/templates/{template_id}.
| Name | Type | Req | Description |
|---|---|---|---|
| template_id | string | yes | The template id (dynamic template ids start with "d-"). |
No output schema declared.
No examples provided.
sendgrid_list_bounces List bounces ~134
List bounced email addresses (the bounce suppression list). Returns an array of { created, email, reason, status }. SendGrid: GET /v3/suppression/bounces.
| Name | Type | Req | Description |
|---|---|---|---|
| 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). |
No output schema declared.
No examples provided.
sendgrid_list_global_unsubscribes List global unsubscribes ~118
List globally-unsubscribed email addresses (the global suppression list). Returns an array of { created, email }. SendGrid: GET /v3/suppression/unsubscribes.
| Name | Type | Req | Description |
|---|---|---|---|
| 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). |
No output schema declared.
No examples provided.
sendgrid_list_marketing_lists List marketing lists ~91
List your Marketing Campaigns contact lists, each with its id, name, and contact_count. Returns { result: [...], _metadata }. SendGrid: GET /v3/marketing/lists.
| Name | Type | Req | Description |
|---|---|---|---|
| page_size | integer | — | Number of lists per page (1–1000, default 100). |
| page_token | string | — | Pagination token from a previous response's _metadata. |
No output schema declared.
No examples provided.
sendgrid_list_templates List email templates ~106
List your transactional email templates (Dynamic and/or Legacy). Returns { result: [...], _metadata } — use _metadata.next / page_token to paginate. SendGrid: GET /v3/templates.
| Name | Type | Req | Description |
|---|---|---|---|
| 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. |
No output schema declared.
No examples provided.
sendgrid_ping Ping (health check) ~38
Health check — verifies the API key works and returns the scopes (permissions) granted to it. SendGrid: GET /v3/scopes.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
sendgrid_search_contacts_by_email Search contacts by email ~78
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.
| Name | Type | Req | Description |
|---|---|---|---|
| emails | array | yes | One or more exact email addresses to look up. |
No output schema declared.
No examples provided.
sendgrid_send_mail Send email ~265
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.
| Name | Type | Req | Description |
|---|---|---|---|
| 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 | yes | 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 | yes | One or more recipient email addresses. |
No output schema declared.
No examples provided.