Send email and read templates, marketing contacts, lists, stats, bounces and unsubscribes. Hosted by usefulapi — connect from Claude, Cursor, or any MCP client.
Team and Enterprise: an Owner adds the connector for the organization first.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"sendgrid": {
"url": "https://sendgrid.usefulapi.io/mcp"
}
}
}Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"sendgrid": {
"type": "http",
"url": "https://sendgrid.usefulapi.io/mcp"
}
}
}Other MCP clients (Windsurf, Cline, Zed and more): add the URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser. Do not add an Authorization header: see Before you connect.
The login page asks for your SendGrid API key.
Find it in SendGrid → Settings → API Keys (create a key with Full Access, or at least read access). Your key is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.
Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your SendGrid API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
Turn on the SendGrid connector, then ask in plain words. The AI picks the tools.
| Tool | Type | What it does |
|---|---|---|
sendgrid_ping | read | 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 | read | 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. |
sendgrid_get_template | read | Get email template Get a single transactional email template by id, including its versions (subject + content). SendGrid: GET /v3/templates/{template_id}. |
sendgrid_list_marketing_lists | read | 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. |
sendgrid_get_contact_count | read | 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 | read | 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. |
sendgrid_get_stats | read | 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. |
sendgrid_list_bounces | read | List bounces List bounced email addresses (the bounce suppression list). Returns an array of { created, email, reason, status }. SendGrid: GET /v3/suppression/bounces. |
sendgrid_list_global_unsubscribes | read | List global unsubscribes List globally-unsubscribed email addresses (the global suppression list). Returns an array of { created, email }. SendGrid: GET /v3/suppression/unsubscribes. |
sendgrid_send_mail | write | 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. |
sendgrid_add_or_update_contacts | write | 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. |
sendgrid_usage_status | Usage status (free-tier meter) Report the caller's current free-tier usage this month: calls used, monthly limit, remaining, and whether the cap is reached. Read-only; does not count against the meter. | |
sendgrid_request_feature | Request a missing feature Tell usefulapi that the user needs something the SendGrid tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter. | |
sendgrid_upgrade | Upgrade to Pro (unlimited) Subscribe to the Pro plan for UNLIMITED SendGrid tool calls (the free tier caps monthly usage). Choose monthly ($9/month) or yearly ($90/year — 2 months free) billing. Returns a Stripe Checkout link to open in your browser; after payment your account upgrades automatically. Does not count against the meter. | |
sendgrid_cancel_subscription | Cancel the Pro subscription Cancel the caller's SendGrid Pro subscription at the end of the paid period (no refund for the current period; unlimited calls continue until then, then the free tier applies). Requires confirm: true. Run sendgrid_upgrade later to undo the cancel before the period ends. Does not count against the meter. |
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 100 tool calls / month |
| Proper user | $9/mo · $90/yr | Unlimited |
Pro covers this SendGrid server only. Subscribe with sendgrid_upgrade (it returns a Stripe Checkout link). Cancel any time with sendgrid_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running sendgrid_upgrade before then undoes the cancel. Or write to [email protected].
No. usefulapi is an independent service. It is not affiliated with or endorsed by SendGrid. The server calls the SendGrid API with your own SendGrid access, so it sees only the data that your account can see.
The login page asks for your SendGrid API key. See Before you connect for where to find it.
No. Add only the URL. Do not add an Authorization header or an API key to the client config. The server signs you in with OAuth: the login page asks for your SendGrid API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.
The login stores them encrypted in the authorization grant of your connection. The server uses them to call the SendGrid API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in SendGrid.
Yes, if you approve it. 2 of the 11 SendGrid tools can create or change data. The other 9 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.
The Free plan gives 100 tool calls / month. Pro costs $9/mo or $90/yr, with unlimited tool calls, for this SendGrid server only. Run sendgrid_usage_status to see how many calls you used.
Ask the AI to run sendgrid_upgrade: it returns a Stripe Checkout link. To cancel, run sendgrid_cancel_subscription. Pro continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with sendgrid_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.
Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, Cursor, VS Code, Windsurf and others.
This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.