Inspect SendPost delivery statistics, sending IPs, message metadata, domains, and suppressions. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.
Turn on the SendPost connector, then ask in plain words. The AI picks the tools.
For SendPost customers reviewing email delivery and sending infrastructure.
Use an account key to read daily or aggregate delivery, bounce and engagement counts across sub-accounts over a date range.
Use an account key to inspect sending IP warmup states and IP pool routing or overflow settings without changing them.
Use a sub-account key to inspect domain DNS records, verification status and failure reasons without creating or verifying domains.
Use a sub-account key to review suppressed recipients and their reasons over a date range. This does not add or remove suppressions.
Use an account key to look up a submitted message’s sender, recipient, subject and routing metadata. Results exclude message bodies, attachments and custom headers.
The login page asks for your API key type and SendPost API key.
Find your API keys in your SendPost dashboard. Choose Account for sub-account statistics, message metadata, IPs and IP pools; choose Sub-account for domain and suppression audits. Paste the matching key, not SMTP credentials. Only tools for that key type can run. SendPost service access is purchased separately; existing customers can use their own keys. Connecting performs one small read to validate the key and does not send email or alter your account.
Team and Enterprise: an Owner adds the connector for the organization first.
No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.
Run this command, then run /mcp in Claude Code to log in:
Add to Cursor or add this to ~/.cursor/mcp.json:
{
"mcpServers": {
"sendpost": {
"url": "https://sendpost.usefulapi.io/mcp"
}
}
} Add to VS Code or add this to .vscode/mcp.json:
{
"servers": {
"sendpost": {
"type": "http",
"url": "https://sendpost.usefulapi.io/mcp"
}
}
} Run these commands. The second one opens the login page:
Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.
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 API key type and SendPost 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.
| Plan | Price | Limit |
|---|---|---|
| Free | $0 | 50 tool calls / month |
| Proper user | $9/mo · $90/yr | 10,000 tool calls / month |
| Pro+per user | $39/mo · $390/yr | 100,000 tool calls / month |
Each paid plan covers this SendPost server only. Ask your AI to run sendpost_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with sendpost_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with sendpost_upgrade before then undoes the cancel. Or write to [email protected].
sendpost_list_subaccountssendpost_get_subaccountsendpost_list_ipssendpost_get_ipsendpost_list_ip_poolssendpost_get_ip_poolsendpost_list_account_statssendpost_get_account_statssendpost_get_account_group_statssendpost_list_subaccount_statssendpost_get_subaccount_statssendpost_get_message_metadatasendpost_list_domainssendpost_get_domainsendpost_list_suppressionssendpost_usage_statussendpost_request_featuresendpost_upgradesendpost_cancel_subscriptionCompare delivery statistics. Inspect sending IPs and pools. Audit sending-domain configuration. Review suppressed recipients. Inspect message metadata. See what you can do for the details.
No. usefulapi is an independent service. It is not affiliated with or endorsed by SendPost. The server calls the SendPost API with your own SendPost access, so it sees only the data that your account can see.
Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.
The login page asks for your API key type and SendPost API key. See Before you connect for where to find them.
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 API key type and SendPost 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 SendPost 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 SendPost.
All 15 SendPost tools are marked read-only.
The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this SendPost server only. Cancel any time: your paid plan then runs to the end of the paid period. Run sendpost_usage_status to see how many calls you used.
Ask the AI to run sendpost_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run sendpost_cancel_subscription. Your paid plan continues to the end of the paid period.
Tell the AI what you wanted to do. It can send the request with sendpost_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, ChatGPT, Codex, 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.
Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.