SpacePost

Connect it to your AI

Claude Code

claude mcp add --transport http spacepost https://api.spacepost.dev/mcp

Claude, ChatGPT, Cursor and other apps

Add it as a custom connector with this URL (Streamable HTTP):

https://api.spacepost.dev/mcp

This server expects extra headers, usually an API key from its maker.

claude mcp add spacepost -e SPACEPOST_API_KEY=… -- npx -y @spacepost/mcp@0.2.1

Cursor, VS Code and other apps (mcp.json)

{
  "mcpServers": {
    "spacepost": {
      "url": "https://api.spacepost.dev/mcp"
    }
  }
}

Tools it offers

46 tools, as the server itself reported during our check on Oct 31, 2026.

• list_emailsList emails. Returns sent and scheduled emails, newest first, without bodies. Requires a `full_access` API key. API: `GET /emails` (operationId `listEmails`, Emails).
• send_emailSend an email. Validates and queues one email. Each recipient counts towards your quota. Use `scheduled_at` to send later (up to 30 days ahead). Pass `tenant_id` to send on behalf of a tenant (not needed when the `from`
• send_batch_emailsSend batch emails. Sends up to 100 emails in one call. All-or-nothing, if any email is invalid none are sent. Attachments, `scheduled_at` and a per-email `tenant_id` are supported; the paused-tenant and tenant-cap errors
• get_emailRetrieve an email. Requires a `full_access` API key. API: `GET /emails/{id}` (operationId `getEmail`, Emails).
• update_emailReschedule an email. Changes `scheduled_at` of an email that is still `scheduled`. Requires a `full_access` API key. API: `PATCH /emails/{id}` (operationId `updateEmail`, Emails).
• cancel_emailCancel a scheduled email. Requires a `full_access` API key. API: `POST /emails/{id}/cancel` (operationId `cancelEmail`, Emails).
• list_domainsList domains. Requires a `full_access` API key. API: `GET /domains` (operationId `listDomains`, Domains).
• create_domainCreate a domain. Registers a domain and returns the DNS records to add (three DKIM CNAMEs, plus MX and SPF on the MAIL FROM subdomain). Domain names are globally unique. The number of domains is limited by your plan (Fre
• get_domainRetrieve a domain. Requires a `full_access` API key. API: `GET /domains/{id}` (operationId `getDomain`, Domains).
• update_domainUpdate a domain. Toggles open and click tracking. Requires a `full_access` API key. API: `PATCH /domains/{id}` (operationId `updateDomain`, Domains).
• delete_domainDelete a domain. Requires a `full_access` API key. API: `DELETE /domains/{id}` (operationId `deleteDomain`, Domains).
• verify_domainVerify a domain. Re-checks DNS now. Retrieve the domain afterwards to read the new `status` and per-record statuses. Requires a `full_access` API key. API: `POST /domains/{id}/verify` (operationId `verifyDomain`, Domains
• list_api_keysList API keys. Requires a `full_access` API key. API: `GET /api-keys` (operationId `listApiKeys`, API Keys).
• create_api_keyCreate an API key. The `token` is returned only in this response. Requires a `full_access` API key. API: `POST /api-keys` (operationId `createApiKey`, API Keys).
• delete_api_keyDelete an API key. The key stops working immediately. The response body is an empty object. Requires a `full_access` API key. API: `DELETE /api-keys/{id}` (operationId `deleteApiKey`, API Keys).
• list_webhooksList webhooks. Requires a `full_access` API key. API: `GET /webhooks` (operationId `listWebhooks`, Webhooks).
• create_webhookCreate a webhook. In production the endpoint must use https and resolve to a public address. Requires a `full_access` API key. API: `POST /webhooks` (operationId `createWebhook`, Webhooks).
• get_webhookRetrieve a webhook. Requires a `full_access` API key. API: `GET /webhooks/{id}` (operationId `getWebhook`, Webhooks).
• update_webhookUpdate a webhook. Requires a `full_access` API key. API: `PATCH /webhooks/{id}` (operationId `updateWebhook`, Webhooks).
• delete_webhookDelete a webhook. Requires a `full_access` API key. API: `DELETE /webhooks/{id}` (operationId `deleteWebhook`, Webhooks).
• list_audiencesList audiences. Requires a `full_access` API key. API: `GET /audiences` (operationId `listAudiences`, Audiences).
• create_audienceCreate an audience. Requires a `full_access` API key. API: `POST /audiences` (operationId `createAudience`, Audiences).
• get_audienceRetrieve an audience. Requires a `full_access` API key. API: `GET /audiences/{id}` (operationId `getAudience`, Audiences).
• delete_audienceDelete an audience. Also deletes its contacts. Requires a `full_access` API key. API: `DELETE /audiences/{id}` (operationId `deleteAudience`, Audiences).
• list_contactsList contacts. Requires a `full_access` API key. API: `GET /audiences/{audienceId}/contacts` (operationId `listContacts`, Contacts).
• create_contactCreate a contact. Emails are lower-cased. An address can only appear once per audience. Requires a `full_access` API key. API: `POST /audiences/{audienceId}/contacts` (operationId `createContact`, Contacts).
• get_contactRetrieve a contact. Requires a `full_access` API key. API: `GET /audiences/{audienceId}/contacts/{idOrEmail}` (operationId `getContact`, Contacts).
• update_contactUpdate a contact. Requires a `full_access` API key. API: `PATCH /audiences/{audienceId}/contacts/{idOrEmail}` (operationId `updateContact`, Contacts).
• delete_contactDelete a contact. Requires a `full_access` API key. API: `DELETE /audiences/{audienceId}/contacts/{idOrEmail}` (operationId `deleteContact`, Contacts).
• list_broadcastsList broadcasts. Requires a `full_access` API key. API: `GET /broadcasts` (operationId `listBroadcasts`, Broadcasts).
• create_broadcastCreate a broadcast. Creates a draft. The `from` address must belong to a verified domain of your team and `audience_id` to one of your audiences. Requires a `full_access` API key. API: `POST /broadcasts` (operationId `cr
• get_broadcastRetrieve a broadcast. Requires a `full_access` API key. API: `GET /broadcasts/{id}` (operationId `getBroadcast`, Broadcasts).
• update_broadcastUpdate a broadcast. Only drafts can be updated. Request body: Any field of the create request; only drafts can be updated. Requires a `full_access` API key. API: `PATCH /broadcasts/{id}` (operationId `updateBroadcast`, B
• delete_broadcastDelete a broadcast. Only drafts and broadcasts that are scheduled for the future can be deleted. Requires a `full_access` API key. API: `DELETE /broadcasts/{id}` (operationId `deleteBroadcast`, Broadcasts).
• get_broadcast_readinessCheck a broadcast before sending. SpacePost extension (not part of Resend). Returns a deliverability checklist: sender domain and DMARC, subject, Gmail clipping (HTML over 102 KB), image-heavy bodies, link shorteners, sp
• send_broadcastSend or schedule a broadcast. Queues a draft for delivery to every subscribed contact of its audience. The broadcast needs `html` or `text`. Without `scheduled_at` it starts immediately; the status becomes `queued`, then
• list_suppressionsList suppressions. Requires a `full_access` API key. API: `GET /suppressions` (operationId `listSuppressions`, Suppressions).
• create_suppressionAdd a suppression. Adds the address with reason `manual`. Adding an address that is already suppressed returns the existing entry. Requires a `full_access` API key. API: `POST /suppressions` (operationId `createSuppressi
• delete_suppressionRemove a suppression. Requires a `full_access` API key. API: `DELETE /suppressions/{idOrEmail}` (operationId `deleteSuppression`, Suppressions).
• list_tenantsList tenants. Requires a `full_access` API key. API: `GET /tenants` (operationId `listTenants`, Tenants).

Questions