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SpacePost

dev.spacepost/mcpspacepost.devstreamable-httpv0.2.2-1Scanned

Send email and manage domains, contacts and webhooks on SpacePost, the Resend-compatible email API.

46 tools: 10 can delete or cancel things, 5 do something that can't be undone, 14 change things and 17 only read.

Tools: 10 delete, 5 irreversible, 14 write, 17 read.
  • Reads private data · 4
  • Reads text others write · 5
  • Can send data out · 8
  • No findings

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29 of these tools change something. Run those as governed actions.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

46 tools

Deletes or cancels 10Claude Code: deny
  • cancel_emailCancel a scheduled email.No findings

    Why it is in this group

    • The name "cancel_email" says "cancel": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Cancel a scheduled email. Requires a `full_access` API key. API: `POST /emails/{id}/cancel` (operationId `cancelEmail`, Emails).

    Annotations the server declares

    • title: Cancel a scheduled email
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_api_keyDelete an API key.No findings

    Why it is in this group

    • The name "delete_api_key" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete 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).

    Annotations the server declares

    • title: Delete an API key
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_audienceDelete an audience.No findings

    Why it is in this group

    • The name "delete_audience" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete an audience. Also deletes its contacts. Requires a `full_access` API key. API: `DELETE /audiences/{id}` (operationId `deleteAudience`, Audiences).

    Annotations the server declares

    • title: Delete an audience
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_broadcastDelete a broadcast.No findings

    Why it is in this group

    • The name "delete_broadcast" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete 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).

    Annotations the server declares

    • title: Delete a broadcast
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_contactDelete a contact.No findings

    Why it is in this group

    • The name "delete_contact" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete a contact. Requires a `full_access` API key. API: `DELETE /audiences/{audienceId}/contacts/{idOrEmail}` (operationId `deleteContact`, Contacts).

    Annotations the server declares

    • title: Delete a contact
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_domainDelete a domain.No findings

    Why it is in this group

    • The name "delete_domain" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete a domain. Requires a `full_access` API key. API: `DELETE /domains/{id}` (operationId `deleteDomain`, Domains).

    Annotations the server declares

    • title: Delete a domain
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_suppressionRemove a suppression.No findings

    Why it is in this group

    • The name "delete_suppression" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Remove a suppression. Requires a `full_access` API key. API: `DELETE /suppressions/{idOrEmail}` (operationId `deleteSuppression`, Suppressions).

    Annotations the server declares

    • title: Remove a suppression
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_tenantDelete a tenant.No findings

    Why it is in this group

    • The name "delete_tenant" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete a tenant. Fails with `422` while the tenant still has domains; delete those first. Requires a `full_access` API key. API: `DELETE /tenants/{ref}` (operationId `deleteTenant`, Tenants).

    Annotations the server declares

    • title: Delete a tenant
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • delete_webhookDelete a webhook.No findings

    Why it is in this group

    • The name "delete_webhook" says "delete": a word for removing or ending something.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Delete a webhook. Requires a `full_access` API key. API: `DELETE /webhooks/{id}` (operationId `deleteWebhook`, Webhooks).

    Annotations the server declares

    • title: Delete a webhook
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
  • pause_tenantPause a tenant.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it destructive (destructiveHint: true).
    Description, as the server wrote it
    Pause a tenant. Stops all sending for the tenant. Sends return `403 sending_paused`; emails already queued fail. The body is optional. Requires a `full_access` API key. API: `POST /tenants/{ref}/pause` (operationId `pauseTenant`, Tenants).

    Annotations the server declares

    • title: Pause a tenant
    • readOnlyHint: false
    • destructiveHint: true
    • idempotentHint: true
    • openWorldHint: false
Can't be undone 5Claude Code: ask
  • create_broadcastCreate a broadcast.Can send data outNo findings

    Why it is in this group

    • The name "create_broadcast" says "create": a word for a change.
    • The name "create_broadcast" also says "broadcast": a word for sending, and what is sent cannot be taken back.

    What it can reach

    • outboundThe name "create_broadcast" says "broadcast": it sends or publishes something to other people.
    Description, as the server wrote it
    Create 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 `createBroadcast`, Broadcasts).

    Annotations the server declares

    • title: Create a broadcast
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • send_batch_emailsSend batch emails.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "send_batch_emails" says "send": a word for sending, and what is sent cannot be taken back.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • outboundThe name "send_batch_emails" says "send": it sends or publishes something to other people.
    Description, as the server wrote it
    Send 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 apply to the whole batch. Put the emails in `body` as an array. Prefer send_email for a single message. Works with a `sending_access` or `full_access` API key. API: `POST /emails/batch` (operationId `sendBatchEmails`, Emails).

    Annotations the server declares

    • title: Send batch emails
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • send_broadcastSend or schedule a broadcast.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "send_broadcast" says "send": a word for sending, and what is sent cannot be taken back.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • outboundThe name "send_broadcast" says "send": it sends or publishes something to other people.
    Description, as the server wrote it
    Send 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 `sending` and `sent`. Sends to every subscribed contact in the audience. Run get_broadcast_readiness first and confirm with the user. Requires a `full_access` API key. API: `POST /broadcasts/{id}/send` (operationId `sendBroadcast`, Broadcasts).

    Annotations the server declares

    • title: Send or schedule a broadcast
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • send_emailSend an email.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "send_email" says "send": a word for sending, and what is sent cannot be taken back.
    • The input addresses people (input.to): what it sends cannot be taken back.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • outboundThe name "send_email" says "send": it sends or publishes something to other people.
    • outboundThe input takes a destination (input.to): what the tool writes goes there.
    Description, as the server wrote it
    Send 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` domain belongs to one). Fails with `422` if `tenant_id` conflicts with the domain's tenant, `403 sending_paused` if the tenant is paused and `429 daily_quota_exceeded` if it reached its daily cap. `from` must be on a verified domain (e.g. "Acme <hi@acme.com>"); call list_domains to find one. Provide `html`, `text` or both. Send to delivered@test.spacepost.dev (or bounced@ / complained@) to test without sending real mail. Delivered email cannot be recalled: confirm recipients and content with the user when unsure. Pass `idempotency_key` when retrying so the email is not sent twice. Request body: Either `html` or `text` is required. `reply_to` is also accepted as `replyTo` and `scheduled_at` as `scheduledAt`. Works with a `sending_access` or `full_access` API key. API: `POST /emails` (operationId `sendEmail`, Emails).

    Annotations the server declares

    • title: Send an email
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: true
  • update_broadcastUpdate a broadcast.Can send data outNo findings

    Why it is in this group

    • The name "update_broadcast" says "update": a word for a change.
    • The name "update_broadcast" also says "broadcast": a word for sending, and what is sent cannot be taken back.

    What it can reach

    • outboundThe name "update_broadcast" says "broadcast": it sends or publishes something to other people.
    Description, as the server wrote it
    Update 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`, Broadcasts).

    Annotations the server declares

    • title: Update a broadcast
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
Changes things 14Claude Code: ask
  • create_api_keyCreate an API key.No findings

    Why it is in this group

    • The name "create_api_key" says "create": a word for a change.
    Description, as the server wrote it
    Create 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).

    Annotations the server declares

    • title: Create an API key
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • create_audienceCreate an audience.No findings

    Why it is in this group

    • The name "create_audience" says "create": a word for a change.
    Description, as the server wrote it
    Create an audience. Requires a `full_access` API key. API: `POST /audiences` (operationId `createAudience`, Audiences).

    Annotations the server declares

    • title: Create an audience
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • create_contactCreate a contact.No findings

    Why it is in this group

    • The name "create_contact" says "create": a word for a change.
    Description, as the server wrote it
    Create 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).

    Annotations the server declares

    • title: Create a contact
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • create_domainCreate a domain.No findings

    Why it is in this group

    • The name "create_domain" says "create": a word for a change.
    Description, as the server wrote it
    Create 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 (Free 3, Pro 10, Scale 1,000). The response lists the DNS records (DKIM CNAMEs, MAIL FROM MX and SPF TXT) the user must add at their DNS provider; afterwards call verify_domain and then get_domain to see the new status. DNS changes can take minutes to hours. Requires a `full_access` API key. API: `POST /domains` (operationId `createDomain`, Domains).

    Annotations the server declares

    • title: Create a domain
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • create_suppressionAdd a suppression.No findings

    Why it is in this group

    • The name "create_suppression" says "create": a word for a change.
    Description, as the server wrote it
    Add 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 `createSuppression`, Suppressions).

    Annotations the server declares

    • title: Add a suppression
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • create_tenantCreate a tenant.No findings

    Why it is in this group

    • The name "create_tenant" says "create": a word for a change.
    Description, as the server wrote it
    Create a tenant. Creates one of your customers, with its own SES tenant (isolated reputation). `external_id` must be unique within your account. Requires a `full_access` API key. API: `POST /tenants` (operationId `createTenant`, Tenants).

    Annotations the server declares

    • title: Create a tenant
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • create_webhookCreate a webhook.Can send data outNo findings

    Why it is in this group

    • The name "create_webhook" says "create": a word for a change.

    What it can reach

    • outboundThe input takes a URL (input.endpoint): a request to a URL can carry data to whoever runs it.
    Description, as the server wrote it
    Create 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).

    Annotations the server declares

    • title: Create a webhook
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • unpause_tenantUnpause a tenant.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Unpause a tenant. Resumes sending. A tenant that was paused by the reputation guard (bounce or complaint rate) can only be unpaused by a `trusted` or `internal` team; others get `403 invalid_access` and should contact support. Requires a `full_access` API key. API: `POST /tenants/{ref}/unpause` (operationId `unpauseTenant`, Tenants).

    Annotations the server declares

    • title: Unpause a tenant
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • update_contactUpdate a contact.No findings

    Why it is in this group

    • The name "update_contact" says "update": a word for a change.
    Description, as the server wrote it
    Update a contact. Requires a `full_access` API key. API: `PATCH /audiences/{audienceId}/contacts/{idOrEmail}` (operationId `updateContact`, Contacts).

    Annotations the server declares

    • title: Update a contact
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • update_domainUpdate a domain.No findings

    Why it is in this group

    • The name "update_domain" says "update": a word for a change.
    Description, as the server wrote it
    Update a domain. Toggles open and click tracking. Requires a `full_access` API key. API: `PATCH /domains/{id}` (operationId `updateDomain`, Domains).

    Annotations the server declares

    • title: Update a domain
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • update_emailReschedule an email.Can send data outNo findings

    Why it is in this group

    • The name "update_email" says "update": a word for a change.

    What it can reach

    • outboundThe name "update_email" says "update" and "email": it writes something other people read.
    Description, as the server wrote it
    Reschedule 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).

    Annotations the server declares

    • title: Reschedule an email
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • update_tenantUpdate a tenant.No findings

    Why it is in this group

    • The name "update_tenant" says "update": a word for a change.
    Description, as the server wrote it
    Update a tenant. Changes the name, `external_id` or `daily_limit` (`null` removes the cap). Requires a `full_access` API key. API: `PATCH /tenants/{ref}` (operationId `updateTenant`, Tenants).

    Annotations the server declares

    • title: Update a tenant
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • update_webhookUpdate a webhook.Can send data outNo findings

    Why it is in this group

    • The name "update_webhook" says "update": a word for a change.

    What it can reach

    • outboundThe input takes a URL (input.endpoint): a request to a URL can carry data to whoever runs it.
    Description, as the server wrote it
    Update a webhook. Requires a `full_access` API key. API: `PATCH /webhooks/{id}` (operationId `updateWebhook`, Webhooks).

    Annotations the server declares

    • title: Update a webhook
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false
  • verify_domainVerify a domain.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Verify 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).

    Annotations the server declares

    • title: Verify a domain
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
Only reads 17Show 17 read-only tools
  • get_audienceRetrieve an audience.No findings

    Why it is in this group

    • The name "get_audience" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve an audience. Requires a `full_access` API key. API: `GET /audiences/{id}` (operationId `getAudience`, Audiences).

    Annotations the server declares

    • title: Retrieve an audience
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_broadcastRetrieve a broadcast.No findings

    Why it is in this group

    • The name "get_broadcast" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve a broadcast. Requires a `full_access` API key. API: `GET /broadcasts/{id}` (operationId `getBroadcast`, Broadcasts).

    Annotations the server declares

    • title: Retrieve a broadcast
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_broadcast_readinessCheck a broadcast before sending.No findings

    Why it is in this group

    • The name "get_broadcast_readiness" says "get": a word for reading.
    Description, as the server wrote it
    Check 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, spam phrases, unsubscribe link and audience quality. `ready` is false when any check has level `error`; `POST /broadcasts/{id}/send` is then refused with `validation_error`. Warnings never block a send. Requires a `full_access` API key. API: `GET /broadcasts/{id}/readiness` (operationId `getBroadcastReadiness`, Broadcasts).

    Annotations the server declares

    • title: Check a broadcast before sending
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_contactRetrieve a contact.Reads private dataNo findings

    Why it is in this group

    • The name "get_contact" says "get": a word for reading.

    What it can reach

    • private-dataThe name "get_contact" says "get" and "contact": it reads contacts.
    • private-dataThe description's first sentence says "retrieve" and "contact": it reads contacts.
    Description, as the server wrote it
    Retrieve a contact. Requires a `full_access` API key. API: `GET /audiences/{audienceId}/contacts/{idOrEmail}` (operationId `getContact`, Contacts).

    Annotations the server declares

    • title: Retrieve a contact
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_domainRetrieve a domain.No findings

    Why it is in this group

    • The name "get_domain" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve a domain. Requires a `full_access` API key. API: `GET /domains/{id}` (operationId `getDomain`, Domains).

    Annotations the server declares

    • title: Retrieve a domain
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_emailRetrieve an email.Reads private dataReads text others writeNo findings

    Why it is in this group

    • The name "get_email" says "get": a word for reading.

    What it can reach

    • private-dataThe name "get_email" says "get" and "email": it reads mail.
    • private-dataThe description's first sentence says "retrieve" and "email": it reads mail.
    • untrusted-inputThe name "get_email" says "get" and "email": it reads inbound email, which other people can write.
    • untrusted-inputThe description's first sentence says "retrieve" and "email": it reads inbound email, which other people can write.
    Description, as the server wrote it
    Retrieve an email. Requires a `full_access` API key. API: `GET /emails/{id}` (operationId `getEmail`, Emails).

    Annotations the server declares

    • title: Retrieve an email
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_tenantRetrieve a tenant.No findings

    Why it is in this group

    • The name "get_tenant" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve a tenant. Requires a `full_access` API key. API: `GET /tenants/{ref}` (operationId `getTenant`, Tenants).

    Annotations the server declares

    • title: Retrieve a tenant
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • get_webhookRetrieve a webhook.No findings

    Why it is in this group

    • The name "get_webhook" says "get": a word for reading.
    Description, as the server wrote it
    Retrieve a webhook. Requires a `full_access` API key. API: `GET /webhooks/{id}` (operationId `getWebhook`, Webhooks).

    Annotations the server declares

    • title: Retrieve a webhook
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_api_keysList API keys.No findings

    Why it is in this group

    • The name "list_api_keys" says "list": a word for reading.
    Description, as the server wrote it
    List API keys. Requires a `full_access` API key. API: `GET /api-keys` (operationId `listApiKeys`, API Keys).

    Annotations the server declares

    • title: List API keys
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_audiencesList audiences.No findings

    Why it is in this group

    • The name "list_audiences" says "list": a word for reading.
    Description, as the server wrote it
    List audiences. Requires a `full_access` API key. API: `GET /audiences` (operationId `listAudiences`, Audiences).

    Annotations the server declares

    • title: List audiences
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_broadcastsList broadcasts.No findings

    Why it is in this group

    • The name "list_broadcasts" says "list": a word for reading.
    Description, as the server wrote it
    List broadcasts. Requires a `full_access` API key. API: `GET /broadcasts` (operationId `listBroadcasts`, Broadcasts).

    Annotations the server declares

    • title: List broadcasts
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_contactsList contacts.Reads private dataNo findings

    Why it is in this group

    • The name "list_contacts" says "list": a word for reading.

    What it can reach

    • private-dataThe name "list_contacts" says "list" and "contact": it reads contacts.
    • private-dataThe description's first sentence says "list" and "contact": it reads contacts.
    Description, as the server wrote it
    List contacts. Requires a `full_access` API key. API: `GET /audiences/{audienceId}/contacts` (operationId `listContacts`, Contacts).

    Annotations the server declares

    • title: List contacts
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_domainsList domains.No findings

    Why it is in this group

    • The name "list_domains" says "list": a word for reading.
    Description, as the server wrote it
    List domains. Requires a `full_access` API key. API: `GET /domains` (operationId `listDomains`, Domains).

    Annotations the server declares

    • title: List domains
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_emailsList emails.Reads private dataReads text others writeNo findings

    Why it is in this group

    • The name "list_emails" says "list": a word for reading.

    What it can reach

    • private-dataThe name "list_emails" says "list" and "email": it reads mail.
    • private-dataThe description's first sentence says "list" and "email": it reads mail.
    • untrusted-inputThe name "list_emails" says "list" and "email": it reads inbound email, which other people can write.
    • untrusted-inputThe description's first sentence says "list" and "email": it reads inbound email, which other people can write.
    Description, as the server wrote it
    List emails. Returns sent and scheduled emails, newest first, without bodies. Requires a `full_access` API key. API: `GET /emails` (operationId `listEmails`, Emails).

    Annotations the server declares

    • title: List emails
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_suppressionsList suppressions.No findings

    Why it is in this group

    • The name "list_suppressions" says "list": a word for reading.
    Description, as the server wrote it
    List suppressions. Requires a `full_access` API key. API: `GET /suppressions` (operationId `listSuppressions`, Suppressions).

    Annotations the server declares

    • title: List suppressions
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_tenantsList tenants.No findings

    Why it is in this group

    • The name "list_tenants" says "list": a word for reading.
    Description, as the server wrote it
    List tenants. Requires a `full_access` API key. API: `GET /tenants` (operationId `listTenants`, Tenants).

    Annotations the server declares

    • title: List tenants
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false
  • list_webhooksList webhooks.No findings

    Why it is in this group

    • The name "list_webhooks" says "list": a word for reading.
    Description, as the server wrote it
    List webhooks. Requires a `full_access` API key. API: `GET /webhooks` (operationId `listWebhooks`, Webhooks).

    Annotations the server declares

    • title: List webhooks
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

160 paths in this server alone from private data, through text someone else wrote, to a way out. Denying 4 private-data tools breaks every one.

Reads private data4
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write5
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out8
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.
deny to break every path
{
  "permissions": {
    "deny": [
      "mcp__spacepost__get_contact",
      "mcp__spacepost__get_email",
      "mcp__spacepost__list_contacts",
      "mcp__spacepost__list_emails"
    ]
  }
}

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 0.2.2-1. Values in angle brackets are yours to fill in.

claude mcp add --transport http spacepost https://api.spacepost.dev/mcp --header 'Authorization: <your-authorization>'
claude mcp add --transport http spacepost https://api.spacepost.dev/mcp --header 'Authorization: <your-authorization>'

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__spacepost__list_emails",
      "mcp__spacepost__get_email",
      "mcp__spacepost__list_domains",
      "mcp__spacepost__get_domain",
      "mcp__spacepost__list_api_keys",
      "mcp__spacepost__list_webhooks",
      "mcp__spacepost__get_webhook",
      "mcp__spacepost__list_audiences",
      "mcp__spacepost__get_audience",
      "mcp__spacepost__list_contacts",
      "mcp__spacepost__get_contact",
      "mcp__spacepost__list_broadcasts",
      "mcp__spacepost__get_broadcast",
      "mcp__spacepost__get_broadcast_readiness",
      "mcp__spacepost__list_suppressions",
      "mcp__spacepost__list_tenants",
      "mcp__spacepost__get_tenant"
    ],
    "ask": [
      "mcp__spacepost__send_email",
      "mcp__spacepost__send_batch_emails",
      "mcp__spacepost__update_email",
      "mcp__spacepost__create_domain",
      "mcp__spacepost__update_domain",
      "mcp__spacepost__verify_domain",
      "mcp__spacepost__create_api_key",
      "mcp__spacepost__create_webhook",
      "mcp__spacepost__update_webhook",
      "mcp__spacepost__create_audience",
      "mcp__spacepost__create_contact",
      "mcp__spacepost__update_contact",
      "mcp__spacepost__create_broadcast",
      "mcp__spacepost__update_broadcast",
      "mcp__spacepost__send_broadcast",
      "mcp__spacepost__create_suppression",
      "mcp__spacepost__create_tenant",
      "mcp__spacepost__update_tenant",
      "mcp__spacepost__unpause_tenant"
    ],
    "deny": [
      "mcp__spacepost__cancel_email",
      "mcp__spacepost__delete_domain",
      "mcp__spacepost__delete_api_key",
      "mcp__spacepost__delete_webhook",
      "mcp__spacepost__delete_audience",
      "mcp__spacepost__delete_contact",
      "mcp__spacepost__delete_broadcast",
      "mcp__spacepost__delete_suppression",
      "mcp__spacepost__delete_tenant",
      "mcp__spacepost__pause_tenant"
    ]
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as spacepost. Review it before you use it.

Capability tags behind 12 rules
  • mcp__spacepost__list_emails private-data, untrusted-input
  • mcp__spacepost__send_email untrusted-input, outbound
  • mcp__spacepost__send_batch_emails untrusted-input, outbound
  • mcp__spacepost__get_email private-data, untrusted-input
  • mcp__spacepost__update_email outbound
  • mcp__spacepost__create_webhook outbound
  • mcp__spacepost__update_webhook outbound
  • mcp__spacepost__list_contacts private-data
  • mcp__spacepost__get_contact private-data
  • mcp__spacepost__create_broadcast outbound
  • mcp__spacepost__update_broadcast outbound
  • mcp__spacepost__send_broadcast untrusted-input, outbound

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/dev.spacepost/mcp/verify?hash=e9a7da4b1e1d2e0ab65746ea2464ea95d57564e50623f646f98959e72b641f38" | jq -e '.changed == false'

Pinned hash e9a7da4b1e1d, from Oct 30, 2026, 17:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/dev.spacepost/mcp/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Badge

anlyon.dev badge for dev.spacepost/mcp
[![anlyon.dev](https://anlyon.dev/badge/dev.spacepost/mcp.svg)](https://anlyon.dev/servers/dev.spacepost/mcp)

Source: MCP Registry · repository. Synced Oct 30, 2026, 17:17 UTC.