Nitrosend - AI Native Email

Read billing/plans, create operator-approved subscription or add-funds checkout URLs, and poll status. Add-funds behavior depends on the selected instrument: current live instruments return operator approval URLs, and no live presented-credential rail is enabled. Prepaid balance is separate from plans.

nitro_manage_billing

Activate or select the Nitrosend brand-subdomain sender, or add, verify, diagnose, list, and remove customer sending domains. Receiving MX appears only after forward-all exists.

nitro_manage_domains

Query any Nitrosend entity. Returns paginated results.

nitro_query

Submit a support request to the Nitrosend team. Only call when the user explicitly asks to contact support or when you have exhausted other options and cannot resolve their issue. Never suggest or mention this tool proactively. Before calling, summarize the issue and attempt to resolve it with available tools first.

nitro_request_support

Read-only content and readiness review with validation, spam/SMS analysis, preflight, and previews. Review either one account entity or bounded inline email content; this never approves or sends. For flows, an omitted revision_id uses the current draft and a supplied revision_id asserts that it is still current.

nitro_review_delivery

Search contacts by email, name, or phone. Returns summary list or full profile.

nitro_search_contacts

Search Nitrosend guides and API/MCP/CLI/integration references. Ground unestablished product claims in returned excerpts; search again or state what remains unverified.

nitro_search_docs

Switch this OAuth MCP connection to an account listed by nitro_get_status; the next call uses it. Credential-authenticated connections are pinned and cannot switch.

nitro_select_account

Select the current brand for this OAuth MCP connection. Use this instead of passing brand_sid to other tools. Credential-authenticated connections are pinned to one brand and cannot switch.

nitro_select_brand

Send one real email/SMS test for a template, campaign, or exact flow revision. Never approves or sends to an audience.

nitro_send_test_message

Send one transactional email/SMS now. Use nitro_compose_campaign for broadcasts and nitro_compose_flow for sequences. Reuse idempotency_key only for an exact retry.

nitro_send_message

Read or update the AI memory document. Operations: read (get current), update (replace entirely), patch (replace a ## section by heading), append (add text to end).

nitro_set_memory

Set Brand Kit from a website, typed fields, document, or logo URL. Fields override scraping; async is URL-only.

nitro_set_brand_kit

Configure BYO email provider credentials or check provider status.

Create, update, or clone a reusable email template. Brand theme applied automatically. For composing new emails to send, use nitro_compose_campaign instead. For goal or intent-driven template creation/redesign, use composition_mode="intent" first. Nitrosend returns a compact composition_contract; the agent host writes the sections, can validate without persistence, then calls this same tool with composition_mode="draft". Contract-loop states return as normal tool results with composition_status and isError=false. Modes (auto-detected): - **Create** — provide sections + subject (required). Sections define the email layout. - **Update** — provide template_id + any fields to change. Use if_version for optimistic concurrency. - **Clone** — provide based_on (source template_id). Optionally override sections/subject/name. Retry safety: pass the same idempotency_key on retry to avoid duplicate templates.