Nitrosend
Nitrosend is AI-Native Email — campaigns, automation flows and transactional email, run end to end from Claude, ChatGPT, Codex, Cursor or any MCP client.
Community: Submitted by a user or imported; check the owner before granting accessOnlineNo sign-inGlobalFreeCan modify data
What it can do
- Nitro Get Status: Get current account context, sender identity, dashboard links, readiness, onboarding status, and recommendations.
- Nitro Select Account: 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 Brand: 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 canno
What data it sees
Do you need an account
No: the server works without sign-in
Nitrosend is AI-Native Email — campaigns, automation flows and transactional email, run end to end from Claude, ChatGPT, Codex, Cursor or any MCP client. No dashboard required.
What your agent can do
- Audience — import, search and update contacts; manage lists, tags and events; build and preview segments with live counts
- Compose — branded email templates, multi-step automation flows, and email or SMS campaigns, styled from a brand kit scraped off your own site
- Review — spam and preflight checks, rendered previews, and real test sends before anything goes out
- Deliver — approve, schedule and control sends, with approval always a separate step
- Domains — add a sending domain, get its DNS records, and verify them
- Insights — opens, clicks, unsubscribes and trends, against benchmarks
- Plus — transactional sends, a reply inbox your agent can work, BYO sending providers, billing, and searchable docs
Composing never sends. Compose tools only ever produce drafts; delivery is a separate, explicitly approved call. An agent can build an entire campaign with no risk of mailing your list by accident.
Free forever on $0 — full MCP access, 8,000 emails up front then 500/month, and unlimited contacts on every plan. No credit card.
Server tool list (28)
Raw names from tools/list. Only developers need these.
| nitro_get_status | Get current account context, sender identity, dashboard links, readiness, onboarding status, and recommendations. |
| nitro_select_account | 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_brand | 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_query | Query any Nitrosend entity. Returns paginated results. |
| nitro_search_contacts | Search contacts by email, name, or phone. Returns summary list or full profile. |
| nitro_set_brand_kit | Set Brand Kit from a website, typed fields, document, or logo URL. Fields override scraping; async is URL-only. |
| nitro_ingest | Validate and store an image in the brand library. Use image_data for small images, upload then signed_id for local files, or image_url for external/generated assets. Returns a durable email URL. |
| nitro_manage_audience | Create or update contacts, manage subscriptions, lists, events, segments, and tags. Custom contact fields belong in attributes.data. For more than 100 contact writes, use nitro_import_contacts with CSV. |
| nitro_manage_outreach | Discover named people for outreach: intent, estimate, then start. Companies are evidence, never recipients. start requires the quoted USD-cent spend cap and idempotency key. |
| nitro_define_segment | Preview or persist a filtered contact segment. preview_only defaults true; set false and provide name to save. |
| nitro_import_contacts | Import up to 100 inline contacts or use the CSV upload/finalize path for up to 250k. Existing subscription state is preserved unless opt_in is explicit; SMS opt-in must be explicit. |
| nitro_manage_template | Create, edit, or clone a reusable email template. For a creative design, start with composition_mode=intent and follow its exact next_call. Exact edits use template_id, section_updates, and if_version; based_on clones. Use nitro_compose_campaign for broadcasts. |
| nitro_compose_flow | Create or edit an automation-flow draft; never activates it. For creative email, start with composition_mode=intent and follow its exact next_call. Multi-email flows choose routes per action_name. replace requires flow_id, confirm, and the draft revision; patch preserves other nodes. Activation uses nitro_control_delivery. |
| nitro_compose_campaign | Create or edit an email/SMS broadcast draft; never delivers it. For creative email, start with composition_mode=intent and follow its exact next_call. patch preserves omitted fields; replace requires campaign_id and confirm, and clears omitted audience or schedule. Use nitro_compose_flow for automation and nitro_send_message for transactional mail. |
| nitro_manage_domains | Add, verify, diagnose, list, or remove sending domains. Add returns customer DNS records; check_dns validates DNS and tracking HTTPS. Receiving MX appears only after forward-all exists, protecting the active mailbox provider. |
| nitro_configure_account | Read or configure sender defaults and test recipients. Use nitro_get_status for readiness; from_email must be authorized by a verified sending domain. |
| nitro_review_delivery | Read-only content and readiness review with validation, spam/SMS analysis, preflight, and previews. Flow review needs exact revision_id; this never approves or sends. |
| nitro_send_test_message | Send one real email/SMS test for a template, campaign, or exact flow revision. Never approves or sends to an audience. |
| nitro_control_delivery | Approve or control flow/campaign delivery after review. Requires the reviewed brand sid; resume never publishes a draft, and flow publication requires its exact revision. |
| nitro_get_insights | Get email analytics with trends, benchmarks, and recommendations. |
| nitro_configure_providers | Configure BYO email provider credentials or check provider status. |
| nitro_set_memory | 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_manage_billing | Read billing/plans, create operator-approved subscription or add-funds checkout URLs, and poll status. This tool never pays; the operator opens the URL. Prepaid balance is separate from plans. |
| nitro_send_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_inbox | Read the agent queue or mailbox. Follow exact next_calls for older or truncated thread content. |
| nitro_inbox_action | Mutate an agent inbox item or mailbox thread. Commands: send_reply, send_reply_test, mark_handled, request_human, release_to_agent, mark_quarantine. |
| nitro_request_support | Submit support only when asked or tools cannot resolve the issue; never promote it. Send a complete message within 1500 characters; there is no truncation. |
| nitro_search_docs | Search Nitrosend guides and API/MCP/CLI/integration references. Ground unestablished product claims in returned excerpts; search again or state what remains unverified. |