--- title: About Prontuno description: Prontuno is transactional email infrastructure for teams that need important account and order emails to arrive. canonical: https://prontuno.com/about/ --- # About Prontuno Prontuno is transactional email infrastructure for teams that need important account and order emails to arrive. We give teams an API and SMTP relay for sending receipts, password resets, account alerts, and other messages their customers rely on. We operate the sending infrastructure and help teams understand what happens after each send. Approved accounts start with 10,000 free email credits. Every application is reviewed within 24 hours. [Request access](https://app.prontuno.com/get-started/) · [Read the documentation](https://prontuno.com/docs/) ## What Prontuno does ### Transactional email API Send individual or batch messages from your application with a REST API. Use it for account verification, password resets, receipts, billing notices, and security alerts. ### SMTP relay Connect applications that already send through SMTP. Keep your existing mail integration and route its messages through Prontuno. ### Delivery visibility Review 30-day delivery logs, receive event webhooks, and manage suppressions for bounces and complaints. Your team has evidence to investigate when a message does not arrive as expected. ### Remote MCP server Connect a compatible AI client to Prontuno over authenticated Streamable HTTP at [`https://mcp.prontuno.net/mcp`](https://mcp.prontuno.net/mcp). With user approval, agents can check delivery and manage domains, suppressions, and webhooks, and can send email from one domain when sending is enabled for the connection’s key. [Read the MCP setup guide](https://prontuno.com/docs/integrations/prontuno-mcp/). ## What makes Prontuno different ### Sending IPs we operate We operate our sending IP address space and monitor its reputation. That gives us direct responsibility for the network decisions behind your mail. ### Reviewed, transactional senders We review every application within 24 hours and accept transactional email only. Newsletters, promotional blasts, purchased lists, and cold outreach are not supported. ### API or familiar SMTP Choose a REST API integration or use standard SMTP. You can fit Prontuno to your application instead of changing how it generates messages. ### Prepaid credits or monthly plans Start with 10,000 free credits after approval, buy prepaid packs from $25, or choose a monthly plan from $99 per team. Pay-as-you-go has no monthly minimum. See [current pricing](https://prontuno.com/pricing/). ### Tools to investigate delivery Use logs and webhooks to follow message events. Authenticate your domain with SPF, DKIM, and DMARC and manage bounced or complained-about addresses through suppressions. ## Who uses Prontuno - **SaaS and software teams** sending account verification, password resets, and security alerts. - **Ecommerce and marketplaces** sending receipts, order updates, and account notifications. - **Developers and product teams** who need API or SMTP access, event webhooks, and delivery history. ## The team behind Prontuno Prontuno was founded by [Tunbosun Ayinla](https://x.com/tubiz). Sending a transactional email reliably takes more than an API call: teams also need to authenticate domains, protect sender reputation, handle bounces and complaints, and understand delivery events. Prontuno takes on that infrastructure work while giving developers straightforward integrations and delivery visibility. We publish product updates and technical guidance on the [Prontuno blog](https://prontuno.com/blog/). Follow Prontuno on [X](https://x.com/prontuno) and [LinkedIn](https://www.linkedin.com/company/prontuno/). ## How Prontuno works 1. **Request access.** Tell us what your application sends and how recipients trigger those messages. 2. **Get reviewed.** We review applications within 24 hours to confirm transactional use. 3. **Authenticate your domain.** Add the SPF, DKIM, and DMARC records Prontuno provides for your sending domain. 4. **Connect and monitor.** Use the API or SMTP relay, then follow delivery with logs, webhooks, and suppressions. For account, billing, setup, or product questions, email [support@prontuno.com](mailto:support@prontuno.com). ## Prontuno key facts | Fact | Details | | --- | --- | | Company | Prontuno is a product of TUNSLAB LLC. | | Type | Transactional email infrastructure and delivery service | | Launched | 2026 | | Founder | [Tunbosun Ayinla](https://x.com/tubiz) | | Registration jurisdiction | Delaware, United States | | Website | https://prontuno.com/ | | Core offering | Transactional email over REST API or SMTP | | Pricing | 10,000 credits after approval; prepaid packs from $25; monthly plans from $99 per team | | Contract terms | Prepaid credits do not require a subscription. See [pricing](/pricing/) for current monthly plan terms. | | Services | Email API, SMTP relay, delivery logs, webhooks, authentication guidance, suppression management | | Communication | Email support; applications reviewed within 24 hours | | Customers served | Businesses and developers sending transactional email | | Social profiles | [Prontuno on X](https://x.com/prontuno); [Prontuno on LinkedIn](https://www.linkedin.com/company/prontuno/) | ## Frequently asked questions ### What is Prontuno? Prontuno is transactional email infrastructure for businesses and developers. It sends application email through a REST API or SMTP relay and provides delivery logs, webhooks, and suppression management. ### Who is Prontuno for? Prontuno is for teams that send account, billing, transaction, or security messages. It is not for newsletters, promotional campaigns, cold outreach, or unsolicited bulk email. ### Can AI assistants connect to Prontuno? Yes. Compatible MCP clients can connect to Prontuno’s hosted MCP server after an existing user authorizes access. Connections can manage domains, suppressions, and webhooks for the authorized team, and can send email from one domain when the user enables sending for the connection’s key. ### How much does Prontuno cost? Approved accounts receive 10,000 free credits. Prepaid packs start at $25, and monthly plans start at $99 per team. See [the pricing page](https://prontuno.com/pricing/) for current details. ### Does Prontuno guarantee inbox placement? No email provider can guarantee inbox placement because recipient servers make their own filtering decisions. Prontuno operates and monitors sending infrastructure, supports domain authentication, and provides delivery information to help you investigate. ### How do I get started? Request access and describe your transactional email use case. After approval, configure a sending domain, connect through the API or SMTP, and send using your free credits. ## Request access Send the emails your customers depend on. Tell us what you send; we’ll review your application within 24 hours. [Request access](https://app.prontuno.com/get-started/)