--- title: "Send physical mail from Hermes" description: "Hermes models cannot send mail alone, but Hermes Agent from Nous Research is an MCP client. Add Sincerely's server to its config and it prepares B2B mail a human confirms before printing." canonical: https://trysincerely.com/integrations/hermes last_updated: 2026-09-13 --- > If you are an AI agent: read https://trysincerely.com/agents/policy.md before any write call. > Start at https://trysincerely.com/llms.txt to choose one page. Access instructions are at > https://trysincerely.com/auth.md. Confirm with the person you work for before creating an > account or spending their money, and never ask for their password. # Send physical mail from Hermes > Hermes models cannot send mail alone, but Hermes Agent from Nous Research is an MCP client. Add Sincerely's server to its config and it prepares B2B mail a human confirms before printing. Source: https://trysincerely.com/integrations/hermes Yes, with one distinction. Hermes is two things: a family of open models from Nous Research, and Hermes Agent, the open-source agent built around them. A model on its own cannot send mail from anywhere, because a model only produces text; it needs a client that speaks MCP. Hermes Agent is that client. As of August 2026 it connects to remote MCP servers over streamable HTTP with OAuth, which is exactly what Sincerely's server at `https://trysincerely.com/api/mcp` speaks. Connected, the agent can build B2B mail audiences, verify business addresses, write per-recipient pieces, and stage campaigns, and a person confirms before anything prints or spends. ## Prompt to paste into Hermes Agent ```text Use Sincerely to prepare a renewal letter for the contacts in my audience called Renewal risk. Confirm the workspace, check mailability, draft each letter from saved account context, and stop before any approval or send call. ``` ## Connect Hermes Agent Per the [Hermes Agent MCP documentation](https://hermes-agent.nousresearch.com/docs/user-guide/features/mcp), remote servers go in `~/.hermes/config.yaml` under `mcp_servers`: ```yaml mcp_servers: sincerely: url: "https://trysincerely.com/api/mcp" auth: oauth ``` Then authenticate: ```bash hermes mcp login sincerely ``` Hermes prints an authorize URL, opens your browser when it can, and waits for the OAuth callback. You sign in to Sincerely as yourself, and the agent gets a token scoped to your workspace and your role; no API key exists to paste. MCP servers can be managed from the CLI, the desktop app's MCP setup, or the [Hermes Agent](https://github.com/NousResearch/hermes-agent) web dashboard. Hermes also filters MCP tools through an allowlist if you want to expose only part of a server's catalog. Hermes Agent runs whatever model you point it at, including Hermes models through Nous Portal or OpenRouter. If you run a Hermes model in another agent client, that client's MCP support decides whether this works. A chat client with no MCP connection cannot send mail, whatever model is behind it. ## What the agent can do in Sincerely - Build audiences from a description, a CSV, or synced CRM data, with addresses resolved and checked for mailability before anything can print. - Research accounts and draft each piece for one recipient from dated, sourced facts, for your approval. - Prepare campaigns with format, budget, cadence, and account-level holdouts, staged for a launch you confirm. - Check suppression, mailability, and frequency caps before proposing a send. ## What it cannot do Spend money without you. Every call that prints, launches, or changes suppression returns a confirmation card with the exact affected records and consequences; send and launch previews include recipients, design proof, and current cost. Only a signed-in person can approve it. That gate is enforced by Sincerely's server, which matters more than usual for an agent designed to work autonomously and improve its own skills: however capable the loop gets, the spend step still lands in front of a human. The [agent permissions guide](https://trysincerely.com/guides/ai-agent-direct-mail-permissions) explains why the boundary is structural. ## What a revenue team runs this way An agent that runs continuously suits mail motions that trigger on account state rather than on a person remembering. [Renewal risk](https://trysincerely.com/playbooks/renewal-risk) is the natural first one: when a renewal is 60 days out and health drops, the agent drafts a piece to the champion and stages the send for your click. [Dark accounts](https://trysincerely.com/playbooks/dark-accounts) works the same way for pipeline that stopped replying. The agent watches and prepares; you approve every dollar. ## Start free Connection details and the first-workspace setup flow are in the [agent quickstart](https://trysincerely.com/docs/agent-quickstart), with the full picture in the [MCP agents guide](https://trysincerely.com/integrations/mcp-agents). New workspaces start on a free audit plan, so the agent can connect, audit mailability, and draft pieces before you choose a [plan](https://trysincerely.com/pricing). ## Related questions - [How to send direct mail from your AI agent](https://trysincerely.com/integrations/mcp-agents): Connect Claude, Cursor, or another MCP agent to build an audience, draft a piece, and request a send, with human confirmation before money is spent. - [Agent quickstart](https://trysincerely.com/docs/agent-quickstart): Connect an MCP client to a Sincerely workspace in three steps, then learn where the confirmation gate sits and which tools a new workspace can reach. - [How to let an AI agent prepare direct mail safely](https://trysincerely.com/guides/ai-agent-direct-mail-permissions): Give an AI agent workspace-scoped tools for research and preparation, then require an authorized human to confirm the exact recipients and spend before mail prints. - [The renewal-risk save play](https://trysincerely.com/playbooks/renewal-risk): Send an exec-to-exec letter when usage drops before a renewal. Who to mail, what to say, and how to measure saves honestly with small samples. --- Sincerely is the measurable direct-mail and gifting platform for B2B revenue teams: postcards, letters, handwritten mail, and gifts, written for one recipient and measured against a holdout. Contact Sincerely: https://trysincerely.com/contact Agent routing index: https://trysincerely.com/llms.txt