# How to integrate Postgrid MCP with Hermes

```json
{
  "title": "How to integrate Postgrid MCP with Hermes",
  "toolkit": "Postgrid",
  "toolkit_slug": "postgrid",
  "framework": "Hermes",
  "framework_slug": "hermes-agent",
  "url": "https://composio.dev/toolkits/postgrid/framework/hermes-agent",
  "markdown_url": "https://composio.dev/toolkits/postgrid/framework/hermes-agent.md",
  "updated_at": "2026-05-06T08:24:13.676Z"
}
```

## Introduction

Hermes is a 24/7 autonomous agent that lives on your computer or server — it remembers what it learns and evolves as your usage grows.
This guide explains the easiest and most robust way to connect your Postgrid account to Hermes. You can do this through either Composio Connect CLI or Composio Connect MCP. For personal use we recommend the CLI, but you won't go wrong with MCP either.

## Also integrate Postgrid with

- [OpenAI Agents SDK](https://composio.dev/toolkits/postgrid/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/postgrid/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/postgrid/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/postgrid/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/postgrid/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/postgrid/framework/openclaw)
- [CLI](https://composio.dev/toolkits/postgrid/framework/cli)
- [Google ADK](https://composio.dev/toolkits/postgrid/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/postgrid/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/postgrid/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/postgrid/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/postgrid/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/postgrid/framework/crew-ai)

## TL;DR

### What is Composio Connect?
Composio Connect is a consumer offering that lets anyone plug 1,000+ applications directly into their agent harness — including Hermes. It can:
- Search and load tools from relevant toolkits on-demand, reducing context usage.
- Chain multiple tools to accomplish complex workflows via a remote workbench, without excessive back-and-forth with the LLM.
- Manage app authentication end-to-end with zero manual overhead.

## Connect Postgrid to Hermes

### Integrating Postgrid with Hermes
### Using Composio Connect CLI
1. Install the Composio CLI
Run the install script directly, or paste https://composio.dev/hermes into your Hermes chat box to have it installed for you.

```bash
curl -fsSL https://composio.dev/install | bash
```

## What is the Postgrid MCP server, and what's possible with it?

The Postgrid MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Postgrid account. It provides structured and secure access to your direct mail and address automation tools, so your agent can verify addresses, send letters, manage contacts, and handle templates for your business communications—all without manual intervention.
- Automated letter sending: Have your agent create and send physical letters on demand, handling recipient, sender, and content details seamlessly.
- Contact management: Effortlessly add, update, or delete contacts in your Postgrid account to keep your mailing lists accurate and up to date.
- Template creation and maintenance: Let your agent generate reusable mail templates with dynamic placeholders, and remove outdated templates as needed.
- Bank account and payment management: Create or delete bank accounts associated with print and mail services, ensuring smooth financial operations for mail automation.
- Webhook setup and monitoring: Enable your agent to create or remove webhooks to track events and receive real-time notifications for your mail orders and services.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `POSTGRID_CREATE_BANK_ACCOUNT` | CREATE_BANK_ACCOUNT | Tool to create a new bank account for print & mail service. |
| `POSTGRID_CREATE_CONTACT` | Create Contact | Tool to create a new contact in postgrid. use after collecting contact's name, address, and optional metadata. |
| `POSTGRID_CREATE_LETTER` | Create Letter | Tool to create and send a letter via postgrid. use when recipient, sender, and content details are ready. |
| `POSTGRID_CREATE_TEMPLATE` | Create Template | Tool to create a new mail template in postgrid. use when you need to define reusable html content with dynamic placeholders. use after confirming required template details. |
| `POSTGRID_CREATE_WEBHOOK` | Create Webhook | Tool to create a new webhook to receive order event notifications. use after configuring your endpoint to handle webhook payloads. |
| `POSTGRID_DELETE_BANK_ACCOUNT` | Delete Bank Account | Tool to delete a bank account by its id. use when you need to remove a bank account after confirming its identifier. |
| `POSTGRID_DELETE_CONTACT` | Delete Contact | Tool to delete a contact by its id. use when you need to remove obsolete contacts after confirming their identifier. |
| `POSTGRID_DELETE_TEMPLATE` | Delete Template | Tool to delete a template by its id. use when you need to remove an existing template after confirming its identifier. |
| `POSTGRID_DELETE_WEBHOOK` | Delete Webhook | Tool to delete a webhook subscription. use when you need to remove an existing webhook by its id. |
| `POSTGRID_GET_BANK_ACCOUNT` | Get Bank Account | Tool to retrieve a bank account. use after obtaining the bank account id to fetch its details. |
| `POSTGRID_GET_CONTACT` | Get Contact | Tool to retrieve a contact. use after obtaining the contact id to fetch its details. |
| `POSTGRID_GET_LETTER` | Get Letter | Tool to retrieve a letter. use after you have the letter id to fetch its details. |
| `POSTGRID_GET_TEMPLATE` | Get Template | Tool to retrieve a template. use when you have the template id and need its details. |
| `POSTGRID_GET_WEBHOOK` | Get Webhook | Tool to retrieve details of a specific webhook by its id. use after creating a webhook to fetch its configuration and status. |
| `POSTGRID_LIST_BANK_ACCOUNTS` | List Bank Accounts | Tool to list bank accounts. use when retrieving bank accounts with optional status filter and pagination. |
| `POSTGRID_LIST_CHEQUES` | List Cheques | Tool to list cheques with optional filters and pagination. use when you need to retrieve batches of cheque records for processing or reporting. |
| `POSTGRID_LIST_CONTACTS` | List Contacts | Tool to list contacts. use when you need to retrieve a paginated list of contacts with optional filters like date range, metadata, name, or email. |
| `POSTGRID_LIST_LETTERS` | List Letters | Tool to list letters. use when retrieving letters with optional filters and pagination. |
| `POSTGRID_LIST_POSTCARDS` | List Postcards | Tool to retrieve a list of postcards with optional filtering and pagination. use when you need to browse or filter postcards list. |
| `POSTGRID_LIST_SELF_MAILERS` | List Self-Mailers | Tool to list self-mailers. use when you need to fetch self-mailers with filters and pagination. |
| `POSTGRID_LIST_TEMPLATES` | List Templates | Tool to list templates. use when you need to retrieve a paginated list of templates with optional type filtering. |
| `POSTGRID_LIST_WEBHOOKS` | List Webhooks | Tool to retrieve a list of configured webhooks with optional filtering and pagination. use when you need to view your webhooks. |

## Supported Triggers

None listed.

## Creating MCP Server - Stand-alone vs Composio SDK

The Postgrid MCP server provides comprehensive access to Postgrid operations through Composio. Once connected, Hermes can perform all major Postgrid actions on your behalf using natural language commands.

## Complete Code

None listed.

## Conclusion

### Way Forward
With Postgrid connected, Hermes can now act on your behalf whenever it detects a relevant task or you ask it to.
From here, you can extend Hermes further:
- Connect more apps: Calendar, Slack, Notion, Linear, and hundreds of others are available through the same Composio Connect setup. Each new integration compounds what Hermes can do for you.
- Build workflows across tools: Once multiple apps are connected, Hermes can chain actions together — turn an email into a calendar invite, a Slack message into a Linear ticket, or a meeting note into a follow-up draft.
- Let it learn your patterns: The more you use Hermes, the better it gets at anticipating how you'd handle recurring tasks. Give it feedback on drafts and decisions, and it will adapt.
If you run into trouble or want to share what you've built, join the [community](https://discord.com/invite/composio) or check out the [Docs](https://docs.composio.dev?utm_source=toolkits&utm_medium=framework_template&utm_campaign=hermes&utm_content=docs) for deeper configuration options.

## How to build Postgrid MCP Agent with another framework

- [OpenAI Agents SDK](https://composio.dev/toolkits/postgrid/framework/open-ai-agents-sdk)
- [Claude Agent SDK](https://composio.dev/toolkits/postgrid/framework/claude-agents-sdk)
- [Claude Code](https://composio.dev/toolkits/postgrid/framework/claude-code)
- [Claude Cowork](https://composio.dev/toolkits/postgrid/framework/claude-cowork)
- [Codex](https://composio.dev/toolkits/postgrid/framework/codex)
- [OpenClaw](https://composio.dev/toolkits/postgrid/framework/openclaw)
- [CLI](https://composio.dev/toolkits/postgrid/framework/cli)
- [Google ADK](https://composio.dev/toolkits/postgrid/framework/google-adk)
- [LangChain](https://composio.dev/toolkits/postgrid/framework/langchain)
- [Vercel AI SDK](https://composio.dev/toolkits/postgrid/framework/ai-sdk)
- [Mastra AI](https://composio.dev/toolkits/postgrid/framework/mastra-ai)
- [LlamaIndex](https://composio.dev/toolkits/postgrid/framework/llama-index)
- [CrewAI](https://composio.dev/toolkits/postgrid/framework/crew-ai)

## Related Toolkits

- [Gmail](https://composio.dev/toolkits/gmail) - Gmail is Google's email service with powerful spam protection, search, and G Suite integration. It keeps your inbox organized and makes communication fast and reliable.
- [Google Calendar](https://composio.dev/toolkits/googlecalendar) - Google Calendar is a time management service for scheduling meetings, events, and reminders. It streamlines personal and team organization with integrated notifications and sharing options.
- [Google Drive](https://composio.dev/toolkits/googledrive) - Google Drive is a cloud storage platform for uploading, sharing, and collaborating on files. It's perfect for keeping your documents accessible and organized across devices.
- [Outlook](https://composio.dev/toolkits/outlook) - Outlook is Microsoft's email and calendaring platform for unified communications and scheduling. It helps users stay organized with powerful email, contacts, and calendar management.
- [Twitter](https://composio.dev/toolkits/twitter) - Twitter is a social media platform for sharing real-time updates, conversations, and news. Stay connected, informed, and engaged with communities worldwide.
- [Google Sheets](https://composio.dev/toolkits/googlesheets) - Google Sheets is a cloud-based spreadsheet tool for real-time collaboration and data analysis. It lets teams work together from anywhere, updating information instantly.
- [Supabase](https://composio.dev/toolkits/supabase) - Supabase is an open-source backend platform offering scalable Postgres databases, authentication, storage, and real-time APIs. It lets developers build modern apps without managing infrastructure.
- [Composio](https://composio.dev/toolkits/composio) - Composio is an integration platform that connects AI agents with hundreds of business tools. It streamlines authentication and lets you trigger actions across services—no custom code needed.
- [Notion](https://composio.dev/toolkits/notion) - Notion is a collaborative workspace for notes, docs, wikis, and tasks. It streamlines team knowledge, project tracking, and workflow customization in one place.
- [Slack](https://composio.dev/toolkits/slack) - Slack is a channel-based messaging platform for teams and organizations. It helps people collaborate in real time, share files, and connect all their tools in one place.
- [Airtable](https://composio.dev/toolkits/airtable) - Airtable combines the flexibility of spreadsheets with the power of a database for easy project and data management. Teams use Airtable to organize, track, and collaborate with custom views and automations.
- [Google Docs](https://composio.dev/toolkits/googledocs) - Google Docs is a cloud-based word processor that enables document creation and real-time collaboration. Its seamless sharing and version history make team editing and content management a breeze.
- [Google Super](https://composio.dev/toolkits/googlesuper) - Google Super is an all-in-one suite combining Gmail, Drive, Calendar, Sheets, Analytics, and more. It gives you a unified platform to manage your digital life, boosting productivity and organization.
- [Hubspot](https://composio.dev/toolkits/hubspot) - HubSpot is an all-in-one marketing, sales, and customer service platform. It lets teams nurture leads, automate outreach, and track every customer interaction in one place.
- [Codeinterpreter](https://composio.dev/toolkits/codeinterpreter) - Codeinterpreter is a Python-based coding environment with built-in data analysis and visualization. It lets you instantly run scripts, plot results, and prototype solutions inside supported platforms.
- [Gong](https://composio.dev/toolkits/gong) - Gong is a platform for video meetings, call recording, and team collaboration. It helps teams capture conversations, analyze calls, and turn insights into action.
- [Asana](https://composio.dev/toolkits/asana) - Asana is a collaborative work management platform for teams to organize and track projects. It streamlines teamwork, boosts productivity, and keeps everyone aligned on goals.
- [Ashby](https://composio.dev/toolkits/ashby) - Ashby is an applicant tracking system that handles job postings, candidate management, and hiring analytics.
- [Pipedrive](https://composio.dev/toolkits/pipedrive) - Pipedrive is a sales management platform offering pipeline visualization, lead tracking, and workflow automation. It helps sales teams keep deals moving forward efficiently and never miss a follow-up.
- [Google Tasks](https://composio.dev/toolkits/googletasks) - Google Tasks is a to-do list and task management tool integrated into Gmail and Google Calendar. It helps you organize, track, and complete tasks across your Google ecosystem.

## Frequently Asked Questions

### What are the differences in Tool Router MCP and Postgrid MCP?

With a standalone Postgrid MCP server, the agents and LLMs can only access a fixed set of Postgrid tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Postgrid and many other apps based on the task at hand, all through a single MCP endpoint.

### Can I use Tool Router MCP with Hermes?

Yes, you can. Hermes fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Postgrid tools.

### Can I manage the permissions and scopes for Postgrid while using Tool Router?

Yes, absolutely. You can configure which Postgrid scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

### How safe is my data with Composio Tool Router?

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Postgrid data and credentials are handled as safely as possible.

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