# How to integrate mailfloss MCP with Hermes

```json
{
  "title": "How to integrate mailfloss MCP with Hermes",
  "toolkit": "mailfloss",
  "toolkit_slug": "mailfloss",
  "framework": "Hermes",
  "framework_slug": "hermes-agent",
  "url": "https://composio.dev/toolkits/mailfloss/framework/hermes-agent",
  "markdown_url": "https://composio.dev/toolkits/mailfloss/framework/hermes-agent.md",
  "updated_at": "2026-10-24T05:33:40.713Z"
}
```

## 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 mailfloss 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 mailfloss with

- [ChatGPT](https://composio.dev/toolkits/mailfloss/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/mailfloss/framework/claude-cowork)
- [Atomic Agent](https://composio.dev/toolkits/mailfloss/framework/atomic-agent)

## TL;DR

### What is Composio Connect?
Composio Connect is a consumer offering that lets anyone plug 1,500+ 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 mailfloss to Hermes

### Integrating mailfloss 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 mailfloss MCP server, and what's possible with it?

The mailfloss MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your mailfloss account. It provides structured and secure access to email verification, batch processing, account details, and usage information, so your agent can verify email addresses, process verification batches, track job status and results, and manage stored verification records on your behalf.
- Individual email verification: Have your agent check an email address and return its Mailfloss verification verdict.
- Batch verification workflows: Direct your agent to submit groups of email addresses for verification, monitor processing status, retrieve results, or cancel pending jobs.
- Verification history: Let the agent review past verification jobs, inspect their verdict breakdowns, and filter job history by source or lifecycle status.
- Account and usage insights: Instruct your agent to check the connected API key, view account and organization details, and review verification usage for a selected period.
- Record management: Have your agent permanently erase stored verification records for specified email addresses when they are no longer needed.

## Supported Tools

| Tool slug | Name | Description |
|---|---|---|
| `MAILFLOSS_CANCEL_BATCH_VERIFICATION` | Cancel Batch Verification | Cancel a pending or in-progress batch verification job. This irreversible operation stops remaining work and re-credits unprocessed emails; it is a no-op if the job has already completed. Composio generates an idempotency key when omitted and preserves it for retries within this execution. Reuse a caller-supplied key for the same cancellation across separate calls. |
| `MAILFLOSS_CHECK_API_KEY` | Check API Key | Verify that the connected Mailfloss API key is valid. Uses the connection's Bearer credential and does not accept credentials, request widget tokens, or return signed-proof fields. |
| `MAILFLOSS_CREATE_BATCH_VERIFICATION` | Create Batch Verification | Submit email addresses for asynchronous batch verification and return the job ID. Optionally request a completion webhook instead of polling. This billable action can fail with 402 insufficient_credits. Composio generates an idempotency key when none is supplied, so internal retries reuse the same key and email list. Separate action calls replay the cached response only when the caller reuses that key with identical emails; changing the list fails with 422, while a concurrent same-key request can fail with 409. |
| `MAILFLOSS_ERASE_VERIFICATION_RECORDS` | Erase Verification Records | Permanently erase stored verification records for the supplied email addresses. This destructive data-privacy operation is irreversible; erased records cannot be recovered. Addresses with no stored records are a successful no-op. The body contains only the documented emails array. Composio generates an idempotency key when omitted and preserves it for retries within this execution. |
| `MAILFLOSS_GET_ACCOUNT` | Get Account | Return the authenticated Mailfloss account holder's identity, contact details, security posture, notification preferences, and signup time. This read does not expose API credentials or two-factor secrets. |
| `MAILFLOSS_GET_BATCH_VERIFICATION_RESULTS` | Get Batch Verification Results | Return one cursor-controlled page of stored batch results after organization floss-setting overrides. These statuses and reasons can differ from Verify Email's raw verdict for the same address; fetching stored results is not documented as consuming verification credits. |
| `MAILFLOSS_GET_BATCH_VERIFICATION_STATUS` | Get Batch Verification Status | Read an asynchronous batch verification job's state and available counters. Polling is not documented as consuming verification credits; authentication, policy, not-found, rate-limit, and server responses remain errors rather than job states. |
| `MAILFLOSS_GET_JOB` | Get Verification Job | Return one verification job and its complete verdict breakdown. Results are null until completion and include all per-reason counters when present. |
| `MAILFLOSS_GET_ORGANIZATION` | Get Organization | Return the authenticated Mailfloss organization's plan, credit balances, current-period usage, trial state, account status, and feature entitlements. This is a read-only view and does not expose API or billing credentials. |
| `MAILFLOSS_GET_USAGE_REPORT` | Get Usage Report | Return verification usage for a UTC calendar period, optionally scoped to one ESP connection. Lifetime reports contain only the authoritative total; their range, status counts, and reason counts are null. |
| `MAILFLOSS_LIST_JOBS` | List Verification Jobs | Return one page of the organization's verification-job history, newest first, with optional source and lifecycle filters. Completed jobs include verdict totals; use Get Job for the full per-reason breakdown. |
| `MAILFLOSS_VERIFY_EMAIL` | Verify Email | Verify one email address and return Mailfloss's raw engine verdict without organization floss-setting overrides. passed means safe to send, undeliverable is a hard failure, risky covers role, disposable, bounced, or complained addresses, and unknown includes accept-all addresses and transient SMTP failures. relay and gibberish are annotations and do not alter the verdict. Each successful call consumes one verification credit; a depleted balance fails with 402 insufficient_credits, so do not retry billable failures blindly. |

## Supported Triggers

None listed.

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

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

## Complete Code

None listed.

## Conclusion

### Way Forward
With mailfloss 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 mailfloss MCP Agent with another framework

- [ChatGPT](https://composio.dev/toolkits/mailfloss/framework/chatgpt)
- [Claude Cowork](https://composio.dev/toolkits/mailfloss/framework/claude-cowork)
- [Atomic Agent](https://composio.dev/toolkits/mailfloss/framework/atomic-agent)

## Related Toolkits

- [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.
- [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.
- [GitHub](https://composio.dev/toolkits/github) - GitHub is a code hosting platform for version control and collaborative software development. It streamlines project management, code review, and team workflows in one place.
- [1password](https://composio.dev/toolkits/_1password) - 1Password is a password manager and digital vault for storing logins, secrets, notes, and secure documents. It helps individuals and teams protect credentials, share access safely, and reduce password risk.
- [Ably](https://composio.dev/toolkits/ably) - Ably is a real-time messaging platform for live chat and data sync in modern apps. It offers global scale and rock-solid reliability for seamless, instant experiences.
- [Abuselpdb](https://composio.dev/toolkits/abuselpdb) - Abuselpdb is a central database for reporting and checking IPs linked to malicious online activity. Use it to quickly identify and report suspicious or abusive IP addresses.
- [Alchemy](https://composio.dev/toolkits/alchemy) - Alchemy is a blockchain development platform offering APIs and tools for Ethereum apps. It simplifies building and scaling Web3 projects with robust infrastructure.
- [Algolia](https://composio.dev/toolkits/algolia) - Algolia is a hosted search API that powers lightning-fast, relevant search experiences for web and mobile apps. It helps developers deliver instant, typo-tolerant, and scalable search without complex infrastructure.
- [Anakin](https://composio.dev/toolkits/anakin_io) - Anakin is a web automation platform offering scraping, crawling, search, and browser automation. Use it to extract structured data, automate site tasks, and monitor web changes reliably.
- [Anchor browser](https://composio.dev/toolkits/anchor_browser) - Anchor browser is a developer platform for AI-powered web automation. It transforms complex browser actions into easy API endpoints for streamlined web interaction.
- [Apiflash](https://composio.dev/toolkits/apiflash) - Apiflash is a website screenshot API for programmatically capturing web pages. It delivers high-quality screenshots on demand for automation, monitoring, or reporting.
- [Apiverve](https://composio.dev/toolkits/apiverve) - Apiverve delivers a suite of powerful APIs that simplify integration for developers. It's designed for reliability and scalability so you can build faster, smarter applications without the integration headache.
- [Appcircle](https://composio.dev/toolkits/appcircle) - Appcircle is an enterprise-grade mobile CI/CD platform for building, testing, and publishing mobile apps. It streamlines mobile DevOps so teams ship faster and with more confidence.
- [Appdrag](https://composio.dev/toolkits/appdrag) - Appdrag is a cloud platform for building websites, APIs, and databases with drag-and-drop tools and code editing. It accelerates development and iteration by combining hosting, database management, and low-code features in one place.
- [Appveyor](https://composio.dev/toolkits/appveyor) - AppVeyor is a cloud-based continuous integration service for building, testing, and deploying applications. It helps developers automate and streamline their software delivery pipelines.
- [Authyo](https://composio.dev/toolkits/authyo) - Authyo is a REST API service for passwordless authentication, OTP verification, session management, and transactional notifications. Use it to add secure login flows and user verification without building auth infrastructure from scratch.
- [AWS Marketplace MCP](https://composio.dev/toolkits/aws_marketplace_mcp) - AWS Marketplace MCP provides MCP access to AWS Marketplace's cloud software, data, and services catalog. Use it to discover, compare, and evaluate 30K+ AWS Marketplace listings faster.
- [Azure Monitor Activity Log](https://composio.dev/toolkits/azure_monitor_activity_log) - Azure Monitor Activity Log is Azure's service that records management and control-plane events for a subscription. Use it to audit changes, troubleshoot issues, and track resource operations across your Azure resources.
- [Backendless](https://composio.dev/toolkits/backendless) - Backendless is a backend-as-a-service platform for mobile and web apps, offering database, file storage, user authentication, and APIs. It helps developers ship scalable applications faster without managing server infrastructure.
- [Baserow](https://composio.dev/toolkits/baserow) - Baserow is an open-source no-code database platform for building collaborative data apps. It makes it easy for teams to organize data and automate workflows without writing code.

## Frequently Asked Questions

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

With a standalone mailfloss MCP server, the agents and LLMs can only access a fixed set of mailfloss tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from mailfloss 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 mailfloss tools.

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

Yes, absolutely. You can configure which mailfloss 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 mailfloss data and credentials are handled as safely as possible.

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