Openhermit

OpenHermit

Agents, but operable.

Open-source platform for deploying fleets of AI agents as production services — durable state, sandboxed execution, managed at scale, and the channels you already use.

Built by Amiko — an agent-agnostic infrastructure platform for the AI era.

[](https://www.npmjs.com/package/openhermit) [](LICENSE) [](https://github.com/HCF-S/openhermit/stargazers) [](https://www.typescriptlang.org/) [](#contributing)

Website · Why OpenHermit · [Docs](docs/) · npm

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Why OpenHermit

Most CLI-based agents (Claude Code, OpenClaw, Hermes, …) keep their state in files: memories as markdown, sessions as JSONL, skills as folders, secrets as dotfiles. That's perfect for one human at one machine — but it falls apart the moment you stop being one human. Running an internal agent platform for your team, a SaaS where every customer gets their own agent, or a swarm of specialized roles? Files scatter, secrets leak, fleet operations turn into SSH-and-pray.

OpenHermit makes one core design choice: separate internal state from external state.

• Internal state — sessions, memories, instructions, skills, MCP servers, schedules, secrets, users — lives in shared PostgreSQL, scoped by agent_id.
• External state — the workspace files an agent is currently working on — lives in a per-agent sandbox. Pick the backend that fits your deployment: a self-hosted Docker container, or a cloud sandbox provider like E2B or Daytona.

Once internal state is centralized, fleet operations become trivial:

hermit skills enable standup-digest --all                       # roll a skill out to every agent
hermit mcp enable mcp_github --all                              # add an MCP server to every agent
hermit instructions append rules "Never share PII." --all       # push a rule to every agent
hermit config secrets set OPENROUTER_API_KEY sk-... --agent main  # rotate a secret

📖 Read the full reasoning →

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Features

• 🚪 Gateway control plane — single Hono server. Agents start, attach, detach without orchestration. Admin UI at /admin/.
• 🐘 Postgres-backed state — sessions, memories, instructions, skills, MCP, schedules, secrets — durable behind Drizzle.
• 🐳 Sandboxed execution — per-agent sandbox: self-hosted Docker, E2B, or Daytona. Code runs isolated from the gateway, with the same exec interface across backends.
• 💬 Channels included — Telegram, Discord, Slack adapters, package-installed Signal / WeChat / WhatsApp, plus CLI and Web UI. Enable, disable, reconfigure at runtime.
• 🛠 Skills & MCP servers — install centrally, enable per-agent or fleet-wide, audit from one place.
• ⏱ Schedules & automation — cron and one-shot jobs with timeout, concurrency policy, and error backoff.
• 👥 Multi-user with roles — owner / user / guest. Identity reconciliation across CLI, web, and channels.
• 🔌 Multi-protocol transport — HTTP sync, inline SSE streaming, durable SSE, WebSocket RPC.

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Architecture

• Admin — CLI + Web UI for deploying and operating agents.
• Client — Web and CLI for end-users to chat with agents.
• Channels — Telegram, Discord, Slack, and package-installed adapters such as Signal, WeChat, and WhatsApp wired into any agent.
• Gateway — API, auth, routing, agent lifecycle, schedules.
• Agent — Model loop, tools / skills / MCP, sandboxed workspace (Docker / E2B / Daytona).
• Storage — PostgreSQL for every kind of internal state.

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Installation

npm install -g openhermit

This installs both hermit and openhermit.

For local development:

git clone https://github.com/HCF-S/openhermit.git
cd openhermit
npm install

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Quick Start

# Configure DATABASE_URL, GATEWAY_ADMIN_TOKEN, GATEWAY_JWT_SECRET.
hermit setup

# Start the gateway and the end-user web app.
hermit gateway start
hermit web start

# Check platform health.
hermit status
hermit doctor

# Create and start an agent.
hermit agents create main
hermit agents start main

# Chat through the CLI.
hermit chat --agent main

The gateway defaults to http://127.0.0.1:4000 and serves the admin UI at /admin/. The end-user web app runs on http://127.0.0.1:4310.

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CLI Reference

| Area | Commands | |------|----------| | Setup | hermit setup | | Gateway | hermit gateway start, stop, run, status | | Web | hermit web start, stop, run, status | | Agents | hermit agents list, create, start, stop, restart, delete | | Chat | hermit chat, --agent , --resume, --session | | Config | hermit config show, get, set | | Secrets | hermit config secrets list, set, remove | | Instructions | hermit instructions list, get, set, append, remove — single-agent (--agent ) or admin fan-out (--all) | | Skills | hermit skills list, assignments, scan, register, delete, enable, disable | | MCP | hermit mcp list, assignments, enable, disable | | Schedules | hermit schedules list, create, pause, resume, delete, runs | | Operations | hermit status, hermit stats, hermit doctor, hermit logs [-f] [-n N] |

Agent-scoped commands accept --agent and default to OPENHERMIT_AGENT_ID or main. Full reference: [docs/cli.md](docs/cli.md).

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API Overview

Agent execution routes are exposed under /api/agents/{agentId}:

• POST /api/agents/{id}/sessions
• GET /api/agents/{id}/sessions
• POST /api/agents/{id}/sessions/{sessionId}/messages
• POST /api/agents/{id}/sessions/{sessionId}/messages?wait=true
• POST /api/agents/{id}/sessions/{sessionId}/messages?stream=true
• GET /api/agents/{id}/sessions/{sessionId}/events
• POST /api/agents/{id}/sessions/{sessionId}/approve
• POST /api/agents/{id}/sessions/{sessionId}/checkpoint
• DELETE /api/agents/{id}/sessions/{sessionId}
• ws://host/api/agents/{id}/ws

Admin and owner-facing management endpoints live under /api/admin/... and /api/agents/{agentId}/.... Channel webhooks land at POST /api/agents/{id}/channels/{namespace}/webhook.

See [docs/transport-protocol.md](docs/transport-protocol.md), [docs/skills.md](docs/skills.md), [docs/mcp-servers.md](docs/mcp-servers.md), and [docs/channel-adapter.md](docs/channel-adapter.md).

---

Internal State

All durable internal state is scoped by agent_id where applicable:

| Store | Contents | |-------|----------| | Agents | Registered agents, runtime config, security policy, workspace dirs | | Sessions | Metadata, status, participants, working memory, descriptions | | Session events | User, assistant, tool, error, channel, and introspection events | | Memories | Long-term memory with PostgreSQL FTS plus ILIKE fallback | | Instructions | Agent identity, behavior, and rules included in prompts | | Users | Users, identities, roles, and merge links | | Sandboxes | Per-agent sandbox rows (docker / e2b / daytona) with lifecycle and runtime state | | Skills | Skill library and per-agent/global assignments | | MCP servers | External MCP server definitions and assignments | | Channels | Built-in and external channel rows with encrypted tokens | | Channel credentials | Encrypted channel-owned auth state such as WhatsApp Web / Baileys credentials | | Secrets | Per-agent provider/integration secrets, encrypted at rest | | Schedules | Cron/once jobs and run history |

Secrets and channel-owned credentials are encrypted with OPENHERMIT_SECRETS_KEY (AES-256-GCM); without that key the gateway falls back to per-agent secrets.json for local dev secrets, but DB-backed channel credentials are unavailable. The only per-agent files on disk are the workspace at ~/.openhermit/workspaces/{agentId}/; enabled skills are synced into each backend's own /.openhermit/skills/system/ (bind-mounted for docker, uploaded via SDK for e2b/daytona).

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Repository Structure

openhermit/
├── apps/
│   ├── agent/                # AgentRunner, tools, runtime, scheduler, channels
│   ├── gateway/              # Control plane, auth, admin API, admin UI
│   ├── cli/                  # Published `hermit` / `openhermit` CLI
│   ├── web/                  # End-user browser chat app
│   └── channels/
│       ├── telegram/         # Telegram adapter
│       ├── discord/          # Discord adapter
│       └── slack/            # Slack adapter
├── packages/
│   ├── protocol/             # Shared protocol types and route builders
│   ├── sdk/                  # HTTP/SSE/WebSocket clients
│   ├── shared/               # Common env, errors, URL helpers
│   └── store/                # Drizzle schema and PostgreSQL store implementations
├── skills/                   # Built-in OpenHermit skills registered by the gateway
└── docs/                     # Architecture and operation docs

---

Development

npm run dev:gateway          # Gateway and admin UI API at http://127.0.0.1:4000
npm run dev:web              # End-user web app at http://127.0.0.1:4310
npm run dev:cli              # CLI from source
npm run dev:studio           # Drizzle Studio for the configured database
npm run typecheck            # Type-check all workspaces
npm test                     # Build and run test suites

Important environment variables:

| Variable | Description | |----------|-------------| | DATABASE_URL | PostgreSQL connection string | | DATABASE_URL_TEST | Test PostgreSQL connection string used by npm test | | GATEWAY_ADMIN_TOKEN | Bearer token for admin APIs and CLI management | | GATEWAY_JWT_SECRET | JWT signing secret for user/device tokens | | GATEWAY_HOST | Gateway listen host, default 127.0.0.1 | | GATEWAY_PORT / PORT | Gateway port, default 4000 | | OPENHERMIT_SECRETS_KEY | AES-256-GCM key used to encrypt agent_secrets and channel tokens at rest | | OPENHERMIT_TOKEN | CLI token, usually the admin token | | OPENHERMIT_GATEWAY_URL | Gateway URL, default http://127.0.0.1:4000 | | OPENHERMIT_AGENT_ID | Default CLI agent ID, default main | | OPENHERMIT_WEB_PORT | End-user web app port, default 4310 | | AWS_ACCESS_KEY_ID / AWS_SECRET_ACCESS_KEY / AWS_REGION | Standard AWS credential chain — used when attachments.storage.provider = s3 | | SUPABASE_URL | Supabase project URL (e.g. https://xyz.supabase.co) — required when attachments.storage.provider = supabase. Treated as part of the credential bundle since it embeds the project ID | | SUPABASE_SERVICE_ROLE_KEY | Required when attachments.storage.provider = supabase. Never stored in gateway config |

Attachment storage backends

The gateway supports three storage providers. The provider is selected in the gateway config (DB-backed, edited via the admin UI at /admin/config — JSON tab — or seeded from gateway.json on first boot), and credentials live in env, not config — only secrets go in env; non-secret pointers (provider, bucket, region, prefix, endpoint, root) live in the gateway config.

Local disk (default)

No config block needed; defaults to ~/.openhermit/attachments. To override the root, set this under attachments.storage:

{
  "attachments": { "storage": { "provider": "local", "root": "/srv/openhermit/attachments" } }
}

S3 (or any S3-compatible service: R2, MinIO, B2)

Install the SDK on the gateway: npm install @aws-sdk/client-s3 @aws-sdk/s3-request-presigner. Credentials come from the AWS default chain (env vars / IAM role / IRSA).

{
  "attachments": {
    "storage": {
      "provider": "s3",
      "bucket": "oh-attachments",
      "region": "us-east-1",
      "prefix": "prod",
      "endpoint": "https://abc.r2.cloudflarestorage.com",
      "forcePathStyle": false
    }
  }
}

Supabase Storage

Install the SDK on the gateway: npm install @supabase/supabase-js. Set SUPABASE_URL and SUPABASE_SERVICE_ROLE_KEY in env — the project URL embeds the project ID and is treated as part of the credential bundle.

{
  "attachments": {
    "storage": {
      "provider": "supabase",
      "bucket": "attachments",
      "prefix": "agents"
    }
  }
}

Optional attachments.limits.maxBytes overrides the default 25 MB cap. Every successful upload is materialized into the sandbox; if the sandbox is down the row is marked failed and attachment_fetch re-materializes on first read.

---

Documentation

• [CLI Reference](docs/cli.md)
• [Architecture](docs/architecture.md)
• [Plugins & Hooks (design draft)](docs/plugins.md)
• [Storage Model](docs/storage-model.md)
• [Session Model](docs/session-model.md)
• [User Model](docs/user-model.md)
• [Memory Model](docs/memory-model.md)
• [Sandbox Model](docs/sandbox-model.md)
• [Transport Protocol](docs/transport-protocol.md)
• [Access Policy](docs/access-policy.md)
• [Tools](docs/tools.md)
• [Skills](docs/skills.md)
• [MCP Servers](docs/mcp-servers.md)
• [Channel Adapters](docs/channel-adapter.md)
• [Introspection Design](docs/introspection-design.md)
• [Architecture Decisions](docs/decisions.md)
• [Shipped Features](docs/plan.md)
• [Roadmap](docs/roadmap.md)
• [Open Questions](docs/pending-decisions.md)

---

About Amiko

OpenHermit is the open-source agent infrastructure layer of Amiko — an agent-agnostic platform that integrates identity, productivity, social, and economic infrastructure into one coherent system where humans and AI agents coexist.

Amiko is organized around four connected layers:

• Identity — persistent, evolving user representation that powers personalization across all agents
• Productivity — agent capability integration across tools, services, and environments
• Social — 24/7 social continuity through AI twins, personality-driven matching, and agent-curated feeds
• Economy — native wallet infrastructure, token utility, and agent-mediated value exchange

OpenHermit provides the production runtime that makes this possible: durable state, sandboxed execution, multi-channel delivery, fleet management, and the access policy system that governs how agents act on behalf of users.

Amiko is agent-agnostic by design — bring your own agent or create one on the platform. Both paths lead to the same social graph, the same identity layer, and the same economic rails.

Learn more at heyamiko.com.

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Contributing

OpenHermit is open source (MIT) and very much a work in progress. If the internal/external state split, the fleet operations model, or agents-as-services resonates with you — we'd love your help.

Issues, PRs, design discussions, channel adapters, skills, MCP integrations, docs, and war stories from running it in your own setup are all welcome.

• Open an issue: github.com/HCF-S/openhermit/issues
• Start a discussion: github.com/HCF-S/openhermit/discussions
• Or just star the repo if you'd like to see where this goes

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License

MIT © Amiko

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: HCF-STUDIOS
• Source: HCF-STUDIOS/openhermit
• License: MIT
• Homepage: https://openhermit.ai

Install and usage instructions live in the source repository linked above.