AI agents

mercury-agent

An always-on assistant built to ask before it acts

Visit official page 日本語で詳しく見る

Popularity

★ 3.0k

Last update

August 2026

License / pricing

MIT

What it does

Runs continuously and reachable from CLI, Telegram or a web UI, with 31 built-in tools, Kanban boards and SQLite-backed long-term memory — but the design emphasis is restraint: permission-hardened tools, confirmation before acting, and explicit token budgets. Install is a one-line script (set it from the official page, not a copy). Always-on means always billing, so configure the budget ceiling on day one, and remember a connected messaging account grants the agent whatever that account can do. MIT.

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

Screenshots & visuals

Before you start

Setup difficultySome setup needed
Command lineRequired
API keyRequired
Sends data onlineYes

Judged automatically from the project's own metadata. Always confirm on the official page.

mercury-agent FAQ

Is mercury-agent free?: mercury-agent itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.
Do I need to install anything or write code to use mercury-agent?: It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.
Does mercury-agent work on a phone?: No. It needs a computer.
Can I use mercury-agent commercially?: The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.

How it compares

The conditions that decide whether you can actually use it, side by side.

Tool	Command line	API key	Sends data out	Phone	Commercial use
mercury-agent (this page)	Required	Required	Yes	No	Yes
spacebot	Required	Not needed	Yes	No	With conditions
clawe	Required	Required	Yes	No	Yes
agent-teams-ai	Not needed	Not needed	Yes	No	Yes

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.

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What it does

Summary based on the project's own description. The Japanese page has a fuller beginner guide: setup difficulty, what to prepare, and a step-by-step start.

mercury-agent FAQ

Is mercury-agent free?

mercury-agent itself is free, but it needs an API key for an external AI service. That service charges separately, though some have a free tier.

Do I need to install anything or write code to use mercury-agent?

It needs the command line. If you are not comfortable typing commands, expect to get stuck during setup.

Does mercury-agent work on a phone?

No. It needs a computer.

Can I use mercury-agent commercially?

The licence is MIT, which permits commercial use. Conditions such as keeping the copyright notice still apply, so read the licence text before shipping it inside something.

How it compares

The conditions that decide whether you can actually use it, side by side.

Tool	Command line	API key	Sends data out	Phone	Commercial use
mercury-agent (this page)	Required	Required	Yes	No	Yes
spacebot	Required	Not needed	Yes	No	With conditions
clawe	Required	Required	Yes	No	Yes
agent-teams-ai	Not needed	Not needed	Yes	No	Yes

"Sends data out" means your input is uploaded to someone's server. Pick "No" when the material cannot leave your organisation.