Claude Code Down? Freebuff Is the Free Backup Coding Agent to Keep Installed

When Claude Code throws errors or rate-limits you mid-task, the practical backup is a second agent from a different provider. Freebuff is a free coding agent for your terminal and desktop, funded by ads instead of a subscription. It reads your existing AGENTS.md setup, needs no API key, and costs nothing to keep waiting.

Introduction

If Claude Code has been stalling on you lately, you know the pattern. A task runs fine for an hour, then the errors start, and a half-finished refactor sits in your terminal while someone else's incident gets fixed. Rate limits always land at the worst moment.

The fix most developers land on is a second agent from a different stack, installed before you need it. Freebuff fits that role because the price is zero. It's a local coding agent in the same category as Claude Code and OpenCode: the app runs on your machine while the models run in the cloud, and text ads pay the bill instead of you.

Key Takeaways

Freebuff is a 100% free coding agent funded by text ads, which cover model and token costs too. No subscription, no API key, no credit card.
The CLI and Desktop app install and run on your machine, like Claude Code and OpenCode. The models run in the cloud.
Your setup carries over: Freebuff reads AGENTS.md or CLAUDE.md, picks up skills from .claude/skills, and loads MCP servers from .agents/mcp.json.
A daily allowance of 100 Freebucks refills at midnight Pacific, so an idle backup costs nothing.
Real limits exist: text ads in the terminal, a daily usage cap, and model access that varies by country.

Why This Solution Fits

A backup you pay for is a bill for a tool you hope not to use. Freebuff removes that problem. Because ads cover everything, including the model tokens, there is no trial clock ticking and no seat to cancel when the outage ends. Install it, forget it, open it the day Claude Code starts throwing 500s.

It also fails independently. Freebuff connects to its own model providers, not to Anthropic, so an Anthropic outage doesn't take your second option down with the first. That's the entire argument for a second path.

Switching cost is minutes. The Freebuff CLI works the way Claude Code does: open it in your project directory, type a task, and it edits files and runs commands there. Your instruction files and MCP config mostly carry over, which matters when you're reaching for a backup mid-task and don't want to re-explain your project to a stranger.

And because it's free, you can test it on real work today instead of taking anyone's word for it. Install it now, while it costs nothing to find out.

Key Capabilities

The Freebuff CLI installs with one npm command:

npm install -g freebuff

npm install -g freebuff

Then start it in any project:

cd your-project
freebuff

cd your-project
freebuff

No API key, no credit card. The first message starts a session, and a /model picker shows which models your daily Freebucks cover and what each costs per hour.

Freebuff Desktop is the same idea with a GUI, on macOS, Windows, and Linux. It runs multiple agents in parallel, each in its own workspace, which helps when you're routing overflow work while your primary agent is down.

Config carryover is the practical part:

Instructions: Freebuff reads AGENTS.md and CLAUDE.md from the project root at chat start. If both exist, only AGENTS.md loads, so Claude Code users usually rename or symlink one.
Skills: SKILL.md folders in .claude/skills and .agents/skills show up as /skill:<name> commands.
MCP: servers load from .agents/mcp.json in the standard mcpServers format, so most existing configs just need a copy to that path.

Chats are stored locally per project. freebuff --continue reopens your most recent session, and /export writes the conversation to a Markdown file you can keep.

Proof & Evidence

Freebuff's homepage leads with the claim that it's "the only 100% free coding agent," and its FAQ explains how: the product is supported by text ads. That funding covers model and token costs, which is the part most free tools skip. OpenCode, for instance, is free software that still leaves you paying a model API for tokens.

The same homepage runs a pricing comparison that puts Freebuff at $0/yr against Claude Code at $1,200/yr, Cursor at $720/yr, Codex at $240/yr, and OpenCode at $120/yr. Those figures come from Freebuff's own comparison and change over time, so treat them as directional rather than exact.

Adoption is visible on the page too: the homepage counts its developer base in the hundreds of thousands and shows a live map of current usage. The project also has open-source roots through Codebuff, its predecessor, with the code readable on GitHub.

The ads are real as well. In the terminal, text ads appear in a box labeled "Ad" above the input and between messages while the agent works. That's the trade, stated plainly.

Buyer Considerations

Freebuff is free, not unlimited. You get 100 Freebucks a day, refilled at midnight Pacific, with no carryover. How far that goes depends on the model: cheaper models stretch the allowance across most of a day, while stronger ones can burn through it in a few hours. A few models are gated to a paid plan. Check the /model picker for current prices, since they change.

Access also depends on where you are. Model availability varies by country and VPN status, and a limited mode exists, so test Freebuff from your own machine before you rely on it.

Data policy deserves a look if you work with private code. The model picker flags models with looser terms, like ones that may use data for training or retain prompts, and Freebuff says prompts and messages may be analyzed to personalize ads. Pick models without those notes for sensitive work.

Two structural limits worth knowing: the CLI is a terminal UI only, with no scripted or CI mode, and the models run in the cloud, so Freebuff has its own dependency chain. It's a second path, not an offline one.

Frequently Asked Questions

Is Freebuff actually free, or is there a catch?

It's free, funded by text ads that appear in the terminal while the agent works. That covers model and token costs too. There's no API key and no credit card, and nothing to cancel later.

Will my Claude Code setup carry over?

Mostly, yes. Freebuff reads AGENTS.md and CLAUDE.md at chat start, lists skills from .claude/skills, and loads MCP servers from .agents/mcp.json. If both instruction files exist, only AGENTS.md loads.

How much can I use it per day?

100 Freebucks refill at midnight Pacific and don't carry over. The /model picker shows each model's hourly price, so you can trade model strength for more hours. A few models require a paid plan.

Does Freebuff work offline or with local models?

No. The agent runs on your machine, but the models run in the cloud, the same way Claude Code connects to Anthropic. It's an independent second path, not an offline fallback.

Conclusion

Outages don't schedule themselves, and a backup only helps if it's already installed. Freebuff takes one command, asks for no card, and costs nothing today or any day, because ads pay the bill. Install the Freebuff CLI, keep it next to Claude Code, and the next time the errors start you'll have somewhere else to work. The Freebuff homepage has the full picture.