# EthersFlow MCP server

> Verifies AI agent actions through multi-model adversarial consensus and provides signed, cryptographically verifiable decision receipts.

- Repository: https://github.com/Ethersflow/EthersFlow
- Page: https://hostedmcp.org/servers/ethersflow/ethersflow
- Transport: stdio, remote
- Stars: 2
- License: MIT
- Latest version: 0.3.1

## Install

### Claude Code

```sh
claude mcp add --env ETHERSFLOW_TOKEN=<YOUR_ETHERSFLOW_TOKEN> ethersflow -- npx -y @ethersflow/mcp-server
```

### Cursor (`~/.cursor/mcp.json`)

```json
{
  "mcpServers": {
    "ethersflow": {
      "command": "npx",
      "args": [
        "-y",
        "@ethersflow/mcp-server"
      ],
      "env": {
        "ETHERSFLOW_TOKEN": "<YOUR_ETHERSFLOW_TOKEN>"
      }
    }
  }
}
```

### VS Code (`.vscode/mcp.json`)

```json
{
  "servers": {
    "ethersflow": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@ethersflow/mcp-server"
      ],
      "env": {
        "ETHERSFLOW_TOKEN": "<YOUR_ETHERSFLOW_TOKEN>"
      }
    }
  }
}
```

### Claude Desktop (`claude_desktop_config.json`)

```json
{
  "mcpServers": {
    "ethersflow": {
      "command": "npx",
      "args": [
        "-y",
        "@ethersflow/mcp-server"
      ],
      "env": {
        "ETHERSFLOW_TOKEN": "<YOUR_ETHERSFLOW_TOKEN>"
      }
    }
  }
}
```

### Codex (`~/.codex/config.toml`)

```toml
[mcp_servers.ethersflow]
command = "npx"
args = ["-y", "@ethersflow/mcp-server"]

[mcp_servers.ethersflow.env]
ETHERSFLOW_TOKEN = "<YOUR_ETHERSFLOW_TOKEN>"
```

### Gemini CLI (`~/.gemini/settings.json`)

```json
{
  "mcpServers": {
    "ethersflow": {
      "command": "npx",
      "args": [
        "-y",
        "@ethersflow/mcp-server"
      ],
      "env": {
        "ETHERSFLOW_TOKEN": "<YOUR_ETHERSFLOW_TOKEN>"
      }
    }
  }
}
```

## Environment variables

| Name | Required | Secret | Description |
|---|---|---|---|
| `ETHERSFLOW_TOKEN` | yes | yes | EthersFlow API key for authenticating consensus requests |
| `ETHERSFLOW_BASE_URL` | no | no |  |

## FAQ

### What happens if the EthersFlow gateway encounters an error or timeout?

The system follows a strict fail-closed guarantee, meaning it will always return a rejected verdict rather than approving an action without verification.

### What are the different execution lanes for verification?

It uses a Policy Fast Path for deterministic safety checks and an Adversarial Consensus lane for multi-model debate across heterogeneous frontier models.