@fusengine/fusecli

OpenAPI in, CLI out — built for AI agents.

Generate production-ready CLI tools from any OpenAPI spec. Every AI agent has a Bash tool — FuseCLI turns APIs into CLI commands that agents call directly.

Install

# npm
npm install -g @fusengine/fusecli

# bun (recommended)
bun add -g @fusengine/fusecli

# GitHub
npm install -g github:fusengine/fusecli

Quick Start

# Generate a CLI from any OpenAPI spec
fusecli create exa \
  --openapi https://raw.githubusercontent.com/exa-labs/openapi-spec/refs/heads/master/exa-openapi-spec.yaml \
  --token "your-exa-api-key"

# Build the binary
fusecli bundle exa

# Link to PATH + AI agents
fusecli link exa

# Set your API key and search
exa-cli auth set "your-exa-api-key"
exa-cli search \
  --query "fusengine" \
  --num-results 3 \
  --json

Commands

| Command | Description | |---------|-------------| | fusecli create <app> --openapi <url> | Generate CLI from OpenAPI spec | | fusecli bundle <app> | Build standalone binary (~100KB) | | fusecli link <app> | Add to PATH + link SKILL.md to AI agents | | fusecli run --openapi <url> | Use API instantly without codegen | | fusecli explore --openapi <url> | Browse API resources | | fusecli list | Show installed CLIs | | fusecli doctor | Check installation health | | fusecli update <app> | Re-parse spec and regenerate | | fusecli remove <app> | Uninstall CLI | | fusecli search <query> | Search the registry | | fusecli install <source> | Install from GitHub or registry |

Why CLI over MCP?

| | CLI + --json | MCP Server | |---|:-:|:-:| | Reliability | 100% | 72% | | Tokens/session | ~1,365 | ~44,026 (32x) | | Agent support | 9/9 | 6/9 |

"Prefer CLI tools over MCP servers when both can accomplish the same task" — Anthropic docs

Agent Integration

FuseCLI generates a SKILL.md for every CLI. When linked, AI agents discover it automatically:

fusecli link exa
# Creates symlinks in: ~/.claude/skills/, ~/.cursor/skills/, ~/.codex/skills/

Full Documentation

See the main repository for full documentation, architecture details, and contributing guidelines.

License

Apache 2.0 — Fusengine