YAML in.
HTTP out.

Chain API requests in YAML. Switch environments with a flag. Run complex workflows from your terminal. Commit to git. No Electron apps.

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Requires curl (macOS/Linux) or PowerShell (Windows)

auth-flow.yapi.yml

yapi: v1

# Chain requests together

chain:

- name: login

url: ${url}/auth/login

method: POST

body:

user: "dev_sheep"

expect:

assert:

- .token != null

- name: get_profile

url: ${url}/me

headers:

Auth: Bearer ${login.token}

zsh — yapi run

$ yapi run auth-flow.yapi.yml -e prod

Running step 1: login...
Running step 2: get_profile...

--- Step 2: get_profile ---

{
"name": "Dev Sheep",
"email": "dev@example.com",
"role": "admin"
}

URL: https://api.example.com/me
Time: 67ms
Size: 78B

Chain completed successfully.

🔗

Request Chaining

Chain requests together declaratively. Pass data between steps. Validate with assertions. Build auth flows and integration tests without a separate framework.

🌍

Environment Configs

One yapi.config.yml to manage dev, staging, and prod. Switch with a flag. No duplicate files. Load secrets from shell env. Perfect for teams and CI/CD.

🧠

Built-in LSP

Full Language Server with autocompletion, real-time validation, and hover info. Works with Neovim, VS Code, and any LSP-compatible editor. No extensions needed.

⚡

Go Native Speed

Written in Go. Starts instantly. Uses minimal RAM. No Electron bloat, no loading spinners, no updates that move your buttons. Just a fast, reliable CLI tool.

🤝

Team Friendly

Review API changes in Pull Requests. Diff your request bodies. Merge conflicts are just text conflicts. True collaboration without shared cloud workspaces.