apix — API Explorer for Agents

apix is a CLI tool for importing, browsing, searching, and calling API endpoint documents stored as local markdown vaults.

Prerequisites & Installation

Before using apix, verify if it is installed:

apix --version

If it is not installed, install it using Homebrew (macOS/Linux):

brew tap apix-sh/tap
brew install apix

Or via the curl installer:

curl -fsSL https://apix.sh/install | sh

Agent Workflow Guidelines

When an API task is requested, follow this general workflow:

1. Discover: Find the relevant endpoint route.

bash apix search "create pet" # Or list available APIs: apix ls

1. Inspect: Check the endpoint parameters and schema concisely to save your context window.

bash apix peek petstore/v1/pets/{petId}/GET

Note: Only use apix show <route> if you need the full, detailed documentation, as it can be long.

1. Execute: Make the HTTP call using the route you found. bash apix call demo/v1/items/{id}/POST -p id=item_123 -d '{"name":"item"}'

Core Commands

Search & Discovery

• Search across all indexed APIs: apix search <query>
• List namespaces: apix ls
• List endpoints in a namespace: apix ls <namespace>/<version> (e.g., apix ls petstore/v1)
• Full-text search within a namespace: apix grep <namespace> <query>

Inspecting Endpoints

Routes follow the format: <namespace>/<version>/<path segments>/<METHOD> (e.g., petstore/v1/pets/GET).

• Peek (Recommended for Agents): apix peek <route> — Outputs the YAML frontmatter and condensed required input fields.
• Show: apix show <route> — Outputs the full markdown documentation for the route or type.

Executing HTTP Calls

apix call automatically resolves the URL, method, and auth requirements from the route's markdown frontmatter.

• Basic call with a literal path segment:

bash apix call demo/v1/items/item_123/GET

(apix automatically maps item_123 to the {id} parameter if the defined route is demo/v1/items/{id}/GET)

• Explicit parameters:

bash apix call demo/v1/items/{id}/POST -p id=item_123 -q expand=full -H "Authorization: Bearer <token>" -d '{"name":"item"}'

• -p <key>=<value>: Path parameter
• -q <key>=<value>: Query parameter
• -H "<Header>: <Value>": HTTP Header
• -d '<data>' or -d @file.json: Request body

Importing Custom Specs

If the required API is not in the public registry, you can import an OpenAPI 3.x spec locally:

apix import /path/to/openapi.json --name myapi

Notes for Agents

• When you execute apix commands via the shell, it detects that stdout is piped and will automatically emit raw markdown, which is perfectly structured for you to read.
• apix routes are standard strings. If a route matches multiple sources, apix will throw an ambiguity error. In that case, prefix the route with the source (e.g., core/petstore/v1/pets/GET).
• Prioritize peek over show to avoid flooding your context window with redundant schemas.