07-vision

Vision — Sending Images to Claude in Go

Video #07 — Claude API in Go Series
Publish date: 2026-07-13
Type: Lightweight
Est. duration: ~15 min

What we cover

• Passing images to Claude via public URL
• Encoding local images as base64 and sending them via the Go SDK
• Building mixed text-and-image messages with NewImageBlockParam
• Practical examples: screenshot analysis, document parsing

Prerequisites

• Go 1.23+
• An Anthropic API key
• Familiarity with episodes 01–02 (basic completions and message structure)

Running the example

cd 07-vision
export ANTHROPIC_API_KEY=your_key_here
go run main.go

For the file-based example, drop a screenshot.png in the directory.

Project structure

.
├── README.md
├── go.mod
├── go.sum
└── main.go