usebruno/bruno — a git-friendly, offline-first API client built for teams that commit their test collections
npm install -g @usebruno/cli
In your project root, create a collection:
mkdir bruno-anthropic && cd bruno-anthropic
Write a quick test against the new API version:
cat > test-messages.bru << 'EOF'
meta {
name: Test 2026-10-21 API
type: http
seq: 1
}
post {
url: https://api.anthropic.com/v1/messages
body: json
auth: none
}
headers {
x-api-key: {{ANTHROPIC_API_KEY}}
anthropic-version: 2026-10-21
content-type: application/json
}
body:json {
{
"model": "claude-opus-5-5",
"max_tokens": 256,
"messages": [{"role": "user", "content": "Hello"}]
}
}
EOF
bru run .