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Claude protocol

Connect with the Claude Messages format.

Service address​

This page covers Claude Messages and Claude model discovery. Claude Code and similar clients usually use the root Base URL and append /v1/messages; model access still follows the live portal.

Models and discovery​

PurposeMethodPath
Model listGET/v1/models

Messages​

PurposeMethodPath
MessagesPOST/v1/messages

Minimal request​

Use https://api.popgo.site as the Anthropic SDK Base URL, or https://api.popgo.site/v1/messages as the full Endpoint. Prefer x-api-key: YOUR_API_KEY; the gateway also accepts Authorization: Bearer YOUR_API_KEY. Set anthropic-version to 2023-06-01.

curl https://api.popgo.site/v1/messages \
  -H "x-api-key: YOUR_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "content-type: application/json" \
  -d '{
    "model": "YOUR_MODEL",
    "max_tokens": 64,
    "messages": [
      {"role": "user", "content": "Reply with a connection confirmation"}
    ]
  }'

Verify​

A successful response contains content blocks. For authentication errors, check x-api-key or Bearer; for path errors, ensure the client appends /v1/messages only once and that the model is available through the Claude group.