Connect Claude API (Messages with mcp_servers)

Use Brunu directly from any Anthropic API call by passing the server URL in the mcp_servers array. Requires the mcp-client beta header.

Paste this

curl https://api.anthropic.com/v1/messages \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "anthropic-beta: mcp-client-2025-04-04" \
  -H "content-type: application/json" \
  -d '{
    "model": "claude-sonnet-4-6",
    "max_tokens": 1024,
    "mcp_servers": [{
      "type": "url",
      "url": "https://www.brunu.ai/api/mcp",
      "name": "brunu"
    }],
    "messages": [{
      "role": "user",
      "content": "What does Brunu predict about Brent crude this month?"
    }]
  }'

Steps

Set ANTHROPIC_API_KEY in your environment (console.anthropic.com)
Include the anthropic-beta: mcp-client-2025-04-04 header
Add Brunu to the mcp_servers array on every Messages call where you want forecast access

Test it works

Once connected, ask the AI:

What is Brunu's track record on geopolitical forecasts?

The AI should call brunu_get_track_record and quote the live numbers.

Client docs: https://docs.anthropic.com/en/docs/agents-and-tools/mcp-connector

Issues or want a client added? info@etra.global