curl -X POST https://api.mcprank.com/v1/identity/refresh \
  -H "X-API-Key: sk_mcp_rank_..." \
  -H "Content-Type: application/json" \
  -d '{"refresh_token": "rt_abc123..."}'

from mcp_rank import MCPRankClient

client = MCPRankClient(api_key="sk_mcp_rank_...", user_id="user_123")
await client.initialize()

# Refresh when needed
new_tokens = await client.refresh_user_token()
print(f"New access token: {new_tokens['access_token']}")

# The client automatically updates its stored tokens

{
  "access_token": "eyJhbGciOiJSUzI1NiIs...",
  "refresh_token": "rt_xyz789...",
  "expires_in": 3600,
  "token_type": "Bearer"
}