Headers

The Headers tab lets you add, enable, disable, and remove HTTP request headers.

Adding Headers

1. Go to the Headers tab
2. Click Add to insert a new row
3. Enter the header key (e.g. Content-Type) and value (e.g. application/json)
4. Toggle the checkbox to enable or disable the header

Common Headers

Header	Example Value	Purpose
Content-Type	application/json	Indicates request body format
Authorization	Bearer {{token}}	Authentication
Accept	application/json	Expected response format
X-API-Key	{{api_key}}	Custom API key

Environment Variables

Use {{variable_name}} in header values. Flamingo resolves them using the active environment before sending.

Example

// Active environment: Production
//   token = prod-jwt-token-abc123
//
// Headers:
//   Authorization = Bearer {{token}}
//   Content-Type  = application/json
//   X-Debug       = true      (disabled - not sent)
//
// Sent headers:
//   Authorization: Bearer prod-jwt-token-abc123
//   Content-Type: application/json