# Get a simple histogram of transfers (Public)

Returns a simplified aggregated histogram of transfers over time. This is a public endpoint with basic rate limiting.

Note: For the full-featured histogram endpoint with all filter options, use /transfers/histogram which requires API authentication.

Endpoint: GET /transfers/histogram/simple
Version: 1.0.0
Security: ApiKeyAuth

## Query parameters:

  - `base` (string)
    Filter by specific entity or address

  - `chains` (string)
    Comma-separated list of chains

  - `flow` (string)
    Transfer direction
    Enum: "in", "out", "self", "all"

  - `timeLast` (string)
    Time range filter (e.g. "24h", "7d")

  - `timeGte` (string)
    Start time in milliseconds

  - `timeLte` (string)
    End time in milliseconds

## Response 200 fields (application/json):

  - `time` (string)
    Example: "2025-03-31T00:00:00Z"

  - `count` (integer)
    Example: 17

  - `usd` (number)
    Example: 983

## Response 400 fields (application/json):

  - `error` (string)
    Example: "Bad request"

## Response 401 fields (application/json):

  - `error` (string)
    Example: "API key missing or invalid"