> ## Documentation Index > Fetch the complete documentation index at: https://site.aspect.build/llms.txt > Use this file to discover all available pages before exploring further. # Exporters `function` **Exporters.add** 
        
          def Exporters.add(
          \*,
          url: None | str = None,
          file: None | str = None,
          protocol: None | str = None,
          format: None | str = None,
          headers: dict\[str, str] = ...,
          signals: list\[str] = \[],
          resource\_attributes: dict\[str, str] = ...
          ) -> None
Register an exporter. The runtime builds the corresponding sink after phase 3 and replays any buffered spans/logs into it. Exactly one of `url` (OTLP exporter) or `file` (local file/stderr/stdout exporter) must be provided. Args (OTLP shape): url: OTLP collector URL protocol: "grpc" (default) or "http/protobuf" headers: optional dict\[str,str] for auth/tenant routing Args (file shape): file: filesystem path, or "stderr" / "stdout" format: "compact" (default, one human-readable line per record) or "jsonl" (one JSON object per line, machine-parseable) Common args: signals: optional list, subset of \["traces", "logs", "metrics"]; default is all three resource\_attributes: optional dict\[str,str] merged into the exporter's Resource