List spans
Retrieve spans matching the specified filters with pagination. Supports filtering by any span field, URL-based quick filters, and sorting by evaluator scores. See Filters API Reference for full filter syntax.
Query parameters
Page number.
Results per page (max 1000).
Field to sort by. Prefix - for descending.
Start of time range (ISO 8601).
End of time range (ISO 8601).
Filter by environment (prod or test).
Filter by span/log type. Use values like chat, completion, or response to focus on model-inference spans; omitting this can also return non-chat span/log rows such as legacy text logs.
Comma-separated list of fields to include in each span. Reduces response size.
Headers
Use your Respan API key for Respan API authentication. Enter only the Respan API key value; clients send Authorization: Bearer <RESPAN_API_KEY>. For /api/responses, OpenAI or Azure OpenAI provider credentials go in Settings -> Providers or the request body credential_override field, not in this auth field.
Request body
Response
Successful response for List spans