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GET
Discover what the trace filter fields hold

Authorizations

X-Auth-Token
string
header
required

Project API key for sending traces and accessing project-scoped resources. Format: sk-lw-... (no underscore). Obtain one by creating a project via the Admin API or the LangWatch UI.

Query Parameters

field
string
Required string length: 1 - 512
prefix
string
Maximum string length: 512
limit
integer
default:50
Required range: 1 <= x <= 1000
offset
integer
default:0
Required range: x >= 0
startDate
string
endDate
string

Response

Without field, every facet the project has with its top values and whether the payload is still being computed. With field, that field's values and counts plus the distinct total and whether more remain.

facets
object[]
required
pending
boolean
required

True when the payload is still being computed and what you have is the last committed one, possibly empty. Call again shortly.

Last modified on September 18, 2026