List pop in KV

Pops values from the head of a list (LPOP); an emptied list is removed.

Checked 2026-09-28

Pops values from the head of a list (LPOP); an emptied list is removed.

Path POST https://api.data.sylphx.com/v1/kv-list-pops
Scope data:write
Effect write — a successful call changes state.
Collection kv
Host https://api.data.sylphx.com

#Request

Field	Type	What it is
`namespace_id`	`string`	The namespace's id. Required.
`key`	`string`	The list's key. Required.
`count`	`uint64`	How many values to pop; unset pops one, zero pops none.

#Response

Field	Type	What it is
`values`	`bytes[]`	The popped values, each base64, head first.
`length`	`uint64`	The list's length after the pop.
`version`	`uint64`	The list's version after the pop.

#Errors

UNAUTHENTICATED — No valid key or token was presented.
PERMISSION_DENIED — The key lacks the method's permission.
INVALID_FIELD — A field failed validation.
RESOURCE_NOT_FOUND — The named Resource does not exist or is not visible.

Every error arrives in the body Errors describes.

#Examples

curl -X POST "https://api.data.sylphx.com/v1/kv-list-pops" \
  -H "Authorization: Bearer $SYLPHX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"key":"…","namespace_id":"…"}'

Was this page helpful?

Tell us what is missing, wrong, or unclear — this opens a real inbox.

Send feedback

Platform links