Upload Skill Version

POST/v1/skills/{skill_id}/versions

Upload a new ZIP bundle as the next version (200 OK). The ZIP layout is the same as Create Skill (one top-level folder containing SKILL.md). Send default=true to make it the default version. List versions with GET /v1/skills/{skill_id}/versions, read one with GET /v1/skills/{skill_id}/versions/{version}, and download one with GET /v1/skills/{skill_id}/versions/{version}/content. Version identifiers are strings.

Path parameters

stringskill_idrequired

Skill ID (skl_ prefix).

Headers

Optional<string>Idempotency-Key

Optional, 1-128 bytes without leading or trailing whitespace. When omitted the service generates one, so a retried request can create a duplicate. Send your own stable key for retries.

Request body

multipart/form-data.

filefilesrequired

ZIP archive, up to 5 MiB.

Optional<string>default

true makes this the default for future attachments; false or omitted keeps the current default. Existing Agent bindings are unchanged.

curl -X POST https://api.sandbase.ai/v1/skills/skl_3c5e7a9b-1d4f-5a6c-8e2b-4d6f8a0c2e57/versions \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Idempotency-Key: release-notes-v2" \
  -F "files=@release-notes-v2.zip;type=application/zip" \
  -F "default=true"

Response200 OK

{
  "object": "skill.version",
  "id": "skl_3c5e7a9b-1d4f-5a6c-8e2b-4d6f8a0c2e57:2",
  "skill_id": "skl_3c5e7a9b-1d4f-5a6c-8e2b-4d6f8a0c2e57",
  "version": "2",
  "name": "release-notes",
  "description": "Draft release notes from merged changes.",
  "created_at": 1791360000
}

List and download versions

GET /v1/skills/{skill_id}/versions accepts limit (0-100, default 20), order (asc or desc, default desc), and after. Its response contains object: "list", data, has_more, first_id, and last_id. Pass last_id unchanged as the next after; it is a Skill-prefixed version ID, not the bare version number.

GET /v1/skills/{skill_id}/versions/{version} returns one version object. The corresponding /content endpoint returns ZIP bytes; see the download example.