Delete a skill version

⚠️
Preview — this feature is being built; the design below is the spec.
DELETE https://app.syntic.ai/v1/skills/{skill_id}/versions/{version}

Delete one version. Agents pinned to that exact version fail their next turn with skill_version_not_found, so move them first. You cannot delete the only remaining version; delete the skill instead.

For how this fits into a full workflow, see Agent skills.

Headers

HeaderRequiredValue
AuthorizationYesBearer <key>: a private inference key (sk_live_...). See Authentication.
syntic-betaYes, while in previewagents-2026-11-01. Without it the call fails with 400 beta_required. See Versioning.

Path parameters

ParameterTypeDescription
skill_idstringThe skill id, starting with skill_.
versionstringAn exact version number. latest is not accepted here.

Response

200 OK, Content-Type: application/json

{
  "skill_id": "skill_01JBXM4",
  "version": "2",
  "deleted": true
}

Examples

curl -sS -X DELETE "https://app.syntic.ai/v1/skills/skill_01JBXM4/versions/4" \
  -H "Authorization: Bearer $SYNTIC_API_KEY" \
  -H "syntic-beta: agents-2026-11-01"

Errors

Errors use the error envelope and carry a request_id. Codes specific to this operation:

StatustypecodeWhen
400invalid_request_errorbeta_requiredThe syntic-beta header is missing.
409conflict_errorlast_versionThis is the skill’s only version.
409conflict_errorversion_in_useAn agent definition pins this version. The error lists up to 10 agent ids in details.
404not_found_errorskill_version_not_foundThe skill or version does not exist.
401authentication_errorinvalid_api_keyThe key is missing, unknown, revoked or expired.
429rate_limit_errorrate_limitedToo many requests; wait for Retry-After. See Rate-limit headers.
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