Deregister a runner

⚠️
Preview — this feature is being built; the design below is the spec.
DELETE https://app.syntic.ai/v1/environments/{environment_id}/runners/{runner_id}

Revoke the runner’s token and remove it. With drain=true (the default) the runner first stops claiming new work and is removed when its active sessions end; with drain=false its sessions fail over to another runner, or end with runner_lost if none is online.

For how this fits into a full workflow, see Self-hosted runners.

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
environment_idstringThe environment id, starting with env_.
runner_idstringThe runner id, starting with rnr_.

Query parameters

ParameterTypeDefaultDescription
drainbooleantrueWait for active sessions to finish before removing.

Response

200 OK, Content-Type: application/json

{
  "id": "rnr_01JCD0B2D4F6H8K0M2P4",
  "type": "runner",
  "status": "draining",
  "deleted": false
}
FieldTypeDescription
deletedbooleantrue once removed; false while draining.

Examples

curl -sS -X DELETE "https://app.syntic.ai/v1/environments/env_01JC5B2D4F6H8K0M2P4R/runners/rnr_01JCD0B2D4F6H8K0M2P4?drain=false" \
  -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.
404not_found_errorrunner_not_foundNo runner with this id.
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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