Skip to main content
Cloud workers let a session run its agent loop on a throwaway cloud machine while everything about the session stays where it always was: visible in the sidebar, streaming live, with the transcript owned by the Gateway. The Gateway leases a box, installs a pinned copy of OpenClaw on it, syncs the session’s workspace over, and hands the turn loop to a restricted openclaw worker process. Model calls are proxied back through the Gateway, so provider credentials never leave your machine, and prompt caching keeps working because the provider sees one continuous stream. When the work is done (or the box dies), the machine is discarded. The durable state — transcript, workspace commits, placement records — lives with the Gateway.
Cloud workers are opt-in. Until you configure a profile, clients hide the Cloud destination and the Gateway does not advertise sessions.dispatch. The cloudWorkers config schema and the read-only environments.list and environments.status methods remain available for configuration and environment discovery.

​
What runs where

The box needs no inbound ports except sshd: the Gateway connects out via pinned SSH, and a reverse tunnel carries the worker’s WebSocket back. The bundled Crabbox provider forces the public SSH route and disables managed Tailscale enrollment. Outbound internet access is provider policy; the default AWS profile can reach the internet unless you restrict its network or security group.

​
Requirements

  • A worker provider plugin. The bundled crabbox plugin drives the Crabbox CLI, which brokers leases across cloud backends (AWS, Hetzner, and others). Install the crabbox binary for the operating-system user that runs the Gateway and put it on that user’s PATH, or set settings.binary to its absolute path. AWS admission requires Crabbox 0.38.1 or newer.
  • For Crabbox AWS workers, the effective aws.instanceProfile must be empty. The provider checks crabbox config show --json before allocation, then requires crabbox inspect --json to report providerMetadata.instanceProfileAttached: false from EC2 DescribeInstances. Leases with an instance role or without authoritative metadata are stopped and rejected.
  • Node.js on the leased machine. Bare cloud images usually lack it — install it in the profile’s setup command.
  • A live, registry-owned session managed worktree (create one with worktree: true). Cloud dispatch does not accept an arbitrary plain directory. After dispatch admission, the workspace transport may use manifest mirroring if Git metadata later becomes unavailable; this transport behavior does not make plain directories dispatchable.

​
Coordinator-backed Crabbox

In managed mode, the Crabbox coordinator owns the cloud-provider credentials and provisions AWS on the Gateway user’s behalf. Local AWS keys are not required. Authenticate interactively, then verify the stored coordinator and provider state: Before provisioning, determine the Gateway host’s outbound IPv4:
Add that address as a /32 to Crabbox’s own configuration. For example, if the command prints 203.0.113.10:
Direct SSH originates from the Gateway host, while the coordinator API may see a reverse-proxy or request-source address. Explicit pinning keeps later Crabbox security-group reconciliation from replacing the actual SSH caller with that API-facing address.
Before provisioning, confirm crabbox config show --json reports the expected /32 under aws.sshCIDRs, then review crabbox doctor --provider aws --json for provider-readiness failures. doctor is non-mutating: it checks the coordinator, broker identity, local tools, and AWS provider readiness without creating or changing a lease. Trusted automation can pipe an approved coordinator token through stdin instead of placing it on the command line:
Keep the token out of repository config and shell arguments.

​
Configuration

Add a profile under cloudWorkers.profiles in openclaw.json:
Profile fields: Crabbox inspect reports a primary SSH port and may advertise ordered fallback ports. OpenClaw persists that order across Gateway restarts. Its shared pinned SSH transport rotates candidates only for replay-safe operations: idempotent probes, content-addressed transfers, receipt/lock-guarded artifact installation, convergent managed-worktree mirroring, and tunnel reconnects. Ambiguous unguarded stateful commands fail closed on their current candidate and are not replayed on another port. OpenClaw never invents an unadvertised port. If your network policy pins SSH ingress, allow at least one advertised Crabbox candidate.

​
The setup command

settings.setup runs on the leased box after it is SSH-ready and before OpenClaw is installed. After setup succeeds, OpenClaw performs a fresh Crabbox inspect and waits for SSH readiness again before bootstrap, because setup may restart SSH. It runs on every provision attempt (including replays after an interrupted dispatch), so it must be idempotent — guard installs with a command -v/test -x check as in the example. If setup fails, the provider stops the lease and the dispatch fails closed; no half-configured box is left running.

​
Install channels

  • bundle packs the running Gateway’s dist, a pruned package.json, and any workspace packages the build references, all covered by a content hash. The box verifies the pristine bundle against that hash, then installs production npm dependencies (scripts disabled). This is how you run a dev build on a worker.
  • npm proves the release exists on the public registry, pins its SHA-512 integrity, and installs openclaw@<version> matching the Gateway exactly.

​
Verify the profile

Validate before restarting the Gateway:
Changes under cloudWorkers.profiles require a Gateway restart. The default gateway.reload.mode: "hybrid" watches the config and performs that restart automatically; with reload watching disabled, run openclaw gateway restart. After the Gateway is back, prove the profile is advertised and compare it with Crabbox’s read-only lease inventory:
The environments.list response must include the configured id under profiles. crabbox list is non-mutating. By contrast, crabbox warmup provisions a lease, and crabbox stop or crabbox release tears one down; use those mutating commands only when you intend to create or destroy cloud resources.

​
Dispatching a session

In the Control UI, open New Session and use the unified Place picker to choose both the working folder and a Cloud · profile destination. A cloud destination appears only when all three eligibility gates pass:
  1. The connected operator has operator.admin scope.
  2. environments.list advertises at least one configured profile.
  3. The selected Gateway folder is a Git checkout that can use a managed worktree.
Cloud selection enables that worktree automatically. The Gateway creates the session, finishes dispatch, and only then sends the first turn. The server badge in the session sidebar shows the durable placement state. Cloud workers run the OpenClaw agent runtime. Models mapped to an external runtime such as Codex or Claude CLI are disabled in the picker; select a direct model that resolves to the OpenClaw runtime. Cloud targets are not offered for external CLI session catalogs. The equivalent RPC flow is: Create a session with a managed worktree, then dispatch it. The RPC requires operator.admin and is advertised only while at least one worker profile is configured:
sessions.dispatch closes local turn admission, drains active work, provisions the lease, runs setup, bootstraps OpenClaw, syncs the workspace, and returns once the placement reaches active worker ownership. Budget several minutes for the first dispatch; leases and installs are cached where the provider supports it. After that, talk to the session as usual — turns route to the worker automatically. Completed worker turns reconcile eligible, size-bounded workspace files back into the session’s managed worktree before the turn claim is released. The terminal worker event creates a durable pending-result fence before it is acknowledged. The Gateway then stages the complete cloud result as a Git ref under refs/openclaw/worker-results/ before applying it, so the cloud version remains recoverable even if the Gateway stops during the apply. Workspace results use Git file semantics: regular files, executable bits, symlinks, additions, changes, and deletions are retained, while empty directories and other directory modes are not. The resulting file changes remain in the managed worktree for normal review and commit. Apply uses the dispatch-time manifest as the merge base. Cloud-only changes are applied, local-only changes stay in place, and paths changed on both sides use a three-way keep-local policy. A conflicted turn still finishes: the transcript reports the bounded path summary and staged result ref, the placement exposes the same conflict for the Control UI, and non-conflicting cloud changes remain applied. The notice includes git show <ref>:<path> to inspect a present cloud file and a top-level literal-pathspec git checkout <ref> -- <path> command to take it from any workspace directory. Run the commands in Bash or zsh (Git Bash on Windows). If inspect says the path does not exist, the cloud result deleted it; verify and remove the retained local path manually. If checkout reports a file/directory obstruction, move or remove the blocking local path and retry. If the staged ref itself is gone, treat the notice as stale and do not change the local path. Conflicted staged refs remain available after the normal turn fence is released; a later clean result clears the notice and retires the old ref, while explicit fence removal is the final cleanup boundary. While a fenced result is still reconciling, a new turn waits up to 15 seconds for the prior claim to release. If it is still busy, the turn fails with an actionable “previous cloud turn’s workspace result is still reconciling” message and can be retried shortly. On restart, recovery discovers pending and staged results before stale-claim cleanup, completes or retries their local apply, and reclaims dead environments only after preserving the result. The bounded SQLite rollback journal makes an interrupted filesystem apply recoverable without replaying already accepted mutations. When the work is complete and no turn is running, open the session menu and choose Stop cloud worker…. The Gateway performs one final workspace reconciliation before it destroys the environment. A placement already in draining or reconciling is finishing teardown; wait for its badge to become reclaimed before deleting the session. For a broken or runaway attached worker, an operator can call environments.destroy with { "force": true } as a last resort. Forced teardown durably marks the placement failed and abandons any unreconciled remote result before destroying the environment. The equivalent administrative RPC is:
Placement moves through a durable state machine (local → requested → provisioning → syncing → starting → active), so a Gateway restart mid-dispatch reconciles instead of leaking machines. A failed model turn keeps the active placement available for a retry. Workspace path conflicts keep the local version, apply the rest of the cloud result, and preserve the staged cloud ref for inspection; other reconciliation or lifecycle failures retain their durable recovery fence and diagnostic tail until recovery can safely retry or reclaim the environment.

​
Security model

  • Closed worker ingress. Workers speak a dedicated protocol on the tunneled socket with a closed method allowlist — a worker cannot call operator RPCs.
  • Gateway-owned tool authority. Before every turn, the Gateway projects current profile, provider, agent, group, sender, sandbox, delegation, inherited, and runtime-cap policy over the worker’s fixed coding-tool catalog. The launch envelope carries only that final closed-vocabulary subset. Explicitly capped scheduled turns reuse their trusted owner-group context without sending that identity to the box or reapplying a fresh sender overlay. Tools outside the worker catalog remain unavailable; an empty result runs with no tools.
  • Minted credentials, hashed at rest. Each dispatch mints a worker credential; the Gateway stores only its hash. Credential rotation and owner-epoch fencing guarantee at most one live owner per session — a stale worker that reconnects is fenced, never merged.
  • Host-key pinning. The provider must surface the box’s SSH host key at provision time; bootstrap connects with strict pinning and fails closed without it.
  • No standing model, forge, or cloud credentials on the box. Model auth stays on the Gateway (inference travels by {provider, model} reference), workspace git commits are authored without forge credentials, and Crabbox AWS lease metadata is checked authoritatively for an instance role before setup. Keep setup commands credential-free too.
  • Provider-owned egress. The reverse tunnel removes any OpenClaw need for direct model access, but OpenClaw does not rewrite provider firewalls. Restrict outbound traffic in the worker provider when the task requires it.
  • Durable, exactly-once transcripts. The worker commits transcript batches through a compare-and-swap protocol against the session’s leaf; a stale base fail-stops the run instead of duplicating or rebasing paid output.

​
Troubleshooting

  • No cloud profile is advertised — run openclaw gateway call environments.list --params '{}' as an admin. If the response has no profiles, validate cloudWorkers.profiles, inspect the provider plugin, and restart the Gateway. This is a configuration or provider-activation problem, not an authorization result.
  • Cloud destinations are hidden or an RPC is denied — the connected operator lacks operator.admin. Reconnect with admin scope; configuring a profile does not grant that scope.
  • “Cloud worker turns require the OpenClaw runtime” — choose a direct model whose configured runtime is OpenClaw. Models mapped to external Codex or Claude CLI runtimes do not support worker inference.
  • “Worker bootstrap requires Node.js on the leased host” — add a Node install to settings.setup (see above).
  • AWS instance-role attestation fails — clear aws.instanceProfile (and CRABBOX_AWS_INSTANCE_PROFILE, if set). Install Crabbox 0.38.1 or newer; older binaries do not expose the authoritative providerMetadata.instanceProfileAttached contract required for AWS admission.
  • Dispatch fails with a provider or bootstrap error — environments.list intentionally omits internal lastError. Inspect the session with sessions.describe; a failed placement may expose a bounded recoveryError. When deeper diagnosis is necessary, an operator on the Gateway host can inspect the durable worker state read-only. Do not edit the state database to bypass lifecycle fencing.
  • No SSH candidate is reachable — compare the Gateway host’s current outbound IPv4 with Crabbox’s effective aws.sshCIDRs in crabbox config show --json. If the matching /32 is absent, correct Crabbox’s configuration and rerun crabbox doctor --provider aws --json before retrying; the coordinator’s reverse-proxy or request-source address is not necessarily the Gateway’s direct SSH source. Then ensure the Gateway’s outbound route and the worker ingress policy permit at least one advertised candidate. OpenClaw rotates the ordered ports with the same identity and pinned host key only for idempotent probes, content-addressed transfers, receipt/lock-guarded artifact installation, convergent managed-worktree mirroring, and tunnel reconnects. Ambiguous unguarded stateful commands fail closed and are not replayed on the next port.
  • Client timeout while dispatching — openclaw gateway call defaults to a 10s timeout; pass --timeout generously (dispatch keeps running server-side either way, and a retry while provisioning is rejected with session cannot dispatch from placement provisioning).
  • Worker reclaimed after upgrading from a 2026.7.2 beta — those betas used the older worker launch contract. On restart, OpenClaw destroys an idle incompatible worker, keeps the session and workspace, marks the placement reclaimed, and provisions a current worker on the next dispatch or turn. A beta worker interrupted while still starting is marked failed after cleanup; retry the dispatch to provision it with the current contract.
  • Cloud workspace conflict notice — the turn completed and kept the local version of each listed path. Use the staged-ref commands in the notice to inspect or take the cloud version; no retry is required for the non-conflicting changes, which are already applied.
  • “The previous cloud turn’s workspace result is still reconciling” — the Gateway waited briefly for the prior result’s durable fence and could not acquire the session claim. Wait for reconciliation to finish, then retry the turn; restarting the Gateway is safe because recovery preserves staged results before reclaiming a dead worker.
  • Lease housekeeping — crabbox list --provider <backend> --json is a read-only inventory. crabbox stop --provider <backend> --id <lease> and crabbox release --provider <backend> --id <lease> are destructive and release a lease manually. Idle leases expire on the profile’s idleTimeout.