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API Reference
Workers
Scripts

Versions

List Versions
GET/accounts/{account_id}/workers/scripts/{script_name}/versions
Get Version Detail
GET/accounts/{account_id}/workers/scripts/{script_name}/versions/{version_id}
Upload Version
POST/accounts/{account_id}/workers/scripts/{script_name}/versions
ModelsExpand Collapse
VersionListResponse object { id, metadata, number }
id: optional string

Unique identifier for the version.

metadata: optional object { author_email, author_id, created_on, 3 more }
author_email: optional string

Email of the user who created the version.

author_id: optional string

Identifier of the user who created the version.

created_on: optional string

When the version was created.

hasPreview: optional boolean

Whether the version can be previewed.

modified_on: optional string

When the version was last modified.

source: optional "unknown" or "api" or "wrangler" or 8 more

The source of the version upload.

One of the following:
"unknown"
"api"
"wrangler"
"terraform"
"dash"
"cf_cli"
"dash_template"
"integration"
"quick_editor"
"playground"
"workersci"
number: optional number

Sequential version number.

VersionGetResponse object { resources, id, metadata, number }
resources: object { bindings, script, script_runtime }
bindings: optional

List of bindings attached to a Worker. You can find more about bindings on our docs: https://developers.cloudflare.com/workers/configuration/multipart-upload-metadata/#bindings.

script: optional object { etag, handlers, last_deployed_from, named_handlers }
etag: optional string

Hashed script content

handlers: optional array of string

The names of handlers exported as part of the default export.

last_deployed_from: optional string

The client most recently used to deploy this Worker.

named_handlers: optional array of object { handlers, name }

Named exports, such as Durable Object class implementations and named entrypoints.

handlers: optional array of string

The names of handlers exported as part of the named export.

name: optional string

The name of the exported class or entrypoint.

script_runtime: optional object { compatibility_date, compatibility_flags, exports, 3 more }

Runtime configuration for the Worker.

compatibility_date: optional string

Date indicating targeted support in the Workers runtime. Backwards incompatible fixes to the runtime following this date will not affect this Worker.

compatibility_flags: optional array of string

Flags that enable or disable certain features in the Workers runtime.

exports: optional map[object { type, cache, state } or object { storage, type, container, state } or object { state, type } or 3 more]

Declarative exports for this version, including Durable Object classes (with their storage backend) and named Worker entrypoints. Tombstoned lifecycle entries are omitted, so only live exports (created and expecting-transfer) are returned.

One of the following:
Worker object { type, cache, state }

A named Worker entrypoint export (type: worker). Worker entrypoints are always live (state: created) and carry no storage or lifecycle fields. The optional cache block overrides the Worker’s global cache_options.enabled for this entrypoint.

type: "worker"

Marks this entry as a Worker entrypoint export.

cache: optional object { enabled }

Cache override for this entrypoint. Overrides the Worker’s global cache_options.enabled for this entrypoint only.

enabled: boolean

Whether caching is enabled for this entrypoint.

state: optional "created"

Live export. May be omitted; defaults to created.

WorkersDurableObjectExport object { storage, type, container, state }

A live Durable Object export (state: created, the default). The platform auto-provisions the namespace on first deploy, matches it on subsequent deploys, and never mutates or deletes it as a side effect of a code-only change. storage is required; renamed_to, transferred_to and transfer_from are not allowed on a live entry.

storage: "sqlite" or "legacy-kv"

Durable Object storage backend. sqlite is the recommended (and only) backend for new namespaces. legacy-kv is accepted only for a class whose namespace already exists as KV-backed; the exports flow never provisions a new legacy-kv namespace.

One of the following:
"sqlite"
"legacy-kv"
type: "durable-object"

Marks this entry as a Durable Object export.

container: optional string

Name of the container (declared in the upload’s metadata.containers) that backs this Durable Object. When set, the namespace is container-enabled. Valid only on live entries.

maxLength128
state: optional "created"

Live export. May be omitted; defaults to created.

WorkersDurableObjectDeletedExport object { state, type }

A deleted tombstone: retires the provisioned namespace for this class and all of its data. The class must be absent from the uploaded code and no other Worker in the account may bind to the namespace, otherwise the deploy is rejected. No other fields are allowed. Deletion is irreversible.

state: "deleted"

Tombstone that deletes the namespace.

type: "durable-object"

Marks this entry as a Durable Object export.

WorkersDurableObjectRenamedExport object { renamed_to, state, type }

A renamed tombstone: rewrites the provisioned namespace’s class name from this map key to renamed_to. The source class may stay in code during the rollout window (an info notice is emitted). storage, transferred_to and transfer_from are not allowed.

renamed_to: string

The destination class name. Must differ from the source class (the map key) and must be declared as a live (created) entry in the same exports map. Write-only: never present in GET responses.

maxLength128
state: "renamed"

Tombstone that renames the namespace’s class.

type: "durable-object"

Marks this entry as a Durable Object export.

WorkersDurableObjectTransferredExport object { state, transferred_to, type }

A transferred tombstone (source side of a two-phase transfer): hands ownership of the provisioned namespace to another script in the same account, named by transferred_to. The target must have already deployed a matching expecting-transfer entry. The source class may stay in code during the rollout window (an info notice is emitted). storage, renamed_to and transfer_from are not allowed.

state: "transferred"

Tombstone that transfers the namespace to another script.

transferred_to: string

The destination script name. Must be in the same account and the same dispatch-namespace context (or both non-dispatch). Cross-dispatch-namespace transfers are rejected. Write-only: never present in GET responses.

maxLength128
type: "durable-object"

Marks this entry as a Durable Object export.

WorkersDurableObjectExpectingTransferExport object { state, storage, transfer_from, 2 more }

The target side of a two-phase transfer (state: expecting-transfer). Declares that this script expects to receive a namespace for this class from the transfer_from script. This is a live entry, not a tombstone: bindings resolve through the source’s namespace until the source commits with a transferred tombstone. storage and transfer_from are required; renamed_to and transferred_to are not allowed.

state: "expecting-transfer"

Target side of a two-phase transfer.

storage: "sqlite" or "legacy-kv"

Durable Object storage backend. sqlite is the recommended (and only) backend for new namespaces. legacy-kv is accepted only for a class whose namespace already exists as KV-backed; the exports flow never provisions a new legacy-kv namespace.

One of the following:
"sqlite"
"legacy-kv"
transfer_from: string

The source script name to receive the namespace from. Must be in the same account and dispatch-namespace context. Present on reads for expecting-transfer entries.

maxLength128
type: "durable-object"

Marks this entry as a Durable Object export.

container: optional string

Name of the container (declared in the upload’s metadata.containers) that backs this Durable Object once the transfer settles. Valid only on live entries.

maxLength128
limits: optional object { cpu_ms }

Resource limits for the Worker.

cpu_ms: optional number

The amount of CPU time this Worker can use in milliseconds.

migration_tag: optional string

The tag of the Durable Object migration that was most recently applied for this Worker.

usage_model: optional "bundled" or "unbound" or "standard"

Usage model for the Worker invocations.

One of the following:
"bundled"
"unbound"
"standard"
id: optional string

Unique identifier for the version.

metadata: optional object { author_email, author_id, created_on, 3 more }
author_email: optional string

Email of the user who created the version.

author_id: optional string

Identifier of the user who created the version.

created_on: optional string

When the version was created.

hasPreview: optional boolean

Whether the version can be previewed.

modified_on: optional string

When the version was last modified.

source: optional "unknown" or "api" or "wrangler" or 8 more

The source of the version upload.

One of the following:
"unknown"
"api"
"wrangler"
"terraform"
"dash"
"cf_cli"
"dash_template"
"integration"
"quick_editor"
"playground"
"workersci"
number: optional number

Sequential version number.

VersionCreateResponse object { resources, id, exports_reconciliation, 3 more }
resources: object { bindings, script, script_runtime }
bindings: optional

List of bindings attached to a Worker. You can find more about bindings on our docs: https://developers.cloudflare.com/workers/configuration/multipart-upload-metadata/#bindings.

script: optional object { etag, handlers, last_deployed_from, named_handlers }
etag: optional string

Hashed script content

handlers: optional array of string

The names of handlers exported as part of the default export.

last_deployed_from: optional string

The client most recently used to deploy this Worker.

named_handlers: optional array of object { handlers, name }

Named exports, such as Durable Object class implementations and named entrypoints.

handlers: optional array of string

The names of handlers exported as part of the named export.

name: optional string

The name of the exported class or entrypoint.

script_runtime: optional object { compatibility_date, compatibility_flags, exports, 3 more }

Runtime configuration for the Worker.

compatibility_date: optional string

Date indicating targeted support in the Workers runtime. Backwards incompatible fixes to the runtime following this date will not affect this Worker.

compatibility_flags: optional array of string

Flags that enable or disable certain features in the Workers runtime.

exports: optional map[object { type, cache, state } or object { storage, type, container, state } or object { state, type } or 3 more]

Declarative exports for this version, including Durable Object classes (with their storage backend) and named Worker entrypoints. Tombstoned lifecycle entries are omitted, so only live exports (created and expecting-transfer) are returned.

One of the following:
Worker object { type, cache, state }

A named Worker entrypoint export (type: worker). Worker entrypoints are always live (state: created) and carry no storage or lifecycle fields. The optional cache block overrides the Worker’s global cache_options.enabled for this entrypoint.

type: "worker"

Marks this entry as a Worker entrypoint export.

cache: optional object { enabled }

Cache override for this entrypoint. Overrides the Worker’s global cache_options.enabled for this entrypoint only.

enabled: boolean

Whether caching is enabled for this entrypoint.

state: optional "created"

Live export. May be omitted; defaults to created.

WorkersDurableObjectExport object { storage, type, container, state }

A live Durable Object export (state: created, the default). The platform auto-provisions the namespace on first deploy, matches it on subsequent deploys, and never mutates or deletes it as a side effect of a code-only change. storage is required; renamed_to, transferred_to and transfer_from are not allowed on a live entry.

storage: "sqlite" or "legacy-kv"

Durable Object storage backend. sqlite is the recommended (and only) backend for new namespaces. legacy-kv is accepted only for a class whose namespace already exists as KV-backed; the exports flow never provisions a new legacy-kv namespace.

One of the following:
"sqlite"
"legacy-kv"
type: "durable-object"

Marks this entry as a Durable Object export.

container: optional string

Name of the container (declared in the upload’s metadata.containers) that backs this Durable Object. When set, the namespace is container-enabled. Valid only on live entries.

maxLength128
state: optional "created"

Live export. May be omitted; defaults to created.

WorkersDurableObjectDeletedExport object { state, type }

A deleted tombstone: retires the provisioned namespace for this class and all of its data. The class must be absent from the uploaded code and no other Worker in the account may bind to the namespace, otherwise the deploy is rejected. No other fields are allowed. Deletion is irreversible.

state: "deleted"

Tombstone that deletes the namespace.

type: "durable-object"

Marks this entry as a Durable Object export.

WorkersDurableObjectRenamedExport object { renamed_to, state, type }

A renamed tombstone: rewrites the provisioned namespace’s class name from this map key to renamed_to. The source class may stay in code during the rollout window (an info notice is emitted). storage, transferred_to and transfer_from are not allowed.

renamed_to: string

The destination class name. Must differ from the source class (the map key) and must be declared as a live (created) entry in the same exports map. Write-only: never present in GET responses.

maxLength128
state: "renamed"

Tombstone that renames the namespace’s class.

type: "durable-object"

Marks this entry as a Durable Object export.

WorkersDurableObjectTransferredExport object { state, transferred_to, type }

A transferred tombstone (source side of a two-phase transfer): hands ownership of the provisioned namespace to another script in the same account, named by transferred_to. The target must have already deployed a matching expecting-transfer entry. The source class may stay in code during the rollout window (an info notice is emitted). storage, renamed_to and transfer_from are not allowed.

state: "transferred"

Tombstone that transfers the namespace to another script.

transferred_to: string

The destination script name. Must be in the same account and the same dispatch-namespace context (or both non-dispatch). Cross-dispatch-namespace transfers are rejected. Write-only: never present in GET responses.

maxLength128
type: "durable-object"

Marks this entry as a Durable Object export.

WorkersDurableObjectExpectingTransferExport object { state, storage, transfer_from, 2 more }

The target side of a two-phase transfer (state: expecting-transfer). Declares that this script expects to receive a namespace for this class from the transfer_from script. This is a live entry, not a tombstone: bindings resolve through the source’s namespace until the source commits with a transferred tombstone. storage and transfer_from are required; renamed_to and transferred_to are not allowed.

state: "expecting-transfer"

Target side of a two-phase transfer.

storage: "sqlite" or "legacy-kv"

Durable Object storage backend. sqlite is the recommended (and only) backend for new namespaces. legacy-kv is accepted only for a class whose namespace already exists as KV-backed; the exports flow never provisions a new legacy-kv namespace.

One of the following:
"sqlite"
"legacy-kv"
transfer_from: string

The source script name to receive the namespace from. Must be in the same account and dispatch-namespace context. Present on reads for expecting-transfer entries.

maxLength128
type: "durable-object"

Marks this entry as a Durable Object export.

container: optional string

Name of the container (declared in the upload’s metadata.containers) that backs this Durable Object once the transfer settles. Valid only on live entries.

maxLength128
limits: optional object { cpu_ms }

Resource limits for the Worker.

cpu_ms: optional number

The amount of CPU time this Worker can use in milliseconds.

migration_tag: optional string

The tag of the Durable Object migration that was most recently applied for this Worker.

usage_model: optional "bundled" or "unbound" or "standard"

Usage model for the Worker invocations.

One of the following:
"bundled"
"unbound"
"standard"
id: optional string

Unique identifier for the version.

exports_reconciliation: optional object { created, deleted, info, 6 more }

Summary of the declarative exports reconciliation that ran on this upload. Populated only when the uploaded metadata included an exports block. Durable Object entries drive reconciliation; type: worker entries do not contribute to this summary.

created: array of string

Class names for which a new namespace was provisioned.

deleted: array of string

Class names whose namespace was deleted by a deleted tombstone.

info: array of object { class, message, scenario, 2 more }

Non-blocking info entries (stale tombstones, tombstone applied with class still in code). See exports_reconciliation_info.

class: string

The class name the info entry is about.

message: string

Human-readable explanation.

scenario: "code_class_not_in_exports" or "provisioned_class_missing_from_config" or "config_export_not_in_code" or 30 more

Stable, machine-readable tag identifying which reconciliation scenario produced an error, warning, or info entry. Clients may branch on this value instead of parsing message.

One of the following:
"code_class_not_in_exports"
"provisioned_class_missing_from_config"
"config_export_not_in_code"
"config_references_nonexistent_class"
"orphaned_provisioned_namespace"
"storage_type_mismatch"
"free_tier_requires_sqlite"
"invalid_export"
"tombstone_delete_class_still_in_code"
"tombstone_delete_blocked_by_external_bindings"
"tombstone_renamed_to_occupied"
"transferred_pending_not_found"
"transferred_target_missing"
"transferred_target_mismatch"
"phase_one_transfer_source_missing"
"phase_one_transfer_source_namespace_missing"
"phase_one_transfer_target_class_provisioned"
"phase_one_transfer_after_commit_mismatch"
"phase_one_transfer_duplicate"
"phase_one_transfer_target_in_dispatch_namespace"
"phase_one_transfer_source_in_dispatch_namespace"
"transferred_source_in_dispatch_namespace"
"transferred_target_in_dispatch_namespace"
"container_undeclared_reference"
"container_class_not_durable_object"
"container_wiring_inconsistent"
"container_multiple_durable_objects"
"transfer_container_parity_mismatch"
"transfer_container_parity_mismatch_on_commit"
"tombstone_class_still_in_code"
"stale_tombstone"
"transfer_receive_already_applied"
"transfer_receive_cleanup_complete"
namespace_id: optional string

The provisioned namespace the entry relates to, when applicable.

formatuuid
referencing_scripts: optional array of string

Other Workers in the account that still bind to the affected class. Advisory: while non-empty the tombstone is not yet safe to remove — redeploy these Workers with bindings re-pointed first.

removable_entries: array of string

Source class names whose tombstone entry is now stale and safe to delete from exports (no remaining referencing scripts).

renamed: array of object { from, to }

Applied renamed tombstones.

from: string

The original (source) class name.

to: string

The new class name (renamed_to).

transfer_pending: array of object { class, from }

Phase-1 transfer hints recorded on the target side.

class: string

The target-side class name awaiting transfer.

from: string

The source script the namespace will be transferred from.

transferred: array of object { class, phase, to }

Committed transferred tombstones (phase-2).

class: string

The source class name that was transferred.

phase: "committed"

The transfer phase. Currently always committed.

to: string

The destination script that now owns the namespace.

updated: array of string

Class names whose provisioned namespace was mutated in place.

warnings: array of object { class, message, scenario, namespace_id }

Non-blocking warnings. See exports_reconciliation_warning.

class: string

The class name the warning is about.

message: string

Human-readable explanation of the warning.

scenario: "code_class_not_in_exports" or "provisioned_class_missing_from_config" or "config_export_not_in_code" or 30 more

Stable, machine-readable tag identifying which reconciliation scenario produced an error, warning, or info entry. Clients may branch on this value instead of parsing message.

One of the following:
"code_class_not_in_exports"
"provisioned_class_missing_from_config"
"config_export_not_in_code"
"config_references_nonexistent_class"
"orphaned_provisioned_namespace"
"storage_type_mismatch"
"free_tier_requires_sqlite"
"invalid_export"
"tombstone_delete_class_still_in_code"
"tombstone_delete_blocked_by_external_bindings"
"tombstone_renamed_to_occupied"
"transferred_pending_not_found"
"transferred_target_missing"
"transferred_target_mismatch"
"phase_one_transfer_source_missing"
"phase_one_transfer_source_namespace_missing"
"phase_one_transfer_target_class_provisioned"
"phase_one_transfer_after_commit_mismatch"
"phase_one_transfer_duplicate"
"phase_one_transfer_target_in_dispatch_namespace"
"phase_one_transfer_source_in_dispatch_namespace"
"transferred_source_in_dispatch_namespace"
"transferred_target_in_dispatch_namespace"
"container_undeclared_reference"
"container_class_not_durable_object"
"container_wiring_inconsistent"
"container_multiple_durable_objects"
"transfer_container_parity_mismatch"
"transfer_container_parity_mismatch_on_commit"
"tombstone_class_still_in_code"
"stale_tombstone"
"transfer_receive_already_applied"
"transfer_receive_cleanup_complete"
namespace_id: optional string

The provisioned namespace the warning relates to, when applicable.

formatuuid
metadata: optional object { author_email, author_id, created_on, 3 more }
author_email: optional string

Email of the user who created the version.

author_id: optional string

Identifier of the user who created the version.

created_on: optional string

When the version was created.

hasPreview: optional boolean

Whether the version can be previewed.

modified_on: optional string

When the version was last modified.

source: optional "unknown" or "api" or "wrangler" or 8 more

The source of the version upload.

One of the following:
"unknown"
"api"
"wrangler"
"terraform"
"dash"
"cf_cli"
"dash_template"
"integration"
"quick_editor"
"playground"
"workersci"
number: optional number

Sequential version number.

startup_time_ms: optional number

Time in milliseconds spent on Worker startup.