Transloadit

Replay an Assembly

Starts a new Assembly from the inputs and Instructions of an earlier Assembly.

POSThttps://api2.transloadit.com/assemblies/{assemblyId}/replay

If an Assembly crashed, and if we can recover the input files, Transloadit can retry its execution.

You can specify a new notify_url parameter in params to avoid replaying the URL already specified for the Assembly.

Specify the steps parameter to override the Steps of the original Assembly being replayed.

The newly created Assembly embeds the original Assembly Status object in parent_assembly_status. Its assembly_url identifies the crashed Assembly being replayed.

Request example

Set ASSEMBLY_ID to your resource value without percent-encoding it.

Run this request in a server-side shell with curl and a suitable bearer token in TRANSLOADIT_TOKEN. If you need a token, expand the setup below.

Need a bearer token?

In a trusted server-side shell with curl and jq, set TRANSLOADIT_KEY and TRANSLOADIT_SECRET to your Auth Key and Auth Secret. Keep both credentials and the resulting token secret; never run this setup in browser code.

First, create a token with this endpoint’s required scopes. Your Auth Key must already grant those scopes.

if ! TOKEN_RESPONSE="$(curl --fail-with-body -sS \
  --request POST \
  --url 'https://api2.transloadit.com/token' \
  --user "${TRANSLOADIT_KEY:?Set TRANSLOADIT_KEY}:${TRANSLOADIT_SECRET:?Set TRANSLOADIT_SECRET}" \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data-urlencode 'grant_type=client_credentials' \
  --data-urlencode 'aud=api2' \
  --data-urlencode 'scope=assemblies:write')"; then
  printf '%s\n' "$TOKEN_RESPONSE" >&2
  exit 1
fi
TRANSLOADIT_TOKEN="$(printf '%s' "$TOKEN_RESPONSE" |
  jq -er '.access_token | strings | select(length > 0)')" || exit 1

Keep this shell open and run the request below. Reuse the token while it remains valid.

curl --fail-with-body -sS --request POST \
  --url "https://api2.transloadit.com/assemblies/${ASSEMBLY_ID:?Set ASSEMBLY_ID}/replay" \
  --header "Authorization: Bearer ${TRANSLOADIT_TOKEN:?Set TRANSLOADIT_TOKEN}" \
  --data-urlencode 'params={}'

Authentication

This endpoint accepts signed params or a bearer token. See Authentication for setup instructions.

Required scope for the Auth Key or bearer token: assemblies:write.

Signed requests require both a signature and a future params.auth.expires timestamp. Bearer tokens do not require either.

Path parameters

  • assemblyId (path segment), required. pattern: ^[a-z0-9]{32}$

Form fields

Content type: application/x-www-form-urlencoded

  • params (JSON string), required. A JSON-encoded object whose supported keys are listed below.

  • signature (string). Required for signed requests. Omit this field when using a bearer token.

Supported keys inside the params field

Authentication fields in this list apply to signed requests. With a bearer token, you can omit params.auth and the separate signature field. Compare the authentication-specific request parameters below.

Complete JSON Schema

Open JSON in a new tab

params: Only the fields listed for this object are accepted.

FieldType and description
params.auth

required for signed requests; optional with a bearer token

object

Contains the Transloadit API key and signature-authentication metadata for an Assembly replay.

params.auth: Only the fields listed for this object are accepted.

params.auth.expires

required

string

ISO 8601 expiration timestamp in the future. Required when a request is signed or requires signature authentication; bearer-authenticated requests may omit it.

params.auth.key

required

string

Transloadit API key used to authenticate requests

params.fields
object

Values merged on top of the original Assembly fields and made available as Assembly Variables in the replay.

Additional property schema
any value
params.nonce
string | integer

Unique, random value included in signed request params to make each signature unique and prevent accidental signature reuse.

params.notify_url
null | string

Overrides the notification URL for the replayed Assembly. An omitted, null, or empty value does not override the inherited URL. By default, or when the original Assembly has no Template, the URL from the original merged Assembly Instructions is reevaluated using the replay’s fields and Assembly Variables. With reparse_template: 1 and an original Template, the URL comes from the original Assembly Status instead of the Template’s current notify_url. Supply an explicit URL to choose the destination.

params.reparse_template
0 | 1

Specify 1 to fetch and reparse the Template used by the original Assembly, which is useful if the Template changed in the meantime. Specify 0, or omit this property, to reuse the original merged Assembly Instructions.

params.steps
object | Array<referenced schema>

Replay step overrides. Object-form steps are the normal Assembly shape; array-form steps are accepted for legacy replay compatibility and normalized before execution.

Any of the following schemas may apply:

object
object
Additional property schema
object

A full Assembly step or partial replay step override. Replay keeps this relaxed so credentials and missing robot properties can be merged back from the original Template before normal Assembly validation runs.

Additional schema details are available in the complete JSON Schema.

Array<referenced schema>
Array<referenced schema>
Array item schema
object

A full Assembly step or partial replay step override. Replay keeps this relaxed so credentials and missing robot properties can be merged back from the original Template before normal Assembly validation runs.

params.steps[]: Fields beyond those listed for this object are accepted.

FieldType and description
params.steps[].field
any value
params.steps[].force_name
any value
params.steps[].key
any value
params.steps[].output_meta
any value
params.steps[].password
any value
params.steps[].prompt
any value
params.steps[].robot
string
params.steps[].secret
any value
params.steps[].url
any value
params.steps[].use
any value

Request parameters by authentication method

With signed params

Include your Auth Key as params.auth.key. When signing the request, include a future params.auth.expires timestamp and send the signature in the separate signature field. The field definitions below use paths inside params.

Complete JSON Schema

Open JSON in a new tab

params: Only the fields listed for this object are accepted.

Uses the field definitions above: params.auth, params.fields, params.nonce, params.notify_url, params.reparse_template, params.steps

With a bearer token

Send the bearer token in the Authorization header. You can omit params.auth and the separate signature field. Other required parameters still apply. The field definitions below use paths inside params.

Complete JSON Schema

Open JSON in a new tab

params: Only the fields listed for this object are accepted.

Uses the field definitions above: params.fields, params.nonce, params.notify_url, params.reparse_template, params.steps

FieldType and description
params.auth
object

Contains the Transloadit API key and signature-authentication metadata for an Assembly replay.

params.auth: Only the fields listed for this object are accepted.

params.auth.expires
string

ISO 8601 expiration timestamp in the future. Required when a request is signed or requires signature authentication; bearer-authenticated requests may omit it.

params.auth.key
string

Transloadit API key used to authenticate requests

Response

Here’s an example response body:

{
  "assembly_id": "7828446e5acd4aa996dce3455ec914e9",
  "assembly_ssl_url": "https://api2-example.transloadit.com/assemblies/7828446e5acd4aa996dce3455ec914e9",
  "assembly_url": "http://api2.example.transloadit.com/assemblies/7828446e5acd4aa996dce3455ec914e9",
  "message": "The Assembly is now in the process of being replayed.",
  "notify_url": null,
  "ok": "ASSEMBLY_REPLAYING",
  "success": true
}

2xx success

JSON response body. application/json text/plain; charset=utf-8

Response body schema
Complete JSON Schema

Open JSON in a new tab

The response may contain additional fields.

FieldType and description
assembly_id

required

string
assembly_ssl_url

required

string
assembly_url

required

string
message

required

string
notify_url

required

null | string
ok

required

string (always: "ASSEMBLY_REPLAYING")
success

required

boolean (always: true)

Error response

JSON response body. application/json text/plain; charset=utf-8

Response body schema
Complete JSON Schema

Open JSON in a new tab

At least one of these properties is required: error, message, reason

The response may contain additional fields.

FieldType and description
assembly_id
string
error
string (minimum length: 1)
http_code
number | string
  • number
  • string
    Validation pattern (regular expression)^[\x09-\x0D\x20\xA0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]*[+-]?0*(?:0(?:[^0-9]|$)|(?:[1-9][0-9]{0,307}|1(?:(?:[0-6][0-9]{7}|7[0-8][0-9]{6}|79[0-6][0-9]{5}|797[0-5][0-9]{4}|7976[0-8][0-9]{3}|79769[0-2][0-9]{2}|7976930[0-9]{1}|7976931[0-2])[0-9]{300}|79769313(?:(?:[0-3][0-9]{7}|4[0-7][0-9]{6}|48[0-5][0-9]{5}|486[0-1][0-9]{4}|4862[0-2][0-9]{3}|486230[0-9]{2}|486231[0-4][0-9]{1}|4862315[0-7])[0-9]{292}|48623158(?:(?:0[0-6][0-9]{6}|07[0-8][0-9]{5}|079[0-2][0-9]{4}|0793[0-6][0-9]{3}|07937[0-1][0-9]{2}|079372[0-7][0-9]{1}|0793728[0-8])[0-9]{284}|07937289(?:(?:[0-6][0-9]{7}|70[0-9]{6}|71[0-3][0-9]{5}|7140[0-4][0-9]{3}|71405[0-2][0-9]{2}|7140530[0-2])[0-9]{276}|71405303(?:(?:[0-3][0-9]{7}|40[0-9]{6}|41[0-4][0-9]{5}|4150[0-6][0-9]{3}|41507[0-8][0-9]{2}|415079[0-8][0-9]{1}|4150799[0-2])[0-9]{268}|41507993(?:(?:[0-3][0-9]{7}|40[0-9]{6}|41[0-2][0-9]{5}|413[0-1][0-9]{4}|4132[0-6][0-9]{3}|413270[0-9]{2})[0-9]{260}|41327100(?:(?:[0-2][0-9]{7}|3[0-6][0-9]{6}|37[0-7][0-9]{5}|378[0-1][0-9]{4}|3782[0-5][0-9]{3}|37826[0-8][0-9]{2}|378269[0-2][0-9]{1}|3782693[0-5])[0-9]{252}|37826936(?:(?:0[0-9]{7}|1[0-6][0-9]{6}|17[0-2][0-9]{5}|173[0-6][0-9]{4}|1737[0-6][0-9]{3}|17377[0-7][0-9]{2}|173778[0-8][0-9]{1}|1737789[0-7])[0-9]{244}|17377898(?:(?:0[0-3][0-9]{6}|04[0-3][0-9]{5}|044[0-3][0-9]{4}|0444[0-8][0-9]{3}|04449[0-5][0-9]{2}|044496[0-7][0-9]{1}|0444968[0-1])[0-9]{236}|04449682(?:(?:[0-8][0-9]{7}|9[0-1][0-9]{6}|92[0-6][0-9]{5}|927[0-5][0-9]{4}|9276[0-3][0-9]{3}|92764[0-6][0-9]{2}|927647[0-4][0-9]{1})[0-9]{228}|92764750(?:(?:[0-8][0-9]{7}|9[0-3][0-9]{6}|94[0-5][0-9]{5}|946[0-5][0-9]{4}|9466[0-3][0-9]{3}|94664[0-8][0-9]{2}|94664900)[0-9]{220}|94664901(?:(?:[0-6][0-9]{7}|7[0-8][0-9]{6}|79[0-6][0-9]{5}|797[0-6][0-9]{4}|7977[0-4][0-9]{3}|79775[0-7][0-9]{2}|797758[0-6][0-9]{1}|7977587[0-1])[0-9]{212}|79775872(?:(?:0[0-6][0-9]{6}|070[0-8][0-9]{4}|0709[0-5][0-9]{3}|07096[0-2][0-9]{2}|070963[0-2][0-9]{1})[0-9]{204}|07096330(?:(?:[0-1][0-9]{7}|2[0-7][0-9]{6}|28[0-5][0-9]{5}|286[0-3][0-9]{4}|28640[0-9]{3}|28641[0-5][0-9]{2}|286416[0-5][0-9]{1}|2864166[0-8])[0-9]{196}|28641669(?:(?:[0-1][0-9]{7}|2[0-7][0-9]{6}|28[0-7][0-9]{5}|288[0-6][0-9]{4}|2887[0-8][0-9]{3}|288790[0-9]{2}|2887910[0-8])[0-9]{188}|28879109(?:(?:[0-3][0-9]{7}|4[0-5][0-9]{6}|46[0-4][0-9]{5}|465[0-4][0-9]{4}|4655[0-4][0-9]{3}|46555[0-4][0-9]{2}|465555[0-3][0-9]{1}|4655554[0-6])[0-9]{180}|46555547(?:(?:[0-7][0-9]{7}|8[0-4][0-9]{6}|850[0-9]{5}|851[0-8][0-9]{4}|8519[0-3][0-9]{3}|851940[0-3][0-9]{1})[0-9]{172}|85194040(?:(?:[0-1][0-9]{7}|2[0-5][0-9]{6}|26[0-2][0-9]{5}|2630[0-5][0-9]{3}|26306[0-4][0-9]{2}|263065[0-6][0-9]{1}|2630657[0-3])[0-9]{164}|26306574(?:(?:[0-7][0-9]{7}|8[0-7][0-9]{6}|88[0-5][0-9]{5}|886[0-6][0-9]{4}|88670[0-9]{3}|88671[0-4][0-9]{2}|8867150[0-4])[0-9]{156}|88671505(?:(?:[0-7][0-9]{7}|8[0-1][0-9]{6}|820[0-5][0-9]{4}|8206[0-7][0-9]{3}|820680[0-9]{2}|820681[0-8][0-9]{1})[0-9]{148}|82068190(?:(?:[0-7][0-9]{7}|8[0-8][0-9]{6}|890[0-1][0-9]{4}|8902000[0-6])[0-9]{140}|89020007(?:(?:0[0-7][0-9]{6}|08[0-2][0-9]{5}|083[0-7][0-9]{4}|0838[0-2][0-9]{3}|08383[0-5][0-9]{2}|083836[0-6][0-9]{1}|0838367[0-5])[0-9]{132}|08383676(?:(?:[0-1][0-9]{7}|2[0-6][0-9]{6}|27[0-2][0-9]{5}|273[0-7][0-9]{4}|2738[0-4][0-9]{3}|27385[0-3][0-9]{2}|273854[0-7][0-9]{1}|2738548[0-3])[0-9]{124}|27385484(?:(?:[0-4][0-9]{7}|5[0-7][0-9]{6}|580[0-9]{5}|581[0-6][0-9]{4}|5817[0-6][0-9]{3}|581770[0-9]{2}|5817710[0-9]{1}|5817711[0-4])[0-9]{116}|58177115(?:(?:[0-2][0-9]{7}|30[0-9]{6}|31[0-6][0-9]{5}|317[0-5][0-9]{4}|3176[0-3][0-9]{3}|31764[0-3][0-9]{2}|317644[0-6][0-9]{1}|3176447[0-4])[0-9]{108}|31764475(?:(?:[0-6][0-9]{7}|7[0-2][0-9]{6}|730[0-1][0-9]{4}|7302[0-6][0-9]{3}|7302700[0-5])[0-9]{100}|73027006(?:(?:[0-8][0-9]{7}|9[0-7][0-9]{6}|98[0-4][0-9]{5}|985[0-4][0-9]{4}|9855[0-4][0-9]{3}|98555[0-6][0-9]{2}|9855570[0-9]{1}|9855571[0-2])[0-9]{92}|98555713(?:(?:[0-5][0-9]{7}|6[0-5][0-9]{6}|66[0-8][0-9]{5}|669[0-4][0-9]{4}|6695[0-8][0-9]{3}|66959[0-5][0-9]{2}|669596[0-1][0-9]{1}|6695962[0-1])[0-9]{84}|66959622(?:(?:[0-7][0-9]{7}|8[0-3][0-9]{6}|84[0-1][0-9]{5}|842[0-8][0-9]{4}|84290[0-9]{3}|84291[0-3][0-9]{2}|842914[0-7][0-9]{1}|84291480)[0-9]{76}|84291481(?:(?:[0-8][0-9]{7}|9[0-7][0-9]{6}|98[0-5][0-9]{5}|9860[0-7][0-9]{3}|98608[0-2][0-9]{2}|986083[0-3][0-9]{1}|9860834[0-8])[0-9]{68}|98608349(?:(?:[0-2][0-9]{7}|3[0-5][0-9]{6}|36[0-3][0-9]{5}|364[0-6][0-9]{4}|3647[0-4][0-9]{3}|36475[0-1][0-9]{2}|364752[0-8][0-9]{1}|3647529[0-1])[0-9]{60}|36475292(?:(?:[0-6][0-9]{7}|70[0-9]{6}|71[0-8][0-9]{5}|7190[0-6][0-9]{3}|71907[0-3][0-9]{2}|7190740[0-9]{1}|7190741[0-5])[0-9]{52}|71907416(?:(?:[0-7][0-9]{7}|8[0-3][0-9]{6}|84[0-3][0-9]{5}|844[0-3][0-9]{4}|8444[0-2][0-9]{3}|84443[0-5][0-9]{2}|844436[0-4][0-9]{1}|8444365[0-4])[0-9]{44}|84443655(?:(?:0[0-9]{7}|10[0-6][0-9]{5}|1070[0-3][0-9]{3}|10704[0-2][0-9]{2}|107043[0-3][0-9]{1}|1070434[0-1])[0-9]{36}|10704342(?:(?:[0-6][0-9]{7}|70[0-9]{6}|710[0-9]{5}|711[0-4][0-9]{4}|7115[0-4][0-9]{3}|71155[0-8][0-9]{2}|711559[0-5][0-9]{1}|7115596[0-8])[0-9]{28}|71155969(?:(?:[0-8][0-9]{7}|9[0-4][0-9]{6}|950[0-7][0-9]{4}|95080[0-8][0-9]{2}|950809[0-2][0-9]{1})[0-9]{20}|95080930(?:(?:[0-3][0-9]{7}|4[0-1][0-9]{6}|42[0-7][0-9]{5}|428[0-7][0-9]{4}|428800[0-9]{2}|428801[0-6][0-9]{1}|4288017[0-6])[0-9]{12}|42880177(?:(?:[0-8][0-9]{7}|90[0-3][0-9]{5}|9040[0-9]{4}|9041[0-6][0-9]{3}|90417[0-3][0-9]{2}|904174[0-3][0-9]{1}|9041744[0-8])[0-9]{4}|90417449(?:(?:[0-6][0-9]{3}|7[0-6][0-9]{2}|77[0-8][0-9]{1}|7790)|7791))))))))))))))))))))))))))))))))))))))))(?:[^0-9]|$))
message
string

Human-readable explanation of the error. Its wording can vary; use the error code when handling a specific failure.

reason
null | string | number | boolean | Array<any value> | object

Any of the following schemas may apply:

null
string
number
boolean
Array<any value>
Array<any value>
Array item schema
any value
object
object
Additional property schema
any value