General notes for SMS API users

Please note that this documentation is a work-in-progress and is subjected to minor changes based on requests and response bodies.

Visit the following page for the latest updates on Postman's sending service and telco uptime

Non-GSIB laptops

For non-GSIB users please access this page via https://status.postman.gov.sg

GSIB laptops

For GSIB users, please access this page via , do ensure that you add https://safe.menlosecurity.com/ in front of your link.

WOG Training Dates

The training dates below are for using the Postman v2 UI.

This site is for Postman v2, used for sending SMSes with the authorised sender ID only.

1. What are the Postman SLOs?

• It is important to distinguish between the Service Level Objectives (SLOs) for Postman and the overall systems SLOs. Postman, as an integrated component within the larger system, has its own specific SLOs. Postman-specific SLOs focus on the performance, reliability, and efficiency of the Postman product itself. In other words, the Postman team is directly responsible for maintaining and monitoring these product-specific SLOs.

Language tab

If you are sending out messages in other languages, you can select the correct language tab before you key in your message content.

1. Message Content

   • Content in the message body field of each language is not automatically translated.

   • As a user, you will be required to input the correct language text into the message body field.

   • eg. If you select Malay as your language, you should input your message in Malay into the message body field; messages will not be translated for you.

2. SMS Header

   • SMS header will always remain in English.

3. SMS Footer

   • The SMS Footer of each message changes with the language selected.

   • eg. If you select Malay as your language, the SMS footer will change to Malay.

1. My agency is using Amazon Pinpoint SMS. Will there be any integration done for us?

   • No. For systems using Amazon Services, there will be no integration and you will need to switch to using Postman.

2. Can Postman be configured to only send SMSes during whitelisted hours?

   • Postman will send out SMSes once we have received the API call, a scheduling feature is not available.

1. How long will messages take to send if there is a queue?

   • Messages will be sent out once they are received by Postman, this should be completed typically within 10 seconds.

1. Register your desired Sender ID with SGNIC - note that these sender IDs should be used only for internal-facing SMSes.

2. Sign up for a Twilio account

3. Set Up your Twilio account

4. Configure your Twilio account

5. Send a test message on Twilio

6. Fill in your Twilio credentials in your campaign in Postman.

Click on the relevant sub-sections to find the answers to your burning hot questions!

1. Are .csv the only acceptable file types on Postman?

   • Yes, this applies to batches for Postman API and Admin Portal, and for sending messages in bulk via SFTP. We do not accept any other file types.

2. Does Postman support HTML encoding?

   • No, text only.

Message

A message represents a message sent through a campaign.

As each campaign is associated with one message template and has its own API key, you will need to keep track of your API keys if you wish to send messages in different campaigns.

You will not be able to send or retrieve a message in a campaign inaccessible to yourself, even if you know the relevant ID(s).

Government Officers

Email login

If you selected email login, you will need to key in an OTP that is sent to your email address.

Agency users without a gov.sg email domain

The following agencies without a gov.sg email domain can access Postman and are given .

• edu.sg

• synapxe.sg

• aic.sg

The Postman v2 API is organised around REST. Our API has predictable resource-oriented URLs, accepts JSON request bodies, returns JSON response bodies, and uses standard HTTP response codes, authentication, and verbs.

To optimise performance and reliability, Postman v2 has established rate limits and allocations for API endpoints (Rate limits).

https://<POSTMAN_V2_API_BASE_URL>/api/v2

Test Environment Base URL

Production Environment Base URL

Retries a single failed message. The message will retain the same message ID.

The message retry will only go through if:

1. The message latestStatus is failure

2. If the message belongs to a batch, the batch status is either messages_enqueued or messages_enqueuing_failed

After a message is retried, the message latestStatus will be set to created.

The Single Send - Retry feature behaves the same way as the feature.

Note that in your retry endpoint, the messageId remains the same, and is generated from the original request in your .

[Now to 26 Jan 2025] Example response body

[From 24 Feb 2025] The creatorId field will be inserted in the response payload from 24 Feb 2025. Please amend your own code accordingly for

"creatorId": "<USER_ID_OF_MESSAGE_CREATOR>"

1. What is the security and sensitivity classification of Postman?

   Postman can handle up to restricted sensitive-normal data.

2. Can I share the API docs link with my vendors?

   • Yes, you may share this link with your vendors: https://postman-v2.guides.gov.sg/

3. Currently, we do API post with long SMS text content. Our SMS vendor will automatically split the message into several SMS messages to the end user. Is Postman the same?

   • For long message content, it will be combined and will appear as a long message to the user.

4. If Postman is down, will there be a health check endpoint for agencies to check?

   • No, but the team will be considering this point.

5. How do I reach out if I have any issues with my API integration or questions regarding the documents?

   • Please fill up our , we aim to get back to you in 5 working days.

1. We have previously used Postman to send emails to users. Where can we acces the previous site

   • Legacy Postman (Postman v1) with email sending capabilities has migrated to https://legacy.postman.gov.sg or acess the site by clicking Legacy Postman (refer to image below).

   • You may continue using Legacy Postman to send out your email campaigns

   • Legacy Postman is not the same as Postman, for more information, refer to .

What is a message segment?

If a message is over 160 characters long (including header and footer), it gets split into separate message segments. Each message segment includes up to 160 GSM characters, including the header and footer.

How do I calculate message segments?

The Postman team has created a message segment calculator specifically to help ease this calculation process. Use this calculator to count the number of segments in a message and identify any invalid characters.

Using the Postman platform itself to send the SMSes are free.

However, there are 2 other costs that will need to be borne by agencies:

1. Sender ID registration costs (IMDA)

   • This is charged by IMDA for the registration and maintenance of your sender ID, which is a nation-wide regulation.

   • Total costs - one-time set-up fee of $500 per organisation + $200 annually per sender ID.

   • This is charged regardless of which aggregator you use.

   • Read more .

2. Twilio per-SMS costs (Twilio)

   • This is charged by Twilio for each SMS that you send, at USD$0.0415 per message segment of 160 characters to send to recipients with Singapore numbers. Do note that the cost may vary depending on the country code of your recipient's mobile number.

   • Read more .

Retries all failed messages that belongs to a batch. All messages that are retried will retain their original message ID.

The batch retry endpoint will only return a HTTP 201 response if

1. the batch status is messages_enqueued or messages_enqueuing_failed.

Note that batch retry will fail if any of the messages that belongs to the batch has latestStatus of created. In this case, batch status will be set to messages_enqueuing_failed.

The Batch Send - Retry feature behaves the same way as the feature.

Note that in your retry endpoint, the batchId remains the same, and is generated from the original request in your .

To complete your set up, you will need to

Sends multiple messages in a single API request.

You will need to prepare a CSV file where, in addition to recipient and language, each column represents a value to the campaign’s template parameter.

You will then need to upload this file to this endpoint.

To upload your file, send a multipart/form-data request to this endpoint.

1. Generate your keys via this command

1. This generates 2 files, a private key file and a public key file

Key information

1. The default rate limit is 10 TPS per campaign ID.

   -> This is defined as the number of API calls per second and not the number of messages sent per second.

1. How can I obtain my API keys earlier for testing?

   • You can now obtain your API keys on . Read for more information on calling Postman’s SMS API.

2. When can agencies test out the Postman API endpoints?

Phone number purchase is necessary if you are sending SMSes to foreign numbers. Follow the steps here to purchase a number.

How to buy a phone number?

In the campaign dashboard, there are 2 categories:

1. Will specific error codes be shown for SMS failures?

   • Yes, it will be in the delivery report that can be downloaded for each campaign. This will come in the form of a CSV file all messages ever sent for the batch or campaign. You should filter for the desired month within the CSV file itself.

2. How long will campaign logs be retained for?

1. Does my institution have access to Postman to send messages to MOPs?

   • You may check for the list of organisations/institutions that can use Postman to send messages to MOPs .

   • If your organisation/institution is excluded, you will not have access to use Postman.

1. Can campaigns be edited after creation?

   • No, they cannot be edited.

     If you need to edit your campaign’s message body, you will be required to create a new campaign.

     Users are now testing out campaigns on our test platform, and will have a fresh dashboard when they onboard onto our production site.

1. What do the different message statuses on my Postman dashboard mean?

   • Please see the list of available statuses . Do note that telcos do not provide read statuses.

2. What's the typical and max time for a message latestStatus to move from

Send a test message on Twilio

Note that this step is done in Twilio, not Postman, yet.

Navigate back to the console and under Try it out, select Send an SMS. Insert your own phone number and select the messaging service that you set up earlier in step 4.

Type your message and click send to check if you receive the SMS and if the Sender ID is accurate.

If you encounter an error with sending a test SMS, it is likely that the Sender ID has yet to be mapped to Twilio. You may reach out to us so that we can link you up with our Twilio account manager.

1. What is Postman’s IP address?

   • We do not provide our IP address, you can whitelist our domain name. If you really need our IP address, you can resolve the domain to find the IP address, but you will be responsible for updating it if it changes.

2. Does Postman allow me to bulk upload our IP addresses?

Postman v2 connects with Twilio to send out messages within the agency.

What is the difference between Twilio and Postman?

Postman is a free multi-channel communications platform built by Open Government Products for all public service agencies. Postman provides a convenient interface for you to craft your message, upload your recipient list, and send your campaign. Using Postman itself is free.

Twilio is a commercial cloud communication service that allows users to send messages (including SMS) through an Application Program Interface (API). Twilio bills users directly for its services; in this case, any SMSes you send using the Postman interface will be billed to you directly by Twilio. Postman does not pay for the SMSes that you send, but neither does Postman charge you for sending SMSes using our interface.

Why Twilio?

We evaluated other cloud-based SMS service providers like Nexmo and AWS SNS before we chose Twilio. We chose Twilio for its simple user interface with an interactive debugger. Its API documentation is also well written, and its API easy to set up. The API also optimises the rate limit to send bulk messages, and allow for users to retry for messages with errors during the first attempted delivery.

Importantly, Twilio API's success rate is 99.999% & uptime is around 99.95% monthly.

Since inception, we have used Twilio for SMS sending services, such as NDP ticketing, Digital MCs, SGH's elective surgery appointment reminders, and quarantine ops by MOH and ICA during Covid-19.

Can I trial using Postman to send SMSes before deciding whether to onboard onto Twilio?

Unlike Postman Legacy, Postman v2 does not offer users accounts with free demo campaigns.

You will need to have valid Twilio credentials, put them in Postman, and use this to send SMSes. You can send test SMSes to your own phone number, but this will be charged to your Twilio account directly.

Upon completion of the SFTP integration, we will furnish you with the ipAddress for the SFTP server. Users will use their campaignId as their username to access the server.

A connection to our SFTP server can be established by executing the following command:

sftp -i <user's ssh private key> campaignId@sftpServerDomain

Billing and Costs

Twilio works on a pre-payment method - you will need to top up your account with credits before SMSes can be sent. can be set so that you don't have to manually top up these credits.

Billing is generally done using a corporate credit card. Read more about Twilio's billing methods .

If you are unable to obtain a corporate credit card, you can explore direct invoicing with Twilio. However, Twilio requires a minimum spend of US12,000 annual (or about 25,000 SMSes per month) to qualify for this mode of payment.

What is the cost?

At this point of writing (March 2024), it costs USD$0.0415 per message segment of 160 characters to send to recipients with Singapore numbers. If your message is longer than 160 characters, you will be charged the cost of as many message segments.

You may refer to Twilio's for the latest rates. You will be charged the cost according to the destination handset i.e. you will be charged the US rate for sending to a US number, even if the recipient with this number is based in Singapore.

Successful upload of file to Postman via SFTP

Users will be notified via email upon successful uploads of their file to Postman via SFTP.

Messages that have failed to be uploaded to Postman via SFTP

Users will be notified via email for all failed file uploads to Postman via SFTP

All emails for failed file uploads will come with a URL to download your file with an additional column, Error Reason .

This allows you to identify errors in your file to rectify before re-uploading the file.

When to contact the Postman team?

If the email notification you receive comes with a support ID informing you to contact us, do fill up our for us to get in touch with you.

Message Status

Successful upload of your file to Postman does not mean that your message was successfully sent to the recipient. You will still need to check for the .

To check the statuses of your messages, please refer to the admin portal.

Other useful information

1. If your SFTP file is not processed due to an error, the relevant SMS messages will not be created in the Postman server, and thus will not be reflected in that particular campaign.

2. You will receive an email response per file upload, to the email address which you specified in your SFTP form submission. This email will inform you if the messages were a success or failure.

3. You will only be able to specify 1 email address per SFTP form submission.

Now that you've decided to use Postman for your internal SMS campaigns, first ensure your desired Sender ID is registered under the Full SSIR Regime.

As part of national scam prevention efforts to filter out non-legitimate SMSes to citizens, IMDA has necessitated the registration of SMS Sender IDs for all organisations in Singapore on the SMS Sender ID Registry (SSIR), including public agencies, from 31 January 2023. You can read more about this new policy here. The Sender ID refers to the name that you see at the top of an SMS sent to you by an officially-registered organisation.

Some large agencies might already have registered their Sender IDs. This is especially the case for generic agency-name Sender IDs like MSF or MTI. If you are unsure if the Sender ID you would like to use has already been registered by your agency, please do check internally before submitting your registration.

How do I register for a Sender ID?

You will need to register via the SSIR portal . Approval will take a few days as the Singapore Network Information Centre (SGNIC) - a wholly-owned subsidiary of IMDA - will need to conduct specific name and homoglyphic checks on your desired Sender ID. More information on Sender IDs and fees imposed by IMDA .

To send messages in bulk, you must prepare a CSV file where each column, in addition to recipient and language, represents a value corresponding to the campaign’s template parameter.

The examples below is based on the following campaign template:

An example CSV file for the above template can be found below, along with an explanation of the various fields in the file.

CSV file fields

recipient string (Mandatory field)

For messages sent through the sms channel, the recipient will be the mobile phone number of the recipient, together with the country code of the recipient without including + in front.

eg. 6591234567 is a recipient string for a Singapore (65) phone number (91234567)

language string (Mandatory field)

This is the language of the message template used to send this message.

This are the possible values english, chinese, malay, or tamil.

recipient_name string (Optional field - depending on your message template content)

topic string (Optional field - depending on your message template content)

Subsequently, you will need to upload this file using the following command:

Please be aware that our system does not generate output files. The result of a file upload will be communicated to you via email.

Checklist for PICs

• Ensure that all of your agency users are aware that Postman SMS will be charged from 1 July 2025

• Ensure that the agency payment information form is filled up before November 2025

• Ensure that internal agency budget is set aside for Postman SMS usage

• Assist campaign creators in raising any discrepancies for monthly billing reports if required

• Understand what kind of message statuses are chargeable .

Checklist for Campaign Creators

• Ensure that you are the right owner for campaigns as SMSes will be billed to your agency

• When creating a new campaign, ensure that content in the message template does not contain invalid characters. Use the to verify.

• When sending messages, ensure that content within message parameters are valid as invalid messages will still be billed to your agency (as explained in our ).

• When sending messages, ensure that the recipients numbers are valid as invalid numbers will still be billed to your agency in accordance with our message charges (as explained in our ).

Checklist for Campaign Members

• Ensure that your campaign creator is set correctly. All SMSes will be billed to the campaign creators' agency

• Remind campaign creators and admins on billing requirements

• When sending messages within your campaigns, also ensure that content within message parameters are valid. Use the to verify.

Retrieves a single message and its delivery status.

[Now to 23 Feb 2025] Example response body

[From 24 Feb 2025] The creatorId field will be inserted in the response payload from 24 Feb 2025. Please amend your own code accordingly for

"creatorId": "<USER_ID_OF_MESSAGE_CREATOR>"

We are using a Cursor-based pagination, a method of pagination that uses a unique identifier (cursor) to keep track of the current position in the dataset.

Here's a general overview of how it works:

1. Usage: The Retrieve Batch API takes in parameters such as limit, search ,before, and after to control the pagination.

2. Cursor: The before and after parameters are used to specify the cursor for fetching the previous or next page of results. The cursor typically represents the position of a specific record in the dataset.

3. Sorting: The data is sorted by the createdAt followed by id

4. Result: The response returns the paginated results along with cursors for the next and previous pages, allowing for easy navigation through the dataset.

For example:

1. hasNextPage tells you if there's a next page in the queried data object

   1. To go to the next page, you can use the after Query Parameter with the current page's endCursor value.

List of Apis that has pagination

The Postman v2 API uses conventional HTTP response codes to indicate the success or failure of an API request. In general: Codes in the 2xx range indicate success. Codes in the 4xx range indicate a request that failed given the information provided (e.g., a required parameter was omitted, not having access to the campaign due to wrong API key, etc.). Codes in the 5xx range indicate an error with Postman’s servers (these will be rare).

Some 4xx errors that could be handled programmatically include an error code that briefly explains the error reported.

Attributes

message string

A human-readable message providing more details about the error.

statusCode number

The HTTP status code of the error.

HTTP status code summary

The Postman v2 API uses API keys and static IP whitelisting to authenticate incoming requests from your server.

Your API keys carry many privileges, so be sure to keep them secure. Don't share your secret API keys in publicly accessible areas such as GitHub, client-side code, and so forth.

Authentication to the API is performed with HTTP Bearer Auth.

curl https://<POSTMAN_V2_API_BASE_URL>/api/v2/campaigns/:campaignId/messages -H "Authorization: Bearer YOUR_API_KEY"

You must make all API calls over . Calls that you make over plain HTTP will fail. API requests without authentication will also fail.

If you make a request without authentication, you will receive HTTP 401 and the following in your response body:

1. I heard that Postman will have SFTP integration. Are the documents ready?

   • Please access our SFTP documents here.

   • The SFTP onboarding process flow is documented here.

2. When can I test out SFTP integration?

   • Submit the SFTP interest to get started.

3. Are there plans to provide SMPP to Postman integration?

   • We are still consolidating agencies’ use cases and will inform agencies at a later date if this will be provided. If you have yet to provide your SMPP use case, fill up our request form .

4. Are there plans to provide SMTP to Postman integration?

   • No.

5. Are there plans to provide SMTP to Postman integration?

   • No.

6. Can we send encrypted files via SFTP?

   • No, the files need to be in csv format

7. For SFTP, when will the SMSes be sent and when should the files be deposited?

   • They are sent out in real time upon Postman receiving the files from agencies.

8. What if the test environment cannot handle my production load

   • You should not be using postman to conduct load testing. Please refer to for more information.

9. Will load testing be available on Postman test and production sites?

   • Load testing on Postman will only be available a separate site, not the test site. Please refer to for more information.

   • You will need to complete load testing on your own system’s end, to ensure that your system is able to handle the load you will be sending over to our end.

   • Please also ensure that you are using the correct method to send your messages (single send vs batch send), as you may receive a

You will be able to obtain your campaign API keys and whitelist your IP address from your campaign's settings pop-up, under the integrations tab. This part will be accessible after you have and saved your campaign.

Click on your campaign and the settings icon, this will open up your settings pop-up.

General FAQs

How much will messages cost?

Only messages sent out from Postman's production environment will be charged.

The below pricing is independent of where the recipient is located (i.e. local number pricing will still apply to recipients who are overseas but own Singapore numbers).

All charges are subject to GST which will be applied in the invoice.

1. Will there be a monthly report with a CSV file containing all the SMS sent for the month? Will it be emailed to us?

   • The delivery report can be downloaded directly from Postman by the user. This will come in the form of a CSV file all messages ever sent for the batch or campaign. You should filter for the desired month within the CSV file itself.

     The is applicable for both admin portal and API users.

     Additionally, API users can also call the to retrieve message status in real time.

1. How do we know what is the campaignID ?

   • Refer to our for more information.

2. How can I obtain my API keys earlier for testing?

SFTP integration for campaigns is exclusively available on an opt-in basis and is not accessible through the admin portal.

• For questions related to SFTP, you may submit your inquiries .

• For agencies interested to use SFTP, follow the steps below, then submit this .

Load test requirement:

To conduct a TPS load test for your system:

• Postman supports a maximum throughput of 200 TPS for load test environment only

What can be done on the billing dashboard?

1. I do not have campaign creation access. Who should I contact?

   • Reach out to your agency PIC(s) to request for campaign create access. Refer to our for more information.

2. How can I add new agency administrators to Postman?

To start sending out messages, select the campaign that you wish to use. This will take you to the campaign dashboard page. You may choose to send to a single recipient or multiple recipients

Single recipient

Upon selecting single recipient, a pop-up will prompt you to key in your recipient's details.

• Recipient's phone number

• Message language*

• Message parameters

Once the details have been filled in, click send to send out your message.

Formatting a single message

You may start entering fields into your message parameters.

Should there be a need to add commas or quotation marks in your message parameters, you may enter them in your message parameters.

Multiple recipients

Upon selecting multiple recipients, you will be prompted to upload a .csv file containing

• message parameters

We highly recommend the following steps when formatting your .csv file to send out messages

1. Download campaign .csv template

2. Edit the .csv template and save it as a .csv file

3. Upload your .csv file

In the multiple recipients sending format, any errors in the CSV file rows will result in failure to upload your file. You will need to fix the error(s) before all messages in the batch before you are able to successfully upload your file.

The header row will require to match the created, such as containing lowercase letters, numbers and _.

Recipient

This contains mobile phone number of the recipient, prefixed by the country code but without the leading +. For example, when sending to a Singapore phone number, the value of recipient will be 6599999999.

eg. 6591234567 is a recipient string for a Singapore (65) phone number (91234567)

Language

This column will need to be filled, even if there is only one available language that can be selected.

eg. If English is the only language you can choose in your message creation, you will need to fill every single entry with English.

Formatting messages to multiple recipients

You may start entering fields into each message parameter in your csv file.

Formatting in Excel

Excel: Commas and quotation marks

Should there be a need to add commas or quotation marks in your message parameters, you may enter them in each cell within your excel file.

Excel: Line Breaks

Should there be a need for line breaks, you may add them in a single cell

Formatting in text editor

Text Editor: Commas, line breaks, quotation marks

When formatting your messages in a text editor,

1. Ensure that all parameters are separated by commas

1. Should your content contain more than just letters, please encase them in quotations, see example above

   • Parameter containing more than just letters - highlighted in blue

2. Should your message content contain line breaks, please add the line breaks in your parameters within quotations, see image "Example csv in text editor".

1. Should your content contain quotation, encase the entire quote, including the quotation marks, within a set of quotations, see image "Example csv in text editor".

   • quote - highlighted in yellow

   • quotations used to encase quote - highlighted in pink

These steps will ensure that messages sent out can contain commas and quotation marks.

Postman Test Site: limitations

Postman's test site is meant for agency users to test out the platform. As such, you should test out the site like how you would send out messages to MOPs in a real scenario, where each number will only receive a single message.

If you send test messages with exact same content to the same person multiple times in 1 sitting in the same campaign:

eg. "Hi your appointment is on 1 Jan 2024" was sent to Tom 10 times within 1 batch send,

The telcos' automatic spam filter may be triggered . This means the message may not be delivered to Tom's phone at all, even though it will pass Postman’s send filters and status is reflected as delivered. See screenshot below on how the batch .csv is formatted in this failed example.

The keys within the values object will vary depending on the campaign’s template parameters. To find out what the parameters for a template are, please refer to the template’s details in Postman’s web interface.

[Now to 26 Jan 2025] Example response body

[From 24 Feb 2025] The creatorId field will be inserted in the response payload from 24 Feb 2025. Please amend your own code accordingly for

"creatorId": "<USER_ID_OF_MESSAGE_CREATOR>"

Postman allows a maximum of 1000 characters for a message body, excluding the header (agency’s name) and footer.

Agencies are strongly encouraged to limit their message body to 320 characters (excluding the header and footer) to avoid potential delays with message deliverability. As a precautionary measure, a warning message will appear for messages beyond 320 characters.

If the message body exceeds 1000 characters, the system will disable the ability to send the message. Message parameters, such as {{variable}} are not counted as characters. However, when these parameters are populated with actual values, the character count of the populated value is added to the overall character count.

For example:

• Message variable placeholder {{name}} is not included in the character count when crafting the message template.

1. For 5XX server errors, will the requests be queued on Postman’s side?

   • No.

2. Regarding Send messages in Bulk, are there any limits on the number of messages that can be sent or on the file size?

1. When will my agency be able to test out your new Platform?

   • The test platform is now live at

     You can test out the following integration modes now: Admin Portal, API, SFTP

   • Load testing is not available for now, please refer to for more information.

Message Preview

This is how your message will look like:

Header

Retrieves messages and their delivery statuses given a batch ID. Please refer to this table in possible message statuses and what they mean on what each message status means.

Supported Query Parameters

limit string (Mandatory)

You can specify the number of messages to return per page using the limit query parameter. The minimum value is 1, and the maximum value is 1000.

after string (Optional)

Find messages after the cursorId

before string (Optional)

Find messages before the cursorId

search string (Optional)

This supports searching by recipient phone number only.

It is a substring match, eg. a "11" would match with "91122233"

[Now to 26 Jan 2025] Example response body

[From 24 Feb 2025] The creatorId field will be inserted in the response payload for each message object from 24 Feb 2025. In this above example it will be inserted once per message object i.e. total of 3 times. Please amend your own code accordingly for

"creatorId": "<USER_ID_OF_MESSAGE_CREATOR>"

Before calling Postman's API endpoints, please ensure

1. You are connected to the .

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