# Postman v2 Guide

## Postman v2 Guide

- [What is Postman SMS?](https://postman-v2.guides.gov.sg/about/what-is-postman-sms.md)
- [Service Level Objectives (SLOs)](https://postman-v2.guides.gov.sg/about/service-level-objectives-slos.md)
- [Service status](https://postman-v2.guides.gov.sg/about/service-status.md)
- [Log in to postman.gov.sg](https://postman-v2.guides.gov.sg/general-users-ui-portal/log-in-to-postman.gov.sg.md)
- [Request for campaign creation rights from agency PICs](https://postman-v2.guides.gov.sg/general-users-ui-portal/request-for-campaign-creation-rights-from-agency-pics.md)
- [Create a campaign](https://postman-v2.guides.gov.sg/general-users-ui-portal/create-a-campaign.md)
- [Send messages](https://postman-v2.guides.gov.sg/general-users-ui-portal/send-messages.md)
- [Check message delivery status](https://postman-v2.guides.gov.sg/general-users-ui-portal/check-message-delivery-status.md)
- [Campaign settings](https://postman-v2.guides.gov.sg/general-users-ui-portal/campaign-settings.md)
- [About your campaign](https://postman-v2.guides.gov.sg/general-users-ui-portal/campaign-settings/about-your-campaign.md)
- [Manage campaign members](https://postman-v2.guides.gov.sg/general-users-ui-portal/campaign-settings/manage-campaign-members.md)
- [Manage integrations](https://postman-v2.guides.gov.sg/general-users-ui-portal/campaign-settings/manage-integrations.md)
- [Delete your campaign](https://postman-v2.guides.gov.sg/general-users-ui-portal/campaign-settings/delete-your-campaign.md)
- [FAQs (UI Portal)](https://postman-v2.guides.gov.sg/general-users-ui-portal/faqs-ui-portal.md)
- [Log in to postman.gov.sg](https://postman-v2.guides.gov.sg/technical-users-api/log-in-to-postman.gov.sg.md)
- [Request for campaign creation rights from agency PICs](https://postman-v2.guides.gov.sg/technical-users-api/request-for-campaign-creation-rights-from-agency-pics.md)
- [Create a campaign](https://postman-v2.guides.gov.sg/technical-users-api/create-a-campaign.md)
- [Whitelist your public IP address](https://postman-v2.guides.gov.sg/technical-users-api/whitelist-your-public-ip-address.md)
- [Generate your API key](https://postman-v2.guides.gov.sg/technical-users-api/generate-your-api-key.md)
- [Send SMSes using our API](https://postman-v2.guides.gov.sg/technical-users-api/send-smses-using-our-api.md)
- [API Reference](https://postman-v2.guides.gov.sg/technical-users-api/api-reference.md)
- [Authentication](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/authentication.md)
- [Rate limits](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/rate-limits.md)
- [Message statuses](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/message-statuses.md)
- [API errors](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/api-errors.md)
- [The message object](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/the-message-object.md)
- [POST - Single send](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/post-single-send.md)
- [POST - Retry single send](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/post-retry-single-send.md)
- [GET - Retrieve a single message](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/get-retrieve-a-single-message.md)
- [POST - Batch send](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/post-batch-send.md)
- [POST - Retry batch send](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/post-retry-batch-send.md)
- [GET - Retrieve batch messages](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/get-retrieve-batch-messages.md)
- [GET - Retrieve all campaign messages](https://postman-v2.guides.gov.sg/technical-users-api/api-reference/get-retrieve-all-campaign-messages.md)
- [Optional load testing](https://postman-v2.guides.gov.sg/technical-users-api/optional-load-testing.md)
- [FAQs (API)](https://postman-v2.guides.gov.sg/technical-users-api/faqs-api.md)
- [What are legacy integrations](https://postman-v2.guides.gov.sg/legacy-integrations/what-are-legacy-integrations.md)
- [FAQs (SFTP, Postman NRIC)](https://postman-v2.guides.gov.sg/legacy-integrations/faqs-sftp-postman-nric.md)
- [Billing Overview](https://postman-v2.guides.gov.sg/billing/billing-overview.md)
- [Detailed charges and pricing](https://postman-v2.guides.gov.sg/billing/detailed-charges-and-pricing.md)
- [How to use the billing dashboard](https://postman-v2.guides.gov.sg/billing/how-to-use-the-billing-dashboard.md)
- [Message segment calculator](https://postman-v2.guides.gov.sg/billing/message-segment-calculator.md)
- [Billing checklist](https://postman-v2.guides.gov.sg/billing/billing-checklist.md)
- [FAQs (Billing)](https://postman-v2.guides.gov.sg/billing/faqs-billing.md)
- [How do I find help](https://postman-v2.guides.gov.sg/support/how-do-i-find-help.md)
- [Useful links](https://postman-v2.guides.gov.sg/references/useful-links.md)
- [Terms & Conditions](https://postman-v2.guides.gov.sg/legal/terms-and-conditions.md)
- [Privacy Policy](https://postman-v2.guides.gov.sg/legal/privacy-policy.md)
- [About Postman v2](https://postman-v2.guides.gov.sg/postman-v2-api-docs/about-postman-v2.md): Read this guide for integration and/or testing information with Postman v2. You will need to use Postman v2 for sending SMSes to external recipients using the authorised sender ID.
- [Postman v2 SLOs](https://postman-v2.guides.gov.sg/postman-v2-api-docs/about-postman-v2/postman-v2-slos.md): SLOs are Service Level Objectives, which provide you with insight on the goals and objectives that the Postman product holds itself to.
- [Postman v2 SMS API user documentation](https://postman-v2.guides.gov.sg/postman-v2-api-docs/postman-v2-sms-api-user-documentation.md)
- [Service Status](https://postman-v2.guides.gov.sg/postman-v2-api-docs/service-status.md)
- [Postman Guide latest updates](https://postman-v2.guides.gov.sg/postman-v2-api-docs/postman-guide-latest-updates.md): Latest updates made to this document
- [Important dates](https://postman-v2.guides.gov.sg/postman-v2-api-docs/important-dates.md)
- [Useful Links](https://postman-v2.guides.gov.sg/postman-v2-api-docs/useful-links.md)
- [Billing Overview](https://postman-v2.guides.gov.sg/postman-v2-pricing-from-1-july-2025/billing-overview.md)
- [Message segment calculator](https://postman-v2.guides.gov.sg/postman-v2-pricing-from-1-july-2025/billing-overview/message-segment-calculator.md)
- [Detailed charges and pricing](https://postman-v2.guides.gov.sg/postman-v2-pricing-from-1-july-2025/billing-overview/detailed-charges-and-pricing.md)
- [Billing checklist](https://postman-v2.guides.gov.sg/postman-v2-pricing-from-1-july-2025/billing-overview/billing-checklist.md)
- [How to use the billing dashboard](https://postman-v2.guides.gov.sg/postman-v2-pricing-from-1-july-2025/billing-overview/how-to-use-the-billing-dashboard.md)
- [FAQs on billing](https://postman-v2.guides.gov.sg/postman-v2-pricing-from-1-july-2025/billing-overview/faqs-on-billing.md)
- [Logging into Postman v2](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/logging-into-postman-v2.md): Login method for both admin portal users and API users are the same.
- [Create Campaign](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/create-campaign.md): How do I start creating a campaign?
- [Message Preview](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/create-campaign/message-preview.md)
- [Language tab](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/create-campaign/language-tab.md)
- [Message content](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/create-campaign/message-content.md)
- [Character count](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/create-campaign/character-count.md): Visit https://message-segment-calculator.postman.gov.sg for message segment and character counts
- [Message Logs](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/message-logs.md): How do I download message logs for my campaign?
- [Deleting campaigns](https://postman-v2.guides.gov.sg/postman-v2-general-user-guide-mop/deleting-campaigns.md): How do I delete campaigns?
- [Sending messages via the Admin Portal](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-mop/sending-messages-via-the-admin-portal.md): How do I use the admin portal (Postman UI) to send out messages?
- [Campaign Settings](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-api-users-mop/campaign-settings.md): How do I whitelist my IP address and obtain my API keys?
- [Sending Messages via Postman API](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-api-users-mop/sending-messages-via-postman-api.md): How do I send out messages if I want to call Postman's API Endpoints
- [Sending SMSes using NRIC](https://postman-v2.guides.gov.sg/sending-smses-using-nric.md): The Postman team will release the API specs and test environment for this feature after April 20, 2025.
- [Internal SMS](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/internal-sms.md): Postman's internal SMS set up is exactly the same as Postman Legacy SMS set up
- [Information for new Twilio users](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/information-for-new-twilio-users.md): This information is meant for users who are only sending out messages to an internal/non-MOP audience.
- [Summary of Costs](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/summary-of-costs.md): The details on this page pertain ONLY to messages sent using agencies' own sender IDs, to an internal/non-MOP audience. For details on MOP-facing SMSes, refer to the billing overview page.
- [How do I onboard Postman v2 Internal SMS](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms.md): Unlike Postman V1 (Legacy Postman), agencies will no longer need to submit the SMS onboarding form. Please directly apply for an account with Twilio.
- [1. Sender ID Registration](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms/1.-sender-id-registration.md): Note: for internal-facing SMSes only.
- [2. Sign up for a Twilio account](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms/2.-sign-up-for-a-twilio-account.md): How do I get started with Twilio?
- [3. Set up your Twilio account](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms/3.-set-up-your-twilio-account.md): Log into Twilio to set up your profile and billing details.
- [4. Fill your Twilio credentials on Postman](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms/4.-fill-your-twilio-credentials-on-postman.md)
- [What if I need to buy a phone number?](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms/4.-fill-your-twilio-credentials-on-postman/what-if-i-need-to-buy-a-phone-number.md)
- [5. Send a Test Message](https://postman-v2.guides.gov.sg/postman-v2-admin-portal-for-ui-users-internal/how-do-i-onboard-postman-v2-internal-sms/5.-send-a-test-message.md)
- [Overview](https://postman-v2.guides.gov.sg/general-notes-for-api-users/overview.md)
- [Authentication](https://postman-v2.guides.gov.sg/general-notes-for-api-users/authentication.md)
- [API Errors](https://postman-v2.guides.gov.sg/general-notes-for-api-users/api-errors.md)
- [Message Delivery Errors](https://postman-v2.guides.gov.sg/general-notes-for-api-users/message-delivery-errors.md): Each error type is mapped to its corresponding code, as returned by the system, to diagnose delivery failures.
- [Pagination](https://postman-v2.guides.gov.sg/general-notes-for-api-users/pagination.md)
- [Rate Limits](https://postman-v2.guides.gov.sg/general-notes-for-api-users/rate-limits.md): This page will answer your questions on rate limits imposed on agency campaigns. This applies to all agencies.
- [Endpoints for API users](https://postman-v2.guides.gov.sg/endpoints-for-api-users/endpoints-for-api-users.md)
- [The message object](https://postman-v2.guides.gov.sg/endpoints-for-api-users/the-message-object.md)
- [Single Send](https://postman-v2.guides.gov.sg/endpoints-for-api-users/single-send.md)
- [Single Send - Retry](https://postman-v2.guides.gov.sg/endpoints-for-api-users/single-send-retry.md)
- [Retrieve Message](https://postman-v2.guides.gov.sg/endpoints-for-api-users/retrieve-message.md)
- [Batch Send](https://postman-v2.guides.gov.sg/endpoints-for-api-users/batch-send.md)
- [Batch Send - Retry](https://postman-v2.guides.gov.sg/endpoints-for-api-users/batch-send-retry.md)
- [Retrieve Batch](https://postman-v2.guides.gov.sg/endpoints-for-api-users/retrieve-batch.md)
- [Retrieve Campaign Message](https://postman-v2.guides.gov.sg/endpoints-for-api-users/retrieve-campaign-message.md)
- [SFTP Integration](https://postman-v2.guides.gov.sg/sftp/sftp-integration.md)
- [Generating SSH Keys](https://postman-v2.guides.gov.sg/sftp/generating-ssh-keys.md): How to generate your SSH keys
- [Connecting to the SFTP server](https://postman-v2.guides.gov.sg/sftp/connecting-to-the-sftp-server.md)
- [Sending messages via SFTP](https://postman-v2.guides.gov.sg/sftp/sending-messages-via-sftp.md)
- [Checking whether sending via SFTP is successful](https://postman-v2.guides.gov.sg/sftp/checking-whether-sending-via-sftp-is-successful.md)
- [Postman v2 FAQ](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq.md): We update this page regularly, please refer to API Documents latest updates for the last updated date.
- [General Q\&A](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/general-q-and-a.md)
- [Sending emails to users (Legacy Postman)](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/sending-emails-to-users-legacy-postman.md)
- [Access related inquiries](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/access-related-inquiries.md)
- [Platform access related inquiries](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/platform-access-related-inquiries.md)
- [User Access](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/user-access.md)
- [API keys generation and IP Address whitelisting](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/api-keys-generation-and-ip-address-whitelisting.md)
- [Delivery Report](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/delivery-report.md)
- [Messaging](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/messaging.md)
- [Message Statuses](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/message-statuses.md)
- [Integration and configuration related inquiries](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/integration-and-configuration-related-inquiries.md)
- [Delivery rate](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/delivery-rate.md)
- [File types](https://postman-v2.guides.gov.sg/faq/postman-v2-sms-api-faq/file-types.md)
- [Postman v2 API FAQ](https://postman-v2.guides.gov.sg/faq/postman-v2-api-faq.md)
- [API keys generation](https://postman-v2.guides.gov.sg/faq/postman-v2-api-faq/api-keys-generation.md)
- [Campaign related inquiries](https://postman-v2.guides.gov.sg/faq/postman-v2-api-faq/campaign-related-inquiries.md)
- [API related inquiries](https://postman-v2.guides.gov.sg/faq/postman-v2-api-faq/api-related-inquiries.md)
- [IP Address related inquiries](https://postman-v2.guides.gov.sg/faq/postman-v2-api-faq/ip-address-related-inquiries.md)
- [SFTP and Other integration methods](https://postman-v2.guides.gov.sg/faq/sftp-and-other-integration-methods.md)
- [Terms & Condition](https://postman-v2.guides.gov.sg/call-app/terms-and-condition.md)
- [Privacy Policy](https://postman-v2.guides.gov.sg/call-app/privacy-policy.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on a page URL with the `ask` query parameter:
```
GET https://postman-v2.guides.gov.sg/about/what-is-postman-sms.md?ask=<question>
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.