> For the complete documentation index, see [llms.txt](https://doc.opentact.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.opentact.org/opentact-api-documentation.md).

# Opentact API Documentation

- [Opentact API Integration](https://doc.opentact.org/opentact-api-documentation/overview.md): Overview
- [API Environment](https://doc.opentact.org/opentact-api-documentation/overview/api-environment.md)
- [Opentact API keys](https://doc.opentact.org/opentact-api-documentation/overview/obtain-your-api-keys.md)
- [Passing Authentication](https://doc.opentact.org/opentact-api-documentation/overview/passing-authentication.md)
- [Authentication API](https://doc.opentact.org/opentact-api-documentation/overview/authentication-api.md)
- [Example API Call](https://doc.opentact.org/opentact-api-documentation/overview/authentication-api/example-api-call.md)
- [Authentiction with Gmail](https://doc.opentact.org/opentact-api-documentation/overview/authentication-api/authentiction-with-gmail.md)
- [TN Profile](https://doc.opentact.org/opentact-api-documentation/tn-profile.md): TN Profile: Streamlining Configuration for Phone Numbers
- [Add and Remove Blacklist to TN Profile](https://doc.opentact.org/opentact-api-documentation/tn-profile/add-blacklist-to-tn-profile.md): TN Profile: Efficiently Manage Blocked Numbers
- [Example API Call](https://doc.opentact.org/opentact-api-documentation/tn-profile/add-blacklist-to-tn-profile/example-api-call.md)
- [Add and Remove Whitelist to TN Profile](https://doc.opentact.org/opentact-api-documentation/tn-profile/add-whitelist-to-tn-profile.md): Whitelist for TN Profile: Control Authorized Callers
- [Example API Call](https://doc.opentact.org/opentact-api-documentation/tn-profile/add-whitelist-to-tn-profile/example-api-call.md)
- [Phone Number](https://doc.opentact.org/opentact-api-documentation/phone-number.md): Number API: Tailor Your Telephony Experience
- [Order Phone Number](https://doc.opentact.org/opentact-api-documentation/phone-number/order-phone-number.md)
- [Example API Usage](https://doc.opentact.org/opentact-api-documentation/phone-number/order-phone-number/set-up-a-sip-connection.md)
- [Release a Number](https://doc.opentact.org/opentact-api-documentation/phone-number/remove-number-from-a-call-app.md)
- [Example API Usage](https://doc.opentact.org/opentact-api-documentation/phone-number/remove-number-from-a-call-app/release-number.md)
- [Get all Purchased Numbers](https://doc.opentact.org/opentact-api-documentation/phone-number/get-all-numbers.md)
- [Number Search](https://doc.opentact.org/opentact-api-documentation/phone-number/number-search.md)
- [Example API Usage](https://doc.opentact.org/opentact-api-documentation/phone-number/number-search/set-up-a-phone-number.md): Effortlessly Explore Numbers Based on Your Criteria
- [SIP Connection](https://doc.opentact.org/opentact-api-documentation/sip-connection.md): SIP Connection: Tailoring Your Outbound Call Trunks
- [Remove Number from SIP Connection](https://doc.opentact.org/opentact-api-documentation/sip-connection/delete-number-for-a-sip-connection.md)
- [Get Number for a SIP Connection](https://doc.opentact.org/opentact-api-documentation/sip-connection/get-number-for-a-sip-connection.md)
- [Update SIP Connections](https://doc.opentact.org/opentact-api-documentation/sip-connection/update-sip-connections.md)
- [Create SIP Conenctions](https://doc.opentact.org/opentact-api-documentation/sip-connection/create-sip-conenctions.md)
- [Delete SIP Connections](https://doc.opentact.org/opentact-api-documentation/sip-connection/delete-sip-connections.md)
- [List SIP Connections](https://doc.opentact.org/opentact-api-documentation/sip-connection/list-sip-connections.md)
- [Assign Number to a SIP Connection](https://doc.opentact.org/opentact-api-documentation/sip-connection/update-number-for-a-sip-connection.md)
- [Messaging](https://doc.opentact.org/opentact-api-documentation/untitled-3.md)
- [Enable SMS on Numbers](https://doc.opentact.org/opentact-api-documentation/untitled-3/sms-enabled-numbers.md)
- [Disable SMS on Number](https://doc.opentact.org/opentact-api-documentation/untitled-3/disable-sms-on-number.md)
- [Send SMS with Pool](https://doc.opentact.org/opentact-api-documentation/untitled-3/send-a-message-using-number-pool.md)
- [Send SMS with Number](https://doc.opentact.org/opentact-api-documentation/untitled-3/send-a-message.md)
- [Receiving SMS](https://doc.opentact.org/opentact-api-documentation/untitled-3/receiving-sms.md)
- [Retrieve Message Detail Records](https://doc.opentact.org/opentact-api-documentation/untitled-3/retrieve-message-detail-records.md)
- [Receiving Messaging Events](https://doc.opentact.org/opentact-api-documentation/untitled-3/receiving-webhooks-with-the-opentact-api.md)
- [Log Retrieval](https://doc.opentact.org/opentact-api-documentation/log-retrieval.md)
- [Retrieve Call Log](https://doc.opentact.org/opentact-api-documentation/log-retrieval/retrieve-call-log.md)
- [Retrieve SMS Log](https://doc.opentact.org/opentact-api-documentation/log-retrieval/retrieve-sms-log.md)
- [Calling](https://doc.opentact.org/opentact-api-documentation/calling.md)
- [Bridge two calls](https://doc.opentact.org/opentact-api-documentation/calling/bridge-two-calls.md)
- [Make Single Call](https://doc.opentact.org/opentact-api-documentation/calling/make-single-call.md)
- [Make Bulk Call](https://doc.opentact.org/opentact-api-documentation/calling/make-bulk-call.md)
- [Example API Call](https://doc.opentact.org/opentact-api-documentation/calling/make-bulk-call/example-api-call.md)
- [SIP Domain](https://doc.opentact.org/opentact-api-documentation/sip-domain.md)
- [Create SIP Domain](https://doc.opentact.org/opentact-api-documentation/sip-domain/create-sip-domain.md)
- [Create SIP User](https://doc.opentact.org/opentact-api-documentation/sip-domain/create-sip-user.md)
- [Deleting SIP User](https://doc.opentact.org/opentact-api-documentation/sip-domain/deleting-sip-user.md)
- [Modify SIP User](https://doc.opentact.org/opentact-api-documentation/sip-domain/modify-sip-user.md)
- [Websocket Event Subscription](https://doc.opentact.org/opentact-api-documentation/websocket-event-subscription.md): Seamless Event Integration with Opentact's Subscription Model
- [Create Subscription](https://doc.opentact.org/opentact-api-documentation/websocket-event-subscription/create-subscription.md)
- [Remove Subscription](https://doc.opentact.org/opentact-api-documentation/websocket-event-subscription/remove-subscription.md)
- [Get Subscribed Events](https://doc.opentact.org/opentact-api-documentation/websocket-event-subscription/get-subscribed-events.md)
- [Example API Call](https://doc.opentact.org/opentact-api-documentation/websocket-event-subscription/get-subscribed-events/example-api-call.md)