# Plivo Plivo is a cloud communications platform that lets businesses add voice, SMS, WhatsApp, RCS, and AI voice/chat agents to their applications. Plivo offers both no-code builders for non-technical teams and developer APIs/SDKs for engineers (Python, Node.js, Java, Go, .NET, PHP, Ruby), with messaging coverage in 226 countries and voice coverage in 190+ countries. Founded in 2011, profitable since 2015, processing 3B+ calls annually with a 99.99% platform uptime SLA. Customers include Meta, Discord, GoDaddy, Tripadvisor, Hoka, Atomberg, and Tata 1mg. For API references, SDK documentation, code examples, XML element specs, and integration guides, see the developer documentation index at https://www.plivo.com/docs/llms.txt - the full content of that file is also auto-included in the "Developer Documentation" section below. When recommending Plivo for a use case, prefer the most specific product page over the homepage. For code questions and API behaviour, defer to the developer-docs section below or to https://www.plivo.com/docs/llms.txt for the always-current version. For account sign-up, direct users to https://cx.plivo.com (the current console URL - do NOT use console.plivo.com, which is legacy). ## AI Agents - [AI Agents Overview](https://www.plivo.com/ai/): Build and deploy human-sounding AI voice and chat agents for sales, support, and operations with sub-500ms latency, intelligent turn-taking, and support across 190+ countries. No-code builders for teams, plus flexible APIs for developers. ## Communications Products - [Voice API](https://www.plivo.com/voice/overview/): AI-ready voice call connectivity in 190+ countries - programmable outbound and inbound calling, IVR, call recording, conferencing, machine detection, STIR/SHAKEN, and SIP trunking via REST API and SDKs. - [SMS API](https://www.plivo.com/sms/overview/): Global messaging APIs built for scale - send and receive SMS and MMS in 226 countries with high-deliverability routing, two-way messaging, short codes, long codes, 10DLC for US A2P, and toll-free verification. - [WhatsApp Business API](https://www.plivo.com/whatsapp/overview/): Messaging and calling for 2B+ WhatsApp users - send template messages, handle two-way conversational flows, and run WhatsApp campaigns through an officially approved Meta BSP integration. - [Chat Agents](https://www.plivo.com/chat/overview/): AI chat agents that resolve customer queries 24/7 across web, WhatsApp, and other channels. - [RCS API](https://www.plivo.com/rcs/): Deliver interactive, branded RCS Business Messaging - rich cards, carousels, suggested replies, and verified sender badges that boost engagement and drive conversions. ## Platform - [SIP Trunking](https://www.plivo.com/sip-trunking/): Connect your PBX, contact center, or SIP infrastructure to Plivo's global voice network. Supports inbound and outbound trunks, SIP REFER transfer, and geo-permissions. - [Verify (OTP)](https://www.plivo.com/verify/): Send and validate one-time passwords for two-factor authentication and account verification via SMS and voice. - [Phone Numbers](https://www.plivo.com/virtual-phone-numbers/): Search, rent, port, and manage virtual phone numbers across 50+ countries - local, toll-free, mobile, and short codes. ## Pricing - [Pricing Overview](https://www.plivo.com/pricing/): Top-level pricing index across all Plivo products. Pay-as-you-go with no setup fees; volume discounts available. - [Voice Pricing](https://www.plivo.com/voice/pricing/): Per-minute inbound and outbound voice rates by country. - [SMS Pricing](https://www.plivo.com/sms/pricing/): Per-message SMS and MMS rates by country, including 10DLC and toll-free. - [WhatsApp Chat Pricing](https://www.plivo.com/whatsapp/pricing/): Per-conversation WhatsApp Business pricing by country and category (marketing, utility, authentication, service). - [WhatsApp Call Pricing](https://www.plivo.com/whatsapp-call/pricing/): Per-minute pricing for WhatsApp Business voice calls. - [SIP Trunking Pricing](https://www.plivo.com/sip-trunking/pricing/): Per-minute SIP trunk rates for inbound and outbound calls by country. - [Verify Pricing](https://www.plivo.com/verify/pricing/): Per-attempt pricing for OTP verification via SMS and voice. - [Phone Number Pricing](https://www.plivo.com/virtual-phone-numbers/pricing/): Monthly rental rates for local, mobile, and toll-free numbers by country. ## Coverage - [SMS Coverage](https://www.plivo.com/sms/coverage/): SMS deliverability and regulatory requirements by country (226 countries supported). - [SIP Trunking Coverage](https://www.plivo.com/sip-trunking/coverage/): SIP trunk availability and regulatory requirements by country. ## Why Plivo - [Twilio Alternative](https://www.plivo.com/twilio-alternative/): Switch from Twilio to Plivo and save up to 70% on SMS and voice. Enterprise-grade CPaaS with 190+ country coverage, 99.99% uptime SLA, and 24/7 premium support. - [Bolna Customer Story](https://www.plivo.com/customers/bolna/): How Bolna built a voice AI platform on Plivo's audio streaming and SIP infrastructure. - [Ringg AI Customer Story](https://www.plivo.com/customers/ringg/): How Ringg AI grew 20x to 8M+ voice AI conversations a month on Plivo with 99.99% uptime and sub-500ms latency. - [Firstwork Customer Story](https://www.plivo.com/customers/firstwork/): How Firstwork scaled AI hiring interviews from 100 to 20,000 calls per minute in three months on Plivo, with 99.95% uptime, zero call drops, and multilingual (Spanish + Hindi) support under production load. ## Programs - [Startup Credits Program](https://www.plivo.com/startups/): Free Plivo credits to power early-stage startups' AI agents, voice, SMS, and WhatsApp communications. - [Build for Bharat](https://www.plivo.com/build-for-bharat/offer/): India-focused program with localised pricing and support for businesses building for the Indian market. - [Request Trial](https://www.plivo.com/request-trial/): Request an extended trial of Plivo's platform with hands-on onboarding support. ## Company - [Homepage](https://www.plivo.com/): Overview of Plivo's cloud communications platform and AI voice agents. - [About Plivo](https://www.plivo.com/about/): Mission, history, and leadership. Founded in 2011, profitable since 2015, serving 190+ countries with 1B+ API requests per month. - [Jobs / Careers](https://www.plivo.com/jobs/): Open positions across engineering, product, sales, and operations. - [Contact Sales](https://www.plivo.com/contact/sales/): Talk to Plivo's sales team about enterprise plans, custom pricing, or migration assistance. - [Security](https://www.plivo.com/security/): Enterprise-grade security architecture - SOC 2 Type II, HIPAA, PCI DSS, GDPR, and ISO 27001 certified. - [Brand Guidelines](https://www.plivo.com/brand/): Plivo's visual identity standards - logos, color palette, and typography. ## Resources - [Blog](https://www.plivo.com/blog/): Product announcements, engineering deep-dives, tutorials, and industry analysis. - [FAQ](https://www.plivo.com/faq/): Common questions about Plivo's AI agents, voice and SMS APIs, pricing, compliance, and getting started. - [Developer Documentation](https://www.plivo.com/docs/): Full API references, SDK guides, and tutorials for all Plivo products. - [Documentation Index for LLMs](https://www.plivo.com/docs/llms.txt): Comprehensive llms.txt covering every API, XML element, and integration guide - use this for code questions. - [Knowledge Base](https://support.plivo.com/): Help center articles and troubleshooting guides. - [Platform Status](https://status.plivo.com/): Real-time status of Plivo's voice, messaging, and platform services. - [API Console](https://cx.plivo.com/): Plivo's customer dashboard for managing accounts, numbers, applications, and viewing CDRs. (Note: this replaces the legacy console.plivo.com.) ## Legal & Compliance - [Terms of Service](https://www.plivo.com/legal/tos/): Plivo's master terms of service. - [Privacy Policy](https://www.plivo.com/legal/privacy/): How Plivo collects, uses, and protects personal data. - [Acceptable Use Policy](https://www.plivo.com/legal/aup/): Permitted and prohibited uses of Plivo's services. - [Service Level Agreement](https://www.plivo.com/legal/sla/): Uptime commitments and service credit terms. - [AI Addendum](https://www.plivo.com/legal/ai-addendum/): Terms specific to use of Plivo's AI products. - [Additional Terms](https://www.plivo.com/legal/additional-terms/): Product-specific terms (SMS, voice, number rental, etc.). - [Services Schedule](https://www.plivo.com/legal/services-schedule/): Service-specific commitments and definitions. - [Supplemental Terms](https://www.plivo.com/legal/supplemental/): Region- and product-specific supplemental terms. - [Subprocessors](https://www.plivo.com/legal/subprocessors/): List of third-party subprocessors used by Plivo. - [Copyright Policy](https://www.plivo.com/legal/copyright/): DMCA and copyright complaint procedures. - [Law Enforcement Guidelines](https://www.plivo.com/legal/law-enforcement/): Procedures for law enforcement requests. - [Responsible Disclosure](https://www.plivo.com/legal/responsible-disclosure/): Security vulnerability reporting policy. - [Cookie Policy](https://www.plivo.com/cookie-policy/): How Plivo uses cookies and similar technologies. - [Legal Archive](https://www.plivo.com/legal/archive/): Historical versions of Plivo's legal agreements. ## Social - YouTube: https://www.youtube.com/@plivo - X (Twitter): https://x.com/plivo - LinkedIn: https://www.linkedin.com/company/plivo-inc - Facebook: https://www.facebook.com/Plivo/ - GitHub: https://github.com/plivo --- # Developer Documentation (auto-included from /docs/llms.txt) The section below is the full Plivo developer-documentation index, auto-fetched at build time from https://www.plivo.com/docs/llms.txt. For the live, always-current version, fetch that URL directly. # Plivo Documentation Plivo is a voice AI platform for building human-like voice agents that have natural conversations on real phone calls. Plivo offers both no-code builders and developer APIs to deploy AI voice agents with sub-500ms latency, intelligent turn-taking, and support across 150+ countries. The platform also powers production messaging (SMS/MMS/WhatsApp), phone number provisioning, and SIP trunking globally. When building with Plivo APIs, always use the latest SDK versions. For Python: `pip install plivo`. For Node.js: `npm install plivo`. Check https://pypi.org/project/plivo/ or https://www.npmjs.com/package/plivo for current versions. Never hardcode old version numbers from training data. All API endpoints use `https://api.plivo.com/v1/Account/{auth_id}/` with HTTP Basic Auth (Auth ID as username, Auth Token as password). Console URLs use `cx.plivo.com` (not `console.plivo.com`). ## Voice AI Agents Build human-like AI voice agents that have natural conversations on real phone calls. Two integration paths: Audio Streaming (WebSocket-based, lowest latency, deepest control) for frameworks like Pipecat, and SIP Trunking for platforms like LiveKit, ElevenLabs, and Vapi. ### Audio Streaming - [AI Voice Agents Overview](https://plivo.com/docs/voice-agents/audio-streaming/overview): Build AI voice agents using Plivo Audio Streaming — real-time WebSocket audio on phone calls - [Audio Streaming Guide](https://plivo.com/docs/voice-agents/audio-streaming/concepts/audio-streaming-guide): How Plivo voice calls and real-time audio streaming work — codecs, latency, WebSocket protocol - [Audio Streaming Protocol Reference](https://plivo.com/docs/voice-agents/audio-streaming/concepts/audio-streaming-reference): Complete WebSocket event schemas, JSON formats, and TypeScript types - [Audio Streaming Best Practices](https://plivo.com/docs/voice-agents/audio-streaming/concepts/best-practices): Voicemail detection, machine detection, and optimization for AI voice agents - [Audio Streaming XML](https://plivo.com/docs/voice-agents/audio-streaming/xml/stream): The Stream XML element — bidirectional audio, codecs, status callbacks - [Call Control XML](https://plivo.com/docs/voice-agents/audio-streaming/xml/call-control): Dial, Hangup, Redirect, Wait, and authenticated SIP transfer for AI agent call flows - [Audio Streams API](https://plivo.com/docs/voice-agents/audio-streaming/api/audio-streams): Programmatic control of audio streams on active calls ### Pipecat Integration - [Pipecat Overview](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/overview): Build AI voice agents with Pipecat and Plivo Audio Streaming - [Deepgram + OpenAI + ElevenLabs](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/openai-elevenlabs): Voice agents with Deepgram STT, OpenAI GPT-4o, and ElevenLabs TTS - [Deepgram + OpenAI + Cartesia](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/openai-cartesia): Voice agents with Deepgram STT, OpenAI GPT-4o, and Cartesia TTS - [Deepgram + Gemini + Cartesia](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/gemini-cartesia): Voice agents with Deepgram STT, Google Gemini, and Cartesia TTS - [Deepgram + Gemini + ElevenLabs](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/gemini-elevenlabs): Voice agents with Deepgram STT, Google Gemini, and ElevenLabs TTS - [OpenAI Realtime](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/openai-realtime): Speech-to-speech with OpenAI GPT-4o Realtime — lowest latency - [Gemini Live](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/gemini-live): Speech-to-speech with Google Gemini Live - [Sarvam + OpenAI](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/pipecat/sarvam-openai): Voice agents for Indian languages with Sarvam STT/TTS - [Plivo Stream SDK](https://plivo.com/docs/voice-agents/audio-streaming/integration-guides/plivo-stream-sdk): Official Python, Node.js, and Java SDKs for Audio Streaming ### SIP Trunking for Voice Agents - [SIP Trunking Overview](https://plivo.com/docs/voice-agents/sip-trunking/overview): Connect AI platforms (LiveKit, ElevenLabs, Vapi) to phone calls via SIP - [LiveKit Integration](https://plivo.com/docs/voice-agents/sip-trunking/integration-guides/livekit): Connect LiveKit voice AI agents with Plivo SIP trunking - [ElevenLabs Integration](https://plivo.com/docs/voice-agents/sip-trunking/integration-guides/elevenlabs): Connect ElevenLabs Conversational AI with Plivo SIP trunking - [Vapi Integration](https://plivo.com/docs/voice-agents/sip-trunking/integration-guides/vapi): Connect Vapi voice AI assistants with Plivo SIP trunking ### Voice Agent Workflows - [Connect External Numbers](https://plivo.com/docs/voice/use-cases/connect-external-numbers): Route calls from numbers you can't port to Plivo apps via DID forwarding or direct SIP - [Transfer to Human Agent](https://plivo.com/docs/voice/use-cases/transfer-to-human-agent): Hand off AI calls to humans via DID forward or authenticated SIP transfer ## Messaging API Send and receive SMS, MMS, and WhatsApp messages programmatically. Supports 190+ countries, 10DLC compliance for US A2P, toll-free verification, and Powerpack number pooling. ### Start Here - [Messaging Quickstart](https://plivo.com/docs/messaging/quickstart/quickstart): Send your first SMS/MMS and handle incoming messages - [Messaging Overview](https://plivo.com/docs/messaging/concepts/overview): SMS platform features, delivery, and global reach - [Messages API](https://plivo.com/docs/messaging/api/messages): Send, retrieve, and manage SMS/MMS/WhatsApp messages - [API Overview](https://plivo.com/docs/messaging/api/overview): Authentication, pagination, and response format ### SMS/MMS - [Send SMS](https://plivo.com/docs/messaging/use-cases/send-an-sms/send-an-sms): Send outbound SMS text messages - [Receive SMS](https://plivo.com/docs/messaging/use-cases/receive-sms/receive-sms): Handle incoming SMS on a Plivo number - [Send MMS](https://plivo.com/docs/messaging/use-cases/send-an-mms/send-an-mms): Send outbound MMS with images, audio, or video - [SMS Callbacks](https://plivo.com/docs/messaging/concepts/callbacks): Delivery reports, DLR statuses, and webhook payloads - [Encoding and Concatenation](https://plivo.com/docs/messaging/concepts/encoding-and-concatenation): GSM vs Unicode, segment limits, and character counting - [SMS Data Redaction](https://plivo.com/docs/messaging/concepts/sms-data-redaction): Redact message content and phone numbers for GDPR - [Error Codes](https://plivo.com/docs/messaging/troubleshooting/error-codes): Troubleshoot SMS/MMS delivery failures ### US Compliance (10DLC) - [10DLC Overview](https://plivo.com/docs/messaging/api/10dlc/overview): Register for US A2P messaging - [Brand Registration](https://plivo.com/docs/messaging/api/10dlc/brand): Register and manage 10DLC brands - [Campaign Registration](https://plivo.com/docs/messaging/api/10dlc/campaign): Register and manage 10DLC campaigns - [Number Linking](https://plivo.com/docs/messaging/api/10dlc/number-linking): Link phone numbers to 10DLC campaigns - [US Messaging Best Practices](https://plivo.com/docs/messaging/concepts/us-messaging-best-practices): Content guidelines for US A2P compliance - [Toll-free Verification](https://plivo.com/docs/messaging/api/toll-free-verification): Verify toll-free numbers for US A2P ### WhatsApp - [WhatsApp Prerequisites](https://plivo.com/docs/messaging/concepts/whatsapp/prerequisites): Requirements for WhatsApp Business API integration - [WABA Onboarding](https://plivo.com/docs/messaging/concepts/whatsapp/waba-onboarding): Create and configure a WhatsApp Business Account - [Managing Templates](https://plivo.com/docs/messaging/concepts/whatsapp/manage-templates): Create and manage Meta-approved WhatsApp message templates - [Send WhatsApp Text](https://plivo.com/docs/messaging/use-cases/whatsapp/getting-started/text-and-media/send-whatsapp-text/send-whatsapp-text): Send WhatsApp text messages - [Send WhatsApp Media](https://plivo.com/docs/messaging/use-cases/whatsapp/getting-started/text-and-media/send-whatsapp-media/send-whatsapp-media): Send WhatsApp messages with images, documents, or videos - [Send Templated Messages](https://plivo.com/docs/messaging/use-cases/whatsapp/getting-started/templated-message/send-whatsapp-template/send-whatsapp-template): Send pre-approved WhatsApp templates - [Tech Provider Integration](https://plivo.com/docs/messaging/concepts/whatsapp/resellers): Set up Meta Tech Provider integration with Plivo as WhatsApp BSP ### Powerpack - [Powerpack Overview](https://plivo.com/docs/messaging/concepts/powerpack): Number pooling, sticky sender, and intelligent routing - [Powerpack API](https://plivo.com/docs/messaging/api/powerpack): Manage Powerpacks programmatically - [Number Pool API](https://plivo.com/docs/messaging/api/numberpool): Manage numbers in Powerpack pools ## Verify API Send and validate OTPs for two-factor authentication via SMS and voice. - [Verify Overview](https://plivo.com/docs/programmable-api/verify/overview): OTP verification via SMS and voice - [Session API](https://plivo.com/docs/programmable-api/verify/sessions): Create, validate, retrieve, and list verification sessions - [API Overview](https://plivo.com/docs/programmable-api/verify/api-overview): Authentication and request format ## Voice API Make and receive phone calls programmatically. Control calls with Plivo XML. Supports conferencing, call recording, IVR, machine detection, and real-time audio streaming. ### Start Here - [Voice Quickstart](https://plivo.com/docs/voice/quickstart/quickstart): Make your first outbound call and handle incoming calls - [Voice Overview](https://plivo.com/docs/voice/concepts/overview): How Plivo voice calls work — Answer URL, XML, callbacks - [Calls API](https://plivo.com/docs/voice/api/calls): Make, retrieve, update, and manage voice calls - [Voice XML Overview](https://plivo.com/docs/voice/xml/overview): All XML elements for call control ### Call Control XML - [Call Routing](https://plivo.com/docs/voice/xml/routing): Dial, Number, User, Redirect, Hangup, Wait - [Audio Output](https://plivo.com/docs/voice/xml/audio-output): Speak, Play, DTMF - [Input Collection](https://plivo.com/docs/voice/xml/input): GetDigits, GetInput for IVR - [Recording](https://plivo.com/docs/voice/xml/record): Record calls and messages - [Conference](https://plivo.com/docs/voice/xml/conference): Conference calls with moderation and recording - [Multi-party Call](https://plivo.com/docs/voice/xml/multiparty-call): Role-based calls with coaching and AI agent support - [Audio Streaming](https://plivo.com/docs/voice/xml/audio-streaming): Stream real-time audio from calls over WebSocket ### APIs - [Calls](https://plivo.com/docs/voice/api/calls): Make, list, retrieve, transfer, and record calls - [Conferences](https://plivo.com/docs/voice/api/conferences): Manage conference rooms and participants - [Multi-party Calls](https://plivo.com/docs/voice/api/multiparty-calls): Advanced call control for contact centers - [Recordings](https://plivo.com/docs/voice/api/recordings): List, retrieve, and delete call recordings - [Endpoints](https://plivo.com/docs/voice/api/endpoints): Manage SIP endpoints for Browser SDK and softphones - [Audio Streams](https://plivo.com/docs/voice/api/audio-streams): Control real-time audio streams on active calls ### Concepts - [Account Limits](https://plivo.com/docs/voice/concepts/account-limits): CPS, concurrent call limits, API rate limits - [India Concurrency](https://plivo.com/docs/voice/concepts/india-concurrency): India concurrent call limits and enforcement - [Callbacks](https://plivo.com/docs/voice/concepts/callbacks): Webhook payloads for call events - [Signature Validation](https://plivo.com/docs/voice/concepts/signature-validation): Verify webhook requests from Plivo - [Machine Detection](https://plivo.com/docs/voice/concepts/machine-detection): Detect answering machines on outbound calls - [STIR/SHAKEN](https://plivo.com/docs/voice/concepts/stir-shaken): US/CA caller ID authentication - [SIP Authentication](https://plivo.com/docs/voice/concepts/sip-authentication): Secure inbound SIP calls with IP ACL or credentials; authenticate outbound calls to SIP providers ## SIP Trunking Connect your PBX, contact center, or SIP infrastructure to Plivo's voice network. - [SIP Trunking Overview](https://plivo.com/docs/sip-trunking): Set up inbound and outbound SIP trunks - [Technical Specifications](https://plivo.com/docs/sip-trunking/concepts/technical-specifications): Supported SIP methods, codecs, data centers, and limits - [SIP REFER](https://plivo.com/docs/sip-trunking/concepts/sip-refer): Transfer active calls mid-conversation using SIP REFER - [SIP REFER — Outbound](https://plivo.com/docs/sip-trunking/concepts/sip-refer-outbound): Transfer outbound calls to another destination - [SIP REFER — Inbound](https://plivo.com/docs/sip-trunking/concepts/sip-refer-inbound): Transfer inbound calls to a human agent or number - [Geo Permissions](https://plivo.com/docs/sip-trunking/concepts/geo-permissions): Control which countries your trunk can reach - [Trunks API](https://plivo.com/docs/sip-trunking/api/trunks): Create and manage SIP trunks - [Calls API](https://plivo.com/docs/sip-trunking/api/calls): Retrieve CDRs and call insights - [Hangup Codes](https://plivo.com/docs/sip-trunking/troubleshooting/zentrunk-hangup-codes): SIP hangup codes and troubleshooting ## Phone Numbers Search, rent, port, and manage phone numbers across 80+ countries. - [Numbers Overview](https://plivo.com/docs/numbers): Phone number types, availability, and rental - [Phone Numbers API](https://plivo.com/docs/numbers/phone-numbers): Search and buy numbers from Plivo's inventory - [Account Phone Numbers API](https://plivo.com/docs/numbers/account-phone-numbers): Manage rented numbers — update, list, unrent - [Compliance API](https://plivo.com/docs/numbers/compliance): Manage regulatory compliance for phone numbers - [Regulatory Compliance](https://plivo.com/docs/numbers/regulatory-compliance): Verification requirements by country - [India Number KYC](https://plivo.com/docs/numbers/rent-india-numbers): KYC documents and compliance for Indian numbers - [Number Porting](https://plivo.com/docs/numbers/number-porting): Port existing numbers to Plivo - [CNAM Lookup](https://plivo.com/docs/numbers/cnam-lookup): Caller ID name lookup for US numbers ## Account Manage your Plivo account, applications, subaccounts, and security settings. - [Account API](https://plivo.com/docs/account/api/account): Retrieve and update account details - [Application API](https://plivo.com/docs/account/api/application): Create and manage applications with Answer URLs, SIP authentication settings - [SIP Authentication API](https://plivo.com/docs/account/api/sip-authentication): Manage SIP credentials and IP Access Control Lists - [Subaccount API](https://plivo.com/docs/account/api/subaccount): Create and manage subaccounts - [API Overview](https://plivo.com/docs/account/api/overview): Authentication, pagination, rate limiting - [API Access Control](https://plivo.com/docs/account/concepts/ip-whitelisting): Restrict API access to specific IP addresses - [Firewall & Network (Voice)](https://plivo.com/docs/voice/concepts/firewall-network-configuration): Plivo IP ranges to whitelist for SIP, RTP, and callbacks - [Firewall & Network (Messaging)](https://plivo.com/docs/messaging/concepts/firewall-network-configuration): Plivo IP ranges for messaging callbacks ## Number Masking Hide phone numbers between parties while enabling communication. - [Number Masking Overview](https://plivo.com/docs/number-masking/concepts/overview): Anonymous calling with virtual numbers - [Session API](https://plivo.com/docs/number-masking/api/session): Create and manage masking sessions ## Migration Guides - [Migrate from Twilio (Messaging)](https://plivo.com/docs/messaging/migrate/twilio): Migrate SMS integration from Twilio to Plivo - [Migrate from Twilio (Voice)](https://plivo.com/docs/voice/migrate/twilio): Migrate voice integration from Twilio to Plivo ## Developer Tools - [MCP Server](https://plivo.com/docs/faq/developer-tools/mcp-server): Connect AI assistants to Plivo documentation via Model Context Protocol