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Understanding Recipe Blocks

Blocks are the fundamental units of a Verloop Recipe. Each block represents a specific step, action, or decision in your conversation flow. By connecting these blocks, you can build sophisticated Voice AI Agents capable of handling everything from simple FAQs to complex, multi-turn consultations.

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Block Library

Verloop offers a diverse set of blocks to balance rigid control with the fluid reasoning of AI Agents.

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1. Message Block

The simplest way to deliver information. This block plays a pre-defined script or static text to the caller.

• Key Features: Instant text-to-speech rendering and low-latency execution.
• What it Enables: Greetings, legal disclaimers, or providing specific information that doesn’t require user input.
• Settings: * Text Content: The exact script the agent reads.

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2. Smart AI Block (LLM Block)

The core of your advanced automation. This block leverages a LLM to handle open-ended, multi-turn dialogues within a specific context.

• Key Features: Context retention across multiple exchanges, intent recognition, and entity extraction.
• What it Enables: Handling complex workflows where the user might ask follow-up questions or go off-script.
• Settings: * System Prompt: Instructions for the Smart AI Block behavior.
  • Conversation History: Should the conversation block have access to historic conversations.
  • Number of Turns: Number of times a AI Agent will try to assist before exiting the block.
  • Barge In: Enable or Disable ability of caller to interrupt while the AI Agent is speaking.
  • Nudge: Nudge enables AI Agent to repeat the question in case the caller has not anwsered it.
  • AnswerFlow: Enables AI Agent to access trained information from the Knowledge Base, Website and any other information source configured.
  • Speech Normalization: Converts numbers, units, weight and other data types into natural conversation format.
  • Intent and Variable Mapping: Intent and variable to be extracted from the conversation as it proceeds within the block.
• Exit Condition: Flow exits from the block once a Intent is matched from the configured list.
• Pro Tip: Essential for Voice AI Agents for Arabic to manage complex morphological variations and regional nuances in natural conversation.
• Latency Tip: Variable extraction from intent recognition adds to the overall call latency.

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3. Ask Block

A specialized, simplified LLM block designed to capture a single piece of information from the user.

• Key Features: Built-in retry logic and specific slot-filling capabilities.
• What it Enables: Efficient data collection (e.g., “What is your account number?”).
• Settings: * System Prompt: Instructions for the Smart AI Block behavior.
  • Conversation History: Should the conversation block have access to historic conversations.
  • Number of Turns: Number of times a AI Agent will try to assist before exiting the block.
  • Barge In: Enable or Disable ability of caller to interrupt while the AI Agent is speaking.
  • Nudge: Nudge enables AI Agent to repeat the question in case the caller has not anwsered it.
  • AnswerFlow: Enables AI Agent to access trained information from the Knowledge Base, Website and any other information source configured.
  • Speech Normalization: Converts numbers, units, weight and other data types into natural conversation format.
  • Intent and Variable Mapping: Intent and variable to be extracted from the conversation as it proceeds within the block.
• Exit Condition: Flow exits from the block once a Intent is matched from the configured list.
• Pro Tip: Essential for Voice AI Agents for Arabic to manage complex morphological variations and regional nuances in natural conversation.
• Latency Tip: Variable extraction from intent recognition adds to the overall call latency.

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4. Condition Block

The brain of your routing logic. It evaluates variables and conversation data to determine the next path.

• What it Enables: Personalized journeys. For example, routing high-value customers to a human and others to an automated flow.
• Settings: * Logic Rules: Define IF/ELSE conditions based on user input, existing variables or API responses.
  • Variables: Compare captured data points (e.g., order_value > 500).

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5. Code Block

For technical flexibility, the Code Block allows you to execute custom JavaScript snippets directly within the flow.

• Key Features: High-speed execution of custom logic.
• What it Enables: Data transformation, complex math, or formatting LLM outputs before they are spoken.
• Settings: * JS Editor: Write and test your JavaScript.
  • Input/Output Mapping: Pass variables into and out of the code environment.

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6. API Block

Integrate your Voice AI Agent with your tech stack in real-time.

• What it Enables: Fetching live data (like order status) or pushing updates to your CRM during a call.
• Settings: * Method: GET, POST, PUT, DELETE.
  • Configuration: Headers, Query Params, and JSON Body.
  • Mapping: Save API response fields into Recipe variables.

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7. Webhook Block

Make standard webhook calls to external services to trigger events outside the call.

• Key Features: Event-driven notifications.
• Settings: Webhook URL and custom payload configuration.

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8. Transfer Block

The bridge between Voice Agents and human empathy. This block hands off the call to a live representative.

• What it Enables: Escalation for complex issues or high-priority sales closures.
• Settings: * Transfer Destination: SIP URI or PSTN number.
  • Transfer Message: A bridge message played to the caller during the handoff.
• Localized Transfer: Crucial for Voice AI Agents for Arabic to route calls to native-speaking support teams based on detected dialects.

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9. Close Block

The logical conclusion of a call or a specific branch of the conversation.

• What it Enables: Professional termination of the call.
• Settings: * Closing Script: Final words before disconnect.
  • Disposition: Tag the call for reporting (e.g., “Resolved”, “Inquiry”).

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How to Connect Blocks