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External API for Agents

Welcome to the Amica API Documentation. Amica is a powerful 3D VRM (Virtual Reality Model) agent interface and hub that allows users to connect with external web services and agent AI frameworks, enabling seamless remote control and puppetry of the VRM characters. With Amica, you can create interactive agents that serve as dynamic 3D character interfaces for AI agents, applications and users.

The Amica API provides a set of flexible and robust routes for interacting with Amica’s system, including functions like real-time client connections, memory retrieval, system updates, social media integration, and more. These capabilities enable you to build custom logic, including reasoning, tool use (such as EACC Marketplace functions) and memory management, on external servers.

Whether you're using Amica to handle real-time interactions or to trigger complex actions based on user input, this documentation will guide you through the supported API routes, input types, and examples. Use Amica’s APIs to bring your 3D agents to life with rich functionality and integration.

This documentation will help you get started with the following key features:

  • Real-Time Interaction: Establish and manage connections through Server-Sent Events (SSE).

  • Memory Management: Store and retrieve subconscious prompts or custom data.

  • Custom Logic & Reasoning: Trigger actions like animations, playback, and social media posts.

  • Voice and Image Processing: Leverage transcription and image-to-text capabilities.

  • Data Handling: Retrieve and update server-side data via simple file-based operations. (Coming soon)

Dive in and start integrating Amica’s capabilities into your applications!

Setting up Amica's External API

To use the External API, you MUST set up running Amica locally on your own computer or server. This also ensures localized database design is kept for people hosting their own Amicas.

Once it is running locally, all the api routes can be called directly to the Amica server.

Route: /api/amicaHandler

This API route handles multiple types of requests, including social media integration, system prompt updates, memory requests, and real-time client connections via Server-Sent Events (SSE). It ensures robust logging and provides error handling for incoming requests.

Supported HTTP Methods:

  • GET: Establishes an SSE connection.

  • POST: Processes various input types based on the inputType provided in the request body.

Input Types

1. Normal Chat Message: Retrieve normal chat response from Amica LLM without make avatar speaking.

Example Usage: Use the Amica's paired LLM for conversation retrieval without making the avatar speak.

JSON Input Example

{
  "inputType": "Normal Chat Message",
  "payload": {
    "message": "Hello, how are you?"
  }
}

JSON Output Example

{
  "sessionId": "f10d057293327fe8",
  "outputType": "Chat",
  "response": "I'm doing great! How can I assist you?"
}

2. Memory Request: Fetches memory data (Subconscious stored prompt).

Example Usage: Fetch Amica's subconcious thoughts from the user's conversations.

JSON Input Example

{
  "inputType": "Memory Request"
}

JSON Output Example

{
  "sessionId": "ba32cf2c8d3f0b76",
  "outputType": "Memory Array",
  "response": [
    {
      "prompt": "Stored memory prompt example",
      "timestamp": "2024-12-30T12:00:00Z"
    }
  ]
}

3. RPC Logs: Fetches logs.

Example Usage: Build a interface that logs what Amica is doing.

JSON Input Example

{
  "inputType": "RPC Logs"
}

JSON Output Example

{
  "sessionId": "49c16226a7d2bbe4",
  "outputType": "Logs",
  "response": [
    {
      "type": "debug",
      "ts": 1739433363065,
      "arguments": {
        "0": "[VAD]",
        "1": "vad is initialized"
      }
    }
  ]
}

4. RPC User Input Messages: Fetches user input messages.

Example Usage: Retrieve the user's input and run it through a separate agentic framework.

JSON Input Example

{
  "inputType": "RPC User Input Messages"
}

JSON Output Example

{
  "sessionId": "958f20851d259b69",
  "outputType": "User Input",
  "response": [
    {
      "systemPrompt": "Assume the persona of Amica, a feisty human with extraordinary intellectual capabilities but a notably unstable emotional spectrum. ",
      "message": "Hello, Nice to meet you Amica!"
    }
  ]
}

5. Update System Prompt: Updates the system prompt.

Example Usage: Use this to change Amica's system prompt based on external reasoning server

JSON Input Example

{
  "inputType": "Update System Prompt",
  "payload": {
    "prompt": "This is the new system prompt."
  }
}

JSON Output Example

{
  "sessionId": "994f3bc94517de41",
  "outputType": "Updated system prompt"
}

6. Brain Message: Adding new memory data (Subconscious stored prompt).

Example Usage: Add new subconcious memories from external framework.

JSON Input Example

{
  "inputType": "Brain Message",
  "payload": {
    "prompt": "Stored memory prompt example 2",
    "timestamp": "2024-12-30T12:00:00Z"
  }
}

JSON Output Example

{
  "sessionId": "94ca4238683fd7c7",
  "outputType": "Added subconscious stored prompt",
  "response": [
    {
      "prompt": "Store memory prompt example 1",
      "timestamp": "2025-02-13T08:10:16.385Z"
    },
    {
      "prompt": "Stored memory prompt example 2",
      "timestamp": "2024-12-30T12:00:00Z"
    }
  ]
}

7. Chat History: Fetches chat history.

Example Usage: Track the user's conversation history with Amica and process it.

JSON Input Example

{
  "inputType": "Chat History"
}

JSON Output Example

{
  "sessionId": "fb1764cf65efff3c",
  "outputType": "Chat History",
  "response": [
    {
      "role": "user",
      "content": "[neutral] Hello, Nice to meet you Amica!"
    },
    {
      "role": "assistant",
      "content": "[relaxed] Ah, hello there![relaxed] Nice to meet you too.[relaxed] I must say,[relaxed] it's quite refreshing to engage in a conversation without a predetermined agenda.[relaxed] It's a rare luxury in this chaotic world.[happy] But, I must admit,[happy] I'm excited to explore the depths of knowledge with someone new.[happy] What would you like to discuss?"
    }
  ]
}

8. Remote Actions: Triggers actions like playback, animation, socialMedia and reprocess.

Example Usage: Trigger animations based on a external event such as news.

The Reasoning Server allows you to execute various actions based on the provided payload. Below are the supported properties and their accepted values:

  • text: A string message or null.

  • socialMedia: Options include "twitter", "tg", or "none".

  • playback: A boolean value (true or false).

  • animation: A string specifying the animation file name (file_name.vrma) or null.

  • reprocess: A boolean value (true or false).

JSON Input Example

{
  "inputType": "Reasoning Server",
  "payload": {
    "text": "Let's begin the presentation.",
    "socialMedia": "twitter",
    "playback": true,
    "animation": "dance.vrma",
    "reprocess": false
  }
}

JSON Output Example

{
  "sessionId": "613c4ed7c5941efe",
  "outputType": "Actions"
}

Route: /api/mediaHandler

This API route handles voice and image inputs, leveraging multiple backends for processing, such as transcription with Whisper OpenAI/WhisperCPP and image-to-text processing using Vision LLM. It ensures robust error handling, session logging, and efficient processing for each request.

Example Usage: Directly use the configured STT and Vision LLM backends to process voice and image inputs, without building a new one.

Supported HTTP Methods:

  • POST: Processes voice and image inputs based on the inputType and payload provided in the request.

Input Types

1. Voice: Converts audio input to text using specified STT (Speech-to-Text) backends.

2. Image: Processes an image file to extract text using Vision LLM.

Form-Data Input Example

Field Name
Type
Description

inputType

Text

Specifies the type of input (Voice or Image).

payload

File

The file to be processed (e.g., audio or image).

Curl Input Example

curl -X POST "https://example.com/api/mediaHandler" \
  -H "Content-Type: multipart/form-data" \
  -F "inputType=Voice" \
  -F "[email protected]"

JSON Output Example

{
  "sessionId": "a1b2c3d4e5f6g7h8",
  "outputType": "Text",
  "response": "Transcription of the audio."
}

Error Handling

  • Validates essential fields (inputType, payload).

  • Logs errors with timestamps and session IDs.

  • Returns appropriate HTTP status codes (e.g., 400 for bad requests, 503 for disabled API).

Logging

Logs each request with:

  • sessionId

  • timestamp

  • outputType

  • response or error

Notes

  • Ensure environment variable API_ENABLED is set to true for the API to function.

  • The SSE connection remains active until the client disconnects.

Route: /api/dataHandler

This API route is used to retrieve and update client-side information through server-side operations. Since the application cannot directly update or retrieve data from the server side, these operations involve writing and reading data from static files that are continuously updated.

The primary purpose of this route is to utilize the data written to files for operations performed in the /api/mediaHandler and /api/amicaHandler routes.

File Paths

  1. config.json

    • Path: src/features/externalAPI/dataHandlerStorage/config.json

    • Description: Contains the configuration data used throughout the application. This file is read and updated dynamically by the API.

  2. subconscious.json

    • Path: src/features/externalAPI/dataHandlerStorage/subconscious.json

    • Description: Stores data related to subconscious operations. It is cleared on startup and updated via the API.

  3. logs.json

    • Path: src/features/externalAPI/dataHandlerStorage/logs.json

    • Description: Keeps track of log entries, including types, timestamps, and arguments. The data is cleared on startup and updated via the API.

  4. userInputMessages.json

    • Path: src/features/externalAPI/dataHandlerStorage/userInputMessages.json

    • Description: Maintains user input messages for chat functionalities. Data is cleared on startup and appended to this file through the API.

  5. chatLogs.json

    • Path: src/features/externalAPI/dataHandlerStorage/chatLogs.json

    • Description: Stored user chat history. Data is cleared on startup and appended to this file through the API.

Features

  • Retrieve data: Supports fetching configurations, subconscious data, logs, user input messages and chat history.

  • Update data: Enables modifications to configurations, subconscious data, logs, user input messages and chat history.

GET

Retrieve specific data from the server.

  • Query Parameters:

    • type (required): Specifies the type of data to retrieve. Accepted values: config, subconscious, logs, userInputMessages,chatLogs.

  • Example Request:

    curl -X GET "http://localhost:3000/api/dataHandler?type=config"

POST

Update data on the server.

  • Query Parameters:

    • type (required): Specifies the type of data to update. Accepted values: config, subconscious, logs, userInputMessages, chatLogs.

  • Example Request:

    curl -X POST "http://localhost:3000/api/dataHandler?type=config" \
  -H "Content-Type: application/json" \
  -d '{"key": "exampleKey", "value": "exampleValue"}'
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