About the project
Inspiration
The seed for "Voice AI Crypto Analyst" was planted in January 2025, when I joined a 1 Million USD prize pool Web3 AI Hackathon by Fundraiser.com. My initial vision was to embed an AI chat agent directly into personal wallets, offering it as an extension product for on-wallet insights. However, after dedicating over 20+ days (5+ hours a day) during the hackathon, I discovered significant legal and technical barriers: MetaMask and Phantom, for instance, don't allow manipulation of their interface, and there was no legal means to bypass these restrictions. Despite immense effort, I failed to build even a basic prototype with that original approach, and unfortunately, didn't get to submit my project.
This setback, however, led to a crucial realization. By May 2025, as MCP (Model Context Protocol) servers began to trend, a striking void became apparent: there was an abundance of text-based AI chat managers for crypto assets, but no voice AI solution for on-the-go management of personal crypto wallets.
It was then I decided to embark on building the Voice AI Crypto Analyst – soon to be the first-ever, all-in-one Crypto Portfolio management app controlled purely by voice command. This innovation is driven by the desire to merge cutting-edge AI with unparalleled security, powered by Safe Wallet smart contracts for trustworthy safety, and by Vapi AI's guardrails, HIPAA compliance, and PCI-compliant professional prompts for a secure and reliable voice experience. As a founder committed to innovation, I believe this technology will be adopted by the masses, starting with the Voice AI Crypto Analyst app on the web, soon to be expanded to mobile.
What it does
The "Voice AI Crypto Analyst" is a voice-activated assistant designed for effortless cryptocurrency data access. As of its Version 1 MVP (End of June 2025), it's capable of:
Responding to voice commands to fetch real-time crypto prices (e.g., "What's the price of Bitcoin?").
Retrieving trending cryptocurrencies (e.g., "Tell me about trending coins?").
It is designed to seamlessly integrate data like market caps, trading volumes, historical charts, exchange information, NFT collection data, and DeFi pools, all sourced from CoinGecko.
How I built it
The project leverages a powerful combination of applications to achieve its voice-driven capabilities:
Vapi AI: Utilized as the Voice AI Interface, it serves as the conversational frontend handling speech-to-text, text-to-speech, and the Large Language Model (LLM) orchestration. It provides the phone number users call and directs queries to our backend.
n8n: This serves as the backend automation platform, specifically acting as our custom Model Context Protocol (MCP) server. It receives Vapi's tool calls and orchestrates the data retrieval.
CoinGecko MCP Server: Provides comprehensive crypto data via its SSE (Server-Sent Events) endpoint, which n8n connects to.
Reason for Current Scope: This project, while functional, represents an initial MVP. Due to an extremely busy schedule this month, working on multiple other demanding AI projects, I made a strategic decision in the last 5 hours before the 10 PM UK time submission deadline. I concluded it was more feasible to focus on releasing a robust CoinGecko MCP server solution for now, allowing the core voice-to-data flow to be demonstrated effectively, rather than rushing a full Safe Wallet integration. The ultimate goal for Crypto Management on voice command with extremely high accuracy, powered by Safe Wallet, with no data storage and full PCI & HIPAA compliance, remains central to the vision.
Challenges I ran into
Building this MVP in such a short timeframe presented several fascinating challenges:
MCP Protocol Nuances: Understanding how Vapi AI's MCP-compliant tool calls work, particularly the distinction between streaming capabilities for overall communication versus the single request-response expected for atomic tool results.
n8n Node Specifics: Differentiating between generic webhook triggers and specialized MCP triggers, and mastering the intricate data flow within n8n when connecting multiple parallel data sources into a single processing node. Correctly parsing $input.item.json['Node Name'].data from diverse node outputs required precise debugging.
Webhook URL Precision: The most persistent and frustrating challenge was getting the exact public URL right for Vapi AI. This included troubleshooting 404 errors caused by incorrect paths or the problematic /sse suffix in the webhook configuration, which required meticulous attention to ngrok tunneling and n8n path settings.
Time Constraints: The extreme pressure of building a functional prototype with live API integration in just a few hours necessitated ruthless prioritization and a strategic pivot for the MVP.
Accomplishments that I'm proud of
Despite the immense time constraints and technical hurdles, I'm incredibly proud of several key accomplishments:
Establishing a functional end-to-end Voice AI Crypto Analyst MVP from a concept to a working prototype in a matter of hours.
Successfully integrating Vapi AI's voice capabilities with a custom n8n backend acting as an MCP server.
Mastering the connection and data retrieval from CoinGecko's specialized SSE MCP server within the n8n environment.
Developing a streamlined process for future feature expansion, demonstrating a clear path from simple data retrieval to complex smart contract interactions.
Maintaining a strong focus on the core product vision: delivering on-the-go, accurate crypto insights via pure voice command, setting the stage for future security and management features.
What I learned This rapid development cycle was a profound learning experience, teaching me:
The critical importance of precise API documentation interpretation and debugging tools when integrating disparate systems (Vapi, n8n, CoinGecko MCP).
The nuances of Model Context Protocol (MCP) beyond theoretical understanding, specifically its practical application for AI agent tooling.
Strategic scope management in time-sensitive projects, understanding when to pivot and simplify without compromising the long-term vision.
The power of low-code platforms like n8n in accelerating backend development for complex integrations.
The specific technical requirements for creating a secure and compliant AI application in the Web3 space (e.g., handling sensitive data, avoiding hallucinations).
What's next for Voice AI Crypto Analyst The "Voice AI Crypto Analyst" is currently available for free for beta users, with a limit of 10 minutes of voice AI conversations per week. This is a limited offering in its beta version.
An upgrade to an unlimited version offer will arrive by end of August 2025 for users who sign up before the production version is released.
The production version will be powered by Safe Wallet for smart contract management, adding a next-level layer of security and value to the Voice AI Crypto Analyst. By end of July 2025, we aim for deeper integration to allow users to connect and get balance information on their private crypto wallets (such as MetaMask Wallet, Binance Wallet, and Coinbase Wallet) safely through Safe Wallet sign-in via Safe Wallet itself. Safe Wallet is even trusted by Ethereum's founder, and its robust smart contract security definitely represents the future of Web3.
By end of July 2025, we will implement a system to provide one unique phone number per user, each connected to a specially prompted Vapi AI agent. This allows for a highly personalized and secure conversational experience tailored to individual user needs, moving beyond the single phone number for all sign-ups we have initially.
By end of Summer 2025, the ultimate goal is to enable users to make transactions and investments directly through voice commands, always secured by their connected Safe Wallet. This vision pushes towards truly intuitive, secure, and responsible crypto management.
Disclaimer
Cryptocurrency investments are highly volatile and inherently risky. The "Voice AI Crypto Analyst" is an analytical and informational tool designed to provide data based on public information. It is not a financial advisor, and any information provided should not be construed as investment advice. Users are strongly encouraged to conduct their own research and consult with a qualified financial professional before making any investment decisions. Our AI will be built with advanced anti-hallucination techniques and robust, safe prompting strategies within Vapi AI to ensure reliable and non-advisory responses.
Built With
- bolt.new
- coingecko
- github
- mcp
- n8n
- safe{wallet}
- supabase
- vapi.ai
- vercel
