Announcing Faramir: an LLM-powered microservice for validating phone numbers

generative AI   microservice architecture  

It’s been a while since I first wrote an article about LLMs and Microservices. But the various discussions at the ExploreDDD conference - including a panel about the intersection of DDD and LLMs - inspired me to revisit the topic.

Moreover, I was recently reminded of a tweet from 3 years that described how some websites make it difficult to enter information, such as a phone number:

The obvious solution is to use today’s golden hammer: an LLM, or more specifically, OpenAI’s GPT-4.

About Faramir

Faramir is a simple Python-based microservice that uses Langchain and OpenAI to validate and format phone numbers. You could, for example, use Faramir to make it easier for users to enter phone numbers in a web form.

Here’s an example of Faramir in action:

$ http POST localhost:8000/parse phoneNumber=5105551212
HTTP/1.1 200 OK
content-length: 27
content-type: application/json
date: Fri, 29 Mar 2024 22:25:58 GMT
server: uvicorn
    "result": "(510) 555-1212"

To learn more

To learn more about Faramir including the origin of the name, check out the GitHub repository.

generative AI   microservice architecture  

Copyright © 2024 Chris Richardson • All rights reserved • Supported by Kong.

About is brought to you by Chris Richardson. Experienced software architect, author of POJOs in Action, the creator of the original, and the author of Microservices patterns.

New workshop: Architecting for fast, sustainable flow

Enabling DevOps and Team Topologies thru architecture

DevOps and Team topologies are vital for delivering the fast flow of changes that modern businesses need.

But they are insufficient. You also need an application architecture that supports fast, sustainable flow.

Learn more and register for my June 2024 online workshops....


I help organizations improve agility and competitiveness through better software architecture.

Learn more about my consulting engagements, and training workshops.

LEARN about microservices

Chris offers numerous other resources for learning the microservice architecture.

Get the book: Microservices Patterns

Read Chris Richardson's book:

Example microservices applications

Want to see an example? Check out Chris Richardson's example applications. See code

Virtual bootcamp: Distributed data patterns in a microservice architecture

My virtual bootcamp, distributed data patterns in a microservice architecture, is now open for enrollment!

It covers the key distributed data management patterns including Saga, API Composition, and CQRS.

It consists of video lectures, code labs, and a weekly ask-me-anything video conference repeated in multiple timezones.

The regular price is $395/person but use coupon ILFJODYS to sign up for $95 (valid until April 12, 2024). There are deeper discounts for buying multiple seats.

Learn more

Learn how to create a service template and microservice chassis

Take a look at my Manning LiveProject that teaches you how to develop a service template and microservice chassis.

Signup for the newsletter

BUILD microservices

Ready to start using the microservice architecture?

Consulting services

Engage Chris to create a microservices adoption roadmap and help you define your microservice architecture,

The Eventuate platform

Use the platform to tackle distributed data management challenges in your microservices architecture.

Eventuate is Chris's latest startup. It makes it easy to use the Saga pattern to manage transactions and the CQRS pattern to implement queries.

Join the microservices google group