AWS Serverless MCP Server with Lambda event-source mapping 🚀☁️ #90
Step Function brings in metrics dashboard
In the previous issue, Lambda payload size now at 1MB for async invocations 🚀☁️ #89 we looked at the increased payload size on Lambda and how it helps with the breakdown on pricing.
In this issue, let’s take a dig at the new capabilites with the Serverless MCP Server with -
⚙️ Translating Requirements: Automatically translating high-level throughput, latency, and reliability needs into specific, optimized ESM configurations.
📝 Generating Code: Generating complete AWS Serverless Application Model (AWS SAM) templates with best-practice settings built-in.
🔍 Validating Topology: Diagnosing and validating network topology, especially for Amazon VPC-based event sources.
🩹 Troubleshooting: Guiding developers through common ESM issues from initial setup to optimization.
The update includes three specialized tools:
ESM Guidance Tool: Provides contextual guidance across all supported Lambda event sources.
ESM Optimization Tool: Helps analyze complex configuration trade-offs.
ESM Kafka Troubleshooting Tool: Offers specialized diagnostics for both Amazon MSK and self-managed Apache Kafka clusters.
Instead of manually researching best practices and calculating settings, developers can provide high-level requirements (like desired throughput or low latency). The new ESM tools automatically translate these needs into specific, optimized Event Source Mapping (ESM) configurations
⭐ Pick of the month
This month’s Pick is “Lambda optimization“.
Dive into fine-tuning Serverless REST APIs with AWS Lambda Power Tuning by Sabarish Sathasivan that brings in the benchmark for memory configs, simulating API invocation and data to choose the BEST configurations.
Karim Fayed’s real-world AWS Lambda optimization: what they don’t teach in the docs sharing the tips of how to minimize cold-starts, trimming package size, fine-tune memory and cost with Power Tuning.
Jones Zachariah Noel N (author) explains different factors which can account for maintaining Lambda function performance during peak traffic and how ALBs and API Gateway play a role in this architecture choice.
🚀 AWSome content to learn from
Jakub Gaj’s blog Moving from Serverless to Functionless sheds light on how the paradigm shift from “ serverless functions" to “functionless” with Step Functions has happened.
Sebastian Ball explains how you can deploy a GitHub app on AWS Lambda with CDK part-1, creating the Probot backend with the complete walk-through.
Martin Richards in part 1 of DynamoDB - when DynamoDB stops being simple, with a breakdown of the complexities and how access patterns are different, making it the best fit for OLTB.
Raghunathan S shares how Amazon SES’s new multi-tenancy changes are a game-changer for SaaS platforms, bringing in operational efficiency and enabling the tracking of metrics such as bounce rate and engagement stats.
Anton Aleksandrov breaks the myth that platform engineering isn’t just for K8S - Serverless needs it too, bringing the case that Serverless enables IaC, security, compliance, and observability standardization.
What even are Cloudflare Durable Objects by Boris Tane in the world of Serverless, they are more than stateful workers, enabling real-time and consistency, and scalability.
Malte Ubl takes on the challenge of vendor lock-in and how the anti-vendor lock-in cloud on Vercel where Vercel brings in the Next.js adapters and standardization, making it framework beyond the cloud providers.
Marko Djakovic gives you a guide to building better Serverless Chat on AWS over WebSockets with the AppSync EventsAPI and a walk-through of the feature with CDK app.
⚒️ What's happening with Serverless tools, samples, and projects
Pubudu Jayawardana built a sqs-to-lambda for testing 1MB payloads on async Lambda invocations.
Yeshwanth L M has published Serverless-KeyGen-Application.
Heloise Viegas has published AWS_Cloud_Cost_Calculator.
Ricardo Cino has published aws-lambda-stubs.
🎙️ Podcasts, videos and live-streams
Lessons Learned Building a Highly Available Serverless Client Portal on AWS by Scott Burgholzer at AWS UG Chicago meet-up.
On The Talking Serverless Podcast, Paul Chin Jr joins Sushanth Mangalore to talk about Simplifying Complexity with Serverless.
Nadtakan Futhoem and Thelma Laryea on It’s All About Serverless.
Adam Bien hosts Lighter AWS Lambda Power Tools For Java by Philipp Page.
Darla David puts together a tutorial for AWS Full Stack app.
Sebastien Stormacq joins Julian Wood on Serverless Office Hours talking about running Swift in AWS Lambda.
Jason Paul debunks 99% of developers don’t get Cold Start.
Dheeraj Choudhary gets to the basics - AWS Lambda Tutorial for Beginners.
🗓️ Mark your calendars
DynamoDB Day on November 19th, 2025.
AWS Community Days are happening -
ACD Kochi on December 20th, 2025.
ACD Israel on January 15th, 2026. (CFP open until November 15th, 2025)
📢 What's new in Serverless
Amazon EventBridge now supports targeting SQS fair queues.
Amazon S3 Tables now support Amazon CloudWatch metrics.
Announcing communication preferences for Security Incident Response.
AWS Config now supports 49 new resource types.
Announcing larger instances for Amazon Lightsail.
AWS Step Functions announces a new metrics dashboard.
AWS Serverless MCP Server now supports tools for AWS Lambda event source mappings (ESM).
AWS CloudFormation Hooks adds granular invocation details for Hooks invocation summary
👨💻 Word from the author
Thanks for the support and let’s share more about Serverless!!!
If you are attending AWS re:Invent 2025, look forward to meeting you in-person!! I’ll be there, shoot me a message on LinkedIn.
I’m open to feedback, so feel free to DM me on LinkedIn for any queries about AWS or Serverless.
If you are looking for any guidance or assistance with learning Serverless, my LinkedIn DMs are open for a chat!
Stay tuned and share with Serverless enthusiasts. Follow The Serverless Terminal on X (formerly Twitter) and Blog.
Until next time, happy building on Serverless!
Give Serverless MCP server a try and let us know what do you think!