v0
database
Vercel Postgres Connection String Not Found
Your application cannot connect to Vercel Postgres because the connection string is missing, invalid, or not properly loaded from environment variables. Database operations fail immediately.
Vercel Postgres provides connection strings that must be correctly configured in your Next.js project to enable database access.
Error Messages You Might See
DATABASE_URL is undefined
Connection string is empty
Failed to connect to Vercel Postgres
[postgres] missing connection credentials
Common Causes
- DATABASE_URL environment variable not set in Vercel project settings
- Vercel Postgres database not created or deleted
- Connection string copied incorrectly with missing credentials
- .env.local not used in development, relying only on Vercel env vars
- Connection string in .env file without NEXT_PUBLIC_ prefix misunderstanding which vars are public
How to Fix It
Create Vercel Postgres database: In Vercel Dashboard, go to Storage > Postgres, click 'Create' to provision a database.
Copy connection string: After creation, copy the 'Connection string' and set as DATABASE_URL in Vercel project settings.
Local development: Create .env.local with the same DATABASE_URL for testing locally with production database.
Verify in code: Ensure your app reads DATABASE_URL: const connectionString = process.env.DATABASE_URL
Real developers can help you.
Franck Plazanet
I am a Strategic Engineering Leader with over 8 years of experience building high-availability enterprise systems and scaling high-performing technical teams. My focus is on bridging the gap between complex technology and business growth.
Core Expertise:
š Leadership: Managing and coaching teams of 15+ engineers, fostering a culture of accountability and continuous improvement.
šļø Architecture: Enterprise Core Systems, Multi-system Integration (ERP/API/ETL), and Core Database Structure.
āļø Cloud & Scale: AWS Expert; architected systems handling 10B+ monthly requests and managing 100k+ SKUs.
š Business Impact: Aligning tech strategy with P&L goals to drive $70k+ in monthly recurring revenue.
I thrive on "out-of-the-box" thinking to solve complex technical bottlenecks and am always looking for ways to use automation to improve business productivity.
ISHANTDEEP SINGH
Senior Software Engineer with 7+ years of experience in React, JavaScript, TypeScript, Next.js, and Node.js. Iāve also worked as a tech lead for startups, owning end-to-end technical execution including architecture, development, scaling, and delivery. I bring a strong mix of hands-on coding, product thinking, and technical leadership, and Iām comfortable building products from scratch as well as improving and scaling existing systems.
Rudra Bhikadiya
I build and fix web apps across Next.js, Node.js, and DBs.
Comfortable jumping into messy code, broken APIs, and mysterious bugs.
If your project works in theory but not in reality, I help close that gap.
legrab
I'll fill this later
Matt Butler
Software Engineer @ AWS
Alvin Voo
Iāve watched the tech landscape evolve over the last decadeāfrom the structured days of Java Server Pages to the current "wild west" of Agentic-driven development. While AI can "vibe" a frontend into existence, I specialize in the architecture that keeps it from collapsing.
My expertise lies in the critical backend infrastructure: the parts that must be fast, secure, and scalable. I thrive on high-pressure environments, such as when I had only three weeks to architect and launch an Ethereum redemption system with minimal prior crypto knowledge, turning it into a major revenue stream.
What I bring to your project:
Forensic Debugging: I don't just "patch" bugs; I use tools like Datadog and Explain Analyzers to map out bottlenecks and resolve root causesālike significantly reducing memory usage by optimizing complex DB joins.
Full-Stack Context: Deep experience in Node.js and React, ensuring backends play perfectly with mobile and web teams.
Sanity in the Age of AI: I bridge the gap between "best practices" and modern speed, ensuring your project isn't just built fast, but built to last.
Krishna Sai Kuncha
Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : )
Jacek Rozanski
Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004).
Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month.
What I bring to AI-built apps:
- I audit and fix security issues (OWASP methodology), performance bottlenecks, and architectural problems in codebases generated by Cursor, Claude Code, Lovable, Bolt, and v0
- I refactor AI-generated prototypes into production-grade applications with proper error handling, testing, and clean architecture (SOLID, DDD, hexagonal architecture)
- I set up the infrastructure AI tools don't touch: AWS hosting, CI/CD pipelines, automated deployments, database optimization, monitoring, and alerting
- I integrate external services: payment providers, email systems, partner APIs, SSO/auth
Tech stack: PHP 8.x, Symfony, React, Next.js, PostgreSQL, MySQL, Docker, AWS (ECS, RDS, S3, SQS/SNS, CloudFront), Terraform, Supabase. I also use AI tools daily (Claude Code, Cursor) in my own workflow, so I understand both the strengths and the gaps in AI-generated code.
Based in Poland (CET timezone). Available for async work and calls during EU/US business hours.
Prakash Prajapati
Iām a Senior Python Developer specializing in building secure, scalable, and highly available systems. I work primarily with Python, Django, FastAPI, Docker, PostgreSQL, and modern AI tooling such as PydanticAI, focusing on clean architecture, strong design principles, and reliable DevOps practices. I enjoy solving complex engineering problems and designing systems that are maintainable, resilient, and built to scale.
BurnHavoc
Been around fixing other peoples code for 20 years.
You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.
Get HelpFrequently Asked Questions
Where do I find my Vercel Postgres connection string?
In Vercel Dashboard, go to your project > Storage > Postgres. Click your database and copy the 'Connection string' value.
Should I use production connection string in dev?
For testing, yes. For local development only, create separate local PostgreSQL instance with different DATABASE_URL.
Can I use multiple databases with Vercel?
Yes, create multiple Postgres instances and reference them with different environment variables (DATABASE_URL_READ, etc).