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$
USD
I will build a custom mcp server for claude chatgpt or your API
Cynthia O.
About this gig
Need Claude, ChatGPT or another AI agent to securely access your APIs, databases or business tools?
I build custom MCP servers using the Model Context Protocol to connect AI assistants and agents to real systems.
I can help with:
- Custom MCP server development
- API and database integrations
- Claude, ChatGPT and AI agent connectivity
- Read and write MCP tools
- Authentication and permission controls
- Input validation and structured outputs
- Human approval before sensitive actions
- Error handling and testing
- FastAPI and Python integrations
- Docker setup and deployment support
I am an AI and Software Engineer with 5+ years of experience building backend systems, APIs and production AI applications.
I focus on reliable engineering beyond simple tool calling: secure access, clear permissions, validation, maintainable code and safe execution.
Please message me before ordering with the system you want connected, your API or data source, and the actions your AI should be able to perform.
Get to know Cynthia O.
Cynthia O.
AI Engineer specializing in MCP, Backend, Agents and FastAPI
- FromNigeria
- Member sinceJul 2022
- Last delivery3 years
Languages
English
I’m an AI and Software Engineer with 5+ years of experience building backend systems, web apps and production AI products. I build RAG applications, AI agents, MCP integrations, FastAPI backends, REST APIs and multi-tenant platforms. My stack includes Python, FastAPI, LangGraph, React, Next.js, PHP/Laravel, PostgreSQL, MySQL, MongoDB, Redis, Docker and AWS. I focus on reliable architecture, authentication, testing, retrieval quality and clean deployment. Need an AI product built, repaired or improved? Send me your requirements.
My Portfolio
FAQ
What is an MCP server?
An MCP server lets AI assistants and agents securely access external tools, APIs, databases and business systems through the Model Context Protocol.
What can you connect through MCP?
I can connect REST APIs, databases, internal tools, SaaS platforms, business systems and custom services.
Can you build MCP tools for Claude or ChatGPT?
Yes. I can build MCP-compatible tools for Claude, ChatGPT-compatible workflows and other AI agents that support MCP or similar tool integrations.
Can the MCP server perform actions, not just read data?
Yes. I can build both read and write tools, such as fetching records, creating items, updating data or triggering workflows.
Can you add authentication and permissions?
Yes. I can implement authentication, permission checks and controlled access so the AI only performs actions it is allowed to perform.
Can you connect the MCP server to a database?
Yes. I can integrate PostgreSQL, MySQL, MongoDB and other data sources depending on your project.
Can you add human approval before sensitive actions?
Yes. Sensitive or irreversible operations can require explicit approval before execution.
Do you provide testing and documentation?
Yes. Standard and Premium packages include testing and documentation for the implemented tools and integrations.
Can you deploy the MCP server?
Yes. I can prepare the server for deployment using Docker and suitable cloud or server environments.
Should I contact you before ordering?
Yes. Please send the API, database or system you want connected, the actions the AI should perform, and any authentication requirements so I can confirm the correct package.
