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I will connect your api to chatgpt or claude with function calling and mcp server
freelancer-jimy
About this gig
Connect your API, database or internal tool to ChatGPT, Claude or your own AI agent, using OpenAI function calling and MCP.
A demo is easy. Production is not: the API returns a 500, two calls arrive at once, the model sends a malformed argument, the token expires.
WHAT I BUILD:
- A tool your model can call, with a clear schema
- An MCP server, if you use Claude Desktop, Cursor or another MCP client
- Auth done properly: keys, bearer tokens, OAuth, header auth
- Error handling and retries, so one bad response does not kill the run
- Validation before anything reaches your system
HOW IT WORKS:
1. Tell me the system and the AI client you use
2. Send docs or a read-only key, or I work against a mock
3. You get working code and a setup guide
PLEASE READ FIRST:
I connect AI to systems you already own. I do not scrape, bypass logins or reach data you could not reach yourself. For live data, use a read-only key.
NOT INCLUDED:
Model training, prompt writing, hosting, and any promise about what my integration makes your AI do.
Ten years building backend systems. I care about what happens when things fail.
Not sure which package fits? Message me your stack and I will tell you.
Get to know freelancer-jimy
freelancer-jimy
AI, Backend Architect, n8n, AI Agents, Web Systems
- FromChina
- Member sinceJul 2026
- Avg. response time1 hour
Languages
Chinese, English
Hello, I’m freelancer-jimy. I build scalable backend web applications, n8n automations, and custom AI agents for businesses. My focus is simple: clean architecture, reliable code, and technical solutions that work seamlessly.
Whether you need custom n8n workflows, AI agent integration, Google reCAPTCHA implementation, or complex backend development, I bring enterprise-grade quality and fast delivery.
Ready to level up your technology? Let’s get started.
My Portfolio
FAQ
Which languages and stacks can you work with?
Yes, mostly. Function calling works with any language that can make an HTTP request. For MCP I write it in Python or TypeScript, since those have the mature SDKs. Tell me your stack and I will confirm before you order.
Will you need my API keys or credentials?
No. I never ask for credentials you do not want to share. Start with a read-only key, or send docs and I will build against a mock you run yourself. If you do share a key, rotate it when we finish.
How long does it take?
Basic is usually 2 to 3 days. MCP servers and multi-tool builds take longer, up to 7 days, because there is more to test.
Do I own the code you write?
Yes. You get the source code, a setup guide and a walkthrough, so your own developer can extend it. Nothing is locked to me.
Can you connect the AI to a site that does not have an official API?
I connect AI to systems you already have access to. I do not scrape sites, bypass logins, defeat rate limits or reach data you could not reach yourself. If that is what you need, I am not the right seller.
What if my integration turns out to be impossible?
Tell me the system and the client before ordering. If what you want is not something I can do safely, I will say so up front rather than take the order and cancel it.
