I will build a custom gpt or claude assistant with knowledge base and API calls

Want an AI assistant that knows your business and can work with your tools? I'll set up a custom GPT (ChatGPT) or a Claude Project with clear instructions, your knowledge files and, where the platform supports them, API actions that connect to your systems.

I'm a full-stack and AI integration engineer and have been building software since 2017. I've integrated LLMs (GPT-4, Gemini, Llama, Grok) into products and built REST APIs with OAuth 2.0, so the assistant can call your APIs in a controlled way.

WHAT YOU GET

- A system prompt written and tested for your use case

- Knowledge files cleaned and organised

- API actions: OpenAPI schema for your endpoints (custom GPT)

- Conversation starters and safe-answer rules

- A test log of sample Q&A and the fixes I made

- A guide to updating it yourself

GOOD FOR

Support assistants, sales/onboarding helpers, internal SOP bots, writing assistants in your brand voice, and tools that check orders or create tickets through your API.

HOW WE WORK

It's built in your own account, so you own it. You'll need a paid plan that supports custom GPTs/Projects. Tell me your goal and send me your files, and I'll confirm the scope before I start.