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buildbyalex

AI Agents

AI agents thatactually close.

Not a toy. Production-grade agents connected to your data and tools, with metrics and an admin panel.

Discuss the taskFrom €1,200

Tech stack

  • OpenAI / GPT
  • Anthropic / Claude
  • Google Gemini
  • Function calling
  • Vector DB (pgvector / Pinecone)
  • Firestore
  • AmoCRM API
  • Telegram Bot API
  • Wappi (WhatsApp)
  • Node.js / Express

What I build

RAG assistants

A chat that answers from your knowledge base — without hallucinations. Citations, sources, fallback to a human.

Sales bots

Lead qualification with function calling, scenario classification, automatic pipeline movement in your CRM.

Process automation

Daily lead pulls, email classification, on-brand content generation, report aggregation.

Integrations

AmoCRM, HubSpot, Pipedrive, Telegram, WhatsApp, Instagram DM, Slack, Google Workspace.

Admin & metrics

Not a black box. Dashboard with dialogs, tags, response rating, exports and manual overrides.

Model-agnostic

GPT-5 / Claude / Gemini — we pick per task and budget. Swap without rewriting the project.

Questions about AI

  • Real. Function calling, tools, RAG, dialog classification, backend logic, integrations — what separates a working agent from a chat wrapper.

  • Depends on volume. A typical sales agent on GPT-4o-mini / Gemini Flash sits around €30–80/month in API at 1000+ dialogs. Full estimate on the discovery call.

  • Almost never in a well-built RAG. I enforce a strict-citation mode: if the answer isn't in the corpus, the agent says 'I don't know' and routes to a human. Controllable.

  • Through the native API. AmoCRM v4, HubSpot, Pipedrive — webhooks and REST. The bot tags, moves through the pipeline, leaves notes. Everything a manager does manually — automatic.

  • Plug it in. The architecture is provider-agnostic through an abstraction layer. Swapping GPT for Claude or Gemini is a day's work, not a week.

AI Agents & Automation — Custom-built — buildbyalex