Custom AI Agent Development

Custom AI Agent Development

I build custom Claude and GPT agents that do real work inside your business. Not chat toys. Not demo gimmicks. Agents that read your CRM, write your reports, draft your outreach, route your tickets, and hand you the result. After shipping a WhatsApp AI bot for a French real estate developer, an AEO content rewriter, an Apify plus n8n plus Claude clone engine, and my own Jarvis brain system, I have a clear pattern for agents that survive contact with production.

What this is

An end to end build of one custom AI agent tied to your real workflow. Trigger, system prompt, tool calls, memory, evaluation set, and deployment. Built on Claude or GPT depending on the use case, wired into your stack via n8n or a small API service on Vercel or Cloudflare.

Who it is for

  • Founders sitting on a repetitive cognitive task that a junior could do but no one has time to hire for
  • Operators handling inbound (DMs, WhatsApp, email) at a volume that needs triage and first response
  • Agencies who want to install a research, draft, or QA agent into their delivery pipeline

What you get

  • One custom agent (Claude or GPT) with system prompt, tool calls, and memory tuned to your workflow
  • Integration with your stack (Slack, Notion, Airtable, HubSpot, Gmail, WhatsApp Business, etc.)
  • An evaluation set of 20 to 50 real cases the agent must pass before handover
  • Logging, observability, and a cost dashboard
  • Runbook covering prompt edits, tool changes, and how to extend the agent
  • 14 days of email support after handover

How it works

  1. Discovery call (free, 30 minutes) to confirm fit and lock the scope
  2. I build the system prompt, tool calls, and an evaluation set against your real data
  3. We iterate on prompt and tools until the agent passes the evaluation set
  4. I deploy, wire alerts and logging, hand over the runbook

Founder proof

I shipped a WhatsApp AI bot MVP for Cite Roselyne, a French real estate developer, in 5 days, on a 50 50 split, running on n8n plus GPT plus a Hostinger KVM2. I built the FB Clone Engine: Apify scrapes a Facebook page, Claude rewrites copy, gpt image 1 redesigns visuals with brand photo, Meta Graph API reposts to Facebook and Instagram. Total cost roughly 35 USD per month. I run my own Jarvis brain: 100+ scheduled triggers, daily briefs, weekly retros, project memory, all on Claude Code with custom hooks. These agents do real work every day.

Pricing

Founder rate starts at 2,500 USD for a single agent with a clear scope. Multi agent systems or agents with custom tool fleets start at 5,000 USD. Half upfront, half on handover. Typical timeline is 2 to 4 weeks.

FAQ

Claude or GPT, which one?
I pick based on the task. Claude wins on long context, structured tool use, and writing in voice. GPT wins on cost at scale and certain vision tasks. I tell you on the discovery call which fits your case.

What if the agent hallucinates?
Every agent I ship has a guardrail layer (validation, retrieval, deterministic fallbacks where the cost of being wrong is high) and an evaluation set the agent must pass. We do not ship until the evaluation passes.

Can the agent run inside my own infrastructure?
Yes. I deploy to Vercel, Cloudflare Workers, your own n8n, or a VPS. If you have data residency requirements (EU only, healthcare, etc.) we plan for that on day 1.

What does ongoing cost look like?
Token cost depends on volume and model. I run a cost simulation as part of the build so you see the monthly burn before you sign off. Most agents I ship cost under 100 USD per month in tokens.

Can you train my team to maintain it?
Yes. The runbook plus a 90 minute team session is included for multi agent builds. Single agent builds get the runbook plus a Loom walkthrough.

Apply for an agent build

Email me at hello@waseemnasir.com with one paragraph on the agent you want built. I reply inside 24 hours with a discovery call slot if it is a fit.

Further reading: see Wikipedia entry on answer engine optimization for the underlying technical context behind this engagement.

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