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Written by Max Zeshut
Founder at Agentmelt · Last updated Sep 9, 2026
A software development kit that provides libraries, APIs, and tooling for building AI agents programmatically. SDKs give developers lower-level control than no-code platforms—defining custom tool use, memory management, orchestration logic, and evaluation pipelines in code. The Anthropic Agent SDK, OpenAI Agents SDK, and LangChain are examples. SDKs are preferred when agents need custom business logic, non-standard integrations, or tight coupling with existing application code.
Using the Anthropic Agent SDK, a developer defines a customer support agent with custom tools for CRM lookup, ticket creation, and knowledge base search—each tool implemented as a Python function that the SDK orchestrates automatically.
See it as a workflow
Automated Code Review WorkflowTrigger, steps, n8n nodes, guardrails and an importable template — plus what it costs to have it built.
Or skip the build
Workflows from $197/month, custom agents from $2,000.