What is a coding agent? Claude Code, Cursor, and Codex explained simply

From chatbot to agent

A chatbot answers questions. You ask how to do something, it explains it, and you implement it yourself. An agent goes further: It receives a task, plans the steps, executes them with tools, checks the result, and corrects itself.

What is a coding agent? Such an agent, specialized in software. Well-known examples are Claude Code from Anthropic, Cursor as a code editor with an integrated assistant, and Codex from OpenAI.

What a coding agent does

• It reads the files of a project and understands how they are related.
• It writes and modifies code across multiple files.
• It executes commands, such as tests, and reacts to the result.
• It explains what it has done and asks for clarification on important steps.

Even those who do not program themselves can give a coding agent clearly described tasks, such as transforming a list or having a small script written for recurring work.

Tools: Files, Command Line, MCP

• Files: The agent works directly in your project folder.
• Command line: It invokes programs, such as the sameqr-CLI with "sameqr qr create", and reads the responses with --json.
• MCP: Via the Model Context Protocol, it uses services directly. You integrate Same-QR with a command or a configuration entry; the address is https://sameqr.com/api/mcp.

Using Same-QR as a tool, an agent creates and modifies QR codes, queries scan numbers, and processes menus and hosted pages.

What it is suitable for and what it is not

Tasks that are clearly describable and verifiable are well suited: routines, changes after a relaunch, many similar entries, scripts for reports. Decisions involving responsibility are less suitable. An agent can make mistakes, and it does so with the same conviction as when it is correct.

First steps

• Start with a small task that only reads.
• Have the agent show a plan before making changes.
• Start connections to services with as few rights as possible; for Same-QR, use a "read only" key.
• Check results randomly and only then hand over larger tasks.

Conclusion: why Same-QR

A coding agent is only as good as its tools. Same-QR provides everything it needs for QR codes and hosted pages via MCP server and CLI, in every plan, with read-only keys for a secure start.

Get started right away: sign up for free at sameqr.com, two dynamic QR codes are free forever. API, CLI and MCP server are included in every plan, and the documentation is at sameqr.com/entwickler.

Frequently asked questions