Concepts

MCP vs API Key and Base URL

Compare MCP, API Keys, Base URLs, model protocols, and tool protocols so you can choose the correct integration, configure it, and avoid common setup errors.

Short answer

MCP is a protocol for connecting AI tools to external tools, data sources, and context. API Key and Base URL are model request authentication and routing settings.

MCP answers: what tools and data can the agent use? API Key / Base URL answers: where do model requests go and how are they authenticated?

Configuring MCP does not configure the model API. Configuring a model API does not automatically give the tool external system access.

Comparison

Item	MCP	API Key / Base URL
Main job	Tool, data source, and context integration	Model requests, authentication, routing
Common targets	Local services, databases, files, browsers, business systems	OpenAI-compatible or Anthropic-compatible endpoints
Main risk	Tool permissions, data access, side effects	Secret leakage, protocol mismatch, model cost
Determines model	No	Usually yes

When people mix them up

They think MCP changes the model.
They think changing Base URL connects local tools.
They treat an MCP server as a model provider.
They put a model API Key into MCP configuration.
They do not know whether a tool expects OpenAI-compatible or Anthropic-compatible API.

How to decide

If you want an agent to access a database, browser, filesystem, internal system, or extra tool, look at MCP.

If you want to switch model, gateway, billing account, or provider, look at API Key, Base URL, and protocol.

If a workflow needs both a model switch and external tools, configure both layers and review permissions separately.

About BetterToken

BetterToken is the model API layer, not an MCP server. It handles API Key, Base URL, model routing, and usage records.

You can use BetterToken and MCP together: BetterToken handles model requests, while MCP handles tool and context extension.