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Extend MCP Server

Extend AI Toolkit

Local serverstdioPython

What is the Extend MCP Server?

Extend AI Toolkit

The short version

These tools are designed for existing Extend users with API keys. If you are not signed up with Extend and would like to learn more about our modern, easy-to-use virtual card and spend management platform for small- and medium-sized businesses, you can check us out at paywithextend.com.

  • Multiple AI Framework Support — Works with Anthropic Model Context Protocol, OpenAI Agents, LangChain LangGraph & ReAct, and CrewAI frameworks
  • Comprehensive Tool Set — Supports all of Extend's major API functionalities, spanning our Credit Card, Virtual Card, Transaction & Expense Management endpoints

What it needs from you

  • Python: Version 3.10 or higher - Extend API Key: Sign up at paywithextend.com to obtain an API key - Framework-specific Requirements: - LangChain: langchain and langchain-openai packages - OpenAI: openai package - CrewAI: crewai package - Anthropic: anthropic package (for Claude)

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Configuration

  • Python: Version 3.10 or higher - Extend API Key: Sign up at paywithextend.com to obtain an API key - Framework-specific Requirements: - LangChain: langchain and langchain-openai packages - OpenAI: openai package - CrewAI: crewai package - Anthropic: anthropic package (for Claude)
VariableDescriptionRequired
EXTEND_API_KEYCredential the server authenticates with.Yes
EXTEND_API_SECRETCredential the server authenticates with.Yes
ANTHROPIC_API_KEYCredential the server authenticates with.Yes

Example prompts to try

  • “Use Extend MCP to Requirements.”
  • “Use Extend MCP to Transactions.”
  • “Use Extend MCP to Development.”

Frequently asked questions

Python 3.10 or higher and a valid Extend API key (obtainable at paywithextend.com). Framework-specific packages (e.g., `anthropic` for Claude) may also be needed.

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