Extend AI Toolkit
Extend AI Toolkit. That is what the extend mcp mcp server brings to an AI assistant: the same capability, reachable through the Model Context Protocol rather than a separate app or dashboard.
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.
The server publishes 6 tools. What each one is for:
Requirements — The Requirements tool exposed by this serverTransactions — The Transactions tool exposed by this serverDevelopment — The Development tool exposed by this serverOpenAI — The OpenAI tool exposed by this serverLangChain — The LangChain tool exposed by this serverCrewAI — The CrewAI tool exposed by this serverConfiguration is passed through the environment: EXTEND_API_KEY, EXTEND_API_SECRET, ANTHROPIC_API_KEY. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.
langchain and langchain-openai packages - OpenAI: openai package - CrewAI: crewai package - Anthropic: anthropic package (for Claude)@modelcontextprotocol/inspector on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.
This sits in the AI and media services group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Extend MCP's toolset — Requirements, Transactions, Development and 3 more — is a fair guide to whether it matches your workflow. It is maintained by paywithextend; worth a glance at recent repository activity before you build anything load-bearing on it.
We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.
| Tool | What it does |
|---|---|
| Requirements | The Requirements tool exposed by this server. |
| Transactions | The Transactions tool exposed by this server. |
| Development | The Development tool exposed by this server. |
| OpenAI | The OpenAI tool exposed by this server. |
| LangChain | The LangChain tool exposed by this server. |
| CrewAI | The CrewAI tool exposed by this server. |
{
"mcpServers": {
"extend-ai-toolkit": {
"command": "npx",
"args": ["-y", "@modelcontextprotocol/inspector"],
"env": {
"EXTEND_API_KEY": "your-value",
"EXTEND_API_SECRET": "your-value",
"ANTHROPIC_API_KEY": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
langchain and langchain-openai packages - OpenAI: openai package - CrewAI: crewai package - Anthropic: anthropic package (for Claude)| Variable | Description | Required |
|---|---|---|
| EXTEND_API_KEY | Credential the server authenticates with. | Yes |
| EXTEND_API_SECRET | Credential the server authenticates with. | Yes |
| ANTHROPIC_API_KEY | Credential the server authenticates with. | Yes |
Build a programmable telecommunications stack for connecting telephony services with the Internet via a cloud-based utility.
Search built for AI, not humans — semantic web search that returns model-ready content, plus code context.
Answers, not links — delegate questions to Perplexity's search-grounded models and get cited responses back.
Give your assistant a voice — text-to-speech, voice cloning and audio tools from the ElevenLabs API.
Give your assistant a real code sandbox — isolated cloud VMs for actually running the code it writes.
The ML hub in your context window — search models, datasets, papers and run Spaces from the official server.