Tools & MCP.
Give your AI real capabilities with MCP tools
Connect any MCP server, control which tools your agent can access, and validate it uses tools correctly.
From zero to tool-augmented AI in 4 steps
Connect any MCP server in a few clicks.
Control which tools your agent can access, with version history.
Run your task and inspect every tool call, its arguments, and the tool's response in the full conversation trace.
Use tool-use evals to ensure your agent calls the right tools at the right time.
Tools & MCP in Kiln
Easily connect MCP servers
Connect any MCP server, local or remote, in just a few clicks.
Evaluate tool use
Kiln's tool use evals ensure your agent calls the appropriate tools with the correct parameters.
Track tool configurations
Kiln captures the full tool context of every agent run — every tool that was available, not just the ones invoked. This creates a reproducible trace for debugging, evals, and run comparison.
Fine-tune for tools
Tune models to call a specific set of tools, allowing small, fast, and cheap models to match frontier-model tool calling.
Kiln search tools
Create custom search tools (RAG), allowing your agent to search thousands of documents in milliseconds.
Enterprise customers may request a full refund within 30 days of the billing date, subject to usage thresholds.
Refund eligibility is determined by the contract tier and annual commitment terms agreed at signing.
For enterprise accounts, escalate refund requests to the account manager within 48 hours.
Everything you need for tool management
Enable only the tools each run needs to keep context focused.
Kiln warns when a selected model lacks tool-calling support.
API keys stored locally, never committed to Git-synced project files.
View every tool call's arguments and results in the message trace.
Tool setup before and after Kiln
- Edit a JSON config file buried in a dotfile directory every time you add or change an MCP server.
- Manually check traces to ensure tool calls are reliable.
- Build search/RAG tools by hand.
- Connect MCP servers through Kiln's UI with validation and troubleshooting guidance.
- Tool call evals ensure tools are called when needed, and catch regressions before you ship.
- Kiln builds and optimizes RAG/search tools for you.
Frequently asked
What is MCP?
The Model Context Protocol is an open standard for connecting AI systems to external tools and data sources. Kiln supports MCP natively as both client and server.
Can I connect my own custom MCP server?
Yes. Provide a command for local (stdio) servers or a URL for remote (HTTP/SSE) servers. Kiln supports both transports and walks you through auth setup.
How does Kiln handle secrets?
Mark env vars as secrets during setup. Secrets stay local and never touch Git-synced files. Teammates re-enter them on their own machines.
Can I use Kiln tools from other MCP clients?
Yes. Tools you create in Kiln, like search tools, become available to Claude Desktop, LMStudio, Jan, or any MCP client.
Connect your tools. Ship smarter agents.
Add MCP tools in minutes, validate model compatibility, and verify that your agent uses the right tool at the right time.