Show HN: MCPglue (Open Source) – Let your agent build its own tools

We found that many devs struggle building agent tools that work for each use case while not overwhelming the agent with too many options to pick from. That’s why we built MCPglue so your agents can build the tools they need when they need to. It gives you the reliability you’re looking for when deploying in prod, and agents the custom tools they need to do their job well.

Here’s a walkthrough of how it works: https://www.youtube.com/watch?v=uc-jdM9XnhE

MCPglue allows your agent to build its own tools using the superglue integration agent. It can read the documentation of your APIs and chain endpoints together to fulfil any use case, and expose them as tools via MCP. It abstracts away API calls and data mappings, and self-heals even as inputs, upstream APIs or data change.

You can use MCPglue to let your agent run cross-API workflows reliably, like fetching transactions in Stripe and updating them in Hubspot, to build agents that react to app triggers or to wrap your own API into task-specific tools agents can use.

Quickstart guide: https://docs.superglue.cloud/mcp Find us on GitHub: https://github.com/superglue-ai/superglue

Would be curious to hear how you’ve been dealing with tool use, and what you would want to build with MCPglue.