Individual skill
tooluniverse-custom-tool
Add custom local tools to ToolUniverse alongside the 1000+ built-in tools. Covers JSON-config tools (simplest, no code), Python class tools (REST/SOAP/GraphQL APIs, computational logic), and best-practices for return schemas. Use for wrapping new APIs, adding domain-specific computations, or contributing tools to the registry.
plugins/tooluniverse/skills/tooluniverse-custom-tool/SKILL.md
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- Last checked
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- Nov 8, 2026
- License
- Apache-2.0
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- agents Repository topic
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SKILL.mdcore · 9,560 bytesSKILL.mdcore · 9,560 bytesSKILL.mdcore · 9,560 bytesSKILL.mdcore · 9,560 bytesSKILL.mdcore · 9,560 bytesSKILL.mdcore · 9,560 bytesreferences/json-tool.mddoc · 10,471 bytesreferences/python-tool.mddoc · 22,032 bytes
Read excerpt
# Adding Custom Tools to ToolUniverse
**When to create a custom tool:** Create one if you need to access an API that ToolUniverse
doesn't cover, or if you need a specialized data transformation that no existing tool provides.
Start with the JSON config approach (simplest — no Python needed); escalate to a Python class
only if you need custom response parsing or stateful logic.
Three ways to add tools — pick the one that fits your needs:
| Approach | When to use |
|---|---|
| **JSON config** | REST API with standard request/response — no coding needed |
| **Python class (workspace)** | Custom logic for local/private use only |
| **Plugin package** | Reusable tools you want to share or install via pip |