VRChat Udon MCP
Server Configuration
Describes the environment variables required to run the server.
| Name | Required | Description | Default |
|---|---|---|---|
| UDON_MCP_CONFIG | No | Path to the configuration file for the VRChat Udon MCP server |
Capabilities
Features and capabilities supported by this server
| Capability | Details |
|---|---|
| tools | {
"listChanged": true
} |
| resources | {
"listChanged": true
} |
Tools
Functions exposed to the LLM to take actions
| Name | Description |
|---|---|
| search_documentationB | Search agent-skills-vrc-udon documentation with keyword, heading, and fuzzy matching |
| explain_topicA | Explain a Udon/VRChat topic citing indexed repository sections with path and line numbers |
| list_skillsB | Auto-discover all skills from the repository |
| read_skillA | Read full SKILL.md with metadata, rules, references, and templates |
| list_rulesC | List all UdonSharp rules from the repository |
| read_ruleB | Read a rule with purpose, constraints, examples, and related rules |
| search_referenceC | Search reference documentation in the repository |
| list_templatesB | List UdonSharp code templates from the repository |
| get_templateB | Get a specific UdonSharp template with full source code |
| validate_codeB | Validate UdonSharp code using rules parsed from the repository |
| explain_validationA | Explain a validation failure by referencing the repository rule that caused it |
| sdk_matrixB | Get SDK version matrix from repository documentation |
| search_sdk_featureC | Search SDK features like NetworkCallable, PlayerData, PhysBones |
| search_constraintsC | Search UdonSharp constraints (List, Dictionary, Coroutine, etc.) with alternatives |
| search_networkingC | Search networking topics: ownership, sync modes, late joiners, serialization |
| search_examplesC | Search UdonSharp code examples and patterns from the repository |
| search_best_practiceC | Search recommended patterns and best practices |
| search_antipatternC | Search anti-patterns and common mistakes to avoid |
Prompts
Interactive templates invoked by user choice
| Name | Description |
|---|---|
No prompts | |
Resources
Contextual data attached and managed by the client
| Name | Description |
|---|---|
| SDK Version Matrix | SDK version matrix from repository |
| Template Index | Index of UdonSharp templates from repository |
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