Paste an MCP initialize request, initialize response or capabilities object to see which protocol capabilities are advertised.
Clients and servers advertise supported capabilities during initialization. This inspector extracts those declarations and highlights recognized, experimental and unknown capability names.
Capability advertisement does not itself prove that every implementation behaves securely.
Inspect MCP initialize messages and capabilities including tools, resources, prompts, logging, roots, sampling and experimental capability declarations.
Use MCP Capabilities Inspector as a focused pre-flight utility while building, reviewing or debugging an MCP integration. Paste the relevant configuration, protocol message, metadata, schema or value into the tool and review the returned findings before the same data reaches a production client or server.
This developer utility is intended to shorten repetitive MCP setup and troubleshooting work. Review generated or normalized output before copying it into production because MCP clients may use implementation-specific configuration wrappers.
A clean result means the input passed the rules implemented by this utility. It does not guarantee application security, protocol interoperability or correct business behavior. Test important integrations against the exact MCP client, SDK, gateway and server versions used in your deployment.