NAME
MCP::Constants - Constants for MCP (Model Context Protocol)
SYNOPSIS
use MCP::Constants qw(PROTOCOL_VERSION);DESCRIPTION
MCP::Constants provides constants used in MCP (Model Context Protocol).
CONSTANTS
MCP::Constants exports the following constants.
HEADER_MISMATCH
The error code for a request whose routing headers disagree with its JSON-RPC body.
INSUFFICIENT_SCOPE
The error code for a request whose access token lacks a required OAuth scope. This is a local authorization policy rather than a spec-defined code, and lives in the -32000 to -32019 range the specification grandfathers for existing SDK use; -32020 to -32099 is reserved for the specification itself.
INTERNAL_ERROR
The error code for a prompt, resource, or tool that died, or returned a promise that was rejected.
INVALID_PARAMS
The error code for invalid parameters. Also used for prompts, resources, and tools that were not found.
INVALID_REQUEST
The error code for an invalid request.
META_CLIENT_CAPABILITIES
The _meta key carrying the capabilities of the client making the request.
META_CLIENT_INFO
The _meta key carrying the name and version of the client making the request.
META_LOG_LEVEL
The _meta key carrying the minimum log level the client wants to receive for a request.
META_PROTOCOL_VERSION
The _meta key carrying the protocol version a request is made with.
META_SERVER_INFO
The _meta key carrying the name and version of the server in a result.
META_SUBSCRIPTION_ID
The _meta key carrying the subscription a notification belongs to.
METHOD_NOT_FOUND
The error code for a method that was not found.
MISSING_CLIENT_CAPABILITY
The error code for a request that requires a client capability the client did not declare.
PARSE_ERROR
The error code for a parse error.
PROTOCOL_VERSION
The version of the Model Context Protocol being used.
SUPPORTED_VERSIONS
An array reference with every protocol version the server accepts, newest first.
UNSUPPORTED_PROTOCOL_VERSION
The error code for a request made with a protocol version the server does not support.
SEE ALSO
MCP, https://mojolicious.org, https://modelcontextprotocol.io.