mcp

package
v1.3.79 Latest Latest
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 Go to latest Published: Jun 21, 2026 License: MIT Imports: 25 Imported by: 0

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Index

Constants

View Source 
const BrowserAutomationInstallSpec = "playwright stdio npx -y @playwright/mcp"

Variables

This section is empty.

Functions

func BrowserAutomationPreset added in v1.1.7 

func BrowserAutomationPreset() config.MCPServerConfig

func MergeStartupServers 

func MergeStartupServers(workingDir string, explicit []config.MCPServerConfig) ([]config.MCPServerConfig, []string)

func ParseInstallArgs 

func ParseInstallArgs(args []string) (config.MCPServerConfig, error)

func ParseMessage 

func ParseMessage(data []byte) (interface{}, error)

ParseMessage parses a JSON-RPC message from raw bytes. It can be a Request, Response, or Notification.

func PersistUserClaudeServers 

func PersistUserClaudeServers(cfg *config.Config) ([]string, bool, error)

Types

type Adapter 

type Adapter struct {
	// contains filtered or unexported fields
}

Adapter wraps MCP tools into ggcode's Tool interface.

func NewAdapter 

func NewAdapter(serverName string, caller toolCaller, tools []ToolDefinition) *Adapter

NewAdapter creates an MCP adapter from server config and tool definitions.

func (*Adapter) RegisterTools 

func (a *Adapter) RegisterTools(registry *tool.Registry) error

RegisterTools registers all MCP tools into the registry with "mcp__" prefix.

func (*Adapter) ServerName 

func (a *Adapter) ServerName() string

ServerName returns the MCP server name.

func (*Adapter) ToolCount 

func (a *Adapter) ToolCount() int

ToolCount returns the number of tools from this server.

func (*Adapter) ToolNames 

func (a *Adapter) ToolNames() []string

ToolNames returns the full ggcode tool names for all MCP tools.

type AuthorizationServerMetadata added in v1.1.34 

type AuthorizationServerMetadata struct {
	Issuer                            string   `json:"issuer"`
	AuthorizationEndpoint             string   `json:"authorization_endpoint"`
	TokenEndpoint                     string   `json:"token_endpoint"`
	RegistrationEndpoint              string   `json:"registration_endpoint,omitempty"`
	ScopesSupported                   []string `json:"scopes_supported,omitempty"`
	CodeChallengeMethodsSupported     []string `json:"code_challenge_methods_supported,omitempty"`
	GrantTypesSupported               []string `json:"grant_types_supported,omitempty"`
	ResponseTypesSupported            []string `json:"response_types_supported,omitempty"`
	TokenEndpointAuthMethodsSupported []string `json:"token_endpoint_auth_methods_supported,omitempty"`
	RevocationEndpoint                string   `json:"revocation_endpoint,omitempty"`
}

AuthorizationServerMetadata represents RFC 8414 authorization server metadata.

type CallToolParams 

type CallToolParams struct {
	Name      string                 `json:"name"`
	Arguments map[string]interface{} `json:"arguments,omitempty"`
}

type CallToolResult 

type CallToolResult struct {
	Content []ToolContent `json:"content"`
	IsError bool          `json:"isError,omitempty"`
}

type Client 

type Client struct {
	// contains filtered or unexported fields
}

Client connects to an MCP server via stdio transport.

func NewClient 

func NewClient(name, command string, args []string) *Client

NewClient creates a new MCP client for the given server config.

func NewClientFromConfig 

func NewClientFromConfig(cfg config.MCPServerConfig) *Client

func (*Client) Abort 

func (c *Client) Abort()

func (*Client) CallTool 

func (c *Client) CallTool(ctx context.Context, name string, args map[string]interface{}) (*CallToolResult, error)

CallTool invokes a tool on the MCP server.

func (*Client) Close 

func (c *Client) Close() error

Close terminates the server process.

func (*Client) ForceReauth added in v1.3.77 

func (c *Client) ForceReauth() error

ForceReauth deletes the server-name-specific OAuth credential (if any), leaving the canonical (shared) credential untouched. The next request will get a 401 and trigger a fresh OAuth flow bound to this server name.

func (*Client) GetPrompt 

func (c *Client) GetPrompt(ctx context.Context, name string, args map[string]interface{}) (*GetPromptResult, error)

func (*Client) Initialize 

func (c *Client) Initialize(ctx context.Context) (*InitializeResult, error)

Initialize sends the initialize request and returns server capabilities.

func (*Client) ListPrompts 

func (c *Client) ListPrompts(ctx context.Context) ([]PromptDefinition, error)

func (*Client) ListResources 

func (c *Client) ListResources(ctx context.Context) ([]ResourceDefinition, error)

func (*Client) ListTools 

func (c *Client) ListTools(ctx context.Context) ([]ToolDefinition, error)

ListTools returns the tools provided by the MCP server.

func (*Client) Name 

func (c *Client) Name() string

Name returns the MCP server name.

func (*Client) ReadResource 

func (c *Client) ReadResource(ctx context.Context, uri string) (*ReadResourceResult, error)

func (*Client) Start 

func (c *Client) Start(ctx context.Context) error

Start launches the MCP server process.

type ClientCaps 

type ClientCaps struct {
	Roots struct {
		ListChanged bool `json:"listChanged,omitempty"`
	} `json:"roots,omitempty"`
}

type ClientRegistration added in v1.1.34 

type ClientRegistration struct {
	ClientID     string `json:"client_id"`
	ClientSecret string `json:"client_secret,omitempty"`
}

ClientRegistration represents RFC 7591 dynamic client registration response.

type DeviceFlowResponse added in v1.1.34 

type DeviceFlowResponse struct {
	DeviceCode      string `json:"device_code"`
	UserCode        string `json:"user_code"`
	VerificationURI string `json:"verification_uri"`
	ExpiresIn       int    `json:"expires_in"`
	Interval        int    `json:"interval"`
}

DeviceFlowResponse holds the response from the device code endpoint.

type Error 

type Error struct {
	Code    int             `json:"code"`
	Message string          `json:"message"`
	Data    json.RawMessage `json:"data,omitempty"`
}

Error is a JSON-RPC error object.

func (*Error) Error 

func (e *Error) Error() string

type GetPromptParams 

type GetPromptParams struct {
	Name      string                 `json:"name"`
	Arguments map[string]interface{} `json:"arguments,omitempty"`
}

type GetPromptResult 

type GetPromptResult struct {
	Description string          `json:"description,omitempty"`
	Messages    []PromptMessage `json:"messages"`
}

type ID 

type ID struct {
	// contains filtered or unexported fields
}

ID can be a string or number.

func NewIntID 

func NewIntID(n int64) ID

func NewStringID 

func NewStringID(s string) ID

func (ID) MarshalJSON 

func (id ID) MarshalJSON() ([]byte, error)

func (*ID) UnmarshalJSON 

func (id *ID) UnmarshalJSON(data []byte) error

type Implementation 

type Implementation struct {
	Name    string `json:"name"`
	Version string `json:"version"`
}

type InitializeParams 

type InitializeParams struct {
	ProtocolVersion string         `json:"protocolVersion"`
	Capabilities    ClientCaps     `json:"capabilities"`
	ClientInfo      Implementation `json:"clientInfo"`
}

type InitializeResult 

type InitializeResult struct {
	ProtocolVersion string         `json:"protocolVersion"`
	Capabilities    ServerCaps     `json:"capabilities"`
	ServerInfo      Implementation `json:"serverInfo"`
}

type ListPromptsResult 

type ListPromptsResult struct {
	Prompts []PromptDefinition `json:"prompts"`
}

type ListResourcesResult 

type ListResourcesResult struct {
	Resources []ResourceDefinition `json:"resources"`
}

type ListToolsParams 

type ListToolsParams struct {
	Cursor string `json:"cursor,omitempty"`
}

type ListToolsResult 

type ListToolsResult struct {
	Tools []ToolDefinition `json:"tools"`
}

type Notification 

type Notification struct {
	JSONRPC string          `json:"jsonrpc"`
	Method  string          `json:"method"`
	Params  json.RawMessage `json:"params,omitempty"`
}

Notification is a JSON-RPC notification (no ID).

type OAuthHandler added in v1.1.34 

type OAuthHandler struct {
	// contains filtered or unexported fields
}

OAuthHandler manages OAuth 2.1 authentication for a single MCP server.

func NewOAuthHandler added in v1.1.34 

func NewOAuthHandler(serverName, serverURL string, store *auth.Store) *OAuthHandler

NewOAuthHandler creates a new OAuth handler for an MCP server.

func (*OAuthHandler) Close added in v1.1.34 

func (h *OAuthHandler) Close()

Close cleans up the callback server.

func (*OAuthHandler) DeleteServerToken added in v1.3.77 

func (h *OAuthHandler) DeleteServerToken() error

DeleteServerToken removes only the server-name-specific credential and marks the handler to skip the canonical (shared) fallback on the next load. This forces a fresh OAuth flow even when a valid shared credential exists. The flag is cleared once a new token is saved via SaveToken.

func (*OAuthHandler) ExchangeCode added in v1.1.34 

func (h *OAuthHandler) ExchangeCode(ctx context.Context, code string) (*TokenResponse, error)

ExchangeCode exchanges an authorization code for tokens.

func (*OAuthHandler) GetAccessToken added in v1.1.34 

func (h *OAuthHandler) GetAccessToken(ctx context.Context) (string, error)

GetAccessToken returns a valid access token, refreshing if needed. Returns empty string if no token exists. If the token is expired but there is a refresh token, it attempts to refresh. If the token is expired and there is no refresh token, it still returns the access token optimistically — the server will return 401 if truly expired, which triggers the OAuth flow. This avoids premature re-authentication when the token has a few minutes left (the 5-minute IsExpired() buffer caused tokens to be discarded too early, requiring re-auth every time).

func (*OAuthHandler) GetScopes added in v1.1.34 

func (h *OAuthHandler) GetScopes() []string

GetScopes returns the scopes supported by the protected resource.

func (*OAuthHandler) Handle401 added in v1.1.34 

func (h *OAuthHandler) Handle401(resp *http.Response) (bool, error)

Handle401 processes a 401 response. Returns true if OAuth is needed.

func (*OAuthHandler) HasPendingDeviceFlow added in v1.3.70 

func (h *OAuthHandler) HasPendingDeviceFlow() bool

HasPendingDeviceFlow reports whether a device authorization flow is waiting for polling.

func (*OAuthHandler) NeedsDiscovery added in v1.1.34 

func (h *OAuthHandler) NeedsDiscovery() bool

NeedsDiscovery returns true if OAuth metadata hasn't been discovered yet.

func (*OAuthHandler) PollDeviceToken added in v1.1.34 

func (h *OAuthHandler) PollDeviceToken(ctx context.Context) (*TokenResponse, error)

PollDeviceToken polls the token endpoint until the user authorizes the device code. Should be called after StartDeviceFlow and the user visits the verification URI.

func (*OAuthHandler) RegisterClient added in v1.1.34 

func (h *OAuthHandler) RegisterClient(ctx context.Context) error

RegisterClient performs RFC 7591 dynamic client registration.

func (*OAuthHandler) SaveToken added in v1.1.34 

func (h *OAuthHandler) SaveToken(tokenResp *TokenResponse) error

SaveToken persists the token response to the auth store. It always saves under the server-name key (mcp:<serverName>), enabling per-server credential isolation. If the canonical (shared) key does not yet exist, the token is also saved there so that other servers with the same OAuth issuer can reuse it without a separate auth flow. If the canonical key already exists, it is left untouched.

func (*OAuthHandler) ServerName added in v1.1.34 

func (h *OAuthHandler) ServerName() string

ServerName returns the name of the MCP server this handler is for.

func (*OAuthHandler) SetClientCredentials added in v1.1.34 

func (h *OAuthHandler) SetClientCredentials(clientID, clientSecret string)

SetClientCredentials sets pre-configured client credentials for servers without DCR.

func (*OAuthHandler) ShutdownCallbackServer added in v1.3.70 

func (h *OAuthHandler) ShutdownCallbackServer()

ShutdownCallbackServer stops the local OAuth callback server if it is running.

func (*OAuthHandler) StartAuthFlow added in v1.1.34 

func (h *OAuthHandler) StartAuthFlow(ctx context.Context) (string, error)

StartAuthFlow initiates the authorization code + PKCE flow. Returns the authorize URL for the user's browser and starts a local callback listener.

func (*OAuthHandler) StartDeviceFlow added in v1.1.34 

func (h *OAuthHandler) StartDeviceFlow(ctx context.Context, scopes []string) (*DeviceFlowResponse, error)

StartDeviceFlow initiates a device authorization flow (RFC 8628). Returns the device flow response containing user_code and verification URI.

func (*OAuthHandler) SupportsDCR added in v1.1.34 

func (h *OAuthHandler) SupportsDCR() bool

SupportsDCR returns true if the authorization server supports dynamic client registration.

func (*OAuthHandler) SupportsDeviceFlow added in v1.1.34 

func (h *OAuthHandler) SupportsDeviceFlow() bool

SupportsDeviceFlow returns true if we can attempt device flow for this server. Checks for a known device code endpoint or a device_authorization_endpoint in metadata.

func (*OAuthHandler) WaitForCallback added in v1.1.34 

func (h *OAuthHandler) WaitForCallback(ctx context.Context) (string, error)

WaitForCallback waits for the OAuth callback on the local server.

type OAuthRequiredError added in v1.1.34 

type OAuthRequiredError struct {
	Handler *OAuthHandler
}

OAuthRequiredError signals that OAuth authentication is needed.

func (*OAuthRequiredError) Error added in v1.1.34 

func (e *OAuthRequiredError) Error() string

type PromptArgument 

type PromptArgument struct {
	Name        string `json:"name"`
	Description string `json:"description,omitempty"`
	Required    bool   `json:"required,omitempty"`
}

type PromptDefinition 

type PromptDefinition struct {
	Name        string           `json:"name"`
	Description string           `json:"description,omitempty"`
	Arguments   []PromptArgument `json:"arguments,omitempty"`
}

type PromptMessage 

type PromptMessage struct {
	Role    string          `json:"role,omitempty"`
	Content json.RawMessage `json:"content"`
}

type ProtectedResourceMetadata added in v1.1.34 

type ProtectedResourceMetadata struct {
	Resource               string   `json:"resource"`
	AuthorizationServers   []string `json:"authorization_servers"`
	ScopesSupported        []string `json:"scopes_supported,omitempty"`
	BearerMethodsSupported []string `json:"bearer_methods_supported,omitempty"`
}

ProtectedResourceMetadata represents RFC 9728 protected resource metadata.

type ReadResourceParams 

type ReadResourceParams struct {
	URI string `json:"uri"`
}

type ReadResourceResult 

type ReadResourceResult struct {
	Contents []ResourceContent `json:"contents"`
}

type Request 

type Request struct {
	JSONRPC string          `json:"jsonrpc"`
	Method  string          `json:"method"`
	Params  json.RawMessage `json:"params,omitempty"`
	ID      *ID             `json:"id,omitempty"`
}

Request is a JSON-RPC request.

type ResourceContent 

type ResourceContent struct {
	URI      string `json:"uri,omitempty"`
	MIMEType string `json:"mimeType,omitempty"`
	Text     string `json:"text,omitempty"`
	Blob     string `json:"blob,omitempty"`
}

type ResourceDefinition 

type ResourceDefinition struct {
	URI         string `json:"uri"`
	Name        string `json:"name,omitempty"`
	Description string `json:"description,omitempty"`
	MIMEType    string `json:"mimeType,omitempty"`
}

type Response 

type Response struct {
	JSONRPC string          `json:"jsonrpc"`
	Result  json.RawMessage `json:"result,omitempty"`
	Error   *Error          `json:"error,omitempty"`
	ID      json.RawMessage `json:"id,omitempty"`
}

Response is a JSON-RPC response.

func (*Response) IsError 

func (r *Response) IsError() bool

IsResponseError returns true if the response contains an error.

type ServerCaps 

type ServerCaps struct {
	Tools *struct {
		ListChanged bool `json:"listChanged,omitempty"`
	} `json:"tools,omitempty"`
}

type TokenResponse added in v1.1.34 

type TokenResponse struct {
	AccessToken  string `json:"access_token"`
	TokenType    string `json:"token_type"`
	ExpiresIn    int    `json:"expires_in"`
	RefreshToken string `json:"refresh_token,omitempty"`
	Scope        string `json:"scope,omitempty"`
	// Error fields (some providers return 200 with error body)
	Error            string `json:"error,omitempty"`
	ErrorDescription string `json:"error_description,omitempty"`
}

TokenResponse represents an OAuth 2.1 token endpoint response.

type ToolContent 

type ToolContent struct {
	Type string `json:"type"`
	Text string `json:"text,omitempty"`
}

type ToolDefinition 

type ToolDefinition struct {
	Name        string          `json:"name"`
	Description string          `json:"description,omitempty"`
	InputSchema json.RawMessage `json:"inputSchema"`
}

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