first commit

This commit is contained in:
Beyhan Oğur
2026-04-26 21:52:23 +03:00
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# Edge Case MCP Server
MCP STDIO server optimized for testing edge cases and unusual scenarios.
## Tools
- **unicode_tool** - Returns Unicode text including emojis and right-to-left characters
- **binary_data** - Returns binary-like data in various encodings (base64, hex, raw)
- **empty_response** - Returns various types of empty responses (empty string, object, array, null)
- **null_fields** - Returns responses with configurable null fields
- **deeply_nested** - Returns deeply nested data structures up to specified depth
- **special_chars** - Returns text with special characters (quotes, backslashes, newlines, control chars)
- **zero_length** - Returns zero-length content
- **extreme_sizes** - Returns data of various extreme sizes (tiny, normal, huge)
## Usage
```bash
# Install dependencies
npm install
# Build
npm run build
# Run
node dist/index.js
```
## Integration Testing
This server is designed to test edge case handling in Bifrost's MCP integration via STDIO transport.
### Example Tool Calls
```typescript
// Test Unicode handling
{
"name": "unicode_tool",
"arguments": {
"id": "test-1",
"include_emojis": true,
"include_rtl": true
}
}
// Test binary data
{
"name": "binary_data",
"arguments": {
"id": "test-2",
"encoding": "base64"
}
}
// Test deeply nested structures
{
"name": "deeply_nested",
"arguments": {
"id": "test-3",
"depth": 20
}
}
// Test special characters
{
"name": "special_chars",
"arguments": {
"id": "test-4",
"char_type": "all"
}
}
```

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module github.com/maximhq/bifrost/examples/mcps/edge-case-server
go 1.26.2
require github.com/mark3labs/mcp-go v0.43.2
require (
github.com/bahlo/generic-list-go v0.2.0 // indirect
github.com/buger/jsonparser v1.1.1 // indirect
github.com/google/uuid v1.6.0 // indirect
github.com/invopop/jsonschema v0.13.0 // indirect
github.com/mailru/easyjson v0.7.7 // indirect
github.com/spf13/cast v1.7.1 // indirect
github.com/wk8/go-ordered-map/v2 v2.1.8 // indirect
github.com/yosida95/uritemplate/v3 v3.0.2 // indirect
gopkg.in/yaml.v3 v3.0.1 // indirect
)

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github.com/bahlo/generic-list-go v0.2.0 h1:5sz/EEAK+ls5wF+NeqDpk5+iNdMDXrh3z3nPnH1Wvgk=
github.com/bahlo/generic-list-go v0.2.0/go.mod h1:2KvAjgMlE5NNynlg/5iLrrCCZ2+5xWbdbCW3pNTGyYg=
github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
github.com/invopop/jsonschema v0.13.0 h1:KvpoAJWEjR3uD9Kbm2HWJmqsEaHt8lBUpd0qHcIi21E=
github.com/invopop/jsonschema v0.13.0/go.mod h1:ffZ5Km5SWWRAIN6wbDXItl95euhFz2uON45H2qjYt+0=
github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
github.com/mark3labs/mcp-go v0.43.2 h1:21PUSlWWiSbUPQwXIJ5WKlETixpFpq+WBpbMGDSVy/I=
github.com/mark3labs/mcp-go v0.43.2/go.mod h1:YnJfOL382MIWDx1kMY+2zsRHU/q78dBg9aFb8W6Thdw=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/rogpeppe/go-internal v1.9.0 h1:73kH8U+JUqXU8lRuOHeVHaa/SZPifC7BkcraZVejAe8=
github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
github.com/spf13/cast v1.7.1 h1:cuNEagBQEHWN1FnbGEjCXL2szYEXqfJPbP2HNUaca9Y=
github.com/spf13/cast v1.7.1/go.mod h1:ancEpBxwJDODSW/UG4rDrAqiKolqNNh2DX3mk86cAdo=
github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
github.com/wk8/go-ordered-map/v2 v2.1.8 h1:5h/BUHu93oj4gIdvHHHGsScSTMijfx5PeYkE/fJgbpc=
github.com/wk8/go-ordered-map/v2 v2.1.8/go.mod h1:5nJHM5DyteebpVlHnWMV0rPz6Zp7+xBAnxjb1X5vnTw=
github.com/yosida95/uritemplate/v3 v3.0.2 h1:Ed3Oyj9yrmi9087+NczuL5BwkIc4wvTb5zIM+UJPGz4=
github.com/yosida95/uritemplate/v3 v3.0.2/go.mod h1:ILOh0sOhIJR3+L/8afwt/kE++YT040gmv5BQTMR2HP4=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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package main
import (
"context"
"encoding/base64"
"encoding/hex"
"encoding/json"
"fmt"
"os"
"github.com/mark3labs/mcp-go/mcp"
"github.com/mark3labs/mcp-go/server"
)
func main() {
// Create MCP server
s := server.NewMCPServer(
"edge-case-server",
"1.0.0",
server.WithToolCapabilities(true),
)
// Register all tools
registerReturnUnicodeTool(s)
registerReturnBinaryTool(s)
registerReturnLargePayloadTool(s)
registerReturnNestedStructureTool(s)
registerReturnNullTool(s)
registerReturnSpecialCharsTool(s)
// Start STDIO server
if err := server.ServeStdio(s); err != nil {
fmt.Fprintf(os.Stderr, "Server error: %v\n", err)
os.Exit(1)
}
}
// ============================================================================
// TOOL 1: return_unicode
// ============================================================================
func registerReturnUnicodeTool(s *server.MCPServer) {
tool := mcp.NewTool("return_unicode",
mcp.WithDescription("Returns unicode strings of various types"),
mcp.WithString("type",
mcp.Required(),
mcp.Description("Type of unicode to return"),
mcp.Enum("emoji"),
),
)
s.AddTool(tool, func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
var args struct {
Type string `json:"type"`
}
// Get arguments using the proper method
argsInterface := request.GetArguments()
// Marshal and unmarshal to convert to our struct
argsBytes, err := json.Marshal(argsInterface)
if err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Failed to marshal arguments: %v", err)), nil
}
if err := json.Unmarshal(argsBytes, &args); err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Invalid arguments: %v", err)), nil
}
var text string
switch args.Type {
case "emoji":
text = "Hello 👋 World 🌍! Testing emoji: 🎉 🚀 💻 ❤️ 🔥"
default:
return mcp.NewToolResultError(fmt.Sprintf("Unknown type: %s", args.Type)), nil
}
response := map[string]interface{}{
"type": args.Type,
"text": text,
"length": len([]rune(text)),
}
jsonResult, _ := json.Marshal(response)
return mcp.NewToolResultText(string(jsonResult)), nil
})
}
// ============================================================================
// TOOL 2: return_binary
// ============================================================================
func registerReturnBinaryTool(s *server.MCPServer) {
tool := mcp.NewTool("return_binary",
mcp.WithDescription("Returns binary data in specified encoding"),
mcp.WithNumber("size",
mcp.Required(),
mcp.Description("Size of binary data in bytes"),
),
mcp.WithString("encoding",
mcp.Required(),
mcp.Description("Encoding for binary data"),
mcp.Enum("base64", "hex"),
),
)
s.AddTool(tool, func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
var args struct {
Size int `json:"size"`
Encoding string `json:"encoding"`
}
// Get arguments using the proper method
argsInterface := request.GetArguments()
// Marshal and unmarshal to convert to our struct
argsBytes, err := json.Marshal(argsInterface)
if err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Failed to marshal arguments: %v", err)), nil
}
if err := json.Unmarshal(argsBytes, &args); err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Invalid arguments: %v", err)), nil
}
// Generate binary data (repeating pattern)
data := make([]byte, args.Size)
for i := range data {
data[i] = byte(i % 256)
}
var encoded string
switch args.Encoding {
case "base64":
encoded = base64.StdEncoding.EncodeToString(data)
case "hex":
encoded = hex.EncodeToString(data)
default:
return mcp.NewToolResultError(fmt.Sprintf("Unknown encoding: %s", args.Encoding)), nil
}
response := map[string]interface{}{
"size": args.Size,
"encoding": args.Encoding,
"data": encoded,
}
jsonResult, _ := json.Marshal(response)
return mcp.NewToolResultText(string(jsonResult)), nil
})
}
// ============================================================================
// TOOL 3: return_large_payload
// ============================================================================
func registerReturnLargePayloadTool(s *server.MCPServer) {
tool := mcp.NewTool("return_large_payload",
mcp.WithDescription("Returns a large JSON payload"),
mcp.WithNumber("size_kb",
mcp.Required(),
mcp.Description("Approximate size in kilobytes"),
),
)
s.AddTool(tool, func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
var args struct {
SizeKB int `json:"size_kb"`
}
// Get arguments using the proper method
argsInterface := request.GetArguments()
// Marshal and unmarshal to convert to our struct
argsBytes, err := json.Marshal(argsInterface)
if err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Failed to marshal arguments: %v", err)), nil
}
if err := json.Unmarshal(argsBytes, &args); err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Invalid arguments: %v", err)), nil
}
// Generate array of objects to reach target size
targetSize := args.SizeKB * 1024
items := []map[string]interface{}{}
currentSize := 0
for currentSize < targetSize {
item := map[string]interface{}{
"id": len(items),
"name": fmt.Sprintf("Item-%d", len(items)),
"description": "This is a test item with some text to increase the payload size.",
"value": len(items) * 100,
"active": len(items)%2 == 0,
"tags": []string{"tag1", "tag2", "tag3"},
}
items = append(items, item)
// Rough estimate of current size
itemJSON, _ := json.Marshal(item)
currentSize += len(itemJSON)
}
response := map[string]interface{}{
"requested_size_kb": args.SizeKB,
"item_count": len(items),
"items": items,
}
jsonResult, _ := json.Marshal(response)
return mcp.NewToolResultText(string(jsonResult)), nil
})
}
// ============================================================================
// TOOL 4: return_nested_structure
// ============================================================================
func registerReturnNestedStructureTool(s *server.MCPServer) {
tool := mcp.NewTool("return_nested_structure",
mcp.WithDescription("Returns deeply nested JSON structure"),
mcp.WithNumber("depth",
mcp.Required(),
mcp.Description("Depth of nesting"),
),
)
s.AddTool(tool, func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
var args struct {
Depth int `json:"depth"`
}
// Get arguments using the proper method
argsInterface := request.GetArguments()
// Marshal and unmarshal to convert to our struct
argsBytes, err := json.Marshal(argsInterface)
if err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Failed to marshal arguments: %v", err)), nil
}
if err := json.Unmarshal(argsBytes, &args); err != nil {
return mcp.NewToolResultError(fmt.Sprintf("Invalid arguments: %v", err)), nil
}
// Build nested structure
nested := buildNestedStructure(args.Depth)
response := map[string]interface{}{
"depth": args.Depth,
"data": nested,
}
jsonResult, _ := json.Marshal(response)
return mcp.NewToolResultText(string(jsonResult)), nil
})
}
func buildNestedStructure(depth int) map[string]interface{} {
if depth <= 0 {
return map[string]interface{}{
"level": 0,
"value": "leaf node",
}
}
return map[string]interface{}{
"level": depth,
"child": buildNestedStructure(depth - 1),
"data": map[string]interface{}{
"id": depth,
"name": fmt.Sprintf("Level %d", depth),
},
}
}
// ============================================================================
// TOOL 5: return_null
// ============================================================================
func registerReturnNullTool(s *server.MCPServer) {
tool := mcp.NewTool("return_null",
mcp.WithDescription("Returns null/empty values in various forms"),
)
s.AddTool(tool, func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
response := map[string]interface{}{
"null_value": nil,
"empty_string": "",
"empty_array": []interface{}{},
"empty_object": map[string]interface{}{},
"zero": 0,
"false": false,
}
jsonResult, _ := json.Marshal(response)
return mcp.NewToolResultText(string(jsonResult)), nil
})
}
// ============================================================================
// TOOL 6: return_special_chars
// ============================================================================
func registerReturnSpecialCharsTool(s *server.MCPServer) {
tool := mcp.NewTool("return_special_chars",
mcp.WithDescription("Returns strings with special characters and escape sequences"),
)
s.AddTool(tool, func(ctx context.Context, request mcp.CallToolRequest) (*mcp.CallToolResult, error) {
response := map[string]interface{}{
"quotes": `He said "Hello" and she said 'Hi'`,
"backslashes": `C:\Users\Test\Path`,
"newlines": "Line 1\nLine 2\nLine 3",
"tabs": "Col1\tCol2\tCol3",
"mixed": "Special: \t\n\r\\ \" ' / @ # $ % & * ( )",
"unicode_escape": "\u0041\u0042\u0043", // ABC
"control_chars": "\x00\x01\x02",
}
jsonResult, _ := json.Marshal(response)
return mcp.NewToolResultText(string(jsonResult)), nil
})
}

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{
"name": "edge-case-server",
"version": "1.0.0",
"description": "MCP STDIO server optimized for testing edge cases and unusual scenarios",
"type": "module",
"bin": {
"edge-case-server": "./dist/index.js"
},
"scripts": {
"build": "tsc && chmod +x dist/index.js",
"prepare": "npm run build"
},
"dependencies": {
"@modelcontextprotocol/sdk": "^1.0.4",
"zod": "^3.24.1"
},
"devDependencies": {
"@types/node": "^20.10.0",
"typescript": "^5.3.3"
},
"overrides": {
"hono": "4.12.14"
}
}

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#!/usr/bin/env node
import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import {
CallToolRequestSchema,
ListToolsRequestSchema,
} from "@modelcontextprotocol/sdk/types.js";
import { z } from "zod";
// Schemas for edge case test tools
const UnicodeToolSchema = z.object({
id: z.string().describe("Tool invocation ID"),
include_emojis: z.boolean().optional().describe("Include emoji characters"),
include_rtl: z.boolean().optional().describe("Include right-to-left text"),
});
const BinaryDataSchema = z.object({
id: z.string().describe("Tool invocation ID"),
encoding: z.enum(["base64", "hex", "raw"]).optional(),
});
const EmptyResponseSchema = z.object({
id: z.string().describe("Tool invocation ID"),
type: z.enum(["empty_string", "empty_object", "empty_array", "null"]).optional(),
});
const NullFieldsSchema = z.object({
id: z.string().describe("Tool invocation ID"),
null_count: z.number().optional().describe("Number of null fields to include"),
});
const DeeplyNestedSchema = z.object({
id: z.string().describe("Tool invocation ID"),
depth: z.number().optional().describe("Nesting depth (default 10)"),
});
const SpecialCharsSchema = z.object({
id: z.string().describe("Tool invocation ID"),
char_type: z.enum(["quotes", "backslashes", "newlines", "control_chars", "all"]).optional(),
});
const ZeroLengthSchema = z.object({
id: z.string().describe("Tool invocation ID"),
});
const ExtremeSizesSchema = z.object({
id: z.string().describe("Tool invocation ID"),
size_type: z.enum(["tiny", "normal", "huge"]).optional(),
});
const server = new Server(
{ name: "edge-case-server", version: "1.0.0" },
{ capabilities: { tools: {} } }
);
server.setRequestHandler(ListToolsRequestSchema, async () => ({
tools: [
{
name: "unicode_tool",
description: "Returns Unicode text including emojis and RTL characters",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
include_emojis: {
type: "boolean",
description: "Include emoji characters",
},
include_rtl: {
type: "boolean",
description: "Include right-to-left text",
},
},
required: ["id"],
},
},
{
name: "binary_data",
description: "Returns binary-like data in various encodings",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
encoding: {
type: "string",
enum: ["base64", "hex", "raw"],
description: "Data encoding format",
},
},
required: ["id"],
},
},
{
name: "empty_response",
description: "Returns various types of empty responses",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
type: {
type: "string",
enum: ["empty_string", "empty_object", "empty_array", "null"],
description: "Type of empty response",
},
},
required: ["id"],
},
},
{
name: "null_fields",
description: "Returns responses with null fields",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
null_count: {
type: "number",
description: "Number of null fields to include",
},
},
required: ["id"],
},
},
{
name: "deeply_nested",
description: "Returns deeply nested data structures",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
depth: {
type: "number",
description: "Nesting depth (default 10)",
},
},
required: ["id"],
},
},
{
name: "special_chars",
description: "Returns text with special characters that need escaping",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
char_type: {
type: "string",
enum: ["quotes", "backslashes", "newlines", "control_chars", "all"],
description: "Type of special characters to include",
},
},
required: ["id"],
},
},
{
name: "zero_length",
description: "Returns zero-length content",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
},
required: ["id"],
},
},
{
name: "extreme_sizes",
description: "Returns data of various extreme sizes",
inputSchema: {
type: "object",
properties: {
id: { type: "string" },
size_type: {
type: "string",
enum: ["tiny", "normal", "huge"],
description: "Size category",
},
},
required: ["id"],
},
},
],
}));
server.setRequestHandler(CallToolRequestSchema, async (request) => {
const toolName = request.params.name;
try {
switch (toolName) {
case "unicode_tool": {
const args = UnicodeToolSchema.parse(request.params.arguments);
let text = "Unicode test: ";
// Basic Unicode characters
text += α β γ δ ε ζ η θ ";
if (args.include_emojis) {
text += "😀 😎 🔧 🚀 🎉 🌟 💻 🐍 ";
}
if (args.include_rtl) {
text += "مرحبا 你好 שלום ";
}
// Additional Unicode ranges
text += "© ® ™ € £ ¥ ";
return {
content: [
{
type: "text",
text: JSON.stringify({
tool: "unicode_tool",
id: args.id,
unicode_text: text,
include_emojis: args.include_emojis ?? false,
include_rtl: args.include_rtl ?? false,
}),
},
],
};
}
case "binary_data": {
const args = BinaryDataSchema.parse(request.params.arguments);
const encoding = args.encoding || "base64";
const binaryData = Buffer.from("This is binary data \x00\x01\x02\x03\xff\xfe");
let encodedData: string;
switch (encoding) {
case "base64":
encodedData = binaryData.toString("base64");
break;
case "hex":
encodedData = binaryData.toString("hex");
break;
case "raw":
encodedData = binaryData.toString("binary");
break;
}
return {
content: [
{
type: "text",
text: JSON.stringify({
tool: "binary_data",
id: args.id,
encoding,
data: encodedData,
}),
},
],
};
}
case "empty_response": {
const args = EmptyResponseSchema.parse(request.params.arguments);
const type = args.type || "empty_string";
let responseData: any;
switch (type) {
case "empty_string":
responseData = "";
break;
case "empty_object":
responseData = {};
break;
case "empty_array":
responseData = [];
break;
case "null":
responseData = null;
break;
}
return {
content: [
{
type: "text",
text: JSON.stringify({
tool: "empty_response",
id: args.id,
type,
data: responseData,
}),
},
],
};
}
case "null_fields": {
const args = NullFieldsSchema.parse(request.params.arguments);
const nullCount = args.null_count || 3;
const response: any = {
tool: "null_fields",
id: args.id,
};
// Add null fields
for (let i = 0; i < nullCount; i++) {
response[`null_field_${i + 1}`] = null;
}
response.non_null_field = "This is not null";
return {
content: [
{
type: "text",
text: JSON.stringify(response),
},
],
};
}
case "deeply_nested": {
const args = DeeplyNestedSchema.parse(request.params.arguments);
const depth = args.depth || 10;
// Create deeply nested structure
let nested: any = { value: "leaf" };
for (let i = 0; i < depth; i++) {
nested = {
level: depth - i,
child: nested,
};
}
return {
content: [
{
type: "text",
text: JSON.stringify({
tool: "deeply_nested",
id: args.id,
depth,
data: nested,
}),
},
],
};
}
case "special_chars": {
const args = SpecialCharsSchema.parse(request.params.arguments);
const charType = args.char_type || "all";
let text = "";
if (charType === "quotes" || charType === "all") {
text += 'Text with "double quotes" and \'single quotes\' ';
}
if (charType === "backslashes" || charType === "all") {
text += "Path: C:\\Users\\Test\\file.txt ";
}
if (charType === "newlines" || charType === "all") {
text += "Line 1\nLine 2\r\nLine 3\tTabbed ";
}
if (charType === "control_chars" || charType === "all") {
text += "Control: \x00 \x01 \x1F ";
}
return {
content: [
{
type: "text",
text: JSON.stringify({
tool: "special_chars",
id: args.id,
char_type: charType,
text,
}),
},
],
};
}
case "zero_length": {
const args = ZeroLengthSchema.parse(request.params.arguments);
return {
content: [
{
type: "text",
text: "",
},
],
};
}
case "extreme_sizes": {
const args = ExtremeSizesSchema.parse(request.params.arguments);
const sizeType = args.size_type || "normal";
let data: string;
switch (sizeType) {
case "tiny":
data = "x";
break;
case "normal":
data = "x".repeat(1000);
break;
case "huge":
data = "x".repeat(1000000); // 1MB
break;
}
return {
content: [
{
type: "text",
text: JSON.stringify({
tool: "extreme_sizes",
id: args.id,
size_type: sizeType,
data_length: data.length,
data,
}),
},
],
};
}
default:
throw new Error(`Unknown tool: ${toolName}`);
}
} catch (error) {
return {
content: [
{
type: "text",
text: `Error: ${error instanceof Error ? error.message : String(error)}`,
},
],
isError: true,
};
}
});
async function main() {
const transport = new StdioServerTransport();
await server.connect(transport);
console.error("Edge Case MCP Server running on stdio");
}
main().catch((error) => {
console.error("Fatal error:", error);
process.exit(1);
});

View File

@@ -0,0 +1,17 @@
{
"compilerOptions": {
"target": "ES2022",
"module": "Node16",
"moduleResolution": "Node16",
"outDir": "./dist",
"rootDir": "./src",
"strict": true,
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true,
"resolveJsonModule": true,
"declaration": true
},
"include": ["src/**/*"],
"exclude": ["node_modules", "dist"]
}