# Saylor Innovations Guide Library - MCP Server TypeScript SDK & Zod Validation

> Saylor Innovations Guide Library - MCP Server TypeScript SDK & Zod Validation is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Retrieves a knowledge base guide on building and testing a TypeScript MCP server using registerTool, Zod input validation, -32602 errors, isError results, and in-memory client patterns

## Facts

- Endpoint: GET https://saylorinnovations.com/api/kb/mcp-server-typescript-sdk-zod-input-validation-tool-errors-test?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-guide-library-mcp-server-typescript-sdk-zod-41cf4189
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_g7cad-o0d39RSRa6HjUbU

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability saylor-innovations-guide-library-mcp-server-typescript-sdk-zod-41cf4189
```

Example prompt: Pull up the Saylor Innovations guide on building and testing a TypeScript MCP server — I specifically need help with registerTool, Zod input validation, -32602 errors, isError results, and setting up an in-memory client.

## When to prefer this

Choose this endpoint when you need a structured, curated developer guide specifically about building TypeScript MCP servers with Zod input validation, registerTool patterns, and in-memory testing — rather than generic documentation or community forums. Ideal for AI agents assisting developers who need authoritative, formatted reference content on MCP SDK patterns.

## Known failure modes

- Guide not found or endpoint returns empty/null body
- Network timeout or server unavailability
- Payment not processed resulting in 402 response
- Malformed response if guide content is unavailable
- Schema mismatch if required fields (id, t, c, body) are missing from response

## How this service works

Build and test a TypeScript MCP server - registerTool with zod, published inputSchema, -32602 validation errors, isError results, in-memory client

## Output

Returns a JSON object containing the guide's unique ID, title, category, main body text, license identifier, and optional price. The body field contains the full textual content of the guide covering TypeScript MCP server setup with Zod validation, registerTool usage, -32602 error handling, isError result patterns, and in-memory client testing.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "id",
      "t",
      "c",
      "body"
     ],
     "properties": {
      "c": {
       "type": "string",
       "description": "Category of the guide"
      },
      "t": {
       "type": "string",
       "description": "Title of the guide"
      },
      "id": {
       "type": "string",
       "description": "Identifier of the record"
      },
      "body": {
       "type": "string",
       "description": "Main body text"
      },
      "price": {
       "type": [
        "number",
        "null"
       ],
       "description": "Price"
      },
      "license": {
       "type": "string",
       "description": "License identifier"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-guide-library-mcp-server-typescript-sdk-zod-41cf4189/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)