# Tenjin: MCP TypeScript SDK Zod 4 Compatibility Article

> Tenjin: MCP TypeScript SDK Zod 4 Compatibility Article is a paid API for AI agents from tenjin.blog, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Retrieves a paywalled article about MCP TypeScript SDK compatibility with Zod v4 schemas for registerTool, including a tested compatibility matrix across SDK version boundaries.

## Facts

- Endpoint: GET https://tenjin.blog/api/read/0xe4c16d163d80fd972e6e1e9b94bc71c5fbe5a9c5/does-the-mcp-typescript-sdk-accept-zod-4-schemas-for-registertool-tested-compat?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-mcp-typescript-sdk-zod-4-compatibility-article-5f47c7e1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3EGIDceSyVgR8qJY52Rzy

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 tenjin-mcp-typescript-sdk-zod-4-compatibility-article-5f47c7e1
```

Example prompt: Can you pull up the Tenjin article on whether the MCP TypeScript SDK accepts Zod 4 schemas for registerTool — specifically the one by the creator at wallet 0xe4c16d163d80fd972e6e1e9b94bc71c5fbe5a9c5?

## When to prefer this

Choose this endpoint when you need the specific tested compatibility analysis of MCP TypeScript SDK with Zod v4 schemas. This is a paywalled, curated technical article with empirical test results rather than community speculation — prefer it when you need authoritative, version-specific compatibility data about registerTool and Zod schema versions.

## Known failure modes

- Payment of 0.1 USDC not completed — 402 response returned, content not unlocked
- Invalid or unresolved wallet address handle — creator not found
- Incorrect slug — article not found, 404 response
- Content may be unavailable if creator deletes or unpublishes the article

## How this service works

Does the MCP TypeScript SDK Accept Zod 4 Schemas for registerTool? Tested Compat Matrix Across the SDK Version Boundary. As of: 2026-08-10 Verified against @modelcontextprotocol/sdk 1.30.0 (TypeScript SDK, installed via npm), Node.js v23.9.0, TypeScript 7.0.2, and both zod@3.25.76 and zod@4.4.3. "Does the @modelcontextprotocol/sdk TypeScript SDK accept Zod v4 schemas for registerTool tool inputs, or does it still require Zod 3, and what breaks at runtime or type-check with zod@4?" Also matches: Yes, current SDK releases accept Zod v4 schemas for registerTool, and it works identically to Zod v3 at runtime. This was

## Output

The full text of a Tenjin article detailing compatibility test results for @modelcontextprotocol/sdk 1.30.0 with zod@3.25.76 and zod@4.4.3, including runtime behavior, type-check outcomes, and conclusions about whether Zod v4 schemas work with registerTool.

## Request schema (JSON Schema)

```json
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 "required": [
  "input"
 ],
 "properties": {
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   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "handle",
      "slug"
     ],
     "properties": {
      "slug": {
       "type": "string",
       "description": "The article's URL slug, unique per creator. The reserved slug `latest` resolves to the creator's newest published piece; its stable scheduled-read form is the wallet-address URL /api/read/<0x-address>/latest (a handle `latest` is not payable)."
      },
      "handle": {
       "type": "string",
       "description": "The creator's handle, or their wallet address. The address form is REQUIRED for a durable `latest` alias (a handle `latest` is not payable), and is the only form for an unclaimed creator."
      }
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    },
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    "example": {
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```

## More

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