ToolSchema Forge

dev.workers.toolschemaforge.toolschema-forgePublished by toolschema-forge.toolschemaforge.workers.devOfficial publisherv1.1.0Updated Oct 25, 2026

Convert, lint and generate LLM tool schemas for OpenAI, Anthropic, Gemini and MCP

VerifiedStreamable HTTPWeb executableDeveloper ToolsAI & ML

Overview

AI-generated overview

A remote MCP server that converts, lints and generates LLM tool schemas for OpenAI, Anthropic, Gemini and MCP, and turns OpenAPI specs into tool definitions.

What you can do
Convert a single tool definition between OpenAI, OpenAI strict mode, Anthropic, Gemini, MCP and plain JSON Schema, with the input format auto-detected and every change reported as an issue with a JSON pointer. Lint a tool definition against each provider's schema rules and get errors, warnings and suggested fixes. Turn an OpenAPI 3.x or Swagger 2.0 spec into one LLM tool definition per operation. Batch-convert up to 50 tool definitions at once with per-tool issues and ready-to-use bundles. Generate an MCP server manifest with inputSchema, titles, annotations and HTTP bindings, plus a TypeScript stdio server stub.
When to use it
Useful when moving tool or function definitions between LLM providers, checking that a definition will pass a provider's strict schema rules, or bootstrapping MCP tools and a server stub from an existing OpenAPI spec.
Requirements
A remote streamable HTTP endpoint; no local runtime, account, API key or headers are declared. The free tier allows 5 calls per hour per IP with arguments up to 8 KB; beyond that, calls are paid per call in USDC on Base via x402, with payment passed in the request metadata.
Before you install
Usage beyond the free tier costs money: calls are charged in USDC on Base through x402, with per-call prices ranging from about 0.005 to 0.15 USDC depending on the tool. Tool definitions and OpenAPI specs you submit are sent to a third-party remote service. The free tier is limited to 5 calls per hour per IP and 8 KB of arguments.

Installation

In SourceWeft

  1. Open ToolSchema Forge in the dashboard and add it to a workspace.
  2. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/dev.workers.toolschemaforge.toolschema-forge%2Ftoolschema-forge/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "toolschema-forge": {
      "type": "http",
      "url": "https://toolschema-forge.toolschemaforge.workers.dev/mcp"
    }
  }
}

Tools

5

convert_tool_schema

Convert tool schema

Convert one LLM tool/function definition between OpenAI, OpenAI strict mode, Anthropic, Gemini, MCP and plain JSON Schema. The input format is auto-detected. Every change is reported as an issue with a JSON pointer. Free: 5 calls/hour per IP with arguments up to 8 KB; then $0.01 USDC per call via x402.

Parameterstoolrequiredtargets

lint_tool_schema

Lint tool schema

Check one LLM tool definition against each provider's schema rules (OpenAI strict, Anthropic, Gemini, MCP) and report errors and warnings with fixes. Free: 5 calls/hour per IP with arguments up to 8 KB; then $0.005 USDC per call via x402.

Parameterstoolrequiredtargets

openapi_to_tools

OpenAPI to tools

Turn an OpenAPI 3.x or Swagger 2.0 spec (JSON object) into LLM tool definitions in the chosen format, one tool per operation. Free: 5 calls/hour per IP with arguments up to 8 KB; then $0.02 USDC per call via x402.

ParametersspecrequiredtargetincludemaxTools

batch_convert_tool_schemas

Batch convert tool schemas

Convert up to 50 tool definitions at once to the chosen formats, with per-tool issues and ready-to-use bundles. Free: 5 calls/hour per IP with arguments up to 8 KB; then $0.05 USDC per call via x402.

Parameterstoolsrequiredtargets

mcp_manifest

MCP manifest + server stub

Generate an MCP server manifest (tools with inputSchema, titles, annotations, HTTP bindings) and a TypeScript stdio server stub from an OpenAPI spec or a list of tools. Free: 5 calls/hour per IP with arguments up to 8 KB; then $0.15 USDC per call via x402.

Parameterstoolsserverincludeopenapi

Version history

1
  1. v1.1.0LatestOct 25, 2026

Score

72% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listedRequired15 pts
  • DescriptionRequired15 pts
  • Logo10 pts

    Publish an icon in the registry entry.

  • Documentation15 pts

    Declare a GitHub repository with a README, or serve resource_documentation in the OAuth protected-resource metadata.

  • LicenseNot applicable

    A hosted service is used under its provider's terms, so no license is expected here. This check is left out of the percentage.