What is synthetic-web-search-mcp CLAUDE.md?

Project instructions for synthetic-web-search-mcp, an MCP server that exposes Synthetic's web-search API as one tool called search_web.

Use them when building, running, watching, or testing the search server, or when changing its TypeScript tool and API integration.

They describe the API request flow, required API key, transport, and commands for development and manual testing, so changes can be made in the right place.

How parnexcodes/synthetic-web-search-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to parnexcodes/synthetic-web-search-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/parnexcodes/synthetic-web-search-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/parnexcodes/synthetic-web-search-mcp

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/parnexcodes/synthetic-web-search-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/parnexcodes/synthetic-web-search-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/parnexcodes/synthetic-web-search-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/parnexcodes/synthetic-web-search-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/parnexcodes/synthetic-web-search-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/parnexcodes/synthetic-web-search-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 404 This file is loaded in full into every session.

When invoked 404 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00404	$0.00404
Opus 5	$0.00202	$0.00202
Sonnet 5	$0.00081	$0.00081
Haiku 4.5	$0.00040	$0.00040

Measured 10d ago against content hash 7d0dc19b2e60, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

synthetic-web-search-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 59 lines

What it actually says

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

This is a Model Context Protocol (MCP) server that exposes Synthetic's web search API as an MCP tool. It provides a single search_web tool for performing web searches.

Development Commands

# Build the project
npm run build

# Development mode (run with ts-node)
npm run dev

# Watch for changes and auto-rebuild
npm run watch

# Run the compiled server
npm start

# Test with MCP Inspector
npx @modelcontextprotocol/inspector synthetic-web-search-mcp

Architecture

The server is implemented as a single-file MCP server (src/index.ts) with:

Transport: StdioServerTransport for CLI/Claude Desktop integration
Single Tool: search_web with one required argument (query)
API Endpoint: https://api.synthetic.new/v2/search

The code flow:

Server initializes and validates SYNTHETIC_API_KEY environment variable
Server advertises the search_web tool via ListToolsRequestSchema
Clients call the tool via CallToolRequestSchema
Server makes POST request to Synthetic API with Bearer token auth
Results returned as formatted JSON

Testing

No automated tests exist. Test manually using MCP Inspector:

npx @modelcontextprotocol/inspector synthetic-web-search-mcp

The MCP Inspector runs the server via stdio and provides a UI to invoke tools.

Notes

This is an ES Module project (package.json has "type": "module")
TypeScript strict mode is enabled (in tsconfig.json)
No linting or formatting tools are configured
The server exits with code 1 if SYNTHETIC_API_KEY is not set

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

10d ago First seen · 59 lines · 404 tokens per session scan A 7d0dc19b2e60

Subscribe to this mod's changes

synthetic-web-search-mcp CLAUDE.md is an instructions file published in the GitHub repository parnexcodes/synthetic-web-search-mcp (22 stars, last pushed 5mo ago), licensed MIT. It adds 404 tokens to every session, about $0.0020 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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synthetic-web-search-mcp: Instructions file for Claude Code