mcp-server: Instructions file for Claude Code

CLAUDE.md

mcp-server CLAUDE.md is an instructions file for Claude Code from Synter-Media-AI/mcp-server. It costs 592 tokens per session, scanned A, original, MIT.

A set of Claude Code instructions for maintaining a public MCP server package and its related projects. MCP is a standard way for AI tools to connect to external tools and data.

In plain words
What is it for?
Use it when changing, publishing, or operating the @synterai/mcp-server package and its public tools.
Why use it?
It prevents changes that expose private information, use the wrong project or account, skip API checks, or fail to update related documentation and versions.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions Claude Code.

This is Synter-Media-AI/mcp-server's own configuration. It tells Claude Code how to work on mcp-server itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything mcp-server configures →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/joelhorwitz/work/mcp-server/.

Reuse

Borrowing it

Nothing to install: this file belongs to Synter-Media-AI/mcp-server. 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/Synter-Media-AI/mcp-server/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/Synter-Media-AI/mcp-server

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.

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README.md
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Your own site
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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.

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Your own site · 80×15
<a href="https://agentmods.dev/instructions/synter-media-ai/mcp-server/claude-md"><img src="https://agentmods.dev/badge/instructions/synter-media-ai/mcp-server/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 592 This file is loaded in full into every session.
When invoked 592 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00592 $0.00592
Opus 5.5 $0.00237 $0.00237
Sonnet 5.5 $0.00118 $0.00118
Haiku 4.5 $0.00059 $0.00059

Measured yesterday against content hash 6e7e5bd8e152, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-server 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 yesterday.

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 · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Claude Code Instructions — @synterai/mcp-server

Project Ecosystem

This is the @synterai/mcp-server — the public-facing MCP SDK that wraps the synter-media backend.

Project Relationship Rules of engagement
synter-media This SDK wraps synter-media's API. Changes to synter-media's API surface may require updates here. Always check synter-media's route definitions before adding/changing tools. Never expose internal synter-media endpoints that aren't intended to be public. Version-bump before publishing.
synter-docs Docs for this SDK live in synter-docs. When tools change here, flag synter-docs needs updating.
jobs-outreach-engine No direct dependency. —
gumshoe Completely separate. Never reference Gumshoe in this package.

This is a published npm package (@synterai/mcp-server). Everything here is public. No internal credentials, account IDs, or proprietary logic.


CRITICAL: Workspace & Account Verification

BEFORE any action that touches an external system, verify you are in the mcp-server project.

Check Expected value Action if wrong
Working directory /Users/joelhorwitz/work/mcp-server/ STOP — ask user to confirm
Package name @synterai/mcp-server (check package.json) STOP if different
GitHub repo mcp-server repo — NOT jshorwitz/synter-media STOP before any push
npm/registry Publishing to @synterai scope only Confirm before npm publish
Deployment target syntermedia.ai MCP endpoint — NOT production Synter app Confirm before deploy

This MCP server is a public-facing SDK used by external developers. Any breaking change, bad publish, or accidental credentials exposure affects all users of the package.

Additional safety rules

  • Never hardcode API keys, tokens, or secrets in source files.
  • Always bump the version in package.json before publishing.
  • Test locally with node dist/index.js before publishing to npm.
  • The skills/ and agents/ directories contain Synter-specific configs — do not expose internal Synter account IDs or API endpoints in published code.

Read the full file on GitHub · 46 lines

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.

  1. yesterday First seen · 46 lines · 592 tokens per session scan A 6e7e5bd8e152

Subscribe to this mod's changes

mcp-server CLAUDE.md is an instructions file published in the GitHub repository Synter-Media-AI/mcp-server (20 stars, last pushed yesterday), licensed MIT. It adds 592 tokens to every session, about $0.0024 per session on Opus 5.5. 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 2026-10-17.

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