Peptide Library

Name: Peptide Library
Author: ryandelauz

by ryandelauzversion 1.0.1i★ –iRuns in the cloud

Registry nameapp.peptidelibrary/peptide-library

Install

Overview

Description from the maker (original English)

Peptide research profiles, evidence by tier, comparisons and educational content. No dosing.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Search & AI memory

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://peptidelibrary.app/mcp

Run this in your terminal

claude mcp add --transport http peptide-library https://peptidelibrary.app/mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "peptide-library": {
      "url": "https://peptidelibrary.app/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "peptide-library": {
      "type": "http",
      "url": "https://peptidelibrary.app/mcp"
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://peptidelibrary.app/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain peptidelibrary.app (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Search & AI memoryi

More stars than 0% of the other 5655 servers in this category
Published to the registry more recently than 64% of the other 5655 servers in this category
Basic checks equal to or better than 100% of the other 5655 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Peptide Library safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.1) reached the registry 23 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated yesterday

Install

Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 21 days ago

Install

Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated 2 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Peptide Library MCP Server

A remote Model Context Protocol server providing structured peptide research information, educational comparison tools, and research resources for compatible AI assistants.

Website: https://peptidelibrary.app Server URL: https://peptidelibrary.app/mcp Documentation: https://peptidelibrary.app/developers/mcp

The server is hosted by Peptide Library. It is free, anonymous and read-only: no account, no API key and nothing to install. This repository holds its public documentation, client configuration examples and registry metadata; the server itself runs from Peptide Library's private codebase.

What it does

Tool	Description
`search_peptides`	Fuzzy search by name, synonym or alias, with research-category and research-area filters and pagination
`get_peptide_details`	Research profile: classification, mechanism and targets, evidence by tier (regulatory label, controlled human trials, other human studies, animal and in-vitro research) with cited sources, safety, FDA/WADA status, review dates
`compare_peptides`	Side-by-side comparison of 2 or 3 profiles on structured fields; never ranks
`search_research`	Search Peptide Library's FAQ, per-peptide FAQs, articles and courses, with links
`get_peptide_categories`	Research categories with descriptions, counts and member profiles
`get_research_trends`	This week's most-researched peptides in the community, as percentages
`convert_units`	mg ↔ mcg, and IU only with a peptide's documented IU-per-mg factor
`solution_concentration`	Amount ÷ volume as mg/mL, mcg/mL (IU/mL with a documented factor)
`blend_concentrations`	Per-component concentration and share in one volume
`cost_per_amount`	Total cost and cost per mg/mcg/IU from a price you enter

Resources: peptidelibrary://categories, peptidelibrary://evidence-levels, peptidelibrary://methodology, peptidelibrary://glossary, peptidelibrary://disclaimer, peptidelibrary://peptide/{id}.

Prompts: compare_peptide_research, summarize_peptide_evidence, explain_mechanism, find_research_topics, understand_research_limitations.

Every result includes the Peptide Library URL it came from and a research-use disclaimer. Fields the library doesn't have are returned as not_documented.

What it will not do

Give doses, regimens, cycles, reconstitution or injection instructions.
List vendors, prices or purchase links.
Read or change any account or personal data.
Rank peptides or invent studies or citations.

Research and educational use only. Not medical advice. Peptide Library does not sell peptides.

Connect

Claude (claude.ai and Claude Desktop)

Customize → Connectors → Add custom connector → name Peptide Library, URL https://peptidelibrary.app/mcp. On Team and Enterprise plans an owner adds it under Organization settings → Connectors. Free plans allow one custom connector.

Claude Code

claude mcp add --transport http peptide-library https://peptidelibrary.app/mcp

ChatGPT

Where your plan or workspace allows custom MCP servers: Plugins → + → Add custom MCP server → URL https://peptidelibrary.app/mcp, Authentication No authentication → Create as a plugin. Then type @ in a chat to use it. See examples/chatgpt.md.

Cursor

~/.cursor/mcp.json (or .cursor/mcp.json in a project): examples/cursor-mcp.json

{ "mcpServers": { "peptide-library": { "url": "https://peptidelibrary.app/mcp" } } }

VS Code

.vscode/mcp.json: examples/vscode-mcp.json

Cline

Cline → MCP Servers → Configure MCP Servers, then add the entry from llms-install.md ("type": "streamableHttp", "url": "https://peptidelibrary.app/mcp"). Agents installing the server can follow that file directly.

Any MCP client

Streamable HTTP at https://peptidelibrary.app/mcp, no authentication. Generic config: examples/mcp.json.

MCP Inspector

npx -y @modelcontextprotocol/inspector --cli https://peptidelibrary.app/mcp --transport http --method tools/list

Example questions

What does the research say about BPC-157, and how much of it is in humans?
Compare semaglutide and tirzepatide: mechanism, evidence and regulatory status.
Which peptides in the library are studied for cognition?
What is the FDA and WADA status of bremelanotide (PT-141)?
If 10 mg is dissolved in 2 mL, what is the concentration in mcg/mL?

Endpoint details

Transport: Streamable HTTP (POST), stateless. Protocol revision 2026-07-28 and 2025-era clients (2024-11-05 to 2025-11-25).
Authentication: none; every tool is read-only (readOnlyHint: true).
Limits: about 300 requests per minute per IP, 64 KB per request, 25 results per page.
Health check: GET https://peptidelibrary.app/mcp/health.

Privacy

No account and no personal data. Peptide Library keeps daily counts of requests, tool calls, errors and the client name your assistant reports; it does not store tool arguments, results or IP addresses. The hosting provider processes IPs to apply rate limits. Full policy: https://peptidelibrary.app/privacy#mcp-server

Data

Profiles follow Peptide Library's editorial policy and methodology: claims cite PubMed, DOI, trial registries and FDA or WADA records, and evidence is labelled by kind.

REST API

The same research data (plus the vendor directory and prices, with a free key) is available as a REST API for apps and scripts: https://api.peptidelibrary.app/v1, with an OpenAPI 3.1 spec, Postman collection and TypeScript and Python SDKs. Docs: https://peptidelibrary.app/developers · Repo: https://github.com/ryandelauz/peptide-library-api

License

Documentation and examples in this repository: MIT. The hosted service and Peptide Library content are subject to the terms of service.

Peptide Library

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Search & AI memoryi

Common questions

Alternatives

Context7

Codebase Memory

Exa

README from the maker

Peptide Library MCP Server

What it does

What it will not do

Connect

Claude (claude.ai and Claude Desktop)

Claude Code

ChatGPT

Cursor

VS Code

Cline

Any MCP client

MCP Inspector

Example questions

Endpoint details

Privacy

Data

REST API

Links

License