18+ and educational only: not medical advice.
MyPeps

Free. No account, no key.

Ask your AI. Get our math.

Chatbots guess at peptide math. Connect MyPeps and ChatGPT or Claude runs the same calculator this site does, then hands you a link that shows the syringe drawn to your dose.

Get the connector URL

The connector URL

An MCP server: the standard way AI assistants plug into tools. Three read-only tools: calculate_reconstitution, get_peptide_facts, list_peptides.

Add it to Claude

  1. 1

    Open Settings → Connectors

    On claude.ai or the Claude app. (Claude Code: claude mcp add --transport http mypeps https://www.mypeps.info/mcp)
  2. 2

    Add custom connector

    Name it MyPeps and paste the URL above. No sign-in needed.
  3. 3

    Ask away

    Turn it on in a chat from the tools menu, then ask a peptide question.

Add it to ChatGPT

  1. 1

    Settings → Apps & Connectors → Advanced

    Turn on developer mode (Plus, Pro, Business and up).
  2. 2

    Create a connector

    Paste the URL above, choose No authentication, and save.
  3. 3

    Use it in a chat

    Pick MyPeps from the + menu under Developer mode, then ask.

Building your own GPT? Import our API in the Actions editor from https://www.mypeps.info/openapi.json (privacy policy: https://www.mypeps.info/privacy).

Try asking

  • “I have a 10 mg vial of tirzepatide and 2 mL of water. How many units is 2.5 mg?”
  • “How much water should I add to a 5 mg BPC-157 vial so 250 mcg is 10 units?”
  • “What's the evidence for GHK-Cu, and is it FDA approved?”
  • “Compare the legal status of semaglutide and retatrutide.”

What it will and won’t do

  • Exact arithmetic from the same engine as our calculator, with a link that opens your setup.
  • Facts from our peptide pages: evidence rating (how we rate), FDA, international and WADA status, storage, side effects.
  • No dose recommendations, no prices, no shop links. It’s math and published research, not medical advice.
  • We see which tool was called and how often, not your chat. See our privacy policy.

For AI crawlers and answer engines: llms.txt.