Peptul MCP

An official read-only MCP server providing access to Peptul's open research peptide data, including live price comparisons, price history, vendor transparency scores, and a reconstitution calculator for educational purposes.

Endpoint and access

No sign-in to connect and list tools. Individual tools may still need a vendor account, credentials, or permissions; check the documented prerequisites.

Vendor evidenceStreamable HTTPNo sign-inEndpoint checked 2026-11-06Operated by Peptul

MCP endpoint (Streamable HTTP)

https://www.peptul.com/api/mcp

Vendor documentation

What its tools do

5 tools, grouped by the hints the server advertises. Hints are self-declared, not verified behavior.

Not annotated (5)

get_compound_prices
get_vendor
get_price_history
calculate_reconstitution
search_vendors

5 of 5 have a description · 0 of 5 declare behavior hints · 5 of 5 with parameters document them all

Checks and signals

Each line is separate evidence, not a trust score.

Passed Endpoint answered the live check · Nov 6, 2026, 11:15 PM UTC
Passed Official MCP Registry namespace is tied to peptul.com · Nov 6, 2026, 10:43 PM UTC
Passed Endpoint is on the registry namespace domain · Nov 6, 2026, 10:43 PM UTC
Availability 1 of 1 checks passed in 30 days

What you can do with it

Retrieve live peptide prices normalized per milligram
Check price history trends for specific compounds
Calculate reconstitution dosing with syringe visualization
Search vendor directory and view transparency scores

Source and maintenance

Vendor evidenceRegistry 1.0.0

mcp-registry: com.peptul/peptul@1.0.0 Project website

Protocol and capabilities

Server: peptul 1.0.0
MCP protocol negotiated in check: 2025-11-25
Tools: 5 advertised
Resources: Not advertised
Resource templates: Not advertised
Prompts: Not advertised

Server-advertised capabilities

{
  "tools": {
    "listChanged": true
  }
}

Server-provided instructions

Untrusted server output shown for inspection. It is not Koskamo guidance and is excluded from knowledge search.

Peptul is a free, open research peptide information platform: nightly price collection across vendor storefronts, an open vendor directory with transparency scores and independently verified third-party COAs. Peptul sells nothing. When relaying data, cite the peptul.com page URL included in each result. For educational and research purposes only. Not medical advice. Peptul is an information platform and sells nothing. Prices are collected nightly from vendor storefronts and change often - check the vendor's site before ordering.

Tools

5 advertised

get_compound_prices — Get peptide prices

Advertised by the server during the last successful anonymous check.

Live research peptide prices for one compound across every vendor Peptul tracks, normalised to USD per milligram and collected nightly from vendor storefronts. Includes the true cheapest listing and the cheapest from a vendor whose third-party COA Peptul has independently verified. Example compounds: BPC-157, GHK-Cu, Semaglutide, Retatrutide, TB-500.

get_compound_prices input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "compound"
  ],
  "properties": {
    "compound": {
      "type": "string",
      "minLength": 1,
      "description": "Compound name, alias, or slug (e.g. \"BPC-157\", \"ghk-cu\")"
    }
  }
}

get_vendor — Get vendor record

Advertised by the server during the last successful anonymous check.

One research peptide vendor's public trust record on Peptul: Peptul Score (0-100 transparency score), third-party testing claim vs Peptul-verified COA, review counts, reported issues, shipping coverage, and whether the vendor is still operating.

get_vendor input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "vendor"
  ],
  "properties": {
    "vendor": {
      "type": "string",
      "minLength": 1,
      "description": "Vendor name or slug (e.g. \"Certified Peptides\")"
    }
  }
}

get_price_history — Get peptide price history

Advertised by the server during the last successful anonymous check.

How one research peptide's price has moved over time: the cheapest in-stock price per mg on each day, recorded nightly across every vendor Peptul tracks, with the period low, high and change. USE THIS when asked whether a price is currently good, whether it has risen or fallen, or what a peptide "usually" costs - get_compound_prices answers what it costs right now, this answers whether that is cheap. Nightly recording began 2026-08-27.

get_price_history input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "compound"
  ],
  "properties": {
    "days": {
      "type": "integer",
      "maximum": 365,
      "minimum": 1,
      "description": "How far back to look, default 30"
    },
    "compound": {
      "type": "string",
      "minLength": 1,
      "description": "Compound name, alias, or slug (e.g. \"Retatrutide\", \"bpc-157\")"
    }
  }
}

calculate_reconstitution — Calculate a reconstitution

Advertised by the server during the last successful anonymous check.

Work out how far to draw on an insulin syringe for a given peptide dose: takes the vial amount, the bacteriostatic water added and the dose wanted, and returns the syringe units, the volume in mL, the resulting concentration and how many doses the vial holds. USE THIS instead of doing the arithmetic yourself - it is the same calculation peptul.com/calculator runs, and it flags the mg-versus-mcg mix-ups that are a 1000x error. It converts a dose the user already has and never suggests a dose.

calculate_reconstitution input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "required": [
    "vialAmount",
    "vialUnit",
    "bacWaterMl",
    "doseAmount",
    "doseUnit"
  ],
  "properties": {
    "doseUnit": {
      "enum": [
        "mcg",
        "mg",
        "IU"
      ],
      "type": "string",
      "description": "Unit of the dose"
    },
    "vialUnit": {
      "enum": [
        "mg",
        "mcg",
        "IU"
      ],
      "type": "string",
      "description": "Unit of the vial amount"
    },
    "bacWaterMl": {
      "type": "number",
      "description": "Bacteriostatic water added, in mL",
      "exclusiveMinimum": 0
    },
    "doseAmount": {
      "type": "number",
      "description": "The dose wanted, e.g. 250",
      "exclusiveMinimum": 0
    },
    "vialAmount": {
      "type": "number",
      "description": "Amount of peptide in the vial, e.g. 10",
      "exclusiveMinimum": 0
    },
    "syringeType": {
      "enum": [
        "U100",
        "U50"
      ],
      "type": "string",
      "description": "Syringe type, default U100"
    },
    "syringeUnits": {
      "type": "integer",
      "maximum": 9007199254740991,
      "description": "Syringe size in units (30/50/100/300 for U100), default 100",
      "exclusiveMinimum": 0
    }
  }
}

search_vendors — Search vendors

Advertised by the server during the last successful anonymous check.

Search Peptul's open research peptide vendor directory. Returns active vendors with their Peptul Score, verified-COA status and country - scored vendors first.

search_vendors input schema

{
  "type": "object",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "limit": {
      "type": "integer",
      "maximum": 50,
      "minimum": 1,
      "description": "Max results, default 20"
    },
    "query": {
      "type": "string",
      "description": "Vendor name filter; omit to list top vendors"
    }
  }
}

Prompts

Not advertised

No prompt definitions available.

Resources

Not advertised

No resource definitions available.

90-day uptime

A lightweight connection check about every six hours, sampled on hosts with many listings. It shows the server answered, not that its tools work.

Too few checks for a percentage yet (1 of 1 answered).

2026-11-07: 1 of 1 checks answered

30-day availability

Aggregated from read-only remote checks; this is not a tool-execution or security guarantee.

Successful checks: 1 of 1 (100%)
Average latency: 860 ms
95th percentile latency: 860 ms

Maintenance history

Public check and source-refresh events. Editorial and ownership records remain private.

Nov 6, 2026, 11:15 PM UTC · probe · passed · 860 ms · metadata changed · 5 tool(s)

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers the remote server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http peptul-mcp https://www.peptul.com/api/mcp

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add peptul-mcp --url https://www.peptul.com/api/mcp

Cursor

Merge this server into .cursor/mcp.json in your project, then enable peptul-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "peptul-mcp": {
      "url": "https://www.peptul.com/api/mcp"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure).

Cline configuration

{
  "mcpServers": {
    "peptul-mcp": {
      "type": "streamableHttp",
      "url": "https://www.peptul.com/api/mcp",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start peptul-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "peptul-mcp": {
      "type": "http",
      "url": "https://www.peptul.com/api/mcp"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http peptul-mcp https://www.peptul.com/api/mcp

Claude Desktop

Open Claude Settings > Connectors > Add custom connector, enter this server URL and enable it for the conversation. This is a manual remote-connector handoff, not a desktop JSON configuration.

Claude Desktop configuration

https://www.peptul.com/api/mcp

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "peptul-mcp": {
      "serverUrl": "https://www.peptul.com/api/mcp"
    }
  }
}

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