# Peptul (remote · www.peptul.com)

Live research peptide prices, price history, vendor trust records and a reconstitution calculator.

- Trust score: 72/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-27

## Components

- remote · `www.peptul.com`: 72/100 (this document), [markdown](https://verifymcp.io/servers/com-peptul-peptul/api-mcp.md), [page](https://verifymcp.io/servers/com-peptul-peptul/api-mcp)

## Channel facts

- Endpoint: `https://www.peptul.com/api/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-27.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 5 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 773 tokens (~154/item across 5 items; 5 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 40/100
  - Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the Peptul MCP server?

Peptul is a hosted endpoint at https://www.peptul.com/api/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

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

### Cursor

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

### VS Code

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

### Codex

```toml
[mcp_servers.com-peptul-peptul]
url = "https://www.peptul.com/api/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "com-peptul-peptul": {
      "type": "remote",
      "url": "https://www.peptul.com/api/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add com-peptul-peptul --url 'https://www.peptul.com/api/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  com-peptul-peptul:
    url: "https://www.peptul.com/api/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "com-peptul-peptul": {
      "Transport": "http",
      "Url": "https://www.peptul.com/api/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add com-peptul-peptul -t streamable-http -u 'https://www.peptul.com/api/mcp'
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-25 (score 72, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-23 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-21 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-19 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 10 to 13. That category is still filling its 30-day observation window: 3 days of observed history at the previous scan, 4 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-17 (score 68, +1)

No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 67, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-09-15 (score 67)

First indexed and scored.

## MCP tools (5)

### `get_compound_prices` (~118 tokens)

Get peptide prices

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.

Input parameters:

- `compound` (string, required): Compound name, alias, or slug (e.g. "BPC-157", "ghk-cu")

### `get_vendor` (~81 tokens)

Get vendor record

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.

Input parameters:

- `vendor` (string, required): Vendor name or slug (e.g. "Certified Peptides")

### `get_price_history` (~152 tokens)

Get peptide price history

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.

Input parameters:

- `compound` (string, required): Compound name, alias, or slug (e.g. "Retatrutide", "bpc-157")
- `days` (integer): How far back to look, default 30

### `calculate_reconstitution` (~246 tokens)

Calculate a reconstitution

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.

Input parameters:

- `bacWaterMl` (number, required): Bacteriostatic water added, in mL
- `doseAmount` (number, required): The dose wanted, e.g. 250
- `doseUnit` (string, required): Unit of the dose
- `syringeType` (string): Syringe type, default U100
- `syringeUnits` (integer): Syringe size in units (30/50/100/300 for U100), default 100
- `vialAmount` (number, required): Amount of peptide in the vial, e.g. 10
- `vialUnit` (string, required): Unit of the vial amount

### `search_vendors` (~71 tokens)

Search vendors

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

Input parameters:

- `limit` (integer): Max results, default 20
- `query` (string): Vendor name filter; omit to list top vendors

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/com-peptul-peptul/api-mcp#diagnostics

## Score history

- 2026-09-27: 72
- 2026-09-26: 72
- 2026-09-25: 72
- 2026-09-24: 71
- 2026-09-23: 71
- 2026-09-22: 70
- 2026-09-21: 70
- 2026-09-20: 69
- 2026-09-19: 69
- 2026-09-18: 68
- 2026-09-17: 68
- 2026-09-16: 67
- 2026-09-15: 67

## Common questions

### What is the Peptul MCP server?

Peptul is an MCP server listed in the public MCP registry as com.peptul/peptul. Live research peptide prices, price history, vendor trust records and a reconstitution calculator. This page covers its hosted endpoint (https://www.peptul.com/api/mcp).

### Is the Peptul MCP server safe to use?

Peptul scores 72 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the Peptul MCP server expose?

Peptul exposes 5 tools: get_compound_prices, get_vendor, get_price_history, calculate_reconstitution, search_vendors. Their descriptions and schemas cost roughly 668 tokens of context every time the server is loaded.

### Does the Peptul MCP server require authentication?

No. We connected to Peptul without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Peptul MCP server still maintained?

Peptul is still listed as active in the MCP registry. We last reached this channel on 27 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://www.peptul.com/api/mcp
- Website: https://www.peptul.com/
- Changelog RSS feed: https://verifymcp.io/servers/com-peptul-peptul/api-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/com-peptul-peptul/api-mcp.json
- HTML version of this page: https://verifymcp.io/servers/com-peptul-peptul/api-mcp