# Peptide Library (remote · peptidelibrary.app)

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

- Trust score: 79/100 (medium)
- Change this week: +3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-10-24

## Components

- remote · `peptidelibrary.app`: 79/100 (this document), [markdown](https://verifymcp.io/servers/app-peptidelibrary-peptide-library/peptidelibrary.md), [page](https://verifymcp.io/servers/app-peptidelibrary-peptide-library/peptidelibrary)

## Channel facts

- Endpoint: `https://peptidelibrary.app/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.1`

## 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 2026-10-24.

- **Endpoint Security**: 80/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - 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**: 84/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 5864 tokens (~27/item across 217 items; 10 tools + 207 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 99/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 96% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 10 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 12 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 Peptide Library MCP server?

Peptide Library is a hosted endpoint at https://peptidelibrary.app/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 app-peptidelibrary-peptide-library 'https://peptidelibrary.app/mcp'
```

### Cursor

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

### VS Code

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

### Codex

```toml
[mcp_servers.app-peptidelibrary-peptide-library]
url = "https://peptidelibrary.app/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "app-peptidelibrary-peptide-library": {
      "type": "remote",
      "url": "https://peptidelibrary.app/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add app-peptidelibrary-peptide-library --url 'https://peptidelibrary.app/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  app-peptidelibrary-peptide-library:
    url: "https://peptidelibrary.app/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "app-peptidelibrary-peptide-library": {
      "Transport": "http",
      "Url": "https://peptidelibrary.app/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add app-peptidelibrary-peptide-library -t streamable-http -u 'https://peptidelibrary.app/mcp'
```

### Other

```json
{
  "mcpServers": {
    "app-peptidelibrary-peptide-library": {
      "type": "http",
      "url": "https://peptidelibrary.app/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.

### 2026-10-23 (score 79, +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.

### 2026-10-21 (score 78, +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.

### 2026-10-19 (score 77, +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.

### 2026-10-17 (score 76, +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.

### 2026-10-16 (score 75, 0)

- [functional improvement] Stability: unverified → 0.03

### 2026-10-15 (score 75)

First indexed and scored.

## MCP tools (10)

### `search_peptides` (~187 tokens)

Search peptides

Search the Peptide Library research database by name, synonym or alias (fuzzy), optionally filtered by research category or research area. Returns short educational profiles with evidence level and the canonical Peptide Library URL. Use get_peptide_details for the full profile. No dosing information.

Input parameters:

- `category` (string): Limit to one Peptide Library research category (see get_peptide_categories).
- `limit` (integer): Results per page (1-25).
- `offset` (integer): Results to skip, for pagination (use next_offset from the previous page).
- `query` (string): Name, synonym, alias or partial name to search for (fuzzy; e.g. "bpc", "semaglutide", "PT-141").
- `research_area` (string): Limit to peptides studied for this research area, e.g. "tissue repair", "cognition".

Output parameters:

- `disclaimer` (string)
- `filters` (object)
- `library_url` (string)
- `page` (object)
- `query`
- `results` (array)
- `retrieved_at` (string)
- `source` (object)

### `get_peptide_details` (~137 tokens)

Get peptide research profile

Full educational research profile for one peptide: classification, mechanism and targets, research areas, evidence by tier (regulatory label, controlled human trials, other human studies, secondary reports, animal and in-vitro research) with cited sources, safety and side effects, regulatory status (FDA, WADA), review dates and the canonical Peptide Library URL. Fields the profile lacks are "not_documented". Dose figures and administration instructions are never included.

Input parameters:

- `peptide` (string, required): A peptide id (e.g. "bpc-157"), name, synonym or alias (e.g. "PT-141", "Ozempic").

Output parameters:

- `also_known_as` (array)
- `categories` (array)
- `classification` (object)
- `disclaimer` (string)
- `evidence` (object)
- `id` (string)
- `mechanism` (object)
- `name` (string)
- `notes` (array)
- `properties` (object)
- `references` (array)
- `regulatory` (object)
- `research_areas` (array)
- `retrieved_at` (string)
- `review` (object)
- `safety` (object)
- `source` (object)
- `summary`
- `url` (string)

### `compare_peptides` (~135 tokens)

Compare peptides

Side-by-side research comparison of 2-3 peptides on structured profile fields: mechanism and targets, research areas, evidence level and human-trial availability, safety and side effects, FDA/WADA status, half-life and studied routes, with references. Each row says whether the values are the same, different, partial, not comparable or incomplete; missing data is never filled in and the comparison never ranks peptides. Suitable for tables. No dosing information.

Input parameters:

- `dimensions` (array): Which comparison sections to return (default: all).
- `peptides` (array, required): 2 or 3 peptide ids, names or aliases to compare.

Output parameters:

- `compare_url` (string)
- `dimensions` (array)
- `disclaimer` (string)
- `how_to_read` (string)
- `insights` (array)
- `notes` (array)
- `peptides` (array)
- `retrieved_at` (string)
- `source` (object)

### `search_research` (~150 tokens)

Search research content

Search Peptide Library's own educational content: the site FAQ, per-peptide FAQs, published articles and free courses. Returns titles, short snippets and links with source attribution (no full text, no third-party articles). Dosing, reconstitution and injection guides, and content about buying, vendors or prices, are excluded.

Input parameters:

- `limit` (integer): Results to return (1-10).
- `query` (string, required): What to look for in Peptide Library's educational content, e.g. "GLP-1 mechanism", "what is a half-life".
- `types` (array): Content types to search (default: all): site FAQ, per-peptide FAQ, articles, courses.

Output parameters:

- `disclaimer` (string)
- `notes` (array)
- `query` (string)
- `results` (array)
- `retrieved_at` (string)
- `source` (object)
- `total_matches` (integer)
- `unavailable_sources` (array)

### `get_peptide_categories` (~62 tokens)

List research categories

List the Peptide Library research categories (e.g. GLP-1/Metabolic, Cognitive, Longevity) with a description, the number of profiles and every profile in each, with links. Use a category id with search_peptides to filter.

Output parameters:

- `categories` (array)
- `disclaimer` (string)
- `note` (string)
- `retrieved_at` (string)
- `source` (object)

### `get_research_trends` (~74 tokens)

Get research trends

This week's most-researched peptides in the Peptide Library community (Trending Now, last 7 days): rank, share of researchers and growth as percentages, with what moved. Aggregate and privacy-preserving: no head counts, no individual activity, small cohorts suppressed. Popularity is not evidence of safety or effectiveness.

Output parameters:

- `as_of`
- `board` (string)
- `disclaimer` (string)
- `methodology` (array)
- `more` (string)
- `period` (string)
- `retrieved_at` (string)
- `rows` (array)
- `share_means` (string)
- `source` (object)
- `status` (string)
- `trends_url` (string)
- `window`

### `convert_units` (~149 tokens)

Convert peptide amount units

Convert an amount between mg and mcg exactly. IU ↔ mass conversion only works with a peptide whose profile documents an IU-per-mg factor (pass `peptide`); otherwise the result is an iu_factor_missing issue, never an assumed factor. Pure arithmetic: not a dosing recommendation.

Input parameters:

- `amount` (required): The amount to convert. A number; "2,5" and "2.5" both work.
- `from` (string, required): Unit of the amount (mg, mcg or IU).
- `peptide` (string): Peptide whose documented IU factor to use (only needed for IU).
- `to` (string, required): Unit to convert to (mg, mcg or IU).

Output parameters:

- `disclaimer` (string)
- `input` (object)
- `issues` (array)
- `iu_factor`
- `note` (string)
- `result`
- `retrieved_at` (string)
- `source` (object)
- `status` (string)

### `solution_concentration` (~161 tokens)

Solution concentration

Concentration of an amount dissolved in a volume of liquid (amount ÷ volume), as mg/mL, mcg/mL and, with a peptide's documented factor, IU/mL. Pure arithmetic on the given numbers: it does not suggest amounts, volumes or how to prepare anything.

Input parameters:

- `amount` (required): Amount of substance. A number; "2,5" and "2.5" both work.
- `peptide` (string): Optional: peptide whose documented IU factor to use for IU/mL.
- `unit` (string, required): Unit of the amount (mg, mcg or IU).
- `volume_ml` (required): Volume of liquid, in mL. A number; "2,5" and "2.5" both work.

Output parameters:

- `concentration`
- `disclaimer` (string)
- `issues` (array)
- `iu_factor`
- `missing` (array)
- `note` (string)
- `retrieved_at` (string)
- `source` (object)
- `status` (string)

### `blend_concentrations` (~85 tokens)

Blend concentrations

For several components dissolved together in one volume: each component's concentration and its share of the blend by amount. Arithmetic only; it says nothing about whether components can or should be combined.

Input parameters:

- `components` (array, required)
- `volume_ml` (required): Total volume of liquid, in mL. A number; "2,5" and "2.5" both work.

Output parameters:

- `components` (array)
- `disclaimer` (string)
- `issues` (array)
- `missing` (array)
- `note` (string)
- `retrieved_at` (string)
- `share_unit`
- `source` (object)
- `status` (string)
- `volume_ml`

### `cost_per_amount` (~251 tokens)

Cost per amount

Price arithmetic for a purchase: total cost (price plus optional shipping) and cost per mg, per mcg and (with a peptide's documented factor) per IU. Uses only the numbers given; it never estimates prices or shipping and converts no currencies.

Input parameters:

- `amount_per_package` (required): Amount in each vial or package. A number; "2,5" and "2.5" both work.
- `amount_unit` (string, required): Unit of the amount per package (mg, mcg or IU).
- `currency` (string): ISO currency code of the price (no conversion is done).
- `package_count`: Number of vials or packages bought for that price. A number; "2,5" and "2.5" both work.
- `peptide` (string): Optional: peptide whose documented IU factor to use for cost per IU.
- `price` (required): Price paid for the product, in major units (e.g. 49.99). A number; "2,5" and "2.5" both work.
- `shipping`: Optional one-time shipping cost, same currency. A number; "2,5" and "2.5" both work.

Output parameters:

- `cost_per_amount_unit`
- `cost_per_unit` (object)
- `currency` (string)
- `disclaimer` (string)
- `issues` (array)
- `iu_factor`
- `missing` (array)
- `note` (string)
- `retrieved_at` (string)
- `source` (object)
- `status` (string)
- `total_amount`
- `total_cost`

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/app-peptidelibrary-peptide-library/peptidelibrary#diagnostics

## Score history

- 2026-10-24: 79
- 2026-10-23: 79
- 2026-10-22: 78
- 2026-10-21: 78
- 2026-10-20: 77
- 2026-10-19: 77
- 2026-10-18: 76
- 2026-10-17: 76
- 2026-10-16: 75
- 2026-10-15: 75

## Common questions

### What is the Peptide Library MCP server?

Peptide Library is an MCP server listed in the public MCP registry as app.peptidelibrary/peptide-library. Peptide research profiles, evidence by tier, comparisons and educational content. No dosing. This page covers its hosted endpoint (https://peptidelibrary.app/mcp).

### Is the Peptide Library MCP server safe to use?

Peptide Library scores 79 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 Peptide Library MCP server expose?

Peptide Library exposes 10 tools: search_peptides, get_peptide_details, compare_peptides, search_research, get_peptide_categories, and 5 more. Their descriptions and schemas cost roughly 1,391 tokens of context every time the server is loaded.

### Does the Peptide Library MCP server require authentication?

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

### Is the Peptide Library MCP server still maintained?

Peptide Library is still listed as active in the MCP registry. We last reached this channel on 24 October 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://peptidelibrary.app/mcp
- Repository: https://github.com/ryandelauz/peptide-library-mcp
- Website: https://peptidelibrary.app/developers/mcp
- Changelog RSS feed: https://verifymcp.io/servers/app-peptidelibrary-peptide-library/peptidelibrary.xml
- Changelog JSON feed: https://verifymcp.io/servers/app-peptidelibrary-peptide-library/peptidelibrary.json
- HTML version of this page: https://verifymcp.io/servers/app-peptidelibrary-peptide-library/peptidelibrary