Peptide Library

by peptidelibrary.app · remote · no sign-in to list tools · v1.0.1 · published by app.peptidelibrary

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

Final · 1Changes · 3

Compare Registry entry

10 tools: 1 do something that can't be undone, 3 change things and 6 only read.

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things3Claude Code: ask: see these tools
Only reads6Claude Code: allow: see these tools

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

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

Findings

Matches of fixed checks, with the text they matched.

1 warn

Warnconvert_units
The server marks "convert_units" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
Matched text
annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "convert_units" says "convert": a word for a change.
What this check looks for

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

10 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude Code: ask

convert_unitsConvert an amount between mg and mcg exactly.1 finding
Why it is in this group
- The name "convert_units" says "convert": a word for a change.
- The input addresses people (input.to): what it sends cannot be taken back.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Findings
- Warn
  The server marks "convert_units" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".
  Matched text
  annotations: {"readOnlyHint":true,"destructiveHint":false,"idempotentHint":true,"openWorldHint":false}; The name "convert_units" says "convert": a word for a change.
  What this check looks for
Description, as the server wrote it
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.
Annotations the server declares
- title: Convert peptide amount units
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Changes things 3Creates or changes something that can be changed back.Claude Code: ask

blend_concentrationsFor several components dissolved together in one volume: each component's concentration and its share of the blend by amount.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Blend concentrations
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
cost_per_amountPrice 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.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Cost per amount
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
solution_concentrationConcentration 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.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
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.
Annotations the server declares
- title: Solution concentration
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

Only reads 6Looks things up and changes nothing.Claude Code: allow

compare_peptidesSide-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 e…No findings
Why it is in this group
- The name "compare_peptides" says "compare": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Compare peptides
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_peptide_categoriesList the Peptide Library research categories (e.g.No findings
Why it is in this group
- The name "get_peptide_categories" says "get": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: List research categories
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_peptide_detailsFull educational research profile for one peptide: classification, mechanism and targets, research areas, evidence by tier (regulatory label, controlled human trials, other human s…No findings
Why it is in this group
- The name "get_peptide_details" says "get": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Get peptide research profile
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
get_research_trendsThis 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.No findings
Why it is in this group
- The name "get_research_trends" says "get": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Get research trends
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
search_peptidesSearch the Peptide Library research database by name, synonym or alias (fuzzy), optionally filtered by research category or research area.No findings
Why it is in this group
- The name "search_peptides" says "search": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Search peptides
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false
search_researchSearch Peptide Library's own educational content: the site FAQ, per-peptide FAQs, published articles and free courses.No findings
Why it is in this group
- The name "search_research" says "search": a word for reading.
Description, as the server wrote it
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.
Annotations the server declares
- title: Search research content
- readOnlyHint: true
- destructiveHint: false
- idempotentHint: true
- openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 1.0.1. Values in angle brackets are yours to fill in.

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__peptide-library__search_peptides",
      "mcp__peptide-library__get_peptide_details",
      "mcp__peptide-library__compare_peptides",
      "mcp__peptide-library__search_research",
      "mcp__peptide-library__get_peptide_categories",
      "mcp__peptide-library__get_research_trends"
    ],
    "ask": [
      "mcp__peptide-library__convert_units",
      "mcp__peptide-library__solution_concentration",
      "mcp__peptide-library__blend_concentrations",
      "mcp__peptide-library__cost_per_amount"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as peptide-library. Review it before you use it.

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/app.peptidelibrary/peptide-library/changes.xml

An Atom feed. Works in any feed reader or Slack's RSS app.

Anlyon alternative

4 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Source: MCP Registry · repository. Synced Oct 21, 2026, 17:44 UTC.

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