Peptide Library is answering right now. Last checked 8 min ago. It exposes 10 tools. Last commit 16 Oct 2026.
Peptide research profiles, evidence by tier, comparisons and educational content. No dosing.
Uptime history
27 hours of history
27 hours agonow
100.0%
Uptime 24h
92 of 92 checks
10
Tools
read from the server
951 ms
Response time
average over 24h
0
Stars
last commit 16 Oct 2026
Nothing serious here today
Today is the operative word: we check Peptide Library every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
Connect this server
Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 8 min ago.
run in your terminal
claude mcp add peptide-library --transport http https://peptidelibrary.app/mcp~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"peptide-library": {
"url": "https://peptidelibrary.app/mcp"
}
}
}~/.codex/config.toml
[mcp_servers.peptide-library]
url = "https://peptidelibrary.app/mcp".cursor/mcp.json
{
"mcpServers": {
"peptide-library": {
"url": "https://peptidelibrary.app/mcp"
}
}
}.vscode/mcp.json
{
"mcpServers": {
"peptide-library": {
"url": "https://peptidelibrary.app/mcp"
}
}
}Available tools 10
Read directly from the server with tools/list, grouped by what they act on.
If a tool disappears, we record the date.
peptide
get_peptide_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.
get_peptide_details
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.
research
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.
search_research
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.
blend
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.
compare
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.
convert
convert_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.
cost
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.
peptides
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.
solution
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.
Endpoints
| URL | Transport | State | Latency | Checked |
|---|---|---|---|---|
| https://peptidelibrary.app/mcp | streamable-http | answering | 658 ms | 8 min ago |
Alternatives to Peptide Library
same job, measured the same wayGit.Top
by haocn-ops
Evidence-backed open-source project search, recommendations, alternatives, and comparisons.
Supstack
by drbaher
Evidence-based supplement research, dosing, safety, and interactions as agent-callable tools.
Riptide — public risk and event research
by beepboop2025
Read-only paper risk evidence and policy-gated committed event research. No real orders.
Glp1search
by sndevore77
GLP-1 provider directory, peptide database, and medication comparison tools.
Promptarch
by promptarch
Research-backed lint + generation for agent context files (CLAUDE.md, AGENTS.md) + prompt enhancer.
Macaroon Bible Evidence
by macaroonnetwork
Read-only BSB and WEB Scripture evidence with provenance, context, comparison, and search.
LastSearch
by lastsearch-hq
Evidence-backed web research for AI agents with citations and confidence scores.
E
Evidence
by titratelab
Find lab-report identities and clinical research with dated sources and evidence limitations.
Peptide Library — questions
Answers built from our own checks of this server.
What can Peptide Library do?
It exposes 10 tools, read directly from the server on our last check. Among them: blend_concentrations, compare_peptides, convert_units, cost_per_amount, get_peptide_categories, get_peptide_details and 4 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README.
How MCP servers expose tools in the first place →
What is Peptide Library mostly used for?
Its tools cluster around peptide and research. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.
Is Peptide Library working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 951 ms. The bar chart above shows every period we have measured.
How do I connect Peptide Library?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Peptide Library need an API key?
No. Peptide Library completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 10 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Peptide Library?
It answers our handshake in 951 ms on average, which is faster than 8% of all working MCP servers we measure. That is on the slow side — worth knowing if the tool sits inside an interactive loop. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Peptide Library open source?
Yes — it is published under the MIT licence and 0 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.