Peptide Library

Measured conclusion: Alive, not deep-tested. L2 outcome: not_attempted.

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

Add to your agent

Copy this into your MCP client config:

{
  "mcpServers": {
    "Peptide Library": {
      "url": "https://peptidelibrary.app/mcp",
      "transport": "streamable-http"
    }
  }
}

Measured tools (10)

• search_peptides read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• get_peptide_details read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• compare_peptides read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• search_research read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• get_peptide_categories read-only

  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.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• get_research_trends read-only

  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.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• convert_units read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• solution_concentration read-only

  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.

  Parameters:

  • amount (required) — Amount of substance. A number; "2,5" and "2.5" both work.
  • unit (required) — string — 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.
  • peptide — string — Optional: peptide whose documented IU factor to use for IU/mL.

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• blend_concentrations read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

• cost_per_amount read-only

  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.

  Parameters:

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

  Hints: read-only yes · destructive no · idempotent yes · open-world no

Publisher website Repository

Measured by MCPYP probing. Untested fields are omitted, never estimated. Listing is always free; MCPYP never proxies calls or stores user tokens.