Peptul
REMOTE · WWW.PEPTUL.COM · SCANNED SEP 27
Live research peptide prices, price history, vendor trust records and a reconstitution calculator.
Available components
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. How we score → Why this is hard to score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- 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. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability76
- AI-judged instruction clarity (excellent).Pass
- 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. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management40
- Stability observed for 12 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 6 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a current MCP spec version (2026-07-28).Pass
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.
remote · www.peptul.com
claude mcp add --transport http com-peptul-peptul 'https://www.peptul.com/api/mcp'
{
"mcpServers": {
"com-peptul-peptul": {
"url": "https://www.peptul.com/api/mcp"
}
}
} {
"servers": {
"com-peptul-peptul": {
"type": "http",
"url": "https://www.peptul.com/api/mcp"
}
}
} [mcp_servers.com-peptul-peptul] url = "https://www.peptul.com/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"com-peptul-peptul": {
"type": "remote",
"url": "https://www.peptul.com/api/mcp",
"enabled": true
}
}
} openclaw mcp add com-peptul-peptul --url 'https://www.peptul.com/api/mcp' --transport streamable-http
mcp_servers:
com-peptul-peptul:
url: "https://www.peptul.com/api/mcp" {
"McpServers": {
"com-peptul-peptul": {
"Transport": "http",
"Url": "https://www.peptul.com/api/mcp"
}
}
} assistant mcp add com-peptul-peptul -t streamable-http -u 'https://www.peptul.com/api/mcp'
{
"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.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 25 Sept 26 +1
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 23 Sept 26 +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.
- 21 Sept 26 +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.
- 19 Sept 26 +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.
- 17 Sept 26 +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.
- 16 Sept 26 0
- Stability: unverified → 0.03 ▲ functional
- 15 Sept 26 67
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 27 Sept 2026 · Probed https://www.peptul.com/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=www.peptul.com | CN=YR2,O=Let's Encrypt,C=US | 26 Sept 2026 | 25 Dec 2026 | RSA 2048 | SHA256-RSA | 62ca8803598d6f446ef380c78b9c35e8927 |
| SANs: www.peptul.com | ||||||
| CN=YR2,O=Let's Encrypt,C=US (CA) | CN=Root YR,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | RSA 2048 | SHA256-RSA | 4ebd24947e24d394802d84a52fd5b319 |
| CN=Root YR,O=ISRG,C=US (CA) | CN=ISRG Root X1,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | RSA 4096 | SHA256-RSA | f24b6d17f9d9ad7cb1c9fea78782699f |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of www.peptul.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| peptul.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=63072000 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://www.peptul.com/api/mcp | Verified | 200 | |
| http (plaintext) | http://www.peptul.com/api/mcp | HTTPS enforced | 308 | https://www.peptul.com/api/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
calculate_reconstitution Calculate a reconstitution ~246
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.
| Name | Type | Req | Description |
|---|---|---|---|
| bacWaterMl | number | yes | Bacteriostatic water added, in mL |
| doseAmount | number | yes | The dose wanted, e.g. 250 |
| doseUnit | string | yes | 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 | yes | Amount of peptide in the vial, e.g. 10 |
| vialUnit | string | yes | Unit of the vial amount |
No output schema declared.
No examples provided.
get_compound_prices Get peptide prices ~118
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.
| Name | Type | Req | Description |
|---|---|---|---|
| compound | string | yes | Compound name, alias, or slug (e.g. "BPC-157", "ghk-cu") |
No output schema declared.
No examples provided.
get_price_history Get peptide price history ~152
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.
| Name | Type | Req | Description |
|---|---|---|---|
| compound | string | yes | Compound name, alias, or slug (e.g. "Retatrutide", "bpc-157") |
| days | integer | – | How far back to look, default 30 |
No output schema declared.
No examples provided.
get_vendor Get vendor record ~81
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.
| Name | Type | Req | Description |
|---|---|---|---|
| vendor | string | yes | Vendor name or slug (e.g. "Certified Peptides") |
No output schema declared.
No examples provided.
search_vendors Search vendors ~71
Search Peptul's open research peptide vendor directory. Returns active vendors with their Peptul Score, verified-COA status and country - scored vendors first.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | Max results, default 20 |
| query | string | – | Vendor name filter; omit to list top vendors |
No output schema declared.
No examples provided.
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.