Deer Supply
REMOTE · DEER.SUPPLY
Deer Supply (Canada): GLP weight-loss pens, live prices and delivery; sign in for orders and health.
Available components
Last scanned (19 hours ago)
Scores higher than 79% of remote servers
Reachable. Last reached 4 Nov 2026.
Category Health and Science
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 Security80
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- 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 Usability69
- AI-judged instruction clarity (good).Pass
- Tool/resource definitions use about 1664 tokens (~87/item across 19 items; 19 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management58
- Stability check failed: schema churn in the 19 days we've observed: 1 tool removals, 0 breaking changes, 0 auth/transport breaks, 0 additions. See how to fix → Fail
Tool Coverage78
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 34% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 19 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 20 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 54 to 58.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 48 to 51.
- 31 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 41 to 44.
- 29 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 34 to 38.
- 26 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 24 to 28.
- 24 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 18 to 21.
- 22 Oct 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 11 to 14.
- 20 Oct 26 0
- Stability: 0.10 → fail ▼ security
- A breaking change shipped without a version bump: still 2.1.0 ▼ security
- Tool “get_trust_report” was removed ▼ security
- The server rewrote its instructions, which are the text every model session reads security
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 4 Nov 2026 · Probed https://deer.supply/api/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=deer.supply | CN=YR2,O=Let's Encrypt,C=US | 24 Oct 2026 | 22 Jan 2027 | RSA 2048 | SHA256-RSA | 589bfcb8c397a2abf895f3e3ad023a28282 |
| SANs: deer.supply | ||||||
| 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 deer.supply. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| supply. | present | 43957 | 8 | Verified |
| deer.supply. | 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 |
| content-security-policy | frame-ancestors 'self' |
| x-content-type-options | nosniff |
| permissions-policy | camera=(), microphone=(), geolocation=(), browsing-topics=() |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://deer.supply/api/mcp | Verified | 200 | |
| http (plaintext) | http://deer.supply/api/mcp | HTTPS enforced | 308 | https://deer.supply/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 →
compare_weight_loss_medications Compare weight-loss medications ~79
Side-by-side comparison of the three GLP weight-loss medications Deer Supply sells (Semaglutide, Tirzepatide, Retatrutide): mechanism, generation, the landmark trial's average weight loss, maintenance dose, today's starting price and lowest price per mg in CAD. Use this when someone is choosing a weight-loss option.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
create_cart_link Create a cart link ~56
A deer.supply link that opens the cart with these items already in it, for the person to review and check out themselves (they enter their own delivery details and payment). Agents cannot place orders.
| Name | Type | Req | Description |
|---|---|---|---|
| items | array | yes | – |
No output schema declared.
No examples provided.
delivery_estimate Delivery estimate ~74
When an order placed now would ship and arrive, for a Canadian postal code, using the dates Deer quotes on its product pages (orders by noon Eastern ship that weekday; pens travel on the fastest service).
| Name | Type | Req | Description |
|---|---|---|---|
| includes_pens | boolean | – | False for an order of capsules only. |
| postal_code | string | yes | – |
No output schema declared.
No examples provided.
estimate_weight_loss Estimate weight loss (trial averages) ~77
What the clinical trials averaged for someone at a given starting weight, per medication, at 6, 12 and 18 months, using the same curves as deer.supply/calculator. These are trial averages, not a prediction for any one person.
| Name | Type | Req | Description |
|---|---|---|---|
| unit | string | – | – |
| weight | number | yes | Current body weight. |
No output schema declared.
No examples provided.
get_help Help and policies ~54
Answers from Deer Supply's FAQ (shipping, storage, payment, using the pens, eligibility, returns) plus links to its policies. Pass the question; leave it empty for the whole FAQ.
| Name | Type | Req | Description |
|---|---|---|---|
| question | string | – | – |
No output schema declared.
No examples provided.
get_lab_results Lab reports ~36
Third-party lab (COA) reports Deer Supply publishes per product size. Optional product_id.
| Name | Type | Req | Description |
|---|---|---|---|
| product_id | string | – | – |
No output schema declared.
No examples provided.
get_my_account My Deer account ~76
Requires signing in with a Deer account. A plain-language summary of the signed-in customer's Deer account: their name, orders with status and tracking, store credit and rewards, and (when health access was granted) each health profile's weigh-ins, plan and side effects. The same picture the store's own assistant has. Start here.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_my_health My health charts ~82
Requires signing in with a Deer account. Each health profile on the account (one sign-in can chart several people): its id (needed to log anything), recent weigh-ins in pounds and the trend, the treatment plan (medication, week, current dose, next injection, upcoming dose steps), side effects with their ids, reminder settings and the weigh-in reward.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_product Product details ~72
Everything Deer Supply publishes about one product: what it is, sizes and prices, the published dosing schedule, what is in the box, lab (COA) reports, and the related FAQ answers. product_id comes from search_products (e.g. 'retatrutide').
| Name | Type | Req | Description |
|---|---|---|---|
| product_id | string | yes | – |
No output schema declared.
No examples provided.
get_store_info About Deer Supply ~50
Who Deer Supply is and how buying works: what it sells, where it ships, payment methods accepted right now, shipping costs, the money-back policy, lab testing, and how to reach a person.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
import_weights Import weight history ~81
Requires signing in with a Deer account. Add many past weigh-ins at once (from a scale app, a spreadsheet, a photo the person shared). Days already logged are skipped. Show the person the list and get their OK first.
| Name | Type | Req | Description |
|---|---|---|---|
| entries | array | yes | – |
| profile_id | string | yes | From get_my_health. |
| unit | string | – | – |
No output schema declared.
No examples provided.
list_my_orders My orders ~49
Requires signing in with a Deer account. The signed-in customer's orders, newest first: number, date, status, total, items, tracking number and expected arrival.
| Name | Type | Req | Description |
|---|---|---|---|
| limit | integer | – | – |
No output schema declared.
No examples provided.
log_weight Log a weigh-in ~75
Requires signing in with a Deer account. Record a weigh-in on one of the customer's health profiles. Confirm the number with the person first.
| Name | Type | Req | Description |
|---|---|---|---|
| date | string | – | YYYY-MM-DD, default today. |
| profile_id | string | yes | From get_my_health. |
| unit | string | – | – |
| weight | number | yes | – |
No output schema declared.
No examples provided.
quote_cart Price a cart ~97
Price a cart exactly as Deer Supply's checkout would: line prices with any sale or quantity break, an optional coupon code, shipping and the total in CAD, plus a delivery estimate when a Canadian postal code is given. variant_id values come from search_products. Nothing is reserved or ordered.
| Name | Type | Req | Description |
|---|---|---|---|
| coupon_code | string | – | – |
| items | array | yes | – |
| postal_code | string | – | Canadian postal code, for the delivery estimate. |
No output schema declared.
No examples provided.
report_side_effect Report a side effect ~105
Requires signing in with a Deer account. Send a side effect to the customer's care team on one profile. If it sounds severe, tell the person to get medical help right away (call 911 or go to an emergency department) as well; this report is not an emergency channel.
| Name | Type | Req | Description |
|---|---|---|---|
| description | string | yes | – |
| profile_id | string | yes | From get_my_health. |
| severity | string | yes | – |
| started_on | string | – | YYYY-MM-DD, optional. |
No output schema declared.
No examples provided.
resolve_side_effect Mark a side effect resolved ~67
Requires signing in with a Deer account. Mark one of the profile's open side effects as resolved (side_effect_id from get_my_health). Reopening one is the care team's job.
| Name | Type | Req | Description |
|---|---|---|---|
| profile_id | string | yes | From get_my_health. |
| side_effect_id | string | yes | – |
No output schema declared.
No examples provided.
search_products Search products ~119
Search Deer Supply's catalog (Canada). Weight loss: Retatrutide, Tirzepatide and Semaglutide as pre-filled, ready-to-use pens; also recovery products and ancillary capsules. Returns each product with its sizes, today's price in CAD (sales included), price per mg, quantity breaks, stock and links. Call with no arguments to list everything.
| Name | Type | Req | Description |
|---|---|---|---|
| category | string | – | – |
| query | string | – | Words to match, e.g. 'tirzepatide', 'mounjaro', 'recovery'. |
No output schema declared.
No examples provided.
set_health_emails Health email settings ~65
Requires signing in with a Deer account. Turn a profile's weigh-in reminder emails and/or reorder alert emails on or off.
| Name | Type | Req | Description |
|---|---|---|---|
| profile_id | string | yes | From get_my_health. |
| reorder_alert | boolean | – | – |
| weighin_reminders | boolean | – | – |
No output schema declared.
No examples provided.
track_order Track an order ~70
Status of a Deer Supply order, given its order number AND the email it was placed with (the same check as deer.supply/track). Returns the status, dates, items and tracking number. Never returns addresses or payment details.
| Name | Type | Req | Description |
|---|---|---|---|
| string | yes | – | |
| order_number | string | yes | – |
No output schema declared.
No examples provided.
How do I install the Deer Supply MCP server?
Deer Supply is a hosted endpoint at https://deer.supply/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 · deer.supply
claude mcp add --transport http supply-deer-deer-supply 'https://deer.supply/api/mcp'
What is the Deer Supply MCP server?
Deer Supply is an MCP server listed in the public MCP registry as supply.deer/deer-supply. Deer Supply (Canada): GLP weight-loss pens, live prices and delivery; sign in for orders and health. This page covers its hosted endpoint (https://deer.supply/api/mcp).
Is the Deer Supply MCP server safe to use?
Deer Supply 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 Deer Supply MCP server expose?
Deer Supply exposes 19 tools: search_products, get_product, compare_weight_loss_medications, estimate_weight_loss, quote_cart, and 14 more. Their descriptions and schemas cost roughly 1,384 tokens of context every time the server is loaded.
Does the Deer Supply MCP server require authentication?
No. We connected to Deer Supply without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Deer Supply MCP server still maintained?
Deer Supply is still listed as active in the MCP registry. We last reached this channel on 4 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.