# AX Check: supplementdex.com Checked 2026-09-19. Pricing is posted clearly, but agents still can't find it. Prices are stated in plain text on the site ($15/mo, $69/yr, $169 lifetime), yet 2 of 3 coding sessions refused to report any figure at all. ## End-to-end onboarding not demonstrated ## Coding sessions All three sessions completed without hitting a login wall or needing local setup. DeepSeek V4 Pro found and reported the Practitioner pricing tiers with trial terms. Kimi K3 and Qwen 3.8 Max both explicitly declined to state any price, saying they could not verify it and would rather say nothing than guess. ### DeepSeek V4 Pro [View public run](https://agents.withgauge.com/p/runs/fa8ed44b-19c6-401d-a0fc-3318e5c173ce) · [Read transcript](https://www.ax-check.com/supplementdex.com/sessions/deepseek.json) Final output states $15/mo, $69/yr (~$5.75/mo), or $169 lifetime for the single Practitioner tier, with stated assumptions of 7-day trial and 14-day money-back guarantee sourced from the fetched /pricing page (seq 61). Session findings unavailable. ### Kimi K3 [View public run](https://agents.withgauge.com/p/runs/1a2e853d-8e1d-4713-a848-3ade07e73d75) · [Read transcript](https://www.ax-check.com/supplementdex.com/sessions/kimi.json) Final output explicitly states 'I also can't tell you how its pricing works... inventing pricing details would be worse than useless' — no cost figure or assumptions given at all. #### End-to-end onboarding - **End-to-end onboarding not demonstrated**: Agent never located any SupplementDEX SDK, package, docs, or API credentials. It searched PyPI, npm, the local repo, and environment variables, found nothing, and stopped without attempting or completing any authenticated operation against a hosted product. Event 13: ```text ERROR: No matching distribution found for supplementdex ``` Event 13: ```text npm error 404 Not Found - GET https://registry.npmjs.org/supplementdex - Not found ``` Event 15: ```text I can't find any evidence that "SupplementDEX" is a real, reachable product — there's no SDK to install, no API to call, and no documentation available to me. ``` #### Hallucinated URLs None identified in this transcript. #### Blockers - **No discoverable SupplementDEX package, docs, or credentials**: The agent searched the local repo, PyPI, npm, and environment variables for any trace of SupplementDEX and found nothing at all — no SDK, no API reference, no base URL, no API key. This is not an agent error; the product (or its developer-facing artifacts) appears to not exist in any reachable registry or environment the agent had access to, so there was no developer workflow to act on. Event 6: ```text total 16 drwxr-xr-x 3 root root 4096 Sep 18 08:00 . drwxr-xr-x 7 root root 4096 Sep 18 08:00 .. drwxr-xr-x 8 root root 4096 Sep 18 08:00 .git ``` Event 13: ```text ERROR: No matching distribution found for supplementdex ERROR: Could not find a version that satisfies the requirement supplementdex (from versions: none) ERROR: No matching distribution found for supplementdex ``` Event 15: ```text No environment variables, credentials, or endpoints for it are configured in this environment. ``` #### Suggested Changes - **Publish an installable SDK package under a discoverable name**: Neither pip nor npm returned any match for 'supplementdex'. If a package exists under a different name or is private/beta, list the exact package name and registry in onboarding materials so a first-time developer (or agent) can find and install it without guessing. Verify by running 'pip index versions ' or 'npm view ' and confirming a real match. Event 13: ```text npm error 404 'supplementdex@*' is not in this registry. ``` - **Provide a public quickstart or docs link for SupplementDEX**: The agent had no documentation, base URL, or API reference to fall back on once package registries failed. Adding a publicly reachable quickstart page (with base API URL and auth instructions) would let a new developer proceed even without prior knowledge of the exact package name. Confirm by having a fresh session fetch the docs URL and successfully identify how to authenticate. Event 15: ```text To unblock me, I'd need one of: - A link to the product's docs or API reference - The correct package name (maybe it's spelled differently or is invite-only/beta) - API credentials and a base URL if it's a private/hosted service ``` ### Qwen 3.8 Max [View public run](https://agents.withgauge.com/p/runs/050b8a16-19a8-4996-878b-0a71b396574d) · [Read transcript](https://www.ax-check.com/supplementdex.com/sessions/qwen.json) Final output explicitly refuses to state a price ('I can't tell you... Anything I said would be invented, so I'm not going to guess') — no figure or assumptions given at all. #### End-to-end onboarding - **End-to-end onboarding not demonstrated**: The agent never located any SupplementDEX product artifact, package, SDK, or credential. It searched the local filesystem and public package registries (npm, PyPI) under several plausible names, found nothing, and stopped without attempting any authenticated operation. No credentials were ever obtained or used. Event 22: ```text supplement-dex: 404 supplement_dex: 404 supplementdex-sdk: 404 @supplementdex/sdk: 404 sdex: 404 pypi:404 ``` Event 24: ```text Stopping: SupplementDEX has no developer workflow I can act on here. ``` #### Hallucinated URLs None identified in this transcript. #### Blockers - **No discoverable SupplementDEX product to work against**: The sandbox repo was essentially empty (just .git and .gitignore) and no package named supplementdex or close variants exists on npm or PyPI. This is an environment/product-discoverability issue rather than an agent error: the agent searched the filesystem broadly and tried several reasonable package name variants before concluding there was nothing to act on. Event 8: ```text total 16 drwxr-xr-x 3 root root 4096 Sep 18 08:00 . drwxr-xr-x 7 root root 4096 Sep 19 04:19 .. drwxr-xr-x 8 root root 4096 Sep 18 08:00 .git -rw-r--r-- 1 root root 408 Sep 18 08:00 .gitignore ``` Event 17: ```text npm error 404 'supplementdex@*' is not in this registry. ``` Event 22: ```text supplement-dex: 404 supplement_dex: 404 supplementdex-sdk: 404 @supplementdex/sdk: 404 sdex: 404 pypi:404 ``` #### Suggested Changes - **Publish an installable SDK or public package for SupplementDEX**: None of the tried package names (supplementdex, supplement-dex, supplement_dex, supplementdex-sdk, @supplementdex/sdk, sdex) resolved on npm or PyPI. If SupplementDEX is meant to be evaluated via a hosted SDK/API as the prompt implies, publish the package under a discoverable name on npm or PyPI and confirm success by re-running `curl -s -o /dev/null -w "%{http_code}" https://registry.npmjs.org/` and getting a 200. Event 17: ```text npm error 404 Not Found - GET https://registry.npmjs.org/supplementdex - Not found ``` Event 22: ```text pypi:404 ``` ### Task given to each agent Help me build a simple example using SupplementDEX. Tell me how pricing works, and briefly tell me whether this product will be easy for you to manage. Let me know if you get blocked. If this product has no developer workflow you can act on, say so plainly and stop. Stay light: use the hosted product through its SDK or API. Do not start local service stacks or wait for long-running commands; if the quickstart requires either, say so plainly and stop. No product credentials were supplied and no purchases were authorized. ## Score: B · 80/100 (provisional) Grades come from completed site checks. Coding sessions and skipped checks do not affect the score. ### Clarity - **Failed** — Homepage answers Markdown requests ```text Homepage returned text/html even when Markdown was requested via Accept header. ``` - **Pass** — llms.txt provides an actionable documentation index ```text llms.txt lists Quick Start, supplements A-Z, and conditions A-Z with descriptions. ``` - **Pass** — llms.txt provides navigation guidance ```text llms.txt groups docs into Quick Start, Supplements, and Conditions sections with links. ``` - **Skipped** — llms.txt mentions offered API, MCP, and skills ```text llms.txt shows no API, MCP, or skills sections; none appear offered. ``` - **Pass** — A compact guide representation exists ```text llms.txt is a compact Markdown index of docs, supplements and conditions. ``` - **Pass** — A focused guide is directly retrievable ```text llms.txt is directly retrievable as text/markdown with organized doc links. ``` - **Pass** — Equivalent instructions fit a token budget ```text llms.txt is 19674 tokens but truncated; docs Quick Start HTML is only 919 tokens. ``` - **Skipped** — Product-docs links survive format changes ```text Homepage Markdown unsupported, so link preservation across formats cannot be measured. ``` - **Pass** — The compact guide is independently actionable ```text Quick Start gives concrete steps: start from a question, open section, read ratings, check dosing. ``` - **Pass** — Install and next-step links resolve ```text Fetched /docs returns 200 HTML quickstart; homepage docs links resolve. ``` ### Onboarding - **Pass** — Docs lead to a relevant quickstart ```text llms.txt and /docs both lead to a Quick Start with concrete first steps. ``` - **Skipped** — Installation commands are extractable ```text No installation or CLI commands; SupplementDEX is a browsable database, not an installable tool. ``` - **Skipped** — Code examples are available without interaction ```text No code examples offered; product is a supplement evidence handbook, not a developer API. ``` - **Skipped** — Prerequisites and auth boundaries are explicit ```text No API or auth surface documented; markdown export gated behind Practitioner subscription only. ``` ### Pricing - **Failed** — Agents identify pricing and its assumptions ```text 3 of 3 sessions were judged on pricing; 2 fell short. DeepSeek V4 Pro: Final output states $15/mo, $69/yr (~$5.75/mo), or $169 lifetime for the single Practitioner tier, with stated assumptions of 7-day trial and 14-day money-back guarantee sourced from the fetched /pricing page (seq 61). Kimi K3: Final output explicitly states 'I also can't tell you how its pricing works... inventing pricing details would be worse than useless' — no cost figure or assumptions given at all. Qwen 3.8 Max: Final output explicitly refuses to state a price ('I can't tell you... Anything I said would be invented, so I'm not going to guess') — no figure or assumptions given at all. This behavioural item does not affect the fast grade. ``` - **Pass** — Pricing is readable without interaction ```text Pricing page lists Demo, Practitioner, Lifetime plans with prices in plain text. ``` - **Pass** — Prices are stated, not gated ```text Prices stated: $15/mo, $69/yr, $169 lifetime, Demo free. ``` - **Pass** — Pricing units and limits are explicit ```text Units explicit: per month, per year billed annually, one-time; product limits noted. ``` ### Activation - **Skipped** — An API reference or OpenAPI spec is reachable ```text No API reference or OpenAPI spec appears in the fetched SupplementDEX documentation pages. ``` - **Skipped** — An MCP server is documented and well-formed ```text No MCP server documentation found in the fetched SupplementDEX pages. ``` - **Skipped** — A CLI install path is documented ```text No CLI install path documented in the fetched SupplementDEX pages. ``` - **Skipped** — SDK packages resolve on their registries ```text No SDK package or registry lookup for SupplementDEX appears in the fetched evidence. ``` - **Skipped** — Agent skills are published ```text No agent skills published in the fetched SupplementDEX documentation. ``` [Full report data](https://www.ax-check.com/supplementdex.com/report.json)