KnownGate Verify MCP Server

com.knowngate/verify provides food verification for people and AI agents. It checks food against disallowed items (e.g., must-not-be-in) or numeric thresholds (e.g., must stay under) and returns evidence-backed verdicts including sources and read dates. The server supports Streamable HTTP and SSE.

🛠️ Key Features

Food verification layer for people and AI agents
Evidence-backed verdicts with sources
Read dates included in results
Checks for “must not be in” and numeric limits

🚀 Use Cases

Verifying dietary-restriction constraints
Allergen-related verification
Nutrition and limit checking for foods
Integration with model context workflows via MCP

⚡ Developer Benefits

MCP server endpoint at https://mcp.knowngate.com
Alternative documented endpoint: https://www.knowngate.com/api/knowngate/v0/mcp
Streamable HTTP and SSE for transport

⚠️ Limitations

Tooling count: 4, but specific tools/endpoints are not detailed in the provided data

KnownGate

KnownGate is the food verification layer for people and AI agents: it checks food against what must not be in it, or a number it must stay under, and returns evidence-backed verdicts with their sources and read dates.

MCP endpoint

code

https://mcp.knowngate.com

Streamable HTTP and SSE. The versioned path https://www.knowngate.com/api/knowngate/v0/mcp serves the same server and stays documented, but the subdomain is the address to configure: it does not bake a version number into anything you publish.

Server card: https://www.knowngate.com/.well-known/mcp/server-card.json
Evidence standard: https://www.knowngate.com/standard and, as a document you can build against, https://www.knowngate.com/standard/v1.json
For agents: https://www.knowngate.com/llms.txt

Authentication. A Bearer key, and a free one is created in-band with the register tool. There is no signup to call this.

Tools

Tool	Rules on
`check_item`	One product or dish
`check_venue`	A whole menu
`check_plan`	A set of items, a recipe, a basket
`register`	Mints a free key, in-band

Verdicts

Every check returns exactly one of four, with the source it rested on and the date that source was read:

no_conflict_found · conflict_found · ask_one_question · couldnt_verify

Unknown counts as no. A claim can create a conflict but never a clear. The word "safe" is not used anywhere in this system. What each verdict means, and the highest verdict each kind of source can reach, is published in full at /standard.

Verdicts are not cryptographically signed in v1.0, and the profile says so (signed_verdicts: false). A saved record at /ck/{id} is the durable artifact: it carries the subject, the premise, the verdict, its source and read date, and the standard version it was issued under.

Licensing

Code: MIT.
Evidence standard (/standard, /standard/v1.json): CC-BY-4.0. Take it and build on it. A standard others build against is worth more to us than a database others cannot see.

Project artifacts

KnownGate challenge brief: project context, challenge requirements, product direction, WebMCP contract, judging strategy, and open decisions captured on 30 August 2026.
KnownGate build brief: implementation requirements, product doctrine, screens, design system, WebMCP tools, API contracts, fixtures, evaluations, and delivery criteria.

Getting Started

First, run the development server:

bash

npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun dev

Open http://localhost:3000 with your browser to see the result.

You can start editing the page by modifying app/page.tsx. The page auto-updates as you edit the file.

This project uses next/font to automatically optimize and load Geist, a new font family for Vercel.

Learn More

To learn more about Next.js, take a look at the following resources:

Next.js Documentation - learn about Next.js features and API.
Learn Next.js - an interactive Next.js tutorial.

You can check out the Next.js GitHub repository - your feedback and contributions are welcome!

Deploy on Vercel

The easiest way to deploy your Next.js app is to use the Vercel Platform from the creators of Next.js.

Check out our Next.js deployment documentation for more details.

restrictions	array	required	Household restrictions. FDA-9 keys ("peanut", "sesame", "milk", …) as strings, or { key, note } when a note matters (e.g. { key: "tree_nut", note: "cashew" }). May be empty when thresholds carry the premise.
subject	object	required
thresholds	array	optional	Numeric premise (beta): per-serving nutrient bounds ruled against the product's typed panel. Unknown values refuse honestly, never zero. An empty array means no numeric limits.

restrictions	array	required	Household restrictions. FDA-9 keys ("peanut", "sesame", "milk", …) as strings, or { key, note } when a note matters (e.g. { key: "tree_nut", note: "cashew" }). May be empty when thresholds carry the premise.
venue	object	required

restrictions	array	required	Household restrictions. FDA-9 keys ("peanut", "sesame", "milk", …) as strings, or { key, note } when a note matters (e.g. { key: "tree_nut", note: "cashew" }). May be empty when thresholds carry the premise.
items	array	required
thresholds	array	optional	Numeric premise (beta): per-serving nutrient bounds ruled against the product's typed panel. Unknown values refuse honestly, never zero. An empty array means no numeric limits.

agent_name	string	required	Who is signing up, e.g. your product name
contact_email	string	required

KnownGate

KnownGate Verify MCP Server

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

Topics

check_item

check_venue

check_plan

register

KnownGate

MCP endpoint

Tools

Verdicts

Licensing

Project artifacts

Getting Started

Learn More

Deploy on Vercel

Install

Remote endpoint

Related servers