Authorized.by MCP server
Featured official server
7 tools · Last check that passed 4 Nov 2026, 12:15 UTC
Authorized.by's own remote MCP server gives an agent authorized.by's directory of the retailers that brands have authorized to sell their products, with brand and retailer profiles, certificate links and a check of one shop against a brand or a product's GTIN, with no account or API key. Once a day, Stackduke connects to it the way any MCP client would, with no account and no sign-in, and lists its tools. It never runs them.
All 7 tools
| Tool | Counted as |
|---|---|
get_brand | Said to only read |
get_brand_retailers | Said to only read |
get_brands | Said to only read |
get_retailer | Said to only read |
get_retailer_brands | Said to only read |
get_retailers | Said to only read |
verify_retailer_authorization | Said to only read |
The tools the server listed at the last check that passed, at its default address and settings, with no sign-in; an account that signs in, or other settings, may see other tools. What a tool is counted as doing is Stackduke's cautious reading of the server's labels, the tool's name and its description: where they disagree it takes whichever says the tool can do most, so it overcounts on purpose. It does not say the server is safe, and it does not list what a tool cannot do. Descriptions are not shown, because they are written for models and may try to steer them.
Recent checks
21 of the last 21 checks passed
A check passes when the server lists its tools. Checked at https://app.authorized.by/api/public/mcp.
Recent changes
28 Oct 2026, 10:43 UTC, after a check on 27 Oct 2026, 09:55 UTC
Description rewritten on get_brands, get_retailers. Inputs or outputs changed on get_brands, get_retailers.
23 Oct 2026, 09:49 UTC, after a check on 22 Oct 2026, 09:41 UTC
1 tool added: verify_retailer_authorization. Description rewritten on get_brand_retailers. Title changed on get_brand, get_brand_retailers, get_brands, get_retailer, get_retailer_brands and 1 more. The server's own labels changed on get_brand, get_brand_retailers, get_brands, get_retailer, get_retailer_brands and 1 more.
From the scan of 4 Nov 2026, 12:43 UTC. "Changed" and "Can do more" count changes from the last 30 days; older ones stay listed here. A change made and undone between two checks is not seen. Every check is in the scanner's public data.
Know when Authorized.by's tools change.
One email when Authorized.by's official MCP server adds, removes or changes tools, with what changed. Nothing else.
What to watch for
- authorized.by says only an AUTHORIZED status confirms an authorization. No record, or a shop or brand that is not registered, does not prove the opposite, because authorizations can exist outside its directory. authorized.by's MCP server page
- get_brand_retailers sorts retailers by subscription plan, paid plans first, and authorized.by says this order is not a ranking of quality. authorized.by's MCP server page
- Brand descriptions and retailer profiles come back to the agent as text, and text an agent reads can carry instructions for it. OWASP, prompt injection
How to limit it
With Authorized.by's own settings, as its documentation describes them. Stackduke has not tested them.
- authorized.by says the server needs no account or API key, so we recommend connecting it with no authorized.by credentials. authorized.by's MCP server page
- Have the agent report only the relationships the server returns, each with its certificate link, as authorized.by advises. authorized.by's MCP server page
What Stackduke is designed to do
Stackduke is designed to sit between your agents and their MCP servers: to check each tool call against your rules before it runs, hold the risky ones for a person to approve, and keep a record of what was decided.
It does not yet forward or block tool calls for customers. Today it reads what this server offers and publishes what changes.