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Stackfacts MCP server

Which MCP servers are Stackfacts's own, from the official registry and from asking its own domain, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-26

← Back to Stackfacts

Whose server it is
  • Registry namedev.stackfacts/stackfactsverified in the MCP registry

The registry name sits under stackfacts.dev. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools4
  • Server calls itselfstackfacts
  • Server version0.3.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 132 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: Compare hosting platforms for a new web app; Compare hosted database options for a new web app.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • For "Compare hosting platforms for a new web app", the likely first call is list_categories.
  • For "Compare hosted database options for a new web app", the likely first call is list_categories.
  • Parameters are untyped or undescribed in 2 of 4 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 1, the first on 2026-10-26
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • What an agent can do with it2 of 2 use cases
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer698 ms
  • Space in an agent's context≈ 444 tokensthe definitions of all its tools (4), which an agent carries on every turn
  • Tool definitionsB · 75 of 100
  • Typed results0 of 4 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 2 of 4
  • Not saying whether it only reads or can destroy: 4 of 4

What an agent can do with it

  • can do · Compare hosting platforms for a new web app
  • not sure · Pick a login provider for a Next.js app
  • can do · Compare hosted database options for a new web app

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (25%), doing the product's job (25%), definitions (20%), context (10%), use (10%) and how readily a client connects (10%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers4 tools · read 2026-10-26
  • list_categories

    List the software categories Stackfacts has checked facts for (for example login for Next.js, hosted databases, app hosting). Call this first when you need to choose a library or service.

  • compare

    Get sourced, dated facts for every option in one category: price, free tier, what happens when idle, published security record where available, and whether an agent can set it up without a human. Includes a pick for each common situation…

  • option

    Get the full checked facts and sources for one option in a category, e.g. Clerk in nextjs-auth.

  • request_category

    Tell Stackfacts about a choice you needed facts for that it does not cover yet (for example 'transactional email for a Python app'). Helps decide what gets checked next.

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "stackfacts": {
      "type": "http",
      "url": "https://stackfacts.dev/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http stackfacts https://stackfacts.dev/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://stackfacts.dev/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.