Community · Official remote MCP server

The Principia MCP server,
connected in one click.

Source-graded registry of organizational measurement: constructs, priors, instruments, citations. Connect the official Principia MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect Principia free How it works

Free to start · No credit card · No hosting needed

Use this server

Add Principia to your AI in one minute

Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.

claude mcp add --transport http principia https://peopleprincipia.com/api/mcp

Run in your terminal, then restart Claude Code.

Principia · https://peopleprincipia.com/api/mcp

What you can do

What your AI can do with Principia

Real prompts you can type the moment it's connected — no setup, no docs to read.

“Use “principia.constructs.list”: List canonical constructs (resolved CanonicalVariable rows). Supports limit/offset, engagement_family_only, and abstraction_level (PRN-271).”

“Use “principia.constructs.lookup”: Lookup one canonical construct by variable_id. Unknown ids return found:false (soft validation).”

“Use “principia.constructs.search”: Keyword search over construct name + definition + alternative_names + variable_codes.”

“Use “principia.constructs.resolve”: Resolve a source-side construct {name, definition?, variable_code?} against the canonical store. READ-ONLY — does not mutate. Uses meta-fact.”

Security check

How secure is the Principia MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Principia holds up.

✓ Verified directory serverPrincipia · peopleprincipia.com

Official endpoint

Operated by Principia (peopleprincipia.com) at its documented MCP endpoint — not a third-party mirror or community re-host.

No sign-in needed

This server only exposes public data — no account and no credentials are involved when you connect.

Scanned before it goes live

gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.

Watched for drift

If Principia adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on Principia's server →

How it works

Connected in three steps

Connect your gate

Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.

Pick Principia

Choose Principia in the gate directory. No sign-in needed.

Use it anywhere

Principia's tools are live in every AI client you've connected — with rules and logging built in.

Connect Principia free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools Principia exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

principia.constructs.list — List canonical constructs (resolved CanonicalVariable rows). Supports limit/offset, engagement_family_only, and abstraction_level (PRN-271).

principia.constructs.lookup — Lookup one canonical construct by variable_id. Unknown ids return found:false (soft validation).

principia.constructs.search — Keyword search over construct name + definition + alternative_names + variable_codes.

principia.constructs.resolve — Resolve a source-side construct {name, definition?, variable_code?} against the canonical store. READ-ONLY — does not mutate. Uses meta-fact

principia.instruments.list — List InstrumentCard rows. Optional construct_id filter narrows to instruments covering a given construct.

principia.instruments.lookup — Lookup one instrument by instrument_id. Unknown ids return found:false.

principia.instruments.search — Keyword search over instrument_name + developer + constructs_covered.

principia.items.lookup — Lookup one survey item by item_id. SPEC §6/Q4 enforced: items_license != public_domain|open returns status:'restricted'.

+ 27 more tools once connected

Author

Who runs the Principia MCP server?

peopleprincipia.com

Homepage More servers from peopleprincipia.com →

Own this server? Claim the listing →

Server facts

The Principia MCP server at a glance

Endpointhttps://peopleprincipia.com/api/mcp

Operated byPrincipia (peopleprincipia.com)

CategoryCommunity

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official Principia MCP server?

Yes — Principia operates its own remote MCP server at peopleprincipia.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.

How do I connect Principia to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick Principia in the directory. No account or sign-in is needed. From then on, Principia's tools are available in every client you've connected to gate.

Do I need to host anything?

No. Principia runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the Principia MCP server safe to connect?

It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.