Community · Official remote MCP server

The Concordance MCP server,
connected in one click.

Deterministic claim verification with receipts across ~60 domains. No model in the loop. Connect the official Concordance MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect Concordance free How it works

Free to start · No credit card · No hosting needed

What you can do

What your AI can do with Concordance

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

“Use “verify”: Verify a claim deterministically — returns a verdict (HOLDS / BROKEN / INCOMPLETE / SYSTEM_ERROR), the worked trail, AND a sealed receipt {c.”

“Use “audit”: Audit a whole text: deterministic extractors find every checkable quantitative claim (sums, percentages, hourly/annual pay, compound interes.”

“Use “search”: Ranked search over the keeping (the kept library).”

“Use “seal_fetch”: Fetch a sealed verification record (the receipt) by its content hash.”

Security check

How secure is the Concordance MCP server?

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

✓ Verified directory serverConcordance · narrowhighway.com

Official endpoint

Operated by Concordance (narrowhighway.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 Concordance adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on Concordance'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 Concordance

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

Use it anywhere

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

Connect Concordance free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools Concordance exposes

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

verify — Verify a claim deterministically — returns a verdict (HOLDS / BROKEN / INCOMPLETE / SYSTEM_ERROR), the worked trail, AND a sealed receipt {c

audit — Audit a whole text: deterministic extractors find every checkable quantitative claim (sums, percentages, hourly/annual pay, compound interes

search — Ranked search over the keeping (the kept library).

seal_fetch — Fetch a sealed verification record (the receipt) by its content hash.

redact — Strip PII (emails, SSNs, credit cards, IPs, URLs) from text to stable placeholders before you pass it onward; the mapping is returned so YOU

card_get — Fetch one card (the full record) from the keeping by id.

cards_browse — Browse the keeping — paginated, optional shelf filter. Returns card briefs.

decks — The decks — curated card SETS, both by-situation (need decks, frontloaded for a moment of need like 'when the power goes out') and by-domain

+ 86 more tools once connected

Server facts

The Concordance MCP server at a glance

Endpointhttps://narrowhighway.com/mcp

Operated byConcordance (narrowhighway.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 Concordance MCP server?

Yes — Concordance operates its own remote MCP server at narrowhighway.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 Concordance to Claude or ChatGPT?

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

Do I need to host anything?

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

Is the Concordance 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.