The FactStamp MCP server,
connected in one click.
Verify a company, figure or citation before you rely on it. Card or crypto; signed receipt. Connect the official FactStamp MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add FactStamp 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 factstamp-agents https://agents.factstamp.dev/mcpRun in your terminal, then restart Claude Code.
FactStamp · https://agents.factstamp.dev/mcp
What your AI can do with FactStamp
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “list_series”: Free. What this engine covers, the publisher and as-of date behind each series, and the no-guess rule.”
“Use “route_claim”: Free. Shows which series a claim would be routed to, the value and date extracted, and the signals behind the score. Returns NO verdict — pa.”
“Use “check_figure”: Submit the dated figure you are about to act on. Returns verified, stale, contradicted or unknown, cited to the publisher's own series with.”
“Use “check_entity”: Verify a legal entity: does this company exist, under which identifier and jurisdiction, and is its registration current? Cited to open prim.”
How secure is the FactStamp MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how FactStamp holds up.
Official endpoint
Operated by FactStamp (factstamp.dev) 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 FactStamp adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
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 FactStamp
Choose FactStamp in the gate directory. No sign-in needed.
Use it anywhere
FactStamp's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools FactStamp exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
list_series — Free. What this engine covers, the publisher and as-of date behind each series, and the no-guess rule.
route_claim — Free. Shows which series a claim would be routed to, the value and date extracted, and the signals behind the score. Returns NO verdict — pa
check_figure — Submit the dated figure you are about to act on. Returns verified, stale, contradicted or unknown, cited to the publisher's own series with
check_entity — Verify a legal entity: does this company exist, under which identifier and jurisdiction, and is its registration current? Cited to open prim
check_entity_file — The entity file: ONE paid answer holding everything we hold about one company. Reach for it before you sign, onboard, pay or acquire a count
check_sanctions — Screen a name before you transact with it: is this person or company on a sanctions list, and which one? Checks OFAC SDN, the UN consolidate
check_vat — Check an EU VAT number before you rely on it: is this number a live VAT registration, and who is behind it? Asks the official VIES service (
verify_citation — Check a citation before you repeat it. Submit a DOI, an arXiv ID or a paper title: returns whether it exists, what it is (title, authors, ye
+ 5 more tools once connected
Who runs the FactStamp MCP server?
The FactStamp MCP server at a glance
https://agents.factstamp.dev/mcpQuestions, answered
Is there an official FactStamp MCP server?
Yes — FactStamp operates its own remote MCP server at agents.factstamp.dev. 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 FactStamp to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick FactStamp in the directory. No account or sign-in is needed. From then on, FactStamp's tools are available in every client you've connected to gate.
Do I need to host anything?
No. FactStamp runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the FactStamp 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.
Is it free?
Yes — you can get started with gate for free and connect FactStamp in minutes. No credit card required.
Connect more than just FactStamp
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up FactStamp in: Claude · Claude Code · ChatGPT · Cursor · VS Code