Now running pilots in returns and resale

Proof of authenticity that AI agents and robots can read.

Photonictag gives every product one tamper-proof identity. Shoppers scan it, returns desks check it, and AI agents verify it on their own, all against a record only the brand can sign.

Start a pilot Verify a product
Verified authentic0.3 s

Photonic Demo

Demo tote bag

Serial
DEMO0002
Made in
Italy
Color
Cognac
Material
Calf leather
Signed by
Photonic Demo · key b61a…9a58
Brand signature QR code Photo watermark

A real result from our live demo product. Open it.

Built on open standards GS1 Digital Link Ed25519 signatures Invisible watermarks Model Context Protocol
How it works

One identity, readable by people and machines.

No new scanners, no chips. It works with the phone cameras and AI assistants people already use.

01

The brand signs each item

Every unit gets a record (serial, origin, materials) signed with a key only the brand holds. Nobody can forge or quietly edit it.

02

It travels with the product

A standard GS1 QR code goes on the item, and the same ID is hidden invisibly in product photos, so images carry proof too.

03

Anyone verifies in a second

Shoppers scan, warehouses check returns, and AI agents call our verification tools. Each gets a clear verdict with the evidence.

Use cases

Built for the moments where fakes cost money.

Returns processing

Confirm a return is the exact unit you sold before you refund it. Swapped fakes go to review automatically; genuine items are routed to restock, refurbish or recycle.

Luxury and resale

Marketplaces verify authenticity from a photo and check every seller claim, like origin and material, against the brand's signed record.

AI shopping agents

Agents from Claude, ChatGPT and others connect to our MCP server and verify products on their own. No more trusting whatever a web page says.

For AI agents

Verification as a tool call.

Add Photonictag to any MCP-compatible assistant in one line. Agents get signed facts and a verdict, never a guess.

Developer docs

Claude, ChatGPT or any MCP client

MCP server  https://tag.photonictag.com/mcp

> Is the bag at this link genuine, and is the
  seller's "made in France" claim true?

verify_product_link   → verified · Photonic Demo
check_listing_claims  → origin: contradicts (Italy)
Pilot program

See it on your own products.

We are onboarding a small number of teams in returns processing and luxury resale. A pilot takes about four weeks and needs no new hardware.