EdgeNFC
EdgeNFC
Where to buy blanks
EdgeNFC is software: we provision and verify tags, we don't sell them. Buy blank NTAG 424 DNA tags from a specialist supplier — we recommend GoToTags — and the free EdgeNFC app turns them into tags that prove they're real.
Buy tags from GoToTags · Provision with the free EdgeNFC app · Verify every tap
What to buy
One sticks to things, one survives things. Both are the same chip — which is the part that matters.
EdgeNFC verifies a tap using SDM/SUN (a per-tap counter and CMAC the chip generates itself). Only the NTAG 424 DNA has that hardware. NTAG 213, 215, 216, NTAG 424 DNA TT-only listings, Mifare, and "NFC sticker" generic parts will not work — they cannot be provisioned and every tap will fail to verify. Check the chip name on the product page before you pay.
The cheapest way to put a verifiable tag on something. Peel-and-stick, then hide it under a label, a card, or packaging.
Pay a little more for something that survives handling. The sane choice for keychains, asset tags and anything outdoors.
Prices are list prices at GoToTags, shown per tag at the quantity break noted. They are approximate and subject to change — the GoToTags store is the authority, and shipping and tax are extra. EdgeNFC does not sell tags, take a commission, or handle your order; you buy from GoToTags under their terms. See Tags & third-party hardware.
Different size, PVC card, tamper loop, on-metal or printed artwork? Browse every NTAG 424 DNA tag at GoToTags — or start at the GoToTags store.
How it fits together
Any genuine NTAG 424 DNA tag from any supplier works — GoToTags is simply who we'd buy from. Tags arrive unprovisioned with factory keys, which is exactly what you want.
The EdgeNFC Android app writes your own key and configures SDM on the tag. We never hold a copy of a DIY master key; hosted keys are envelope-encrypted.
A tap opens a URL carrying a counter and a CMAC. Our Rust/Wasm core checks it — hosted, or on your own infrastructure with a DIY edge package.
You don't need a tag to try it. Test a Tap in the app simulates a genuine tap in your browser, so you can see the whole flow first.
FAQ
The product listing must say NTAG 424 DNA in the chip specification — not "NTAG 424 compatible", not "NFC tag 888 bytes", not NTAG 213/215/216. If a listing won't name the chip, don't buy it. Suppliers who serve developers, like GoToTags, always state it.
Adhesive wet inlay if the tag disappears into something you make (labels, packaging, under artwork) and cost per tag matters. Rigid PVC token if it gets handled, hung on a keyring, or lives outdoors. Neither reads well stuck directly to metal — for that, buy a tag specifically rated on-metal.
Ten. Provisioning is unforgiving to learn on your only tag, and the price break below 100 units is small anyway. Move to 100 or 1,000 once your flow works end to end.
Yes, and nothing in EdgeNFC checks where a tag came from. We name GoToTags because they list the exact chip, sell in small quantities, and ship internationally. Any genuine NTAG 424 DNA tag from any supplier provisions and verifies identically.
No. The Sandbox plan is free — 100 active tags, unlimited scans, no card. Paid plans raise the active-tag limit and add features; the provisioning app is free either way.
We built that store and then chose not to run it. Selling physical goods makes us the merchant of record for sales tax, shipping and returns in every jurisdiction we ship to — overhead that would come straight out of building the product. Buying direct from a specialist gets you a better price and more choice than we could offer anyway.