Addresses you can prove.

Every location, evidence-backed, proved on any phone.

GPS · USSD · SMS · Field-verified · API

Status: closed beta, starting in Nigeria and built for Africa and developing countries worldwide. The Android app is in closed testing. A check against Nigeria's national postcode is being built and tested against NIPOST's test environment; it is not live. Pilots are planned, not yet running.

Built for Africa

It has to work where the network, the phone and the paperwork are not perfect. So AdresX is built around three ways in.

GPS

Any smartphone

Capture your location once, with consent. Nothing is tracked in the background.

USSD

Any basic phone

Digits only, short screens and no data needed. Being tested on real mobile networks.

FIELD

A trained agent

Someone confirms on site, so a person without a smartphone is not left out. The agent mode is in closed testing in the Android app.

What it does

Six ideas, built and tested in the AdresX engine.

A code that checks itself

Every 4.4 metre square has a digits-only code. A wrong digit or a swapped pair is caught before anyone sets off.

A level that shows its evidence

Six levels from declared to authoritative, decided by written rules. Fake GPS and evidence from far away are rejected.

A proof anyone can check

Each level comes as a signed certificate that can be verified offline, without calling us back.

Works on any phone

Basic phones use USSD with digits only. A trained agent confirms on site, and the household sees its verified address.

Presence over time

With consent, repeated check-ins at the address show that someone lives there. A pin dropped from elsewhere stays unproven until they do.

A link, no integration

A bank sends a link by SMS. The customer confirms on site in a minute, and the bank reads the result by API.

Who it is for

People and institutions that need to know an address is real.

Households and villages

An address without a smartphone, shared without exposing your exact location.

Banks and fintechs

Address proof for KYC, with a stated confidence instead of a plain yes or no.

Delivery and logistics

Reach the right door, and catch mistyped codes before a driver does.

Agencies and programmes

Map communities with consent, with coarse and precise access kept apart.

AdresX is built to work alongside national systems such as NIPOST's postcode, not to replace them. A check against the national postcode is being built and tested against NIPOST's test environment; it is not live.

Android app · closed testing

One app, two modes

AdresX is in closed testing now, ahead of a public Google Play release. It works two ways in the same app:

Address owner

Open a link, confirm your location in about a minute, check in again over time, and ask someone who knows you to confirm on your behalf.

Field agent

Try the engine

Everything below runs in your browser, and nothing you enter is sent anywhere.

Code lab

Every 4.4 metre square gets a digits-only code. The last digit is a check digit, so a mistyped code is rejected before anyone drives to the wrong gate.

Country

Latitude

Longitude

Sample points are city centres, not building addresses.

Tap any digit to mistype it. The underlined blue digit is the check digit.

Plus Code (open standard, same square)

Neighbouring squares

Last group of digits for each square. Each is about 4.4 m wide.

National postcode reader

Type or paste a Nigerian national postcode in any common style. This reads its shape in your browser. It does not check the national registry: that check is being built and tested against NIPOST's test environment, and it is not live.

Postcode

The samples are NIPOST's published test postcodes. Do not know yours? NIPOST's postcode finder shows it.

Confidence score

A level and a score, both earned by written rules, not guessed. Change the evidence below and watch which level it reaches, and why.

How it was submitted

Coordinates captured

GPS accuracy (smaller is better)8 m

Phone reports a fake-location app

Device passes integrity checks

Device clock within 5 minutes of the server

Matches the declared locality90%

National code

Photo attached

Photo authenticity90%

Independent attestations (village head, neighbours)

Days the owner checked in at the address (verified device)

Of those, days with an evening or night check-in

Where the pin was dropped

Trained agent on site

Matches an authoritative record

Evidence strength0 / 100

The score summarises how strong the evidence is. The level comes from the rules above it. Weights are illustrative and not yet calibrated.

A basic phone, no data

USSD works on any GSM phone. Keypads only type digits, so codes are entered as digits and the country comes from the shortcode. Screens stay under 160 characters.

Whose phone is this? Type your choice or code

SMS inbox

Try: dial, then 2, then the registered code. Then mistype one digit. Then choose 3 on the new-user phone to start a claim.

About this playground

It runs the same rules as the AdresX core, ported to the browser and checked against the Python original on more than 20,000 generated cases.
Country grids use approximate bounding boxes. Production needs official boundaries.
Score weights are illustrative. They must be calibrated on real pilot data.
The check against NIPOST's national postcode is being built and tested against NIPOST's test environment. It is not live.
Nothing here creates a real address or contacts a real phone.

Contact

AdresX is developed by AGXII Intelligence & Investigations Ltd.

Government agencies and programmes: gov@agxii.org.ng
Banks, fintechs and enterprise, including API access: enterprise@agxii.org.ng

Privacy notice

For developers

Public check, no key needed: /v1/codes/encode
Service status: /v1/health
Registering, resolving and certificates need an API key.