Is there a free tier?

Yes. Create a free account to receive tokens and start exploring immediately — browse world events on the Watchfloor, ask Delta Agent, and view satellite imagery on the Map. No credit card required.

Do I need GIS experience?

No prior experience required. The interface is designed for beginners — navigate the map, search for satellite imagery, ask Delta Agent a question in plain language, and start exploring in minutes.

What satellite data is available?

Access Sentinel-1 C-Band SAR (works through clouds, day or night), NISAR L-Band SAR (NASA/ISRO — penetrates vegetation canopy; provisional calibration), Sentinel-2 optical (10 m resolution, 13 spectral bands), VIIRS Nighttime Lights (NASA Black Marble), and NASA FIRMS Active Fire hotspots (VIIRS 375 m, updated daily). No API key is needed for fire data.

Off-Nadir Delta

Event intelligence · AI-ready OSINT and satellite GEOINT

Off-Nadir Delta: From first signal to evidence.

Source-linked event intelligence for humans and AI.

Turn news reporting and open data into structured, geolocated events. Each one carries the reports behind it, a location only as precise as the reporting allows, and whether it could be seen from orbit. Follow developments and explore the satellite observations available—in the web app, over the REST API, or from your AI agent through MCP.

Seeing the event is easy. Knowing what you can prove—and what evidence is still missing—is the product.

Source-linked · Geolocated · Uncertainty-aware · AI-ready

Explore live intelligenceWatchfloor

Observe from spaceMap Track places & eventsWatchlist Read today's reportReports Explore the APIAPI & MCP

Livesignals ingesting

On every event

Not only that something happened: how well it is located, who reported it, and whether a satellite could see it.

Located, not just mentioned

Raw feeds place an event at country level, or at the city it was reported from. Delta resolves precise coordinates only as far as the reporting names the place, and drops a location that contradicts the reported country. Each event says how far it got: country, town, or the named facility. How events are located

Traceable, not asserted

Every event keeps its original sources and how many separate outlets carried it, and is updated as new reports arrive. The number of outlets shows how widely it is reported; it is not presented as confirmation.

Observable from orbit, or not

Each event says whether what was reported could be seen by a satellite, and why not when it could not. Some events come from a measurement — a heat source, ship counts, a seismic record — and say only what was recorded. Measured events

Trust & transparency

Built for trust. Designed for scrutiny.

Intelligence is only useful when you can examine where it came from, how it was processed, and what remains uncertain.

Traceable sources

Events link back to the reporting they came from. How sources are used, credited and attributed is written down. Sources and attribution

Transparent data practices

How source material is collected, how long it is kept, and what of it is shown are published as a policy you can read. Source & Content Policy

Explicit uncertainty

Where a location stops being precise, where reports conflict, and what a satellite could not show are recorded and stated, not smoothed over. Known limitations

It tells you when it doesn't know

Most of what happens cannot be settled from orbit — the place is too vague, or nothing physical changed. The product records which of those it is, per event, and says so.

Of the 3,015 events read in the last 72 hours, each one that cannot be looked at from orbit carries where it stopped — the location, or whether it would be visible from orbit — and why. These are the most common reasons, counted just now:

592What happened is visible only at about 0.3 m resolution (a single building), which needs the location pinned to a street block or facility; the reports give a coarser one. — stopped at visibility from orbit
359A report names a facility, but it could not be found on the map yet — it can be looked up. — stopped at location
287The reports locate it only to the country — too coarse to point a satellite at. — stopped at location
268event_not_verifiable_from_orbit — stopped at visibility from orbit
252Nothing the reports describe would be visible from orbit. — stopped at visibility from orbit

The same discipline runs through the Agent: see the full run where it refused to assess an event that never happened — factual claims carry their sources, and each brief reports its own citation coverage.

These documents describe how the product works; they are not a guarantee that any single report is true. The output is decision support, not confirmed intelligence. Read Source & Content Policy, Methodology and Trust & Security.

Pipeline activity — last 24 hours, as of 20:31 UTC

News read at scale, folded into events.

Articles are screened, and reports of the same event are folded into one source-linked event.

Articles read: 23,417
Outlets: 4,017
Events identified: 1,304
Countries: 103

Discover · assess · observe · monitor · report

One intelligence loop. Multiple ways to use it.

Every surface answers the next question in the same loop — in the web app, over the API, or from your agent.

One signal layer underneath. World events (conflict, security, disasters, infrastructure) drawn from news worldwide and official hazard feeds, AI-enriched and refreshed every few minutes. The same signals feed the Watchfloor, the Agent and the daily report, and the Agent's findings open on the Map.

Developers & AI agents

Intelligence where your workflows already run.

Bring source-linked, geolocated events into dashboards, analytical pipelines, and AI agents through a REST API and an MCP server — the same intelligence the Watchfloor shows. Included on every plan; calls are metered in tokens (pricing).

1 · FetchPull the events for a region or a category.
2 · CheckRead how precisely each one is located, and who reported it.
3 · WatchPut a place or an event under watch and read what changed.

python

import requests

headers = {"Authorization": "Bearer ond_YOUR_API_KEY"}
params = {}
resp = requests.get("https://offnadir-delta.com/api/v1/signals/86c7e6aa-117d-416f-85f7-75a1067c322d", headers=headers, params=params)
resp.raise_for_status()
print(resp.json())

bash

# Connect once — any MCP client (Claude Code shown):
claude mcp add --transport http off-nadir-delta \
  https://offnadir-delta.com/api/v1/mcp \
  --header "Authorization: Bearer ond_..."

# Then your agent calls the same intelligence as tools:
query_signals {"recency": "24h", "limit": 5}

json

{
  "id": "86c7e6aa-117d-416f-85f7-75a1067c322d",
  "occurred_at": "2026-09-23T00:00:00+00:00",
  "category": "kinetic",
  "title": "Kumul 23 police unit destroys houses and kills eight in Porgera",
  "location": "Porgera Gold Mine",
  "country_code": "PG",
  "lat": -5.4641,
  "lng": 143.0922,
  "plottable": true,
  "stage": "pinpointed",
  "stage_reason": "named_facility_unresolved",
  "severity_score": 8.3,
  "geoint_score": 9,
  "escalation_trend": "new",
  "collection": {
    "level": "GSD<1m",
    "sensor": "vhr-optical",
    "analysis": "damage-assessment",
    "niirs": "NIIRS 5",
    "target": "the damaged structure at Porgera Gold Mine",
    "reason": "the damaged structure at Porgera Gold Mine; vhr-optical + damage-assessment to assess the extent of the damage.",
    "aoi": null,
    "gap": null,
    "observability": 2.22,
    "observable": true,
    "observable_reason": "visible_at_observability_2"
  },
  "reporting": {
    "member_count": 3,
    "distinct_hosts": 2,
    "distinct_texts": 1,
    "source_reliability_best": "B",
    "credibility_best": 2,
    "graded_members": 3
  }
}

Get a free API key Open the Playground Connect via MCP

51 REST operations and 22 MCP tools available right now — counted from the live registry when this page rendered.

Satellite observations

What can available satellite data reveal?

Delta works with open satellite data: Sentinel-1 radar, Sentinel-2 optical, VIIRS nighttime lights and NISAR L-band radar (provisional calibration). It covers the globe on a regular schedule at roughly ten-metre detail. It is not high-resolution commercial imagery.

An assessment, not an observation

Every event states whether what was reported could be seen from orbit, and why not when it could not. That is a judgement made from the reporting. No image has been looked at to make it.

Imagery you open yourself

On the Map you open the scenes over the place and compare dates: radar through cloud and at night, optical in clear daylight. Sentinel-1 and Sentinel-2 are on the free plan; nighttime lights and NISAR are on paid plans.

Visible is not the same as true

An image can show that something changed on the ground. It does not show who did it or why, and seeing no change does not show that nothing happened.

Usually within reach

Flooding over a wide area, through cloud, with radar
Active fires and the burn scars they leave
Ships at a port, a strait or an anchorage
Large changes to the ground between two dates
A drop in nighttime lights over a city

Usually out of reach

Damage to a single small building
Anything that happens indoors
An event that leaves no lasting physical trace
The ground under cloud, for optical imagery

Open the Map Data sources Measured events

Use cases

What it is built for

Geopolitical & Supply-Chain Risk

Geolocated world events, AI intelligence briefs, daily reports, and satellite follow-up for risk, supply-chain, and insurance teams.

How it works

Defense & Maritime Domain Awareness

SAR ship detection, port and chokepoint monitoring, and maritime and security situational awareness with Sentinel-1 radar.

How it works

Disaster Response & Assessment

Flood mapping through cloud with SAR, live active-fire tracking, and before/after comparison of wide-area impact.

How it works

Developers & AI Agents

A REST API for event signals, briefs, and assessments — plus an MCP server that gives AI agents world-event awareness.

How it works

All use cases

Pricing

Start free — no credit card required. Usage is metered in tokens, so you pay only for the imagery and analysis you actually run. For teams, one shared token pool covers everyone on a single bill.

Explore & prototype free · monitor continuously · build & use commercially · operate as a team — the API & MCP server are included on every plan.

See plans & pricing Team plans

Free Tools & Guides

Live tools for checking an area yourself, right in your browser — no account needed — plus step-by-step guides for going deeper

Live Fire Map

WildfireLive tool — no login

Interactive NASA FIRMS map — view wildfire hotspots right on the page, dates back to 2000

Open tool

Free GeoTIFF Viewer

DataLive tool — no login

Drop a .tif and view it instantly — parsed 100% in your browser, never uploaded

Open tool

NDVI Vegetation Map

AgricultureLive tool — no login

Browse live global NDVI on the page, then calculate 10m Sentinel-2 NDVI for your fields

Open tool

Satellite Area Monitoring

Monitoring

Draw any area and track how it changes over time — no GIS, no code

Read guide

Change Detection

Analysis

Compare satellite images before and after any event

Read guide

SAR Flood Mapping

Disaster

Learn to detect and map floods using radar imagery

Read guide

SAR Ship Detection

Maritime

Identify vessels in SAR imagery for maritime monitoring

Read guide

Nighttime Lights

Urban

VIIRS Black Marble imagery for urban growth and power-outage analysis

Read guide

Getting Started Guide Use Cases FAQ

From the Blog

How to read geographic risk from satellite data — practical guides to SAR, spectral indices, change detection, and monitoring

Latest

methodologyseverity

What an Event Severity Level Rests On: Public Thresholds and Where They Run Out

Which public scales define how severe a single event is, which kinds of events have no public scale at all, and how Off-Nadir Delta's Delta Impact Scale assigns a level from them.

Oct 10, 20266 min

Read article

measured eventsnighttime lights

Night Lights, SO2, Earthquakes and Cyclones: Four Measured Events and What Each One Can and Cannot Tell You

Four kinds of event built from instruments and official records instead of news: a city's night lights, sulfur dioxide over a volcano, an earthquake near a facility, and a cyclone's forecast wind field. What each records, and what it leaves open.

Oct 8, 20269 min

Read article

transit anomalychokepoint

What Is a Transit Anomaly? Telling an Unusual Change in Ship Traffic at a Strait from Routine Variation

A transit anomaly is a count of ships through a strait or canal that has left that place's own usual level. How transits are counted from AIS, what moves the count besides a disruption, and how to read it without guessing a cause.

Oct 7, 202611 min

Read article

Start here

Sentinel-1SAR

Getting Started with Sentinel-1 SAR Imagery: A Beginner's Guide

Learn how to access and analyze Sentinel-1 SAR radar data in your browser. This step-by-step guide covers the basics of SAR imagery, how to search for data, and interpret your first radar image.

Updated Aug 23, 20267 min

Read article

change detectionSAR

Change Detection from Space: Three Approaches That Actually Work

Not all change detection methods are equal. This post compares image differencing, NDVI time-series, and SAR coherence-based approaches with real-world guidance on when to use each one.

Jan 22, 20267 min

Read article

monitoringtime series

How to Monitor Any Area with Satellite Time Series: A Complete Guide

Area monitoring with satellite time series lets you automatically track changes in any region over weeks, months, or years. Learn how to set up a monitoring zone, choose the right index, and interpret results using Sentinel-1, Sentinel-2, and VIIRS data.

Updated Jul 11, 202611 min

Read article

View All Articles

Frequently Asked Questions

What to know before you sign up.

Start on the Watchfloor to see where activity is concentrated today — geolocated events (conflict, security, disasters, infrastructure), continuously refreshed, each with a severity score (ranked by imaging value on plans that include it). Then ask Delta Agent why a given event matters; it reasons over the live signals with real intelligence tradecraft and returns a sourced brief that recommends which satellite sensor and area to image — Sentinel-1 SAR for cloud, night, or vessel detection, Sentinel-2 optical for a visual look. Open the recommended scene on the Map to look closer. This "tip-and-cue" workflow takes you from the day's events to the right satellite image without switching tools.

View all FAQs

Start Reading the World Today

Jump back in — your Watchfloor, Delta Agent, the Map, and today's report are one click away.

Open the Watchfloor