Build with Off-Nadir Delta
Quick answer — what Off-Nadir Delta is
Off-Nadir Delta turns global news media and official hazard feeds into geolocated, source-linked event intelligence. Query it over a REST API, the open-source Python SDK, or an MCP server for AI agents — events and what changed about them, satellite imagery and collection planning, the Watchlist, the World Brief and AI analysis. All three are available on every plan, including Free, and metered calls spend your token balance.
Choose how to connect
| Your own code — a backend, a dashboard, a script | REST API | Every operation and every field under /api/v1, cursor-paginated up to 500 rows a page, with an OpenAPI 3.1 spec. |
| Python, or an agent that runs code (Claude Code, Codex, Cursor) | Python SDK | The same API with typed models, sync and async clients and automatic pagination. |
| A chat — claude.ai, ChatGPT, Claude Desktop, an editor | MCP server | The tools meant for a conversation; list results are digests that fit in a chat. |
| A ChatGPT custom GPT | GPT Actions | The conversational operations of the REST API in an OpenAPI document sized for Actions. |
What you can pull
Event signals
GET /api/v1/signalsGeolocated geopolitical, security, disaster and infrastructure events from global news media and official hazard feeds — how precisely each is placed, severity, reporting breadth, and whether a satellite could see it.
What changed
GET /api/v1/developmentsChanges to events in an area — new events told apart from updates to known ones — and one event end to end with every source behind it.
Imagery and collection planning
GET /api/v1/imagerySentinel-1, Sentinel-2 and NISAR L-band scenes over an area, the SAR + optical plan for one event, where imaging is most worthwhile, and the next satellite passes.
Watchlist and continuous watch
/api/v1/watchesWatch events, areas and sites; monitored areas measured on every new acquisition; standing orders that report only when something new crosses the bar.
World Brief
GET /api/v1/briefThe AI-synthesized daily brief (free of tokens); weekly and monthly by plan.
AI analysis
POST /api/v1/analystAsk the Delta Analyst a question and get a cited brief, or an AI remote-sensing assessment of one event.
Quickstart
1. Create a key at Account → Developer API (shown once — keep it out of client-side code). 2. Verify it with the World Brief, which is free. 3. Query events (3 tokens a page).
# Free — a 200 means your key works
curl -H "Authorization: Bearer ond_..." "https://offnadir-delta.com/api/v1/brief"
# Armed conflict and strikes reported in an area over the last 24 hours
curl -H "Authorization: Bearer ond_..." \
"https://offnadir-delta.com/api/v1/signals?bbox=22,44,40,53&recency=24h&categories=armed_conflict,kinetic&limit=50"Python SDK
offnadir-delta wraps every REST endpoint with typed models (Pydantic v2), sync and async clients, automatic cursor pagination, retries with backoff and one exception hierarchy, plus a small client for the MCP server. Python 3.9–3.13, Apache-2.0.
# pip install offnadir-delta
from offnadir_delta import Client
from offnadir_delta.errors import InsufficientTokensError
with Client() as client: # reads OFFNADIR_DELTA_API_KEY
print(client.usage().tokens.remaining) # free
page = client.signals.list(
bbox=[22, 44, 40, 53], recency="24h", categories=["armed_conflict", "kinetic"], limit=50
)
for signal in page.signals:
print(signal.last_reported_at, signal.country_code, signal.title)
# Every page (a date range needs a plan that includes it):
try:
for signal in client.signals.iterate(bbox=[22, 44, 40, 53], recency="24h"):
...
except InsufficientTokensError as e:
print("Need", e.required, "have", e.available)AsyncClient has the same methods (async for signal in client.signals.iterate(...)). Source & README · PyPI · Runnable examples
Next
API reference
Every endpoint, parameter and example; errors, rate limits and pagination.
OpenAPI Playground
Run real requests in the browser with your key and copy the cURL, Python or TypeScript.
OpenMCP & AI agents
Connect claude.ai, ChatGPT, Claude Code, Cursor or VS Code; instructions for coding agents; GPT Actions.
OpenRecipes
Whole workflows — web, REST, Python and MCP side by side.
OpenChangelog
What changed for integrators, newest first.
OpenOpenAPI spec
The machine-readable OpenAPI 3.1 document.
OpenFrequently Asked Questions
Which plans include the API, the SDK and the MCP server?▼
How do I authenticate?▼
What are the rate limits and pagination?▼
Is there an OpenAPI spec?▼
From headline to satellite evidence
One connected intelligence workflow across four surfaces — free to start, no GIS software or remote-sensing background required.