Off-Nadir Delta

Off-Nadir Delta MCP

From first signal to satellite evidence. Give an AI agent a live intelligence workflow: discover an event, verify the reporting, identify what evidence is missing, determine whether a satellite can actually resolve it, and produce a collection-ready plan.

Real-time event and geospatial intelligence for OSINT, geopolitical risk, and GEOINT work — source-linked, geolocated, and current, not a training snapshot.

23 tools · MCP server version 5.11.0 · full reference

What it does

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

• monitors emerging world events and geolocates them
• checks claims against source-linked open data, and reports the source breadth behind each one
• assesses whether the event is observable from space, at what resolution, and by which sensor
• returns a collection-ready recommendation: what to collect, where, and when

Connect

Hosted server — recommended

No install. Point any MCP client at the remote endpoint and approve once over OAuth 2.1 (Dynamic Client Registration is supported, so most clients need only the URL):

https://offnadir-delta.com/api/v1/mcp

In the Claude or ChatGPT apps: Settings → Connectors → Add custom connector, paste that URL. Cursor and VS Code have one-click installs on the docs page.

Claude Code:

claude mcp add --transport http off-nadir-delta https://offnadir-delta.com/api/v1/mcp

This package — local stdio

Use this when your client cannot do remote OAuth, or you would rather hold an API key in an environment variable and pin a version. Get a key at offnadir-delta.com/account/api.

{
  "mcpServers": {
    "off-nadir-delta": {
      "command": "npx",
      "args": ["-y", "offnadir-delta-mcp"],
      "env": { "OFFNADIR_DELTA_API_KEY": "ond_..." }
    }
  }
}

Docker:

docker run -i --rm -e OFFNADIR_DELTA_API_KEY=ond_... offnadir-delta-mcp

The package forwards tools/call to the hosted server with your key. tools/list answers locally from a generated catalog, so registries can introspect it without credentials.

First call — free

12 of the 23 tools cost nothing, so the first thing you run is free:

Give me the latest Daily World Brief. Lead with the three most significant developments, explain why each matters, and cite the supporting signals.

Then try the full signal-to-satellite workflow:

Find the highest-priority observable event from the last 24 hours, verify the reporting, and recommend the best available satellite collection plan.

Tools

Discover

What is happening, what changed, and what today looks like.

Tool	What it does	Cost
query_signals	Geolocated world events from news, hazard feeds and satellite measurements, AI-enriched with severity/GEOINT scores and collection recommendations.	3–5 tok
get_world_brief	AI world brief: daily (prior UTC day, all plans) or weekly/monthly by plan.	free
query_developments	What actually CHANGED about the events in an area, not which articles are new.	3–5 tok
get_event_thread	One event end to end: state plus every change in order — the "new event or update" distinction a feed cannot make.	free
search_entities	Find a named place (airport, base, plant, port, dam, strait…) in any language or by IATA/ICAO code.	1 tok
get_entity	What has happened at one place: the registry record plus its most recent linked events, each with HOW it was linked.	1 tok
get_related_events	The relations recorded for one event: others at the same registry facility, naming the same place, or stored as the same campaign, each saying what is shared; plus reports merged into it.	1 tok
get_vessel	Where a warship was reported in the last 30 days (official releases, U.S.	free

Plan

Whether a satellite can resolve it, which one, and when it next passes.

Tool	What it does	Cost
search_imagery	Search the imagery catalog over an area and window.	2 tok
plan_event_imagery	The deterministic imagery plan for ONE event: checks sentinel-1-grd (SAR, the only look that survives cloud and night) and sentinel-2-l2a exactly once each — plus NISAR L-band for flood_mapping (water under tall vegetation) — against the event footprint and a pre/post window.	4 tok
rank_imaging_priority	WHERE, and with what class of satellite, observation is most worthwhile now: composite IMPORTANCE crossed with the SPEC CLASS the required resolution demands — coarse, hr (free Sentinel-class) or vhr.	1 tok
predict_satellite_passes	WHEN a place can next be imaged and by WHAT: 13 free-systematic and commercial-taskable families.	2 tok

Analyze

Turn reporting into a cited assessment you can audit afterwards.

Tool	What it does	Cost
assess_signal	AI remote-sensing deep-dive for one signal: what to observe, sensors, a collection window.	5/15 tok
ask_analyst	Ask the Delta Analyst an OSINT/GEOINT question; returns a structured brief.	5–123 tok
get_analyst_job	Status and result of an ask_analyst run.	free

Watch

Stand up continuous coverage and be told only when the answer changes. Creating and listing cost nothing — you are metered only when a check actually fires, or a new acquisition is actually measured.

Tool	What it does	Cost
list_watches	The Watchlist as one list, each entry with a state bucket.	free
list_notifications	What changed across the Watchlist, newest first: one row per change a watch reported, with read state.	free
get_watch	One watch end to end: target, state, latest change, measurements with recent series, standing-order questions, and for an event watch its stage, developments, imagery check and thread, plus this account's notes.	free
create_watch	Add a target to the Watchlist.	free
update_watch	Pause, resume or close a watch.	free
delete_watch	Delete a watch and its underlying resources — bound monitored areas with their history, and standing orders.	free
add_note	Add a note to a watch, start a thread, or reply.	free

Account

Pre-flight your token balance before a metered call.

Tool	What it does	Cost
get_usage	The calling key's remaining token balance and plan capabilities.	free

Pricing and metering

Usage-based Delta tokens, identical over REST and MCP. Costs above are generated from the same constant the biller reads, and every metered result carries the exact charge it incurred — so you never have to trust a number in a README. Free tools never touch the balance.

ask_analyst is hybrid-async: it enqueues a run and returns a job_id immediately; poll get_analyst_job (free — the run is charged once, on completion). Most questions finish in ~30–90s; a brief with satellite-imagery lookups or many sources can take 2–3 minutes.

API and MCP access. Available on every plan, including Free. Calls are metered on your token balance, and what each call returns follows your plan — a call your plan does not open says which plan does. Call get_usage (free) to pre-flight. Current limits and package prices: offnadir-delta.com/pricing.

Authentication

Two credentials are accepted on the hosted endpoint:

• OAuth 2.1 with PKCE and Dynamic Client Registration — for interactive clients
• Bearer API key (Authorization: Bearer ond_...) — for servers, CI, and this stdio package

Keys are shown once at creation, hashed at rest, and revocable at any time from /account/api.

Resources

Resource	Description
brief://latest	The most recent AI-synthesized Daily World Brief (JSON). Free.
signals://schema	JSON Schema of the public Signal shape returned by query_signals / /api/v1/signals.
usage://current	Remaining token balance and plan capabilities for the calling key. Free.
status://current	How current the data is (ingestion/enrichment frontier), the Daily World Brief status, and an Operational/Delayed/Degraded roll-up. Free.
brief://{date}	The Daily World Brief for a specific UTC date (YYYY-MM-DD). Free.
watch://{watch_id}	A Watchlist entry with its current state, latest meaningful change, measurements, (for event watches) the full event thread, and the notes kept against it. The same body get_watch returns. Free.

Links

• Tool reference, setup, and one-click installs
• REST API reference · OpenAPI
• Changelog and compatibility policy
• Live server version probe (no auth, no tokens)

License

Apache-2.0