The engine, as an API.

Everything the map does, from your own code: which defibrillators are open at a given hour, the nearest one you can actually reach, and the analysis of any list you bring. One click for a key. Nothing to install.

Get a free key

5 requests a second, 1,000 a day. No sign-up, no email. Shown once, so copy it.

Try it live

Pick a call, change anything, send it. With your key it goes to /api/v1, exactly as your code would; without one it uses the site's own route so you can look first.

Endpoint

Query API key

The response appears here.

Endpoints

Base URL /api/v1. Send your key in the x-api-key header. Responses are JSON. Times are local to the city: send at=2026-11-01T03:00, or leave it out for right now.

Call	What it answers
`GET /availability`	How many AED locations are open, locked or unknown at a time. `preset`, `at`, `schoolClose` (15, 18, 21), `includeAi`, `list=1` for every site.
`GET /nearest`	From `lat`, `lon`: the nearest AED by walking time, the nearest one that is open, and how much longer it takes. Walking times from Amazon Location Service. `route=1` adds the walking line; `address=1` adds the street address of the point (Amazon Location reverse geocoding).
`GET /relocation`	NYC schools ranked by after-hours cardiac-arrest calls within a two-minute walk. `limit` up to 100.
`GET /summary`	Every headline number for a preset, with sources.
`GET /presets`	The cities available and how their hours were built.
`POST /analyze`	Bring your own list: `{"timeZone", "sites":[{"name","lat","lon","hours"}]}`. Returns open counts for every hour of a week, peak, trough, unreadable rows, and each site's 336-hour pattern.
`POST /geocode`	Up to 25 addresses to points, with Amazon Location Service.
`POST /isolines`	Up to 25 points to walking areas: `{"points":[[lon,lat]], "seconds":120}`.
`POST /ask`	A question in plain words, `{"question":"Sunday 11 PM near Penn Station"}`, read by Amazon Bedrock into a place and an hour, and geocoded by Amazon Location Service. Pass the result to `/nearest` for the answer. New York only.

Opening hours use OpenStreetMap syntax. Anything unreadable is treated as unknown, never as open.

Street map of East New York with a yellow walking route from a collapse point past a locked AED four minutes away to an open AED a 53-minute walk to the east. — One `GET /nearest` answer, drawn: East New York, Sunday 9 PM. The nearest AED is locked; the route is to the nearest open one. Rendered with Amazon Location static maps.

Street map of P.S. 053 in the Bronx with its two-minute walking area and a fire station 268 metres away. — The first row of `GET /relocation`: P.S. 053 in the Bronx, with a fire station 268 m away. Every row has a printable brief.

Use it from Claude

After Hours is also a remote MCP server, so an AI assistant can call it as a tool: "Which Bronx ZIPs have no defibrillator open after 9 PM?" or "Rank the schools in Harlem to make 24/7."

Claude Code

claude mcp add --transport http after-hours https://YOUR-SITE/api/mcp

Claude Desktop, Cursor or any MCP client that reads JSON config

Tools: aed_availability, nearest_open_aed, relocation_candidates, city_findings, analyze_sites. Read-only, throttled, no key needed.

Fair use

Each key: 5 requests a second, 1,000 a day, set by an Amazon API Gateway usage plan.
Data is open: NYC Open Data terms, Licence Ouverte 2.0 for Géo'DAE. Credit the sources when you publish.
It is a planning tool. Never put it between someone and 911.
The code is Apache-2.0. Run your own copy with one cdk deploy.