# ChronicaPulse Historical Event Research

> ChronicaPulse Historical Event Research is a paid API for AI agents from chronicapulse.vercel.app, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-15).

Returns digitized newspaper coverage of historical wars, disasters, social movements, and world events as primary sources

## Facts

- Endpoint: GET https://chronicapulse.vercel.app/api/chronica/event
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/chronicapulse-historical-event-research-9eb85ccb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pQgfFU5I0LT-G98pJ4Ywy

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability chronicapulse-historical-event-research-9eb85ccb
```

Example prompt: Can you pull up how newspapers covered the 1918 Spanish flu pandemic — I need primary source newspaper articles showing how the media reported on it at the time?

## When to prefer this

Choose this endpoint when you need primary source newspaper coverage of a specific historical event such as a war, disaster, social movement, or world event — as opposed to general person research, obituary lookup, immigration records, or business history. Best for historians, journalists, and researchers needing to understand how contemporaneous media framed major events.

## Known failure modes

- Event not found in digitized newspaper archives — returns empty result set
- Overly broad event query returns too many unrelated results
- Event predates digitized newspaper coverage period — no records available
- Ambiguous event name matches multiple distinct events
- Rate limiting or payment failure if x402 payment not properly authorized

## How this service works

Historical event research for research and historian agents. Returns how newspapers covered wars, disasters, social movements, and world events as primary sources.

## Output

Returns digitized newspaper articles and coverage showing how historical newspapers reported on a specified war, disaster, social movement, or world event, including publication details, article excerpts, and contextual metadata about the media coverage of that event.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "event"
 ],
 "properties": {
  "lang": {
   "type": "string",
   "description": "lang"
  },
  "event": {
   "type": "string",
   "description": "event"
  },
  "year_end": {
   "type": "string",
   "description": "year_end"
  },
  "year_start": {
   "type": "string",
   "description": "year_start"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/chronicapulse-historical-event-research-9eb85ccb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chronicapulse.vercel.app](https://www.zero.xyz/host/chronicapulse.vercel.app/llms.txt)