# Signalis Pulse AI-Business Narrative Digests

> Signalis Pulse AI-Business Narrative Digests is a paid API for AI agents from api.signalis.dev, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-14).

Returns historical AI-business narrative digests from the Pulse service, supporting poll-based retrieval via a since index parameter

## Facts

- Endpoint: GET https://api.signalis.dev/v1/pulse/digests
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalis-pulse-ai-business-narrative-digests-23704a32
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_I9OhLRtxxRnUqz7mhrIuC

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 signalis-pulse-ai-business-narrative-digests-23704a32
```

Example prompt: Pull me the latest AI-business narrative digests from Pulse — everything that's come in after digest index 42.

## When to prefer this

Use this endpoint when you need to poll for historical AI-business narrative digests from the Pulse service and want a cost-safe pattern where you are never charged on errors or service downtime. Ideal for agentic polling loops that incrementally fetch new digest entries using a cursor-style index.

## Known failure modes

- Pulse service unavailable — no charge incurred, request fails gracefully
- Invalid or out-of-range 'since' integer — may return empty list or error
- Payment failure via x402 protocol — request not fulfilled
- No new digests since the given index — returns empty result set

## How this service works

Paid ($0.03 USDC via x402). Historical AI-business narrative digests (?since=N). Proxied from the Pulse service. Compute-first / settle-after — you are never charged when Pulse is unavailable or returns an error.

## Output

A list of historical AI-business narrative digest entries from the Pulse service, each including at minimum an id and title. Entries are filtered to those occurring after the specified 'since' index. Charged $0.03 USDC only when Pulse is available and returns successfully.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {
      "since": {
       "type": "integer",
       "description": "Digest index to fetch items after (poll pattern)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "charged": true,
  "digests": [
   {
    "id": 1,
    "title": "AI Agent Business Models and Infrastructure Emerge Amid Security and Reliability Concerns",
    "summary": "A surge in discussions around AI agent business models emphasizing extreme scale and token efficiency."
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signalis-pulse-ai-business-narrative-digests-23704a32/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.signalis.dev](https://www.zero.xyz/host/api.signalis.dev/llms.txt)