# SignalsFeed Policy & Signal Feed

> SignalsFeed Policy & Signal Feed is a paid API for AI agents from www.signalsfeed.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Retrieves AI, semiconductor, and macro market signals with credibility scoring; supports free discovery/pagination and paid premium unlocking via x402 micropayments

## Facts

- Endpoint: GET https://www.signalsfeed.com/api/v1/policy?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalsfeed-policy-signal-feed-d530d0a1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_f6fepim8vsa3rVip8mF2X

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 signalsfeed-policy-signal-feed-d530d0a1
```

Example prompt: Pull up to 20 premium-quality signals from SignalsFeed covering AI and semiconductor topics — use quality_status=premium, include topics, and show me a preview teaser too.

## When to prefer this

Use this endpoint when an agent needs credibility-scored, curated signals about AI, semiconductor, or macroeconomic topics with source attribution; especially when the agent supports x402 micropayments and wants to unlock premium full-text signals for $0.01 USDC. Prefer over generic news APIs when signal quality scoring and domain specificity (AI/semis/macro) matter.

## Known failure modes

- Payment not received or insufficient USDC — returns 402 with payment requirements
- Invalid UUID format in ids parameter — returns 400 or empty signals array
- Invalid cursor string — returns 400 or resets pagination
- Invalid quality_status enum value — returns 400 validation error
- since timestamp in wrong format — returns 400 date parse error
- Rate limiting or service unavailability — returns 429 or 503

## How this service works

SignalsFeed is a signals feed for AI agents: verified AI, semiconductor, and macro signals with credibility scoring, source links, and x402 micropayments. $0.01 returns up to 20 premium full signals.

## Output

A JSON object containing a count of signals, their format (e.g. 'full'), and an array of signal objects with credibility scores, source links, observation dates, and topic metadata; also includes a next_cursor for pagination and has_more flag.

## Request schema (JSON Schema)

```json
{
 "properties": {
  "input": {
   "properties": {
    "body": {
     "type": "object",
     "properties": {},
     "additionalProperties": false
    },
    "queryParams": {
     "type": "object",
     "required": [
      "ids"
     ],
     "properties": {
      "ids": {
       "type": "string",
       "description": "Comma-separated article UUIDs. Max 20 per paid request."
      },
      "limit": {
       "type": "integer",
       "default": 20,
       "maximum": 20,
       "minimum": 1
      }
     },
     "additionalProperties": false
    }
   }
  },
  "output": {
   "properties": {
    "example": {
     "count": 0,
     "format": "full",
     "signals": []
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "count": 0,
  "format": "full",
  "signals": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signalsfeed-policy-signal-feed-d530d0a1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.signalsfeed.com](https://www.zero.xyz/host/www.signalsfeed.com/llms.txt)