# Isocast Weather SPOT Signal

> Isocast Weather SPOT Signal is a paid API for AI agents from api.isocast.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Returns the single latest observed weather signal for a specified city as a one-time snapshot, charged $0.01 per call via x402.

## Facts

- Endpoint: GET https://api.isocast.dev/v1/spot
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/isocast-weather-spot-signal-56d3f818
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Y0OOfoW_6USPar0pvJDpI

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 isocast-weather-spot-signal-56d3f818
```

Example prompt: What's the latest weather signal for Istanbul right now — just a single current reading?

## When to prefer this

Use this endpoint when you need exactly one current weather data point for a specific city and want a lightweight, flat-fee ($0.01) paid lookup. Prefer this over the bundle endpoint when you only need one signal, not a sequence. Ideal for agents that need a quick weather pulse check without committing to historical or forecasted data.

## Known failure modes

- Unknown city slug returns no charge and no data (graceful empty response)
- City has no data yet — returns uncharged empty response
- Invalid city slug format returns an error
- Missing required 'city' query parameter returns a validation error
- Payment failure via x402 prevents data delivery

## How this service works

Latest observed weather signal for one city — a single-signal SPOT snapshot (like a market-data quote). Flat $0.01, payable by a STOCK x402 client (no binding nonce). Never returns history or more than one signal. Uncharged on unknown-city / no-data-yet.

## Output

A single flat weather signal snapshot (SPOT) for the requested city — the most recent observed reading. Returns no data charge if the city is unknown or has no data yet. Contains one signal object with current weather conditions.

## 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": [
      "city"
     ],
     "properties": {
      "city": {
       "type": "string",
       "description": "City slug (see GET /v1/cities), e.g. istanbul, nyc, los-angeles"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "city": "istanbul",
  "unit": "C",
  "latest": {
   "new": {
    "unit": "C",
    "bucket": "29-30°C",
    "reading": 30.1
   },
   "old": {
    "unit": "C",
    "bucket": "28-29°C",
    "reading": 29.4
   },
   "seq": 41,
   "city": "istanbul",
   "buckets": [
    {
     "no": 0.45,
     "yes": 0.55,
     "label": "29-30°C"
    }
   ],
   "marketUrl": "https://polymarket.com/event/highest-temperature-in-istanbul-on-july-3-2026",
   "targetDate": "2026-07-03",
   "conditionId": "0x…"
  },
  "charged": true,
  "latestSeq": 41,
  "observedAt": "2026-07-03T13:22:00.000Z",
  "displayName": "Istanbul"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/isocast-weather-spot-signal-56d3f818/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.isocast.dev](https://www.zero.xyz/host/api.isocast.dev/llms.txt)