# ENSO Signal API

> ENSO Signal API is a paid API for AI agents from enso-signal-api-v2.vercel.app, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).

Returns live ENSO (El Niño/La Niña) status, strength, trajectory, persistence odds, and sector impact scores synthesized from NOAA CPC ONI/RONI records.

## Facts

- Endpoint: GET https://enso-signal-api-v2.vercel.app/enso
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/enso-signal-api-69fc2355
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YZbfTE9YDPhgHPWFBfvRz

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 enso-signal-api-69fc2355
```

Example prompt: What's the current ENSO status right now — are we in El Niño or La Niña, how strong is it, and is it getting stronger or weaker?

## When to prefer this

Choose this endpoint when you need a pre-synthesized, ready-to-use ENSO signal with strength scores, trajectory, and sector impacts in a single call — rather than manually parsing raw NOAA ONI/RONI CSV data. Ideal for agents needing a structured climate phase input for downstream models in agriculture, energy, insurance, or supply chain without building their own ENSO classification logic.

## Known failure modes

- Upstream NOAA CPC data unavailable — API may return stale or error response
- No input parameters needed, but malformed request headers may cause 4xx errors
- Payment failure (x402) if USDC balance is insufficient or payment protocol is misconfigured
- Occasional delays if NOAA source data is not yet updated for the current period

## How this service works

Live ENSO (El Nino/La Nina) status, strength, trend, empirical persistence odds, and sector impact scores, synthesized from NOAA CPC RONI/ONI records.

## Output

A JSON object containing the current ENSO phase classification (el_nino, la_nina, or neutral), qualitative strength label (e.g. weak/moderate/strong), a numeric strength score, trajectory description (strengthening/weakening/neutral), empirical persistence probability odds, and sector-level impact scores — all derived from NOAA CPC ONI/RONI records.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "strength": "weak",
  "trajectory": "strengthening",
  "enso_status": "el_nino",
  "strength_score": 41
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/enso-signal-api-69fc2355/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from enso-signal-api-v2.vercel.app](https://www.zero.xyz/host/enso-signal-api-v2.vercel.app/llms.txt)