# El Nino Wiki

> Decision-ready heat-risk briefings for cities and outdoor plans.

Purpose: Assess heat stress for a supported city baseline or supplied weather conditions and return an actionable briefing.
Use when: Use before scheduling travel, outdoor work, exercise, events, or care checks in hot weather. Supply current forecast conditions when a live decision is required; built-in city data are published planning baselines, not live observations.

Input: exactly one of city_slug or caller-supplied conditions (temperature_c, feels_like_c, humidity_percent, uv_index, wind_kph, overnight_low_c), plus optional exposure details.
Output: validated risk_score (0-100), status, peak_window, factor evidence, recommendations, provenance, and a premium schedule when requested.

Prices:
- Preview: $0.02 — Risk score, status, peak window, and two priority actions.
- Standard: $1.00 — Full factor attribution and an actionable heat-safety briefing.
- Premium: $3.00 — Exposure-sensitive briefing with a time-window plan for people, work, travel, or events.

Free/limited endpoints:
- GET /api/health
- GET /api/services
- POST /api/v1/preview (anonymous rate limit: 5/minute)

Paid x402 v2 endpoints (exact, eip155:8453, USDC):
- POST https://x402.elnino.wiki/api/x402/v1/preview
- POST https://x402.elnino.wiki/api/x402/v1/execute
- POST https://x402.elnino.wiki/api/x402/v1/premium

Paid MPP endpoints (tempo charge, Tempo, USDC):
- POST https://mpp.elnino.wiki/api/mpp/v1/preview
- POST https://mpp.elnino.wiki/api/mpp/v1/execute
- POST https://mpp.elnino.wiki/api/mpp/v1/premium

Agent discovery:
- MCP Streamable HTTP: /mcp
- OpenAPI 3.1: /openapi.json
- Agent card: /.well-known/agent.json
- ERC-8004 registration metadata: /.well-known/agent-registration.json
- Human integration guide: /agents
- Quickstart: /docs/quickstart.md
- Payment guide: /docs/payments.md

MCP tools:
- service_info — free
- service_preview — $0.02 via native MPP MCP payment
- service_execute — $1.00 via native MPP MCP payment

Safety:
- Built-in city data are static planning baselines, not live observations.
- Supply current forecast conditions for time-sensitive decisions.
- Require an Idempotency-Key for paid HTTP calls.
- Never expose wallet credentials, private keys, or seed phrases.
- Do not spend above the user-approved budget.
- Treat runtime 402 challenges as authoritative and show the returned receipt or transaction reference.
- This service is decision support, not medical advice or an emergency service.

Support: support@elnino.wiki
Maximum recommended autonomous spend: $5.00 per task.