1gateway Weather API
The Weather API from 1gateway — 2 operation(s) for weather.
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OpenAPI Specification
openapi: 3.2.0
info:
title: 1gateway Weather API
version: 0.1.1
description: '1gateway lets AI agents buy the data and APIs they need, one call at a time: no signup, no API key, paid per request with USDC on Base or Solana via x402. Coverage: company and compliance checks (sanctions, KYB, SEC filings, Korean companies), Korean real estate, trade and macro data, onchain and market data, and agent utilities such as document-to-Markdown. Every response names its source. Failed calls are never charged.'
x-guidance: 'Use this API when an agent needs data as English JSON with pay-per-call access and no signup. Common tasks: Korea apartment sale transactions and district price summaries, Korean public holidays, Korea company KYB (company resolve, profile, NTS business status, DART filings, supplier check), Korean HWP/HWPX to Markdown, web page to Markdown (web read), and document extract (PDF, DOCX, HWP/HWPX or web page to structured JSON). Current coverage is South Korea: apartment sale prices (MOLIT), exports/imports and 10-day export flash (Korea Customs), Bank of Korea statistics (ECOS), weather forecast by lat/lon (KMA), holidays (KASI); more APIs and countries are coming. Base onchain reads: token risk, wallet balances, token info, transaction status. Also: document → Markdown conversion for web pages, PDF, DOCX and Korean HWP/HWPX (price by detected type, decided before payment). Every /v1 endpoint is paid: call it, receive HTTP 402 with PAYMENT-REQUIRED, pay with an x402 client (USDC on Base or Solana, same price) and retry. No charge on failure: settlement happens only on 2xx; 4xx/5xx are never charged. Agent guide: https://1gateway.dev/agents.md. Status: https://1gateway.dev/status. MCP (Streamable HTTP) is available at https://1gateway.dev/mcp: initialize and tools/list are free, tools/call is paid via x402 _meta.'
contact:
email: contact@1gateway.dev
servers:
- url: https://1gateway.dev
tags:
- name: Weather
paths:
/v1/weather/forecast:
get:
operationId: kr_weather_forecast
summary: Korea short-term weather forecast (KMA) by latitude/longitude
description: 'Use when you need the official weather forecast for a point in South Korea for the next ~3-5 days. Data: KMA (Korea Meteorological Administration) village forecast on a 5 km grid, issued 8 times a day. Input: lat, lon (WGS84 decimal; Korea only). Output: JSON hourly then 3-hourly temperature C, sky, precipitation type and probability %, rain and snow amounts, humidity %, wind; plus daily min/max. Example: ?lat=37.5665&lon=126.978'
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.004500'
protocols:
- x402: {}
x-x402:
price: $0.0045
scheme: exact
network: eip155:8453
networks:
- eip155:8453
- solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
asset: USDC
kind: single
source: 'KMA via data.go.kr #15084084'
parameters:
- name: lat
in: query
required: true
description: Latitude, WGS84 decimal degrees (KMA domain ≈ 32–44; outside → 400, not charged)
schema:
type: number
minimum: 32
maximum: 44
example: 37.5665
- name: lon
in: query
required: true
description: Longitude, WGS84 decimal degrees (KMA domain ≈ 123–133)
schema:
type: number
minimum: 123
maximum: 133
example: 126.978
responses:
'200':
description: OK (payment settled). Example is a trimmed real output.
content:
application/json:
schema:
type: object
properties:
location:
type: object
properties:
lat:
type: number
lon:
type: number
gridNx:
type: integer
gridNy:
type: integer
gridResolutionKm:
type: integer
issuedAt:
type: string
timezone:
type: string
attribution:
type: string
cache:
type: string
hourly:
type: array
items:
type: object
properties:
time:
type: string
temperatureC:
type: integer
sky:
type: string
precipitationType:
type: string
precipitationProbabilityPct:
type: integer
precipitation1h:
type: object
properties:
mm:
type:
- integer
- 'null'
category:
type: string
raw:
type: string
snowfall1h:
type: object
properties:
cm:
type: integer
category:
type: string
raw:
type: string
humidityPct:
type: integer
windSpeedMs:
type:
- number
- 'null'
windCategory:
type:
- string
- 'null'
windDirectionDeg:
type: integer
windEastwardMs:
type: number
windNorthwardMs:
type: number
waveHeightM:
type: integer
resolution:
type: string
daily:
type: array
items:
type: object
properties:
date:
type: string
minTempC:
type:
- integer
- 'null'
maxTempC:
type:
- integer
- 'null'
maxPopPct:
type: integer
required:
- location
- issuedAt
- timezone
- attribution
- cache
- hourly
- daily
example:
location:
lat: 37.5665
lon: 126.978
gridNx: 60
gridNy: 127
gridResolutionKm: 5
issuedAt: '2026-10-09T14:00:00+09:00'
timezone: Asia/Seoul
attribution: 'Source: Korea Meteorological Administration (기상청) Short-term Forecast via data.go.kr (dataset 15084084, KOGL Type 1 — attribution required). Normalized/transla…'
cache: miss
hourly:
- time: '2026-10-09T15:00:00+09:00'
temperatureC: 25
sky: mostly_cloudy
precipitationType: none
precipitationProbabilityPct: 20
precipitation1h:
mm: 0
category: none
raw: 강수없음
snowfall1h:
cm: 0
category: none
raw: 적설없음
humidityPct: 35
windSpeedMs: 0.4
windCategory: null
windDirectionDeg: 297
windEastwardMs: 0.3
windNorthwardMs: -0.1
waveHeightM: 0
resolution: 1h
daily:
- date: '2026-10-09'
minTempC: null
maxTempC: null
maxPopPct: 20
'400':
description: Invalid or missing parameters, or URL/domain not allowed (validated before payment where possible; not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'402':
description: Payment Required (x402 v2). Returned for every unpaid request. PAYMENT-REQUIRED response header carries base64 JSON PaymentRequired; retry with PAYMENT-SIGNATURE.
'500':
description: Unexpected server error (not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'502':
description: Upstream source returned an error or an unreadable response (not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'503':
description: Endpoint temporarily disabled or upstream not configured on this server; no 402 is issued (not charged). Check /status, retry later
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'504':
description: Upstream source timed out or was unreachable (not charged). Retry after 1-5 min with backoff
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
tags:
- Weather
/v1/weather/global:
get:
operationId: weather_global
summary: 'Worldwide weather forecast: current, hourly (72 h) and 10-day daily for any…'
description: 'Use when an agent needs the weather anywhere in the world. Input: lat, lon, optional hours (0-72 hourly steps, default 24), tz (IANA zone for daily summaries, default UTC). Output: JSON current temperature, symbol, wind, humidity, cloud, pressure; hourly series; daily min/max, precipitation, max wind, symbol for ~10 days. Data: MET Norway. Example: ?lat=51.5072&lon=-0.1276&tz=Europe/London'
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.002000'
protocols:
- x402: {}
x-x402:
price: $0.002
scheme: exact
network: eip155:8453
networks:
- eip155:8453
- solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
asset: USDC
kind: aggregate
source: MET Norway Locationforecast 2.0 (CC BY 4.0), cached 30 min per ~1 km cell
parameters:
- name: lat
in: query
required: true
description: Latitude, WGS84 decimal degrees (rounded to 0.01)
schema:
type: number
minimum: -90
maximum: 90
example: 51.5072
- name: lon
in: query
required: true
description: Longitude, WGS84 decimal degrees (rounded to 0.01)
schema:
type: number
minimum: -180
maximum: 180
example: -0.1276
- name: hours
in: query
required: false
description: Hourly steps to return (default 24)
schema:
type: integer
minimum: 0
maximum: 72
example: 24
- name: tz
in: query
required: false
description: IANA time zone for daily summaries and local hours (default UTC)
schema:
type: string
maxLength: 64
example: Europe/London
responses:
'200':
description: OK (payment settled). Example is a trimmed real output.
content:
application/json:
schema:
type: object
properties:
location:
type: object
properties:
lat:
type: number
lon:
type: number
elevationM:
type:
- integer
- 'null'
timezone:
type: string
updatedAt:
type:
- string
- 'null'
current:
type: object
properties:
time:
type: string
temperatureC:
type: number
symbol:
type:
- string
- 'null'
precipitationNextHourMm:
type:
- number
- 'null'
windMs:
type: number
windFromDeg:
type: integer
humidityPct:
type: number
cloudPct:
type: number
pressureHpa:
type: number
hourly:
type: array
items:
type: object
properties:
time:
type: string
localHour:
type: integer
temperatureC:
type: number
precipitationMm:
type: number
symbol:
type:
- string
- 'null'
windMs:
type: number
windFromDeg:
type: integer
humidityPct:
type: number
cloudPct:
type: number
daily:
type: array
items:
type: object
properties:
date:
type: string
minC:
type: number
maxC:
type: number
precipitationMm:
type: number
maxWindMs:
type: number
symbol:
type:
- string
- 'null'
units:
type: object
properties:
temperature:
type: string
precipitation:
type: string
wind:
type: string
pressure:
type: string
attribution:
type: string
note:
type: string
required:
- location
- updatedAt
- current
- hourly
- daily
- units
- attribution
- note
example:
location:
lat: 51.51
lon: -0.13
elevationM: 17
timezone: Europe/London
updatedAt: '2026-10-18T13:17:51Z'
current:
time: '2026-10-18T15:00:00Z'
temperatureC: 13.1
symbol: partlycloudy_day
precipitationNextHourMm: 0
windMs: 5.2
windFromDeg: 19
humidityPct: 52.1
cloudPct: 80.5
pressureHpa: 1027.7
hourly:
- time: '2026-10-18T15:00:00Z'
localHour: 16
temperatureC: 13.1
precipitationMm: 0
symbol: partlycloudy_day
windMs: 5.2
windFromDeg: 19
humidityPct: 52.1
cloudPct: 80.5
daily:
- date: '2026-10-18'
minC: 9.1
maxC: 13.1
precipitationMm: 1
maxWindMs: 5.2
symbol: rainshowers_night
units:
temperature: °C
precipitation: mm
wind: m/s
pressure: hPa
attribution: Weather forecast data from MET Norway (The Norwegian Meteorological Institute), CC BY 4.0.
note: Coordinates rounded to 0.01° (~1 km). Symbols are MET Norway weather symbol codes (e.g. clearsky_day, lightrain). Daily values use the requested time zone; the…
'400':
description: Invalid or missing parameters, or URL/domain not allowed (validated before payment where possible; not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'402':
description: Payment Required (x402 v2). Returned for every unpaid request. PAYMENT-REQUIRED response header carries base64 JSON PaymentRequired; retry with PAYMENT-SIGNATURE.
'500':
description: Unexpected server error (not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'502':
description: Upstream source returned an error or an unreadable response (not charged)
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'503':
description: Endpoint temporarily disabled or upstream not configured on this server; no 402 is issued (not charged). Check /status, retry later
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
'504':
description: Upstream source timed out or was unreachable (not charged). Retry after 1-5 min with backoff
content:
application/json:
schema:
type: object
properties:
error:
type: string
description: Machine-readable error code, e.g. bad_request, not_found, upstream_error, upstream_unreachable, upstream_not_configured
examples:
- bad_request
message:
type: string
description: Human-readable explanation
examples:
- month must be YYYYMM (e.g. 202409)
required:
- error
tags:
- Weather
x-x402-network: eip155:8453
x-billing-policy: 'No charge on failure: payment is settled only after the endpoint returns a 2xx response. Any 4xx or 5xx (bad input, no data, upstream error, timeout, disabled endpoint) is not settled, so the signed payment is never collected. Input is validated before the 402 wherever possible. Over MCP, a tool result with isError is not settled either.'
x-error-codes:
- status: 400
codes:
- bad_request
- url_not_allowed
- bad_checksum
- not_a_contract
meaning: Invalid or missing parameters, or a URL/domain that is not allowed.
retry: Fix the input; do not retry as is.
- status: 402
codes: []
meaning: Payment required (x402 v2). The PAYMENT-REQUIRED header holds the exact price.
retry: Pay with an x402 client and retry with PAYMENT-SIGNATURE.
- status: 403
codes:
- not_bok_authored
meaning: Requested table/resource is not served (e.g. statistics not authored by the Bank of Korea).
retry: Do not retry.
- status: 404
codes:
- not_found
- tx_not_found
- tx_not_mined
meaning: No data for the requested period/code yet.
retry: Try an earlier period or another code.
- status: 413
codes:
- too_large
meaning: Document is larger than this server's conversion cap (checked before payment).
retry: Send a smaller document.
- status: 415
codes:
- unsupported_type
- type_mismatch
meaning: Document type not supported or not matching the declared type (before payment).
retry: Do not retry as is.
- status: 502
codes:
- upstream_error
- upstream_bad_response
- upstream_http_error
- rpc_unavailable
- source_http_error
meaning: The upstream source (government API, RPC, target site) returned an error or unreadable data.
retry: Retry after 30-60 s with backoff.
- status: 503
codes:
- endpoint_disabled
- upstream_not_configured
- payment_not_configured
meaning: Endpoint temporarily disabled on this server, or its upstream is not configured. No 402 is issued.
retry: Check /status; retry later.
- status: 504
codes:
- upstream_unreachable
meaning: The upstream source timed out or was unreachable (Korean public data APIs have occasional outages, esp. holidays).
retry: Retry after 1-5 min with backoff.