2s Aviation API
The aviation API from 2s — 4 operation(s) for aviation.
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OpenAPI Specification
openapi: 3.2.0
info:
title: 2s — the (most) everything Aviation API
version: '1'
summary: The (most) everything API.
description: 'The (most) everything API for AI agents: 575+ pay-per-call endpoints on one origin.'
contact:
name: 2s
url: https://2s.io
email: alley@2s.io
x-logo:
url: https://2s.io/icon-512.png
altText: 2s
x-guidance: 'Pay-per-call REST API for AI agents — hundreds of endpoints returning ground-truth data (US public records, company & legal identifiers, finance/SEC, crypto/web3, security & CVEs, medical codes, weather & geocoding, agriculture, energy, maritime, music, and more). Every endpoint is paid per call in USDC via x402 (Base or Solana) — no API key, no signup. Call any endpoint with no auth to get a 402 PaymentRequirements envelope, sign it (EIP-3009 on Base, partial SPL transfer on Solana), and retry with the PAYMENT-SIGNATURE header. Add ?trial=1 for one free real call per endpoint per hour to test before paying. To discover the right endpoint: GET https://2s.io/api/directory for the full catalog, or GET https://2s.io/api/search/endpoints?q=<natural-language task> for a ranked match. Per-call price is on each operation as x-payment-info (from $0.001). Batch up to 50 calls behind one payment via POST https://2s.io/api/batch/run.'
servers:
- url: https://2s.io
tags:
- name: aviation
paths:
/api/aviation/accidents:
get:
tags:
- aviation
summary: Search the NTSB civil aviation accident & incident database
description: 'Search the NTSB civil aviation accident & incident database (CAROL) — US events from 1962 to present plus selected foreign investigations. Filter by aircraft registration (N-number, partial match), US state (2-letter code or name), make, model, city, and/or event date range (dateFrom/dateTo as YYYY-MM-DD). At least one filter is required. Returns matching events newest-first: NTSB number, event date/type, city/state/country, aircraft registration(s)/make(s)/model(s), highest injury level, onboard & on-ground injury counts, report type/status, and a link to the official NTSB case page. Data: NTSB (U.S. public domain), live. For aviation safety research, fleet/tail-number history, incident due-diligence, and accident-trend analysis.'
operationId: aviation_accidents
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: OK
content:
application/json:
schema:
type: object
required:
- data
- meta
properties:
data:
type: object
properties:
query:
type: object
additionalProperties:
anyOf:
- not: {}
- anyOf:
- type: string
- type: number
total:
type: number
truncated:
type: boolean
count:
type: number
items:
type: array
items:
type: object
properties:
ntsbNumber:
type: string
nullable: true
mkey:
type: string
nullable: true
eventType:
type: string
nullable: true
eventDate:
type: string
nullable: true
city:
type: string
nullable: true
state:
type: string
nullable: true
country:
type: string
nullable: true
registration:
type: array
items:
type: string
make:
type: array
items:
type: string
model:
type: array
items:
type: string
highestInjuryLevel:
type: string
nullable: true
injuriesOnboard:
type: number
nullable: true
injuriesOnGround:
type: number
nullable: true
reportType:
type: string
nullable: true
reportStatus:
type: string
nullable: true
reportUrl:
type: string
nullable: true
required:
- ntsbNumber
- mkey
- eventType
- eventDate
- city
- state
- country
- registration
- make
- model
- highestInjuryLevel
- injuriesOnboard
- injuriesOnGround
- reportType
- reportStatus
- reportUrl
additionalProperties: false
source:
$ref: '#/components/schemas/Source'
required:
- query
- total
- truncated
- count
- items
- source
additionalProperties: false
meta:
$ref: '#/components/schemas/CallMeta'
'400':
$ref: '#/components/responses/BadRequest'
'402':
$ref: '#/components/responses/PaymentRequired'
'405':
$ref: '#/components/responses/MethodNotAllowed'
'500':
$ref: '#/components/responses/ServerError'
'502':
$ref: '#/components/responses/UpstreamError'
x-2s-id: aviation.accidents
x-2s-version: null
x-2s-price:
usd: 0.003
x-2s-accepts:
- x402
x-2s-response-shape: legacy
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.003000'
protocols:
- x402: {}
parameters:
- name: registration
in: query
required: false
description: Aircraft registration / N-number (partial match).
schema:
type: string
minLength: 1
maxLength: 20
- name: state
in: query
required: false
description: US state, 2-letter code or full name.
schema:
type: string
minLength: 2
maxLength: 40
- name: make
in: query
required: false
description: Aircraft make (partial match), e.g. Cessna.
schema:
type: string
minLength: 1
maxLength: 60
- name: model
in: query
required: false
description: Aircraft model (partial match), e.g. 172.
schema:
type: string
minLength: 1
maxLength: 60
- name: city
in: query
required: false
description: Event city (partial match).
schema:
type: string
minLength: 1
maxLength: 80
- name: dateFrom
in: query
required: false
description: Earliest event date, YYYY-MM-DD.
schema:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
- name: dateTo
in: query
required: false
description: Latest event date, YYYY-MM-DD.
schema:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
- name: limit
in: query
required: false
description: Max records to return (1-100, default 25).
schema:
type: integer
minimum: 1
maximum: 100
default: 25
- $ref: '#/components/parameters/TrialMode'
/api/aviation/metar:
get:
tags:
- aviation
summary: Current aviation weather observation (METAR) for one or
description: 'Current aviation weather observation (METAR) for one or more airports. Pass ids = comma-separated ICAO station ids (e.g. KATL, EGLL, KJFK). Returns the raw METAR plus decoded fields: flight category (VFR/MVFR/IFR/LIFR), temperature + dewpoint (°C), wind direction/speed/gust (kt), visibility, altimeter (inHg), and cloud layers. Source: NOAA Aviation Weather Center (keyless, public domain).'
operationId: aviation_metar
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = METAR observations (one per station); total = count.'
content:
application/json:
schema:
type: object
required:
- data
- meta
properties:
data:
type: object
properties:
ok:
type: boolean
enum:
- true
items:
type: array
items:
type: object
properties:
station:
type: string
observedAt:
type: string
nullable: true
raw:
type: string
nullable: true
flightCategory:
type: string
nullable: true
tempC:
type: number
nullable: true
dewpointC:
type: number
nullable: true
windDirDeg:
type: number
nullable: true
windSpeedKt:
type: number
nullable: true
windGustKt:
type: number
nullable: true
visibility:
type: string
nullable: true
altimeterInHg:
type: number
nullable: true
clouds:
type: array
items:
type: object
properties:
cover:
type: string
baseFtAgl:
type: number
nullable: true
required:
- cover
- baseFtAgl
additionalProperties: false
name:
type: string
nullable: true
required:
- station
- observedAt
- raw
- flightCategory
- tempC
- dewpointC
- windDirDeg
- windSpeedKt
- windGustKt
- visibility
- altimeterInHg
- clouds
- name
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
required:
- ok
- items
- total
- source
additionalProperties: false
meta:
$ref: '#/components/schemas/CallMeta'
'400':
$ref: '#/components/responses/BadRequest'
'402':
$ref: '#/components/responses/PaymentRequired'
'405':
$ref: '#/components/responses/MethodNotAllowed'
'500':
$ref: '#/components/responses/ServerError'
'502':
$ref: '#/components/responses/UpstreamError'
x-2s-id: aviation.metar
x-2s-version: null
x-2s-price:
usd: 0.003
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.003000'
protocols:
- x402: {}
parameters:
- name: ids
in: query
required: true
description: Comma-separated list of identifiers.
schema:
type: string
minLength: 3
maxLength: 120
- $ref: '#/components/parameters/TrialMode'
/api/aviation/sigmet:
get:
tags:
- aviation
summary: Active in-flight weather hazard advisories (SIGMETs and
description: Active in-flight weather hazard advisories (SIGMETs and AIRMETs) from the NOAA Aviation Weather Center. Returns current advisories over a lookback window (1-24h), optionally filtered by hazard (CONVECTIVE, TURB turbulence, ICE icing, IFR, MTN OBSCN mountain obscuration, ASH volcanic ash). Each advisory carries the issuing office, type (SIGMET/AIRMET/OUTLOOK), hazard, severity, valid-from/to times, affected altitude band (feet MSL), movement (direction/speed), and the raw text bulletin. Keyless, public-domain (NOAA). The active-hazard layer aviation agents need — distinct from aviation.metar (station conditions) and aviation.taf (forecasts). Not for navigation.
operationId: aviation_sigmet
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = active advisories (sliced to limit); total = match count.'
content:
application/json:
schema:
type: object
required:
- data
- meta
properties:
data:
type: object
properties:
ok:
type: boolean
enum:
- true
items:
type: array
items:
type: object
properties:
icaoId:
type: string
nullable: true
type:
type: string
nullable: true
hazard:
type: string
nullable: true
severity:
type: string
nullable: true
validFrom:
type: string
nullable: true
validTo:
type: string
nullable: true
altitudeLowFt:
type: number
nullable: true
altitudeHiFt:
type: number
nullable: true
movementDirDeg:
type: number
nullable: true
movementSpeedKt:
type: number
nullable: true
raw:
type: string
nullable: true
required:
- icaoId
- type
- hazard
- severity
- validFrom
- validTo
- altitudeLowFt
- altitudeHiFt
- movementDirDeg
- movementSpeedKt
- raw
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
required:
- ok
- items
- total
- source
additionalProperties: false
meta:
$ref: '#/components/schemas/CallMeta'
'400':
$ref: '#/components/responses/BadRequest'
'402':
$ref: '#/components/responses/PaymentRequired'
'405':
$ref: '#/components/responses/MethodNotAllowed'
'500':
$ref: '#/components/responses/ServerError'
'502':
$ref: '#/components/responses/UpstreamError'
x-2s-id: aviation.sigmet
x-2s-version: null
x-2s-price:
usd: 0.0027
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.002700'
protocols:
- x402: {}
parameters:
- name: hazard
in: query
required: false
description: Hazard.
schema:
type: string
minLength: 2
maxLength: 20
- name: hours
in: query
required: false
description: Look-back window, in hours.
schema:
type: integer
minimum: 1
maximum: 24
- name: limit
in: query
required: false
description: Maximum number of results to return.
schema:
type: integer
minimum: 1
maximum: 50
- $ref: '#/components/parameters/TrialMode'
/api/aviation/taf:
get:
tags:
- aviation
summary: Terminal Aerodrome Forecast (TAF) for one or more airports
description: 'Terminal Aerodrome Forecast (TAF) for one or more airports — the official aviation forecast issued for an airport (~24–30h ahead). Pass ids = comma-separated ICAO station ids (e.g. KATL). Returns the raw TAF text + issue time. Source: NOAA Aviation Weather Center (keyless). For current conditions use aviation.metar.'
operationId: aviation_taf
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = TAFs (one per station); total = count.'
content:
application/json:
schema:
type: object
required:
- data
- meta
properties:
data:
type: object
properties:
ok:
type: boolean
enum:
- true
items:
type: array
items:
type: object
properties:
station:
type: string
issuedAt:
type: string
nullable: true
raw:
type: string
nullable: true
name:
type: string
nullable: true
required:
- station
- issuedAt
- raw
- name
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
required:
- ok
- items
- total
- source
additionalProperties: false
meta:
$ref: '#/components/schemas/CallMeta'
'400':
$ref: '#/components/responses/BadRequest'
'402':
$ref: '#/components/responses/PaymentRequired'
'405':
$ref: '#/components/responses/MethodNotAllowed'
'500':
$ref: '#/components/responses/ServerError'
'502':
$ref: '#/components/responses/UpstreamError'
x-2s-id: aviation.taf
x-2s-version: null
x-2s-price:
usd: 0.003
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.003000'
protocols:
- x402: {}
parameters:
- name: ids
in: query
required: true
description: Comma-separated list of identifiers.
schema:
type: string
minLength: 3
maxLength: 120
- $ref: '#/components/parameters/TrialMode'
components:
schemas:
Source:
type: object
description: 'Provenance of the data: upstream provider, source URL, and license.'
properties:
provider:
type: string
description: Upstream data provider.
url:
type: string
description: Source URL or documentation link.
license:
type: string
description: License / usage terms for the data.
CallMeta:
type: object
description: Per-call meta envelope — endpoint id, cost, caller kind, settlement details.
X402PaymentRequiredV2:
type: object
description: x402 v2 PaymentRequired envelope. Pick any entry from accepts[], sign for that rail, retry with the PAYMENT-SIGNATURE header.
required:
- x402Version
- accepts
properties:
x402Version:
type: integer
const: 2
error:
type: string
description: Human-readable reason payment is required.
resource:
type: string
description: The resource URL being purchased.
accepts:
type: array
description: Payment requirement options, one per supported network (Base USDC, Solana USDC).
items:
type: object
required:
- scheme
- network
- amount
- asset
- payTo
- maxTimeoutSeconds
properties:
scheme:
type: string
enum:
- exact
network:
type: string
description: CAIP-2 network id, e.g. "eip155:8453" (Base) or "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp".
amount:
type: string
description: Price in atomic asset units (USDC has 6 decimals).
asset:
type: string
description: Asset contract address / mint.
payTo:
type: string
description: Treasury address to pay.
maxTimeoutSeconds:
type: integer
extra:
type: object
description: 'Rail-specific extras (EVM: EIP-712 domain name/version; Solana: feePayer).'
additionalProperties: true
extensions:
type: object
description: Optional discovery metadata (e.g. bazaar input/output schemas).
additionalProperties: true
responses:
PaymentRequired:
description: Payment required. Body contains the x402 PaymentRequirements envelope with a multi-network accepts array; the per-call price is in accepts[].amount (and on the operation as x-2s-price). Sign for whichever rail you hold USDC on (EIP-3009 for Base, partial SPL transfer for Solana) and retry with the PAYMENT-SIGNATURE header (X-PAYMENT also accepted for v1 clients).
content:
application/json:
schema:
$ref: '#/components/schemas/X402PaymentRequiredV2'
UpstreamError:
description: Upstream provider error.
MethodNotAllowed:
description: Method not allowed — see `Allow` header for the supported method.
ServerError:
description: Internal server error.
BadRequest:
description: Bad request — invalid parameters.
parameters:
TrialMode:
name: trial
in: query
required: false
description: 'Try before you buy. Set to 1 for one free real call per endpoint per hour — no wallet or payment needed — to verify the endpoint before paying. Equivalent to sending the "X-2s-Trial: 1" request header. Works on every endpoint.'
schema:
type: integer
enum:
- 1
securitySchemes:
x402Payment:
type: apiKey
in: header
name: PAYMENT-SIGNATURE
description: 'x402 protocol v2: base64-encoded PaymentPayload. Call any paid endpoint without auth to receive a 402 with a multi-network PaymentRequirements envelope. Sign for either rail: EIP-3009 transferWithAuthorization (Base USDC) OR a partial SPL token transfer (Solana USDC). Retry with PAYMENT-SIGNATURE header. X-PAYMENT is also accepted for v1 buyer clients. See https://x402.org.'