2s Airport API
The airport API from 2s — 2 operation(s) for airport.
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OpenAPI Specification
openapi: 3.2.0
info:
title: 2s — the (most) everything Airport 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: airport
paths:
/api/airport/lookup:
get:
tags:
- airport
summary: Look up an airport by 3-letter IATA (e.g
description: 'Look up an airport by 3-letter IATA (e.g. SFO) or 4-letter ICAO (e.g. KSFO) code. Query: code (3-5 chars, alphanumeric). Returns { airport: { id, ident, type, name, latitude, longitude, elevationFt, continent, isoCountry, isoRegion, municipality, scheduledService, icaoCode, iataCode, gpsCode, localCode, wikipediaLink } } or 404 NOT_FOUND.'
operationId: airport_lookup
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = [airport] (one OurAirports record); total = 1. 404 if no airport matches the code.'
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:
id:
type: integer
description: OurAirports stable numeric id.
ident:
type: string
description: Globally unique identifier (usually ICAO).
type:
type: string
nullable: true
description: large_airport | medium_airport | small_airport | heliport | seaplane_base | closed.
name:
type: string
nullable: true
latitude:
type: number
longitude:
type: number
elevationFt:
type: integer
nullable: true
continent:
type: string
nullable: true
isoCountry:
type: string
nullable: true
description: ISO 3166-1 alpha-2 country code.
isoRegion:
type: string
nullable: true
description: ISO 3166-2 region code (e.g. US-CA).
municipality:
type: string
nullable: true
scheduledService:
type: boolean
nullable: true
icaoCode:
type: string
nullable: true
iataCode:
type: string
nullable: true
gpsCode:
type: string
nullable: true
localCode:
type: string
nullable: true
wikipediaLink:
type: string
nullable: true
required:
- id
- ident
- type
- name
- latitude
- longitude
- elevationFt
- continent
- isoCountry
- isoRegion
- municipality
- scheduledService
- icaoCode
- iataCode
- gpsCode
- localCode
- wikipediaLink
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: airport.lookup
x-2s-version: null
x-2s-price:
usd: 0.0025
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.002500'
protocols:
- x402: {}
parameters:
- name: code
in: query
required: true
description: 3-letter IATA or 4-letter ICAO airport code (e.g. SFO, KSFO).
schema:
type: string
minLength: 3
maxLength: 5
- $ref: '#/components/parameters/TrialMode'
/api/airport/near:
get:
tags:
- airport
summary: Airports within a radius of a coordinate, sorted by distance
description: 'Airports within a radius of a coordinate, sorted by distance. Query: lat (-90..90), lon (-180..180), radius_km (1-2000, default 200), limit (1-100, default 20), type (optional: large_airport|medium_airport|small_airport|heliport|seaplane_base|balloonport|closed), country (optional 2-letter ISO 3166-1), scheduled_service (optional bool, true = commercial-service airports only). Returns { query, count, airports: [{ id, ident, name, iataCode, icaoCode, type, latitude, longitude, distanceKm, ... }] }.'
operationId: airport_near
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = airports within radius_km, sorted by ascending distance; total = null (no upstream total; query-bounded set); meta.query echoes the search.'
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:
id:
type: integer
ident:
type: string
name:
type: string
nullable: true
iataCode:
type: string
nullable: true
icaoCode:
type: string
nullable: true
type:
type: string
nullable: true
latitude:
type: number
longitude:
type: number
distanceKm:
type: number
description: Great-circle distance to (lat, lon), kilometers.
isoCountry:
type: string
nullable: true
isoRegion:
type: string
nullable: true
municipality:
type: string
nullable: true
scheduledService:
type: boolean
nullable: true
required:
- id
- ident
- name
- iataCode
- icaoCode
- type
- latitude
- longitude
- distanceKm
- isoCountry
- isoRegion
- municipality
- scheduledService
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
meta:
type: object
properties:
query:
type: object
properties:
latitude:
type: number
longitude:
type: number
radiusKm:
type: number
limit:
type: integer
type:
type: string
nullable: true
country:
type: string
nullable: true
scheduledServiceOnly:
type: boolean
nullable: true
required:
- latitude
- longitude
- radiusKm
- limit
- type
- country
- scheduledServiceOnly
additionalProperties: false
required:
- query
additionalProperties: false
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':
$ref: '#/components/responses/UpstreamError'
x-2s-id: airport.near
x-2s-version: null
x-2s-price:
usd: 0.0025
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.002500'
protocols:
- x402: {}
parameters:
- name: lat
in: query
required: true
description: Latitude in decimal degrees (-90 to 90).
schema:
type: number
minimum: -90
maximum: 90
- name: lon
in: query
required: true
description: Longitude in decimal degrees (-180 to 180).
schema:
type: number
minimum: -180
maximum: 180
- name: radius_km
in: query
required: false
description: Search radius in kilometers (1-2000). Default 200.
schema:
type: number
minimum: 1
maximum: 2000
default: 200
- name: limit
in: query
required: false
description: Max airports to return (1-100). Default 20.
schema:
type: integer
minimum: 1
maximum: 100
default: 20
- name: type
in: query
required: false
description: Filter by airport type.
schema:
type: string
enum:
- large_airport
- medium_airport
- small_airport
- heliport
- seaplane_base
- balloonport
- closed
- name: country
in: query
required: false
description: Filter by ISO 3166-1 alpha-2 country code (e.g. US).
schema:
type: string
pattern: ^[A-Z]{2}$
- name: scheduled_service
in: query
required: false
description: When true, only commercial-service airports.
schema:
type: boolean
- $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.'