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OpenAPI Specification
openapi: 3.2.0
info:
title: 2s — the (most) everything Flight 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: flight
paths:
/api/flight/airport-board:
get:
tags:
- flight
summary: Live airport activity board
description: Live airport activity board. For an airport (ICAO like KSFO or IATA like SFO), returns recent/upcoming departures or arrivals — flight ident, registration, aircraft type, origin/destination airports, status, scheduled/estimated/actual gate times, gate and terminal. Choose the board with type. Real-time operational data for an airport; complements flight.status (single flight) and flight.route-schedule.
operationId: flight_airport-board
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized: items = board entries.'
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:
ident:
type: string
nullable: true
identIata:
type: string
nullable: true
registration:
type: string
nullable: true
aircraftType:
type: string
nullable: true
origin:
type: object
properties:
icao:
type: string
nullable: true
iata:
type: string
nullable: true
name:
type: string
nullable: true
city:
type: string
nullable: true
timezone:
type: string
nullable: true
required:
- icao
- iata
- name
- city
- timezone
additionalProperties: false
nullable: true
destination:
type: object
properties:
icao:
type: string
nullable: true
iata:
type: string
nullable: true
name:
type: string
nullable: true
city:
type: string
nullable: true
timezone:
type: string
nullable: true
required:
- icao
- iata
- name
- city
- timezone
additionalProperties: false
nullable: true
status:
type: string
nullable: true
scheduledOut:
type: string
nullable: true
estimatedOut:
type: string
nullable: true
actualOut:
type: string
nullable: true
scheduledIn:
type: string
nullable: true
estimatedIn:
type: string
nullable: true
actualIn:
type: string
nullable: true
gateOrigin:
type: string
nullable: true
gateDestination:
type: string
nullable: true
terminalOrigin:
type: string
nullable: true
terminalDestination:
type: string
nullable: true
required:
- ident
- identIata
- registration
- aircraftType
- origin
- destination
- status
- scheduledOut
- estimatedOut
- actualOut
- scheduledIn
- estimatedIn
- actualIn
- gateOrigin
- gateDestination
- terminalOrigin
- terminalDestination
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
meta:
type: object
properties:
airport:
type: string
type:
type: string
required:
- airport
- type
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':
$ref: '#/components/responses/UpstreamError'
x-2s-id: flight.airport-board
x-2s-version: null
x-2s-price:
usd: 0.045
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.045000'
protocols:
- x402: {}
parameters:
- name: airport
in: query
required: true
description: Airport code, ICAO (KSFO) or IATA (SFO).
schema:
type: string
minLength: 3
maxLength: 4
pattern: ^[A-Za-z0-9]+$
- name: type
in: query
required: false
description: Default departures.
schema:
type: string
enum:
- departures
- arrivals
- scheduled_departures
- scheduled_arrivals
- name: limit
in: query
required: false
description: Maximum number of results to return.
schema:
type: integer
minimum: 1
maximum: 30
default: 15
- $ref: '#/components/parameters/TrialMode'
/api/flight/route-schedule:
get:
tags:
- flight
summary: Scheduled flights between two airports over a date window
description: Scheduled flights between two airports over a date window. Pass origin and destination (ICAO or IATA) plus startDate/endDate; returns scheduled flights with ident, operator, aircraft type, origin/destination, and scheduled departure/arrival times. Answers 'what flights run SFO→JFK this week'. Complements flight.status and flight.airport-board.
operationId: flight_route-schedule
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized: items = scheduled flights for the route.'
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:
ident:
type: string
nullable: true
identIata:
type: string
nullable: true
operator:
type: string
nullable: true
aircraftType:
type: string
nullable: true
origin:
type: string
nullable: true
originIata:
type: string
nullable: true
destination:
type: string
nullable: true
destinationIata:
type: string
nullable: true
scheduledOut:
type: string
nullable: true
scheduledIn:
type: string
nullable: true
required:
- ident
- identIata
- operator
- aircraftType
- origin
- originIata
- destination
- destinationIata
- scheduledOut
- scheduledIn
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
meta:
type: object
properties:
origin:
type: string
destination:
type: string
required:
- origin
- destination
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':
$ref: '#/components/responses/UpstreamError'
x-2s-id: flight.route-schedule
x-2s-version: null
x-2s-price:
usd: 0.045
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.045000'
protocols:
- x402: {}
parameters:
- name: origin
in: query
required: true
description: Origin airport, ICAO or IATA.
schema:
type: string
minLength: 3
maxLength: 4
pattern: ^[A-Za-z0-9]+$
- name: destination
in: query
required: true
description: Destination airport, ICAO or IATA.
schema:
type: string
minLength: 3
maxLength: 4
pattern: ^[A-Za-z0-9]+$
- name: startDate
in: query
required: true
description: Window start (YYYY-MM-DD).
schema:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
- name: endDate
in: query
required: true
description: Window end (YYYY-MM-DD), <= 7 days after start.
schema:
type: string
pattern: ^\d{4}-\d{2}-\d{2}$
- name: limit
in: query
required: false
description: Maximum number of results to return.
schema:
type: integer
minimum: 1
maximum: 30
default: 15
- $ref: '#/components/parameters/TrialMode'
/api/flight/status:
get:
tags:
- flight
summary: Live flight status and tracking
description: Live flight status and tracking. Pass ident as an airline flight designator (ICAO "UAL1" or IATA "UA1") or an aircraft tail number; returns recent and upcoming instances of that flight with origin/destination airports (ICAO/IATA/name/city/timezone), status, cancellation/diversion flags, scheduled vs estimated vs actual gate and runway times (out/off/on/in), departure and arrival delays, en-route progress percent, aircraft type and registration, and route distance. limit controls how many instances return (default 5, newest first by scheduled departure). Real-time operational data — answer "where is this flight, is it delayed, when does it land" with live values. For aircraft registry data see /api/aircraft/lookup; for airport metadata see /api/airport/lookup.
operationId: flight_status
deprecated: false
security:
- x402Payment: []
responses:
'200':
description: 'Normalized envelope: items = recent + upcoming instances of a flight with live times, delays, progress, aircraft; total = instances returned; meta.ident echoes the queried designator.'
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:
ident:
type: string
identIata:
type: string
nullable: true
operator:
type: string
nullable: true
flightNumber:
type: string
nullable: true
registration:
type: string
nullable: true
aircraftType:
type: string
nullable: true
origin:
type: object
properties:
icao:
type: string
nullable: true
iata:
type: string
nullable: true
name:
type: string
nullable: true
city:
type: string
nullable: true
timezone:
type: string
nullable: true
required:
- icao
- iata
- name
- city
- timezone
additionalProperties: false
nullable: true
destination:
type: object
properties:
icao:
type: string
nullable: true
iata:
type: string
nullable: true
name:
type: string
nullable: true
city:
type: string
nullable: true
timezone:
type: string
nullable: true
required:
- icao
- iata
- name
- city
- timezone
additionalProperties: false
nullable: true
status:
type: string
nullable: true
cancelled:
type: boolean
diverted:
type: boolean
scheduledOut:
type: string
nullable: true
estimatedOut:
type: string
nullable: true
actualOut:
type: string
nullable: true
actualOff:
type: string
nullable: true
description: Actual takeoff time.
actualOn:
type: string
nullable: true
description: Actual landing time.
scheduledIn:
type: string
nullable: true
estimatedIn:
type: string
nullable: true
actualIn:
type: string
nullable: true
progressPercent:
type: number
nullable: true
departureDelaySec:
type: number
nullable: true
arrivalDelaySec:
type: number
nullable: true
description: Negative = early.
routeDistanceKm:
type: number
nullable: true
required:
- ident
- identIata
- operator
- flightNumber
- registration
- aircraftType
- origin
- destination
- status
- cancelled
- diverted
- scheduledOut
- estimatedOut
- actualOut
- actualOff
- actualOn
- scheduledIn
- estimatedIn
- actualIn
- progressPercent
- departureDelaySec
- arrivalDelaySec
- routeDistanceKm
additionalProperties: false
total:
type: integer
nullable: true
description: Total matching rows upstream; null when unknown.
source:
$ref: '#/components/schemas/Source'
meta:
type: object
properties:
ident:
type: string
description: Normalized (uppercased) ident that was queried.
required:
- ident
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':
$ref: '#/components/responses/UpstreamError'
x-2s-id: flight.status
x-2s-version: null
x-2s-price:
usd: 0.045
x-2s-accepts:
- x402
x-2s-response-shape: normalized
x-payment-info:
price:
mode: fixed
currency: USD
amount: '0.045000'
protocols:
- x402: {}
parameters:
- name: ident
in: query
required: true
description: Flight designator (ICAO UAL1 or IATA UA1) or aircraft tail number.
schema:
type: string
minLength: 2
maxLength: 12
pattern: ^[A-Za-z0-9-]+$
- name: identType
in: query
required: false
description: Ident type.
schema:
type: string
enum:
- designator
- registration
- fa_flight_id
- name: limit
in: query
required: false
description: Maximum number of results to return.
schema:
type: integer
minimum: 1
maximum: 15
default: 5
- $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.'