generated: '2026-09-19'
method: derived
source: openapi/2s-io-openapi.json (live https://2s.io/openapi.json, 2026-09-19) and https://2s.io/llms.txt
spec_type: webhook-catalog
asyncapi_published: false
docs:
- https://2s.io/watchers
- https://2s.io/llms.txt#watchers--get-a-callback-dont-poll
- https://2s.io/.well-known/2s-attestation.json
summary: '2s publishes no AsyncAPI document (no /asyncapi.yaml or .json, nothing in the GitHub org), so none is
  saved and none is fabricated. It does publish a real outbound-callback surface in its OpenAPI and llms.txt: 26
  watcher kinds (arm once, get an EIP-191-signed HTTP POST when the world changes), a time-driven schedule primitive,
  and a consent-gated pub/sub with fan-out to subscriber URLs. This file captures that catalog verbatim from the
  contract so the event surface is scored; it is a webhook catalog, not an AsyncAPI.'
delivery:
  transport: HTTPS POST to a caller-supplied callbackUrl (any http(s) URL)
  signing: EIP-191 personal_sign by the provider's published key — "verify offline"; header X-2s-Signature (named
    in pubsub_subscribe)
  retries: exponential backoff; a pub/sub subscriber that repeatedly fails delivery is auto-disabled
  pull_backstop: watchers_status returns recent deliveries (HTTP result, attempt count) and any UNDELIVERED events
    with full bodies; schedule_status likewise
  payload: caller-supplied payload JSON echoed verbatim in every callback (+ scheduleId, fireNumber, firedAt on
    schedules)
  confirmation: 'pub/sub only — a one-time challenge POST carrying X-2s-Confirmation-Token and {type: "2s_subscription_confirmation",
    token}; the endpoint must reply 2xx with that token before it receives messages'
  schema_published: false
  note: The callback BODY schema is not declared anywhere in the contract — only that it carries the echoed payload
    and is signed. An AsyncAPI would be the natural place for it and does not exist.
pricing:
  watcher: $0.125 flat per arm; default 30-day / 25-fire window, max 90 days / 1,000 fires; cancel refunds nothing
  schedule: $0.125 per create; default+max 90 days; maxFires default 25, max 1000
  pubsub: $0.005 per subscribe/publish/create-topic call
  management: watchers_cancel $0.0025; watchers_status read-priced
channels:
  watchers:
    count: 25
    manage:
    - watchers_status (GET, pull backstop)
    - watchers_cancel (POST, idempotent)
    events:
    - id: watchers.business-earnings
      operationId: watchers_business-earnings
      path: /api/watchers/business-earnings
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback around a US company''s earnings.'
      trigger: 'WATCHER: get a signed callback around a US company''s earnings'
      arm_fields:
      - ticker
      - trigger
      - daysBefore
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - ticker
      - callbackUrl
    - id: watchers.company-news
      operationId: watchers_company-news
      path: /api/watchers/company-news
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a new news article is...'
      trigger: 'WATCHER: get a signed callback when a new news article is published about a US company'
      arm_fields:
      - ticker
      - keyword
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - ticker
      - callbackUrl
    - id: watchers.crypto-address-activity
      operationId: watchers_crypto-address-activity
      path: /api/watchers/crypto-address-activity
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback the moment a crypto address...'
      trigger: 'WATCHER: get a signed callback the moment a crypto address transacts'
      arm_fields:
      - chain
      - address
      - callbackUrl
      - direction
      - assetTypes
      - minValueUsd
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - chain
      - address
      - callbackUrl
    - id: watchers.dns
      operationId: watchers_dns
      path: /api/watchers/dns
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a host''s DNS records...'
      trigger: 'WATCHER: get a signed callback when a host''s DNS records change'
      arm_fields:
      - host
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - host
      - callbackUrl
    - id: watchers.earthquake
      operationId: watchers_earthquake
      path: /api/watchers/earthquake
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when USGS reports a new...'
      trigger: 'WATCHER: get a signed callback when USGS reports a new earthquake near a location above a magnitude'
      arm_fields:
      - lat
      - lon
      - radiusKm
      - minMagnitude
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - lat
      - lon
      - callbackUrl
    - id: watchers.fear-greed
      operationId: watchers_fear-greed
      path: /api/watchers/fear-greed
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when the Crypto Fear & Greed...'
      trigger: 'WATCHER: get a signed callback when the Crypto Fear & Greed index crosses a level (e.g'
      arm_fields:
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.federal-register
      operationId: watchers_federal-register
      path: /api/watchers/federal-register
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a new US Federal...'
      trigger: 'WATCHER: get a signed callback when a new US Federal Register document is published'
      arm_fields:
      - type
      - agency
      - keyword
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - callbackUrl
    - id: watchers.flight-status
      operationId: watchers_flight-status
      path: /api/watchers/flight-status
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a flight''s status...'
      trigger: 'WATCHER: get a signed callback when a flight''s status changes (e.g'
      arm_fields:
      - ident
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - ident
      - callbackUrl
    - id: watchers.fred-series
      operationId: watchers_fred-series
      path: /api/watchers/fred-series
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a FRED economic series''...'
      trigger: 'WATCHER: get a signed callback when a FRED economic series'' latest value crosses a level'
      arm_fields:
      - seriesId
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - seriesId
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.funding-rate
      operationId: watchers_funding-rate
      path: /api/watchers/funding-rate
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a Hyperliquid...'
      trigger: 'WATCHER: get a signed callback when a Hyperliquid perpetual''s hourly funding rate crosses a level
        (e.g'
      arm_fields:
      - coin
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - coin
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.fx-rate
      operationId: watchers_fx-rate
      path: /api/watchers/fx-rate
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when an FX pair crosses a...'
      trigger: 'WATCHER: get a signed callback when an FX pair crosses a rate you set'
      arm_fields:
      - base
      - quote
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - base
      - quote
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.gas-price
      operationId: watchers_gas-price
      path: /api/watchers/gas-price
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when EVM gas crosses a level...'
      trigger: 'WATCHER: get a signed callback when EVM gas crosses a level you set — e.g'
      arm_fields:
      - chain
      - conditionType
      - threshold
      - tier
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - chain
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.http-headers
      operationId: watchers_http-headers
      path: /api/watchers/http-headers
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a website''s HTTP...'
      trigger: 'WATCHER: get a signed callback when a website''s HTTP security-headers grade changes (e.g'
      arm_fields:
      - url
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - url
      - callbackUrl
    - id: watchers.ioc-reputation
      operationId: watchers_ioc-reputation
      path: /api/watchers/ioc-reputation
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when an indicator of...'
      trigger: 'WATCHER: get a signed callback when an indicator of compromise (IP or domain) changes malicious
        status across threat feeds'
      arm_fields:
      - ioc
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - ioc
      - callbackUrl
    - id: watchers.ipo
      operationId: watchers_ipo
      path: /api/watchers/ipo
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a new US IPO appears on...'
      trigger: 'WATCHER: get a signed callback when a new US IPO appears on the calendar'
      arm_fields:
      - keyword
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - callbackUrl
    - id: watchers.package-release
      operationId: watchers_package-release
      path: /api/watchers/package-release
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a package publishes a...'
      trigger: 'WATCHER: get a signed callback when a package publishes a new version — track your dependencies'
      arm_fields:
      - registry
      - name
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - registry
      - name
      - callbackUrl
    - id: watchers.paper
      operationId: watchers_paper
      path: /api/watchers/paper
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a new academic paper...'
      trigger: 'WATCHER: get a signed callback when a new academic paper matching your query is published (arXiv
        / PubMed / Semantic Scholar)'
      arm_fields:
      - query
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - query
      - callbackUrl
    - id: watchers.patent
      operationId: watchers_patent
      path: /api/watchers/patent
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a new USPTO patent...'
      trigger: 'WATCHER: get a signed callback when a new USPTO patent matching your query appears'
      arm_fields:
      - query
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - query
      - callbackUrl
    - id: watchers.prediction-market
      operationId: watchers_prediction-market
      path: /api/watchers/prediction-market
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a Polymarket outcome''s...'
      trigger: 'WATCHER: get a signed callback when a Polymarket outcome''s implied probability crosses a level'
      arm_fields:
      - conditionId
      - outcomeIndex
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - conditionId
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.product-recall
      operationId: watchers_product-recall
      path: /api/watchers/product-recall
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a new US product recall...'
      trigger: 'WATCHER: get a signed callback when a new US product recall is published (CPSC)'
      arm_fields:
      - keyword
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - callbackUrl
    - id: watchers.sec-filing
      operationId: watchers_sec-filing
      path: /api/watchers/sec-filing
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a US company files with...'
      trigger: 'WATCHER: get a signed callback when a US company files with the SEC (EDGAR)'
      arm_fields:
      - ticker
      - form
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - ticker
      - callbackUrl
    - id: watchers.stock-price
      operationId: watchers_stock-price
      path: /api/watchers/stock-price
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a US stock crosses a...'
      trigger: 'WATCHER: get a signed callback when a US stock crosses a price you set'
      arm_fields:
      - ticker
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - ticker
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.token-price
      operationId: watchers_token-price
      path: /api/watchers/token-price
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a crypto asset crosses...'
      trigger: 'WATCHER: get a signed callback when a crypto asset crosses a price you set'
      arm_fields:
      - tokenId
      - conditionType
      - threshold
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - tokenId
      - conditionType
      - threshold
      - callbackUrl
    - id: watchers.weather-alert
      operationId: watchers_weather-alert
      path: /api/watchers/weather-alert
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when the US National Weather...'
      trigger: 'WATCHER: get a signed callback when the US National Weather Service issues a new alert for an area'
      arm_fields:
      - area
      - severity
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - area
      - callbackUrl
    - id: watchers.whois
      operationId: watchers_whois
      path: /api/watchers/whois
      price_usd: 0.125
      summary: 'WATCHER: get a signed callback when a domain''s WHOIS...'
      trigger: 'WATCHER: get a signed callback when a domain''s WHOIS registration changes — registrar, expiry,
        or status'
      arm_fields:
      - domain
      - callbackUrl
      - payload
      - expiresInSeconds
      - maxFires
      - label
      required:
      - domain
      - callbackUrl
  schedules:
    operations:
    - schedule_create
    - schedule_status
    - schedule_cancel
    trigger: at (ISO-8601 one-shot) or everySeconds (≥ 60, recurring)
    callback_fields:
    - payload (echoed)
    - scheduleId
    - fireNumber
    - firedAt
  pubsub:
    operations:
    - pubsub_create-topic
    - pubsub_publish
    - pubsub_subscribe
    - pubsub_unsubscribe
    fanout: owner publishes → every CONFIRMED subscriber callbackUrl receives the message, signed
    limits: 100 subscribers per topic, one per URL
inbound_events: null
note: 'Wire type: Webhooks. No AsyncAPI pointer is emitted because no AsyncAPI exists.'