Pinnacle odds WebSocket in Swift

Answer: create a URLRequest for wss://pinnfeed.io/v1/stream, set the x-api-key header, open it with URLSession.shared.webSocketTask(with:), send a JSON subscribe, and run a receive loop that replies {"type":"pong"} to each ping (every 20 s). Use it on macOS or a server; do not put a key inside an iOS app. Builder or Pro key required.

main.swift (macOS command-line tool)#

import Foundation

let key = ProcessInfo.processInfo.environment["PINNFEED_KEY"]!   // ps_live_...
var request = URLRequest(url: URL(string: "wss://pinnfeed.io/v1/stream")!)
request.setValue(key, forHTTPHeaderField: "x-api-key")
let task = URLSession.shared.webSocketTask(with: request)
task.maximumMessageSize = 32 * 1024 * 1024        // snapshot parts can be large
task.resume()

let sub = #"{"type":"subscribe","sports":["hockey"],"markets":["moneyline","total"],"main":true}"#
task.send(.string(sub)) { if let e = $0 { print("send error", e) } }

func receive() {
    task.receive { result in
        switch result {
        case .success(.string(let text)):
            if text.hasPrefix(#"{"type":"ping""#) {
                task.send(.string(#"{"type":"pong"}"#)) { _ in }
            } else {
                print(text.prefix(160))
            }
        case .success(.data(let data)):
            print("binary frame", data.count)
        case .failure(let error):
            print("closed:", task.closeCode.rawValue, error.localizedDescription)
            return
        @unknown default:
            break
        }
        receive()
    }
}
receive()
RunLoop.main.run()

Parse frames with JSONDecoder in real code; types follow the schema (snapshot, delta with changes[] of market/event upserts and removes).

Close codes#

4002 no_subscription (no subscribe in 30 s), 4008 slow_consumer (buffer over 16 MB), 4001 key_revoked. Reconnect with backoff and expect a fresh snapshot: reconnect.

Plans#

Builder (€99/mo, 3 connections) or Pro. 3-day trial; a card is required and it is charged after day 3 unless you cancel.

Educational content for adults (18+).

Questions people ask#

Why not call PinnFeed from the iPhone app?#

Anyone can extract a key from an app bundle. Run the stream on a server and expose your own API to the app: browser and app keys.

Why raise maximumMessageSize?#

The default limit is 1 MB and the first snapshot parts can be larger on broad subscriptions.

Vapor or SwiftNIO?#

Both have WebSocket clients that accept custom headers; the frames are identical.