EOS Tribe launched a beta version of it's web-socket streaming Spectrum API on Telos Testnet (https://www.telosfoundation.io/).
Telos Testnet Spectrum API web-socket endpoint: wss://testnet.telos.eostribe.io
Sample HTML/JS Client code for Get Actions:
Spectrum Web Sockets
Spectrum Web Sockets Test: Get Actions
Sample HTML/JS Client code for Get Blocks:
Spectrum Web Sockets
Spectrum Web Sockets Test: Get Blocks
Sample HTML/JS Client code for Get Transaction:
Spectrum Web Sockets
Spectrum Web Sockets Test: Get Transactions
See a working example on EOS Tribe website: https://eostribe.io
Feel free to give it a try and provide your feedback at out Telegram channel: https://t.me/EOSTribe
Original post describing Spectrum API architecture: https://steemit.com/eosio/@eostribe/introducing-spectrum-streaming-api-for-eosio
EOS Tribe is committed to continue work on creating innovative solutions for EOSIO.