Pusher
./CommunicateRealtime messaging and WebSocket API
OpenAPI
$ protocol support
[✗]MCP Server
[✓]OpenAPI Spec
[✗]Accepts MPP
[✗]Accepts x402
[✗]Supports ACP
[✗]Supports UCP
[✗]Skill File
[✗]Plugin Manifest
[✗]llms.txt
[✗]Structured Feed
[✗]Agent Protocol
$ agent access
authAPI Key
onboardingPartial — dashboard signup, then API key
tosNeutral — no bot restrictions
webhooksYes
free tierYes
billingsubscription
#realtime#websockets#messaging
https://pusher.com