Papercups
Papercups is an open-source customer-messaging and live-chat platform built on Elixir/Phoenix, positioned as a self-hosted alternative to Intercom. It exposes a REST API for conversations, messages, and customers, a realtime chat surface over Phoenix WebSocket channels, and outbound webhooks. The project is in maintenance mode (community-maintained, no major new features).
Papercups publishes 5 APIs on the APIs.io network, including Realtime Chat API (WebSocket / Phoenix Channels), Conversations API, Customers API, and 2 more. Tagged areas include Customer Messaging, Live Chat, Open Source, Support, and Intercom Alternative.
The Papercups catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.
Papercups’ developer surface includes authentication, documentation, and 8 more developer resources.
Kin Score
APIs 7
Individual APIs this provider publishes, each with its own machine-readable definition.
Papercups Notifications & Webhooks API
Outbound event subscriptions delivered as webhooks (message:created, conversation:created, conversation:updated, and a webhook:verify challenge handshake) notifying external sys...
Papercups Realtime Chat API (WebSocket / Phoenix Channels)
Bidirectional realtime live chat over Phoenix WebSocket channels. Clients join conversation, conversation-lobby, and account-room channels and exchange shout (message), messages...
Papercups Webhooks
Register external HTTPS endpoints to receive Papercups events as POSTed JSON payloads of shape { event, payload }, with a verify-challenge handshake on registration.
Papercups Conversations API
Threads of messages between customers and agents.
Papercups Customers API
Customer records (users, leads, or contacts).
Papercups Messages API
Individual messages within conversations.
Papercups Users API
Authenticated user and team members.
Scroll for all 7
Open Collections 1
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Papercups API
OPEN COLLECTIONPricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Papercups Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Papercups Finops
FINOPSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Papercups Realtime Chat (WebSocket / Phoenix Channels)
AsyncAPI 2.6 description of Papercups' **realtime live chat** surface. Unlike many providers, Papercups exposes a genuine, bidirectional **WebSocket** transport: the chat widget...
ASYNCAPISpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
Papercups API Rules
SPECTRALSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API