# Apache Pulsar

**Canonical:** https://apis.io/providers/apache-pulsar/  
**APIs profiled:** 8

Apache Pulsar is a cloud-native, distributed messaging and streaming platform that provides server-to-server messaging with multi-tenancy, high performance, and geo-replication. It combines messaging and stream processing in a single platform.

## Kin Score — 31.5 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 31.5).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 59.9 |
| Governance | 26.5 |
| Contract Governance | 26.5 |
| Operational Transparency | 10.5 |
| Developer Ergonomics | 11.9 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 21.8 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | derived |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (8)

- **Apache Pulsar Messaging API** — Pulsar messaging protocol for producing and consuming messages on topics, with support for multiple subscription types (Exclusive, Shared, Failover, Key_Shared), schema enforcem...
- **Apache Pulsar Brokers API** — The Brokers API from Apache Pulsar — 2 operation(s) for brokers.
- **Apache Pulsar Clusters API** — The Clusters API from Apache Pulsar — 2 operation(s) for clusters.
- **Apache Pulsar Functions API** — The Functions API from Apache Pulsar — 3 operation(s) for functions.
- **Apache Pulsar Namespaces API** — The Namespaces API from Apache Pulsar — 3 operation(s) for namespaces.
- **Apache Pulsar Subscriptions API** — The Subscriptions API from Apache Pulsar — 2 operation(s) for subscriptions.
- **Apache Pulsar Tenants API** — The Tenants API from Apache Pulsar — 2 operation(s) for tenants.
- **Apache Pulsar Topics API** — The Topics API from Apache Pulsar — 4 operation(s) for topics.

## Agentic access (1)

- **Apache Pulsar Agentic Access** — 29 operations · 13 acting

## Security (2)

- **Apache Pulsar Domain Security** — TLSv1.3 · HSTS · DMARC
- **Apache Pulsar Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Apache Pulsar Plans Pricing**

## Use cases (4)

- **Real-Time Event Streaming** — Stream events between microservices with guaranteed delivery
- **Message Queue** — Use Shared subscription as a traditional message queue
- **Event Sourcing** — Store and replay event streams for event-driven architectures
- **IoT Data Ingestion** — Ingest high-volume IoT telemetry into Pulsar topics

## Tags

Cloud-Native, Messaging, Multi-Tenant, Pub-Sub, Streaming, Apache, Open-Source

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/apache-pulsar/). Scores are computed from the provider's own public artifacts under a published rubric.