# Sequin

**Canonical:** https://apis.io/providers/sequin-io/  
**Website:** https://sequinstream.com  
**APIs profiled:** 5

Sequin is an open-source Postgres change data capture (CDC) engine that streams Postgres rows and changes to streams, queues, and search indexes - Kafka, SQS, SNS, Kinesis, Redis, NATS, RabbitMQ, Elasticsearch, Typesense, GCP Pub/Sub, Azure Event Hubs, and HTTP/webhook endpoints - with exactly-once processing, backfills, and low-latency delivery. Sequin is self-hostable and also available as Sequin Cloud. Resources are configured declaratively via a sequin.yaml file or programmatically through the Management API; consumers can pull changes over HTTP via the Sequin Stream sink.

## Kin Score — 38.8 / 100 (thin)

Scored 2026-08-25 under rubric 0.14.0. Trend: flat (+0.0 from 38.8).

| Facet | Score |
|---|---|
| Discoverability | 74.1 |
| Contract Quality | 57.1 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 34.2 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 39.5 |
| Access Clarity | 39.5 |

## Agent readiness — 19.8 (agent-aware)

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

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (5)

- **Sequin Backfills API** — Replay existing Postgres rows into a sink.
- **Sequin HTTP Endpoints API** — Reusable HTTP endpoint destinations used by webhook sinks.
- **Sequin Postgres Databases API** — Source Postgres database connections Sequin replicates from.
- **Sequin Sink Consumers API** — Destinations that stream Postgres changes to external systems.
- **Sequin Stream Pull API** — HTTP pull consumption for the Sequin Stream sink.

## Agentic access (1)

- **Sequin Io Agentic Access** — 25 operations · 16 acting

## Security (2)

- **Sequin Io Authentication** — http · 1 scheme
- **Sequin Io Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Sequin Io Plans Pricing**

## Tags

Change Data Capture, CDC, Postgres, Streaming, Open-Source, Data Pipeline

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