specification: API Commons Rate Limits
specificationVersion: '0.1'
schema: https://raw.githubusercontent.com/api-evangelist/interface-research/main/schema/api-commons.yml#/$defs/RateLimits
provider: Sequin
providerId: sequin-io
created: '2026-07-01'
modified: '2026-07-01'
reconciled: false
tags:
- Change Data Capture
- CDC
- Postgres
- Streaming
- Rate Limiting
- Quotas
description: >-
  Sequin does not publish fixed numeric rate limits for the Management API. On
  self-hosted deployments, throughput is bounded only by your own hardware -
  Sequin sustains roughly 50k operations/sec (~40 MB/s) in published
  benchmarks. On Sequin Cloud, sustained streaming throughput is governed by
  your plan's monthly change-record / data-volume allowance rather than by a
  per-minute request cap. Data-plane delivery (to sinks and via the Sequin
  Stream pull API) is controlled by per-sink configuration such as batch size,
  max concurrency, and backpressure rather than a global limit.
notes: >-
  Numeric per-account or per-endpoint Management API limits are not documented
  as of the review date. Verify Cloud allowances on the pricing page and tune
  sink throughput via batch size and concurrency settings in sequin.yaml.
sources:
- https://sequinstream.com/docs/management-api/introduction
- https://sequinstream.com/docs/performance
- https://github.com/sequinstream/sequin
responseCodes:
  throttled: 429
limits:
- name: Management API Requests
  scope: account
  metric: requests
  limit: not published
  notes: No fixed numeric request-rate limit is documented for the Management API.
- name: Self-Hosted Throughput
  scope: deployment
  metric: operations
  limit: hardware-bound (~50k ops/sec, ~40 MB/s benchmarked)
  notes: Constrained by your own infrastructure, not by Sequin.
- name: Cloud Throughput Allowance
  scope: account
  metric: records
  limit: per plan
  notes: Sequin Cloud meters monthly change records / data volume per plan tier.
- name: Sink Delivery Throughput
  scope: sink
  metric: messages
  limit: configurable
  notes: Governed per-sink by batch size, max concurrency, and backpressure settings.
- name: Sequin Stream Pull Batch
  scope: consumer
  metric: messages
  limit: configurable via batch_size
  notes: The /receive endpoint returns up to batch_size messages per request.
policies:
- name: Backpressure
  description: Sequin applies backpressure when a destination cannot keep up, rather than dropping change events.
- name: Exactly-Once Processing
  description: Change events are delivered with strict ordering and exactly-once processing guarantees, with ack/nack redelivery on the Sequin Stream pull API.
- name: Backoff Strategy
  description: Clients of the Management API and Stream pull API should implement exponential backoff with jitter and honor Retry-After on 429 responses.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com