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: Zeffy
providerId: zeffy
created: '2026-07-05'
modified: '2026-07-05'
reconciled: false
tags:
- Fundraising
- Nonprofit
- Rate Limiting
- Quotas
description: >-
  Zeffy's public API enforces a documented rate limit of 100 requests per minute
  per API key. Exceeding the limit returns HTTP 429. Connections are HTTPS-only.
  The API is read-only and free, so there is no separate paid quota tier - the
  same 100 requests/minute limit applies to every organization's API key.
notes: >-
  Verify the current limit and any retry guidance in Zeffy's interactive API
  documentation. Clients should implement backoff on 429 responses.
sources:
- https://www.zeffy.com/integration/api
- https://support.zeffy.com/get-started-with-the-zeffy-api-yourg
responseCodes:
  success: 200
  unauthorized: 401
  throttled: 429
limits:
- name: API Requests
  scope: apiKey
  metric: requests
  limit: 100 per minute
  notes: Documented limit of 100 requests per minute per API key; 429 on exceed.
policies:
- name: HTTPS Only
  description: All API connections must be made over HTTPS.
- name: Backoff Strategy
  description: Clients should implement exponential backoff with jitter on 429 responses.
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com