Zeffy Rate Limits
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.
Zeffy Rate Limits is the machine-readable rate-limit profile for Zeffy on the APIs.io network, conforming to the API Commons Rate Limits specification.
It captures 1 rate-limit definition, measuring requests.
The profile also includes 2 backoff/retry policies defined and response codes documented for success, unauthorized, and throttled.
Tagged areas include Fundraising, Nonprofit, Rate Limiting, and Quotas.
Limits
Policies
Sources
Work with this as data
Every rate limit here is available over the APIs.io API and to AI agents over MCP.
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find_rate_limitsBrowse and filter every rate limit in the catalog.apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.resolveTurn a domain, URL or GitHub org into the provider it belongs to.find_cohortsEvery scored population of providers in the catalog.
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curl "https://apis.io/api/v1/rate-limits/zeffy-rate-limits"curl "https://apis.io/api/v1/rate-limits?limit=25"Discovery needs no key. Ratings and market analysis are Pro.