Hunter · Rate Limits

Hunter Rate Limits

Hunter applies per-endpoint rate limits enforced per API key, distinct from monthly credit quotas. Most endpoints are limited to 15 requests/second and 500 requests/minute, with Email Verifier (10/sec, 300/min) and Discover (5/sec, 50/min) operating at lower limits. Throttling uses 403 (rate limit reached) and 429 (usage limit / plan exceeded). Credits are tracked separately via the Account Information endpoint.

Hunter Rate Limits is the machine-readable rate-limit profile for Hunter on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 15 rate-limit definitions, measuring requests_per_second, requests_per_minute, and credits_per_month.

The profile also includes 4 backoff/retry policies defined and response codes documented for rateLimitReached and usageLimitReached.

Tagged areas include Rate Limiting, Email, and Sales Intelligence.

15 Limits
Rate LimitingEmailSales Intelligence

Limits

Domain Search API api-key
requests_per_second · second
15
Domain Search API (per minute) api-key
requests_per_minute · minute
500
Email Finder API api-key
requests_per_second · second
15
Email Finder API (per minute) api-key
requests_per_minute · minute
500
Email Verifier API api-key
requests_per_second · second
10
Email Verifier API (per minute) api-key
requests_per_minute · minute
300
Enrichment endpoints (Email / Company / Combined) api-key
requests_per_second · second
15
Enrichment endpoints (per minute) api-key
requests_per_minute · minute
500
Email Count API api-key
requests_per_second · second
15
Discover API api-key
requests_per_second · second
5
Discover API (per minute) api-key
requests_per_minute · minute
50
Free plan monthly credits account
credits_per_month · month
50
Starter plan monthly credits account
credits_per_month · month
2000
Growth plan monthly credits account
credits_per_month · month
10000
Scale plan monthly credits account
credits_per_month · month
25000

Policies

403 vs 429 distinction
403 indicates the per-second/per-minute rate limit was hit and clients should slow down. 429 indicates the monthly usage / credit allotment is exhausted and requires a plan upgrade or waiting until the next billing cycle.
Backoff Strategy
Use exponential backoff on 403 responses. Hunter does not document Retry-After or X-RateLimit headers; pace clients to stay under documented per-endpoint limits.
Failed lookups are free
When emails cannot be found or verifications fail, no credits are consumed.
Account usage tracking
Use the GET /v2/account endpoint to track remaining credits, searches, and verifications programmatically rather than relying on response headers.

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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Tools for rate limits

4 MCP tools reach this
  • 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.
All 92 tools →

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/hunter-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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