CTlogs.io · Rate Limits

CTlogs.io Rate Limits

CTlogs.io Rate Limits is the rate-limit profile for CTlogs.io on the APIs.io network — every limit transcribed verbatim from the provider’s own documentation on 2026-11-04.

It captures 9 rate-limit definitions, including Certificate queries per hour (Basic) — Certificate queries (hostname or fingerprint), per hour – 1,000 1,000; Certificate queries per hour (Standard) — Certificate queries (hostname or fingerprint), per hour – 1,000 1,000; Request rate (Basic) — Request rate, per second – 2 5.

Limit state is signalled in the X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, and Retry-After response headers.

Tagged areas include Company, Certificate Transparency, TLS Certificates, SSL, and Security.

9 Limits X-RateLimit-LimitX-RateLimit-RemainingX-RateLimit-ResetRetry-After
Transcribed from the provider's documentation on 2026-11-04 — ctlogs.io/docs.
View Source
CompanyCertificate TransparencyTLS CertificatesSSLSecurityPKIDomainsMCP

Limits

Certificate queries per hour (Basic) per-accountBasic
Certificate queries (hostname or fingerprint), per hour – 1,000 1,000
/v1/certs
· per 1 hour
Certificate queries per hour (Standard) per-accountStandard
Certificate queries (hostname or fingerprint), per hour – 1,000 1,000
/v1/certs
· per 1 hour
Request rate (Basic) per-accountBasicburst
Request rate, per second – 2 5
· per 1 second
Request rate (Standard) per-accountStandardburst
Request rate, per second – 2 5
· per 1 second
Requests in flight (Basic) per-accountBasic
Requests in flight at once – 1 2
Requests beyond the in-flight limit wait a few seconds for a slot and are then refused with 429 and a Retry-After; a refused request costs no quota.
Requests in flight (Standard) per-accountStandard
Requests in flight at once – 1 2
Results per API page per-request
Every query returns up to 100 results.
Paging depth per-query
Paging reaches 5,000 certificates per query
Failed authentication lockout per-ip
More than 30 rejected keys in a minute from one address stops that address for ten minutes
· per 1 minute

Work with this as data

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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/ctlogs-io-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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