1Lookup · Rate Limits

1Lookup Rate Limits

1Lookup publishes a four-tier rate-limit model, rewritten since the 2026-08-09 capture: standard lookups are 200 requests per 10 seconds PER API KEY, live-fetch lookups get 1,000 per minute per key, a hard ceiling of 500 requests per second (and 5,000 per 10 seconds) applies across everything, and account/monitoring calls are 1,000 per minute per organization. The previously recorded flat "1,000 requests per minute per organization" now describes only the account/monitoring tier. A 429 carries Retry-After alongside the X-RateLimit-* set, and X-RateLimit-Reset is a Unix timestamp. Credits are a separate budget. Bulk-job status and result polling are excluded from the lookup budget.

1Lookup Rate Limits is the machine-readable rate-limit profile for 1Lookup on the APIs.io network, conforming to the API Commons Rate Limits specification.

It captures 6 rate-limit definitions, measuring requests_per_10_seconds, requests_per_minute, and requests_per_second.

The profile also includes response codes documented for throttled, throttledCode, insufficientCredits, and insufficientCreditsCode.

Tagged areas include Rate Limiting and Data Validation.

6 Limits Throttle: 429
Rate LimitingData Validation

Limits

Standard lookups api_key
requests_per_10_seconds · 10 seconds
200
The default tier for the single-shot validation and enrichment products.
Live-fetch lookups api_key
requests_per_minute · minute
1000
These hold a connection open for seconds at a time, so they get their own window.
Hard ceiling (per second) api_key
requests_per_second · second
500
Applies across everything, on top of the per-tier limits.
Hard ceiling (per 10 seconds) api_key
requests_per_10_seconds · 10 seconds
5000
Applies across everything.
Account and monitoring organization
requests_per_minute · minute
1000
GET /account and the job-change-monitor endpoints.
Bulk job status and result polling organization
requests_per_minute · minute
-1
Free, and explicitly excluded from the lookup rate budget.

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/1lookup-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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