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Authenticated endpoints are limited to 5 requests per second per API key.

Headers

Successful responses may include rate limit metadata:
{
  "rate_limit": {
    "remaining": 27,
    "reset": 1746127200000
  }
}
FieldMeaning
remainingRequests left in the current window
resetUnix timestamp (ms) when the window resets

When limited

429 responses include retry guidance. Back off and retry after the reset time.

Bulk workflows

When paginating search or enriching many rows:
  • Add 200ms+ delay between calls in scripts
  • Use queue workers with concurrency caps in production
  • Preview counts before full pagination

MCP and agents

Agents can burst tool calls. If you hit 429, instruct the agent to retry with backoff or serialize Huntr calls.

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