Twitter Search API の利用回数制限は秘密らしい

他のAPIの1時間に利用できる回数の制限は150回らしいのですが、検索に関しては非公開となっているようです。
ドキュメントの上のほうしか見てなくて、150回しか使えないと思ってたからなんか得した感じ。

Search API Rate Limiting

The Search API is rate limited by IP address. The number of search requests that originate from a given IP address are counted against the search rate limiter. The specific number of requests a client is able to make to the Search API for a given hour is not released. Note that the Search API is not limited by the same 150 requests per hour limit as the REST API. The number is quite a bit higher and we feel it is both liberal and sufficient for most applications. We do not give the exact number because we want to discourage unnecessary search usage.

150回以上使えるか確認用に作ったスクリプトはこれ

#!/usr/bin/perl

use strict;
use warnings;

use LWP::UserAgent;
use JSON;

$!=1;
for my $number (1..200) {
  my $query = "java";
  my $ua = LWP::UserAgent->new;
  my $res = $ua->get("http://search.twitter.com/search.json?q=$query");

  if($res->is_success){
    my $json = from_json($res->content, {utf8 => 1});
    if($json->{error}){
      printf "%4d NG: %s\n", $number, $json->{error};
    }else{
      printf "%4d OK: %s results\n", $number, scalar(@{$json->{results}});
    }
  }else {
    die $res->status_line;
  }
}