Rate limiting is applied to the Companies House API to ensure a high-quality service is delivered for all users, and to protect client applications from unexpected loops.
You can make up to 600 requests within a five-minute period. If you
exceed this limit, you will receive a 429 Too Many Requests HTTP
status code for each request made within the remainder of the
five-minute window. At the end of the period, your rate limit will reset
back to its maximum value of 600 requests.
We reserve the right to ban without notice applications that regularly exceed or attempt to bypass the rate limits.
If you have an application that requires a higher rate limit than the default applied, then please contact us, we will be happy to help.