You have a plan. You want fundamentals data for 2,666 companies, pulled across 7 Upstox endpoints, and you are already wondering what the paid tier costs to make it go faster. You open the docs looking for a pricing page. You do not find one that answers you.
What you find instead is a forum thread. A developer on the Upstox community asked almost exactly your question: what are the Company Fundamentals API rate limits, and are there paid options for higher limits? The reply, from @Ketan, is not a blog post or a product page. It is a forum answer, and the post you are reading about says it is more useful than most.
The reply lays out the model in six points. Limits apply per API, per user. Each Fundamentals endpoint, whether profile or income statement or any other, has its own allowance: 50 a second, 500 a minute and 2,000 per 30 minutes. Every company and parameter you request counts against that endpoint. Fundamentals calls do not touch the historical candle or other market data limits.
Then comes the line you were hoping to get a different answer to: "The limits are the same for every user, with no paid plan or custom increase." There is nothing to buy. The post notes there are no marketing numbers here, only limits, and they survive because they are concrete.
You might think of a workaround. Spin up a second app, get a second token, double your allowance. The reply closes that door too. All of a user's apps and tokens, OAuth and Analytics alike, share one allowance per API, so a second app buys nothing. The post ties this to the Upstox Login API: the token, not the app, is what is counted. If you go over, you get HTTP 429 with the code UDAPI10005.
Here is the part that matters for your plan. The reply does the arithmetic for the asker. With 2,666 companies across 7 endpoints, paced under 500 a minute per endpoint, it says the download "completes the download in a little over an hour." Your plan, the one you were about to pay to accelerate, finishes in about an hour anyway. The post calls this the right way to answer a rate-limit question: with arithmetic, not a sales link.
The separation also protects you. The market data a fundamentals crawler might otherwise compete with sits on its own pages: the Upstox History V3 API for candles and the Upstox Market Quote V3 API for quotes, each with its own budget. Your crawl does not starve your quotes. Upstox carries 23 API pages on apis.io, and this thread concerns one of them, the Upstox Fundamentals API.
Now the turn, and it is about Upstox's own record. The measurement confirms the answer. Upstox scores 74.7 on the Kin Score, exemplar, with operational transparency at 94.7, the highest of that day's five provider stories, and rate limit signal lit in an Agent Readiness score of 53.3. That is a provider that tells you what it will do.
But the catalog also filed things against Upstox. Contract governance is the weak facet at 18.2, and idempotency and agentic access are unlit. And the limits themselves live in a forum reply, not in the contract. You found them only because someone else asked first. A crawler reading the Fundamentals contract would not see them before earning its first UDAPI10005.
What you take away is practical. Do not budget for a higher tier, because none exists. Pace each endpoint under 500 a minute and plan on a little over an hour for 2,666 companies across 7 endpoints. Do not count on extra apps or tokens. Keep fundamentals and market data on separate budgets in your head. And note that the post's own recommendation is that a table this clear belongs in the Fundamentals contract, where you could have read it before you started.
Read the original: https://apis.io/2026/11/04/upstox-fundamentals-limits-are-per-endpoint-and-cannot-be-bought-higher/