Exchange fee

How it works

The fee belongs to the venue, not to the vendor. An exchange generates the data, publishes a schedule, and licenses distributors to pass it on; the distributor reports how many subscribers it has permissioned each month and is billed for them. Nothing in that chain is negotiated by you, and nothing in it depends on how much data you request — which is why an API's own costs are dominated by a document its engineers did not write.

The full stack, the words that move the price and the current figures are in what real-time market data costs. This page is the term: what gets called an exchange fee, and the billing mechanics that decide what it does to an invoice.

Four different charges wear the name

• A market data fee. The monthly subscription charge for receiving a venue's prices, priced per subscriber, device or User ID for display use and per firm or platform for non-display use. This is the one this catalogue means.
• An access or port fee. A charge for the connection itself, owed whether or not a single person reads a quote. On NYSE's pricing guide dated 14 May 2026, non-display use carries an 8,400 dollar access fee alongside the per-category charges; the OPRA fee schedule dated February 2026 prices direct access at 1,000 dollars a month. The tape's delayed data policy charges access fees purely for taking real-time information and delaying it — 1,250 dollars a month for Network A last sale information by direct access at the time of writing, less indirectly.
• A transaction fee. The per-share or per-contract charge on execution, which reaches you through your broker. In the same family is the fee an exchange or other self-regulatory organisation owes the SEC under section 31 of the Exchange Act on the aggregate dollar amount of certain sales, at a rate the Commission sets by advisory. It is the line most people have actually seen, and it has nothing to do with data.
• A membership or licence fee. What a firm pays to be a participant. Irrelevant to a data buyer, and a frequent source of confusion in forum answers about why data "costs thousands".

What the mechanics do to a bill

Three properties make a market data exchange fee behave unlike software pricing, and all three sit in the venues' own policy documents.

The quantity is declared, not measured. You are billed for entitlements your vendor reported, on capability rather than use. A permission left switched on is a charge, and NYSE's policy package declines retroactive credit adjustments older than sixty days on indirect billing — so the correction window is short.

It is not pro-rated. In NYSE's disaster recovery policy, where fees apply they apply for the entire month and any use during a month attracts the full charge. Half a month of a feed is a month of a feed.

The schedule changes independently of your contract. Fees are set by the venue and revised on notice — the tape's delay period itself can be respecified on sixty days' written notice — so the number your vendor quoted is downstream of a document that can move without your involvement.

That is also the arithmetic behind "global coverage". There is no global market data fee; there are thirty-odd venue schedules, and outside the US they are shaped as annual licences rather than per-user counts, owed before a vendor's first customer. A cheap API covering US equities and end-of-day everything else is not being lazy. It is declining to pay thirty annual licences.

Why it matters here

The practical test on a card is whether exchange fees are itemised or bundled, and neither answer is wrong. Databento itemises, which is the shape you want when you need one venue deeply and want to see what the venue is charging rather than what the vendor averaged. Alpaca Market Data bundles the consolidated tape into a plan, which is the shape you want when the tape is enough and you would rather not read a schedule at all. Cboe DataShop is the third shape: historical files bought outright, where the per-subscriber machinery never starts.

Two things follow. First, compare plans on the exchange fee assumption rather than the headline — two APIs with the same monthly number differ entirely once your category is professional, non-display or redistributed. Second, every one of those answers is yours to establish before shopping, because a vendor cannot discount a fee it does not own. Start from market data APIs with the answers in hand, or from delayed data if it turns out nothing you are building needs the live number at all.