If you run product or engineering at a platform and you're picking a music API partner, the decision comes down to three things a demo won't show you: whether the license reaches your end users, what the agreement does the day it ends, and how the API behaves at 2 a.m. on a launch weekend. The twelve questions below get at all three.
This guide is for teams putting licensed music inside a product their own users will publish from: video editors, creator tools, e-commerce video, social apps, games, fitness. If you're a brand or agency buying music for your own content, the buying-committee model in best music licensing companies and the 30 questions to ask them is the better fit. Here we cover twelve questions in three groups (rights and coverage, commercial terms, technical fit), what a good answer sounds like, what a bad one sounds like, and who on your side should own each one.
Ask about the exit before the launch
Your users' videos will outlive any contract. Ask the Soundstripe API team how the agreement reads.
Why a music API purchase is a different decision from a music subscription
A music API agreement licenses a catalog for use by people who never signed the contract: your end users. A subscription licenses one company's own output. That single difference changes every question below, because the platform is answering for what thousands of strangers will publish, monetize, and forget about.
The upside is real. Platforms have been doing this at scale for years; see how the Soundstripe API brought licensed music to Shopee, where merchants across 8 markets create over a million videos a month with licensed tracks inside the seller workflow. If you want the business case for embedding music at all, the benefits of a music API for platforms covers it.
One more reason the stakes sit with you: app stores hold the submitting entity responsible for the rights to everything inside the app. Apple's App Store Review Guidelines (guideline 5.2) say apps should be submitted by the person or legal entity that owns or has licensed the intellectual property, and that content from a third-party service must be specifically permitted under that service's terms. When a claim lands, it lands on the platform.
Rights and coverage: questions 1 to 4
These four decide whether your users are covered or just your company. Legal should own them, with product in the room.
1. Does the license cover our end users, or only us?
A platform license covers what your company does: call the API, index the catalog, play tracks inside your product. An end-user grant covers what your users do: export a video with the track in it, publish it, run ads against it. The second grant does not follow automatically from the first. It has to be written into the agreement.
A good answer names end users in the contract and says what they can do with the output. A bad answer is "each user should get their own account" or "royalty-free covers it." Access to an API, commercial use of its output, and what your customers may do downstream are separate questions, and each belongs in writing before launch. One useful framing of that split appears in a pre-launch license checklist for music APIs, which treats "can we access it" and "can our customers use it the way we promise" as different rows on the table.
2. Which uses and channels are excluded?
Music API terms usually carve out a list of things end users cannot do with the track: upload it to music streaming services, submit it to stock libraries, redistribute it as a standalone audio file, register it in a content-matching system, or use it outside named territories. Any one of those can kill a product category you were planning to ship.
A good answer is a written exclusions list you can lay next to your roadmap. A bad answer is "commercial use is fine." The content-matching exclusion matters more than it looks: YouTube's Content ID scans uploads against reference files and can block, monetize, or track a matched video by territory, so a catalog that isn't managed correctly there turns into support tickets from your users.
3. Who is indemnified, and for what?
Indemnification in a platform deal has to name the platform, and ideally its end users, and the cap has to be sized for a platform, not for one brand's ad campaign. Ask what triggers it, what it excludes (modified tracks, use outside the exclusions list), and whether anyone has ever actually invoked it.
Two Soundstripe posts already walk through the mechanics, so this article won't repeat them. For the cap and the "have any of your customers been sued" screen, read vetting music licensing vendors on indemnification. For who is covered when third parties touch the content, read what indemnification actually covers. The platform version of the question is the same, with one addition: your users are the third parties.
4. What happens to content already published if the agreement ends?
Your users will publish videos that outlive your contract. Some of them will monetize those videos for years. Ask what rights survive termination: for the tracks already exported, for the videos already live, and for the library your users have saved to projects but not yet exported.
A good answer is a survival clause you can read. A bad answer is silence, or "that's never come up." If the vendor can't say what happens to a video published in year one when the contract ends in year three, the exposure is yours.
Commercial terms: questions 5 to 8
Finance and biz-dev own these. The theme is predictability: how the cost behaves as you grow, and what you owe the vendor beyond money.
5. How is pricing structured at our scale?
Music APIs price in four shapes: per track licensed, per end user, per seat, or a flat platform fee with tier thresholds. Per-unit models tie cost to usage and spike in a viral month. Flat platform fees tie cost to a forecast and are easier to budget.
A good answer is a model that matches your growth curve with every tier threshold written down. A bad answer is a rate card with no ceiling. Ask what the bill looks like at ten times your current export volume, and get the answer in numbers.
6. What usage reporting do we owe, and what do you give us?
Some catalogs require the platform to report plays, exports, or territories back to the vendor so rights holders get paid. Some vendors send usage analytics back to you. Both are contract terms, and both need a format and a cadence. If broadcast or television is in your users' plans, the cue sheet enters the picture; business music licensing terms explained defines that and the rest of the vocabulary.
A good answer is a reporting schedule in the agreement with a file format attached. A bad answer is "we'll work that out."
7. Is this API access only, or can we resell or white-label?
Three partnership shapes exist. An API integration puts the catalog inside your product under your interface. A reseller agreement lets you distribute the catalog to your customers under the vendor's terms. A white-label arrangement puts the vendor's catalog behind your brand. The contract you sign decides which one you are in.
Soundstripe's music API for platforms page names three paths in its own words: "Use our API," "Resell our music," and "Build something new." Ask any vendor the same question: which path is this agreement, and what would it take to move to another one later?
8. What is the exit path?
Every integration ends eventually. Ask three things: how much notice either side must give, whether track identifiers and license records export in a usable format, and what happens to previews and masters served from the vendor's CDN on the last day. If audio goes dark at midnight, your users' saved projects break at midnight.
A good answer is a notice period and a data export written into the agreement. A bad answer is a shrug.
Technical fit: questions 9 to 12
Engineering owns these. Every one of them can be tested in a sandbox before anyone signs anything.
9. What uptime do you commit to, and what happens when you miss it?
A vendor that says 99.9% availability is describing about 8.76 hours of downtime a year (0.1% of 8,760 hours), or roughly 44 minutes a month. Ask three follow-ups: is that number an SLA with remedies or a marketing claim, is it measured monthly or annually, and does it cover the CDN that serves audio or only the API that returns metadata?
A good answer is a signed SLA with a measurement window and a credit schedule. A bad answer is a status page with no history.
10. What are the rate limits, and how should we handle them?
Every production music API throttles. The questions are the limit, the key it applies to (API key, IP, end user), and whether a 429 response carries retry guidance. Exponential backoff is the standard client response to a 429; Google's own API usage-limit documentation describes it as a standard error-handling strategy for network applications, and a music vendor's docs should say the same.
As a reference point, Soundstripe's rate limit documentation states a basic limiter of 25 requests per second per client, a 429 on excess, and a recommendation to retry with exponential backoff and some randomness. Whichever vendor you evaluate, that is the shape of a good answer: a number, a key, and a retry pattern, all in public docs.
11. How is the catalog delivered, and where do the files live?
Two patterns dominate. In the first, you index the vendor's catalog on a schedule (nightly is common), run your own search and filters, and serve audio from the vendor's CDN. In the second, you call the vendor's search live on every query. The first gives you control over the experience; the second gives you less to maintain. Either way, ask which files reach the browser: a preview MP3 for the front end is normal, while the master WAV should stay on the back end and get stitched in at export.
Two more details belong in the integration guide before you ask. Soundstripe's integration documentation recommends the nightly-index pattern, requires serving content through its CDN, and asks that WAV URLs stay off the client until they're actually needed. And API keys should sit behind your own proxy, not in client-side code; the CE.SDK Soundstripe plugin guide from IMG.LY makes a proxy server a production requirement for exactly that reason.
12. Can we build a prototype from the docs alone?
Documentation quality predicts integration time better than any sales call. The test is simple: get a sandbox key, hand the docs to one engineer, and see whether a working prototype appears without a support ticket.
This is not a niche expectation anymore. Postman's 2025 State of the API report found that 83.2% of more than 5,700 surveyed developers and API professionals work with some level of an API-first approach.
Who should own each question on your side
Rights and coverage go to legal. Commercial terms go to finance and biz-dev. Technical fit goes to engineering. Product owns the whole list and the decision. The buying-committee post linked further up lays out the full model for brand teams; the roles translate directly.
What a good partner's answers have in common
They're written, they're specific, and most of them were already in the documentation or the agreement before you asked. A partner who has answered these twelve questions for other platforms has the exclusions list, the survival clause, the SLA, and the rate limits ready to send. A vendor who hasn't will promise to get back to you. Take the one who already did the work.
Start with the docs
Twelve questions, answered in the docs before you ask. Explore the Soundstripe music API.
Frequently asked questions
Only if the agreement says so. A platform license covers your company's access to the API; an end-user grant covers what your users do with exported tracks, and it must be written into the contract rather than assumed from the phrase "royalty-free."
Common exclusions are distribution to music streaming services, upload to stock libraries, redistribution of the track as a standalone audio file, registration in content-matching systems, and use outside named territories. Ask for the written list and compare it to your roadmap.
It depends entirely on the survival clause in your agreement. Ask what rights continue for tracks already exported, videos already published, and projects saved but not yet exported, and get the answer in the contract rather than in an email.
A flat platform fee is easier to forecast because cost follows a tier rather than every export, while per-track or per-user pricing ties cost to usage and can spike in a viral month. Model both at ten times your current volume before choosing.
Ask for the uptime commitment and its remedies, the rate limit and the key it applies to, how the catalog is delivered (scheduled index or live search, and which files reach the browser), and whether one engineer can build a prototype from the public docs alone.
