Question 1

What formats are supported?

Accepted Answer

FastClip accepts uploaded video files (MP4, MOV, AVI, MKV, WebM, M4V, FLV) and audio files (MP3, WAV, AAC, FLAC, OGG, M4A, WMA). All operations work on uploaded media.

Question 2

How does pay-as-you-go work?

Accepted Answer

Deposit funds into your account with a $5 minimum and pay only for each job you run. Your first successful paid top-up gets a 50% bonus, any top-up of $50 or more gets an extra 10%, and the bonuses stack when both apply. Trims cost $0.02 per segment, captions cost $0.02 per input video minute up to 1080p or $0.04 per input video minute for true 4K, AI auto-clip is tiered by source duration, and there are no subscriptions.

Question 3

What is AI Auto-Clip?

Accepted Answer

AI Auto-Clip lets you describe the moment you want in plain English. FastClip analyzes the uploaded media, finds matching highlights, and can return multiple clips when several moments match the prompt.

Question 4

What's the maximum clip length?

Accepted Answer

Manual trims and AI clips can be up to 10 minutes long. GIF exports are limited to 30 seconds (Clip Studio only).

Question 5

How long are download links valid?

Accepted Answer

Download links stay live for 24 hours unless the clip is pinned. Pinned clips remain in storage until you unpin or delete them.

Question 6

What if a clip fails to process?

Accepted Answer

FastClip automatically refunds the reserved amount for any failed clip job, so you are never charged for failed processing.

Question 7

Do I need a credit card to start?

Accepted Answer

No. New accounts receive a $1.00 free balance after email verification, which is enough to try the platform before adding funds.

Question 8

What is AI Analyze?

Accepted Answer

AI Analyze returns timestamps, confidence scores, and transcript excerpts without rendering a clip, so you can preview likely highlights before creating outputs.

Question 9

What output formats are available?

Accepted Answer

The API outputs MP4 video plus MP3, WAV, M4A, and FLAC audio. MP4 requests support 720p, 1080p, and paid-account 4K quality. Audio outputs ignore video quality. GIF output is available in Clip Studio only.

Question 10

What should I know about 4K exports?

Accepted Answer

4K output requires a successful paid deposit and may be limited during infrastructure rollouts. 4K trims cost $0.04 per segment versus $0.02 for standard quality.

Question 11

What happens if the source doesn't support my requested quality?

Accepted Answer

FastClip auto-downgrades to the highest available quality at or below your request. If you request 4K and the source only supports 1080p, FastClip exports 1080p. If you request 720p and the source tops out at 480p, FastClip exports 480p. The delivered quality is returned in the API response and shown in History. Trim pricing uses delivered quality; caption pricing uses detected input resolution.

Question 12

Can I manage clips through the API?

Accepted Answer

Yes. The API supports listing clip history, renaming clips, pinning and unpinning them, deleting them, checking balance, listing saved cards, deleting saved cards, and reloading balance.

Question 13

How is AI auto-clip cost calculated?

Accepted Answer

AI auto-clip is priced by source duration: up to 30 min costs $0.10, up to 60 min costs $0.20, up to 120 min costs $0.35, and up to 240 min costs $0.50. Failed jobs are refunded automatically.

Question 14

What happens to my balance if I don't use it?

Accepted Answer

Deposits do not expire. Funds stay in your account until used. Deposits are non-refundable, and if you delete your account any remaining balance is forfeited.

Question 15

Can I get a receipt or invoice for deposits?

Accepted Answer

Successful deposits trigger receipt emails, and API Reload charges have receipt emails too. If you need extra billing documentation, contact support from the dashboard.

Question 16

What payment methods are accepted?

Accepted Answer

FastClip uses Stripe and currently accepts credit and debit cards. Saved cards can be reused for future deposits and, if enabled, API Reload.

Question 17

What's the minimum deposit?

Accepted Answer

The minimum deposit is $5.00.

Question 18

How do I know when my job is done?

Accepted Answer

Poll GET /v1/clip/{job_id} for clip jobs or GET /v1/upload/{file_id} for upload validation. If you do not want to poll, register webhooks for clip.complete, clip.failed, upload.ready, upload.failed, clip.auto.segment_complete, or clip.auto.segment_failed.

Question 19

Why did my job return a 422 error?

Accepted Answer

A 422 usually means the uploaded file could not be decoded, the format is unsupported, the file exceeds the 5 GB or 3-hour limit, or the source exceeds the AI duration limit for auto-clip or analyze.

Question 20

Can I cancel a job after submitting it?

Accepted Answer

Not currently. FastClip does not expose a cancel endpoint after submission, so the usual pattern is to poll the job until it completes or fails, or use webhooks for notifications.

Question 21

How long does a typical clip take to process?

Accepted Answer

There is no single fixed time because it depends on source length, queue load, output format, and requested quality. Short standard trims usually finish faster than AI jobs or true 4K jobs. Poll the job status or use webhooks if you need an exact completion signal.

Question 22

Are there any restrictions on what content I can clip?

Accepted Answer

Yes. You must only clip content you have the right to use, and compliance with the source platform's terms is your responsibility. FastClip also prohibits malicious uploads, malware, exploit attempts, and abusive webhook use.

Question 23

How many API keys can I have?

Accepted Answer

You can have up to 10 API keys per account. Each key is shown once on creation and can be revoked any time.

Question 24

Can I use FastClip without coding?

Accepted Answer

Yes. The Clip Studio on fastclip.dev lets you upload a file and create trims, AI auto-clips, transcripts, and more without writing code.

Question 25

Can I add this to n8n / Make / Zapier?

Accepted Answer

Yes. FastClip exposes a REST and JSON API plus webhooks, so you can connect it to n8n, Make, Zapier, or any tool that can send HTTP requests and receive webhook events.

Question 26

What does the reserved field mean in the auto-clip response?

Accepted Answer

reserved is the upfront amount held from your balance when the auto-clip job is accepted. It covers the estimated processing cost before the final result is known. If the final cost is lower, the unused amount is refunded after processing, and failed jobs are refunded automatically.

Question 27

Can I have multiple accounts?

Accepted Answer

FastClip accounts are individual, and the Terms say you must not share your account or API keys with other people. If you need separation for different people or workflows, keep them separate instead of sharing one login.

Question 28

How do I delete my account?

Accepted Answer

You can delete your account from the dashboard. FastClip requires you to type DELETE and re-enter your password before the deletion is processed.

Question 29

What happens to my clips if I delete my account?

Accepted Answer

Account deletion is irreversible. FastClip deletes your user, clip records, and related data, removes stored clip objects, and forfeits any remaining balance.

Question 30

How do captions work?

Accepted Answer

Caption Studio creates reusable pre-made or custom presets. To apply captions in the browser, upload a video in Clip Studio, choose Trim or AI Auto, set output to MP4, enable Add captions, choose a preset, and run the job. Captioned outputs are new MP4 clips and do not overwrite the uploaded source.

Question 31

Can I use captions through the API?

Accepted Answer

Yes. Use POST /v1/captions with an eligible video file_id or clip_id to caption an existing source, or include a captions object with preset_ref in POST /v1/clip or POST /v1/clip/auto to caption in the same workflow. Caption pricing is $0.02 per input video minute up to 1080p or $0.04 per input video minute for true 4K.

Question 32

How are captions billed?

Accepted Answer

Caption input resolution is detected automatically from the source. Captions cost $0.02 per input video minute up to 1080p, or $0.04 per input video minute for true 4K. Caption charges are additive when you trim or AI auto-clip and caption in one job.

Question 33

Can I upload custom caption fonts?

Accepted Answer

Signed-in browser users can upload TTF or OTF caption fonts from Caption Studio. Custom fonts and custom presets are account-scoped, while the pre-made caption catalog is available to every account.

Question 34

What video formats can I upload?

Accepted Answer

FastClip accepts common decodable video containers such as mp4, mov, avi, mkv, webm, m4v, and flv. The uploaded object still has to decode to a video. Max file size is 5 GB and max source duration is 3 hours.

Question 35

How long does upload validation take?

Accepted Answer

There is no fixed SLA. Validation starts after the upload finishes and depends on file size and queue load. Poll GET /v1/upload/{file_id} until the status becomes ready.

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