What the words on this site mean

Nucifra uses a few words that carry a specific meaning. Each one is defined here in one or two sentences. Every unusual word on the site links back to this page.

403

HTTP 403 is the refusal that a server sends when a link is no longer valid. Any system that opens an expired link sees it. Your file is safe: make a new link and use that one.

API key

An API key is a secret that identifies your account. A client with no browser, such as an automated job on a server, sends the key on each request. Nucifra stores only a hash of the key, so nobody can read it back.

bucket

A bucket is a named folder for your files. You put each project or each client in a different bucket. Standard storage tools use this word, so Nucifra keeps it in the API and the documentation.

Content-Type

The Content-Type tells a browser or an ad platform what kind of file this is. A drive share link says text/html, so the platform sees a web page and refuses the file. Nucifra sets the real type, for example video/mp4, on every link.

cover image

A cover image is one still picture that an ad platform shows with your video. Meta needs a separate public link for it, beside the video itself. Nucifra takes the frame for you and gives you both links.

cursor

A cursor is a marker that names where the last list stopped. Send it back to get the next page of files. It is not the Cursor editor, which is a client that connects to Nucifra.

egress

Egress is the data that leaves a storage service when somebody downloads a file. Most services charge for it, and the bill grows with every view of your advertisement. Nucifra charges nothing for it on any plan.

ETag

An ETag is a short code for the exact content of a file. Two files with the same ETag hold the same bytes. A tool uses it to check that an upload arrived without damage.

key

A key is the full address of a file inside Nucifra. It names the folder and the file. Do not confuse it with an API key, which is a secret.

MCP

MCP is the standard that connects an AI agent to an outside tool. Claude Desktop, Claude Code, Claude.ai and Cursor all speak MCP. You add Nucifra to your client once, and the agent can then call its tools.

OAuth

OAuth is the sign-in method that lets a client use Nucifra without a password. You sign in with Google or GitHub, and the client receives a permission instead of a secret. A client with no browser uses an API key instead.

object

An object is one file that Nucifra stores. Nucifra keeps the file bytes and the file type together, which is why a Nucifra link serves the file and not a web page. Standard storage tools use this word for a file.

overage

Overage is the storage that you use above your plan limit. A paid plan bills each extra GB at a fixed rate instead of stopping your uploads. The free plan stops new uploads instead.

presigned link

A presigned link carries its own permission and its own time limit. Nucifra signs the link, so the reader needs no account and no password. When the time ends the signature stops being valid.

public link

A public link is a web address that serves your file to anyone who holds it. It serves the raw file bytes, not a web page. The link stops working when its time limit ends, and you can make a new one at any time.

retention

Retention is how many days Nucifra keeps a file. Your plan sets the number, and Nucifra deletes the file after that time. Upload the file again at any time.

S3-compatible

S3-compatible means standard storage tools can connect to Nucifra. Those tools use the commands they already use, so you do not have to change them. S3 is the storage service that set this industry standard.

scope

A scope is one permission that you give to a client. Nucifra shows every scope on the approval screen before you agree. You can take the permission back at any time.

Streamable HTTP

Streamable HTTP is the connection method that Nucifra uses for MCP. Most current MCP clients support it. You do not have to configure it: the client handles it for you.

sub-processor

A sub-processor is another company that processes your data for us. We stay responsible for what it does. The Data Processing Addendum names every one of them.

A word missing here? Write to support@nucifra.com and we will add it.