ctxt.io alternative
A ctxt.io alternative is any tool that lets an AI agent turn its output into a short-lived link. The difference that matters is who can open that link. ctxt.io links are public to anyone holding the URL. ShareBit AI is the private option: a link belongs to your account, and only you and the agents you have paired can read it.
TL;DR
- ctxt.io is genuinely good at this: agent-native, no account, no API key, free short-lived links, and a paid tier for longer ones.
- The deciding axis is visibility. ctxt.io is public by default. ShareBit AI has no public mode and is scoped to your account.
- If a public URL is fine for your output, stay with ctxt.io. If it is not, that is exactly the gap ShareBit AI fills.
What ctxt.io is genuinely good at
ctxt.io is a hosted MCP server at https://ctxt.io/mcp. Point Claude Code, Codex, Cursor, VS Code, or any MCP client at it and your agent can create, read, and delete expiring share links. Setup is one command. There is no account and no API key, and the server is stateless and unauthenticated. Those are real advantages, and they are hard to beat for speed.
Its free tier covers 5 minutes, 30 minutes, 1 hour, 8 hours, or 1 day. The paid tier is $1 per link for 30 days, plus a custom name, password protection, and origin-IP restriction. The MCP default is 1 hour. create_context accepts up to 4 MB and returns the share URL plus robot-readable .md, .txt, and .json twins, so a second agent can read the content back as clean text. read_context fetches a link; delete_context removes one with a delete_token.
That is the same core job as ShareBit AI, done with less setup and a public-by-default posture. Credit where it is due.
The one axis that matters here
If your output is a changelog, a stack trace, or a snippet you would happily paste into a public issue, ctxt.io is the better fit. It is faster to adopt, it needs nothing from you, and the free expiries are generous.
If your output is a diff from a private repo, a customer record, an internal log, or a half-finished plan you do not want indexed or discoverable, a public URL changes the risk. ctxt.io calls its links "bearer-accessible": anyone who has the URL can read them until they expire. It excludes links from search engines and rate-limits creation per IP, but the link itself is the key.
ShareBit AI takes the other position. Paste links are scoped to your Google account and readable only by that account and the agents you have paired to it, and there is no public sharing mode to switch on. For the same job, that is a different answer to "who can read this?"
Both are legitimate choices. They are just answering different questions.
Comparison
| ctxt.io | ShareBit AI | |
|---|---|---|
| Account required | No for free links; no API key | Yes, Google sign-in |
| Link visibility | Public: anyone with the URL can read it until expiry | Private: account-scoped, no public mode |
| Approval gate before the agent uploads | None. create_context creates the link as soon as it returns | Agent is instructed to show a preview and ask first. This is guidance, not server enforcement |
| Who can read it | Anyone with the link (or a password / origin IP on paid links) | Only the owning account and its paired agents |
| Default lifetime | 1 hour over MCP (5m–1d free; 30 days paid) | 30 minutes (up to 24 hours) |
| End-to-end encrypted | No. Stored in plain form; a password is an access gate, not encryption | No |
| MCP tools | create_context, read_context, delete_context | sharebit_create, sharebit_list, sharebit_read, sharebit_rename |
Choose ctxt.io if…
…you want zero setup, no account, and the simplest possible path from agent output to a link you can hand to a teammate, a forum, or another agent. Its free tier is enough for most quick shares, its .md/.txt/.json twins are clean, and 30 days for $1 is cheap. If the content is not sensitive, ctxt.io is arguably the better tool. A public, expiring link is a feature, not a flaw, when the audience is outside your account.
Choose ShareBit AI if…
…the output is private by nature and a public URL is the wrong container. ShareBit AI keeps agent output inside your account. Sign in with Google, pair the agent once with a code, and it can upload a paste that only you and your agents can read. The default lifetime is 30 minutes and the maximum is 24 hours. Files can reach 10 MB and are never split or truncated. After expiry, the body becomes unreadable while the title and timing remain for 7 days. It is a clipboard for AI agents, not a publishing surface. See what is an AI clipboard for the distinction.
Limits
Be honest with yourself about both tools.
ShareBit AI is not end-to-end encrypted. The operator can technically read stored content, and no password layer changes that. It has no public sharing mode, so you cannot use it to hand a link to someone outside your account. If that is the job, ctxt.io is the better choice. There is also no delete-over-MCP tool. Content is removed by a scheduled job at expiry, and credentials are revoked from the web app. The approval step is guidance to the agent, not something the server enforces.
ctxt.io has its own trade-offs: public bearer links, plain-form storage, no end-to-end encryption, a 4 MB cap, and no reliability guarantee. For non-sensitive output those trade-offs buy you real convenience.
Neither tool is the right answer for actual secrets. For that, use a zero-knowledge pastebin built for credentials.
FAQ
Is ctxt.io public? Yes. By default a ctxt.io link is readable by anyone who has the URL, until it expires. Paid links can add a password and origin-IP restriction, but the free path is public.
Does ctxt.io need an account? No. Free ctxt.io links need no account and no API key. The paid tier is bought per link for $1.
Is there a private alternative to ctxt.io? Yes. ShareBit AI does the same core job, but links are scoped to your account and there is no public mode. What it lacks is ctxt.io's zero-setup, account-free reach.
Do I need an API key to use ShareBit AI? No. You sign in with Google and pair your agent once with a one-time code. The paired agent gets its own credential you can revoke.
Can I use ctxt.io and ShareBit AI together? Yes, and some people should. Use ctxt.io for public, throwaway output, and ShareBit AI for anything that belongs inside your account. They are different containers for different content.
Move your private agent output off public links
If the reason you searched for a ctxt.io alternative is that a public URL is the wrong place for your agent output, sign in at sharebitai.sid8x.com, or read the agent setup guide first. Free, no card, no API key. See also the private alternative to a public pastebin.