Context — ctxt.io

ctxt.io is a hostedModel Context Protocolserver.

The client-side packaging is open source: the Claude Code plugin, the Codex plugin, the/shareskill, and the install recipes below all live inctxt-io/ctxt-agentson GitHub. If it's useful to you, a star helps others find it.

claude mcp add --transport http ctxt https://ctxt.io/mcp

{ "mcpServers": { "ctxt": { "type": "http", "url": "https://ctxt.io/mcp" } } }

/plugin marketplace add ctxt-io/ctxt-agents /plugin install ctxt@ctxt

codex mcp add ctxt --url https://ctxt.io/mcp

[mcp_servers.ctxt] url = "https://ctxt.io/mcp"

Settings → Connectors →Add custom connector→ enterhttps://ctxt.io/mcp.

Or add it by hand to.cursor/mcp.json(project) or~/.cursor/mcp.json(global):

{ "mcpServers": { "ctxt": { "url": "https://ctxt.io/mcp" } } }

{ "servers": { "ctxt": { "type": "http", "url": "https://ctxt.io/mcp" } } }

Point any MCP client athttps://ctxt.io/mcp. The server is stateless Streamable HTTP: plain JSON responses, no SSE stream, no session ids, no authentication.

Free links are created instantly. When your agent requeststtl=30d, the link is created in a pending state and the tool result includes apayment_url— open it in a browser and complete the $1 checkout to activate the 30 days (and the name/password options). Until payment, the link lives 1 day.

Agentic payments:agent platforms enrolled with us can skip the browser step entirely — when enabled, the tool result carries anacpblock (Agentic Commerce Protocol) and the platform completes the $1 purchase programmatically with a Stripe Shared Payment Token. If you build an agent platform and want access,get in touch.

- content(required) — the text to share, up to 4MB.
- ttl—5m,30m,1h(default),8h,1d, or30d.
- format—text(default, verbatim),markdown(rendered),code(syntax highlighted; optionallang), orhtml(sanitized and rendered — the best choice for visual output).
- name,password— Pro options, honored withttl=30d.

Returns the share URL, its.md/.txt/.jsonvariants, the expiry time, and adelete_tokenthat authorizes later deletion — treat the token as a secret.

Visual output:when your agent produces a styled report, a comparison table, or a chart, have it send self-contained HTML withformat=html— inline CSS and inline SVG render fully, and it beats markdown for anything visual.<script>tags are stripped server-side and JavaScript never executes, so keep it static. For example:

{ "content": "<div style='font-family:system-ui'><h2>Deploy readiness</h2><table style='border-collapse:collapse'><tr><th style='padding:6px'>Check</th><th style='padding:6px'>Status</th></tr><tr><td style='padding:6px'>Tests</td><td style='padding:6px;color:#080'>445 passed</td></tr><tr><td style='padding:6px'>Coverage</td><td style='padding:6px'><svg width='120' height='10'><rect width='120' height='10' fill='#eee'/><rect width='101' height='10' fill='#2a7'/></svg> 84%</td></tr></table></div>", "format": "html", "ttl": "8h" }

Fetch an existing ctxt.io link as markdown (default), plain text, or HTML. Takes the full URL, the/3/<code>path, or the bare code, pluspasswordfor protected links.

Delete a link you created, using itsdelete_token. Immediately removes public access and requests backing-storage deletion. Destructive — agents should confirm with you before calling it.

Every paste URL has robot-readable twins: append.md,.txt, or.json. The.jsontwin returns the content plusttl,created, andexpires_at:

MCP is the supported way for machines tocreatepastes — it carries the rate limits and abuse protections that keep the service free. Creating pastes by other automated means is a violation of ourTerms of Service(section 3) and risks being rate-limited or blocked.

The server is published in theofficial MCP registryasio.ctxt/mcp, and the plugins and skills are developed in the open atgithub.com/ctxt-io/ctxt-agents— issues and pull requests welcome. Questions or ideas:feedback@ctxt.io.

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