# Context — ctxt.io (remote · ctxt.io)

Share text, markdown, code, or HTML as auto-expiring links

- Trust score: 64/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-20

## Components

- remote · `ctxt.io`: 64/100 (this document), [markdown](https://verifymcp.io/servers/io-ctxt-mcp/ctxt.md), [page](https://verifymcp.io/servers/io-ctxt-mcp/ctxt)

## Channel facts

- Endpoint: `https://ctxt.io/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `1.0.0`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-20.

- **Endpoint Security**: 57/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation check failed: no authorisation is required to call this server, and it exposes a tool marked destructive (delete_context).
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 67/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 686 tokens (~228/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 20/100
  - Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

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

### Codex

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

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "io-ctxt-mcp": {
      "type": "remote",
      "url": "https://ctxt.io/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add io-ctxt-mcp --url https://ctxt.io/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  io-ctxt-mcp:
    url: "https://ctxt.io/mcp"
```

### Other

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

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-19 (score 64, +1)

No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-17 (score 63, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-15 (score 62, +1)

- [functional improvement] Stability: unverified → 0.03

### 2026-08-14 (score 61)

First indexed and scored.

## MCP tools (3)

### `create_context` (~392 tokens)

Create a ctxt.io share link

Share text, markdown, code, or HTML as an auto-expiring ctxt.io link. For visual output (styled reports, tables, charts, diagrams) prefer format=html with self-contained HTML: inline CSS and inline SVG render fully; <script> is stripped server-side and JavaScript never runs, so keep it static. Free expiries: 5m, 30m, 1h (default), 8h, 1d — these return the share URL immediately. ttl=30d and the Pro options (name, password) cost $1 one-time: the link is created in a pending state and the result includes a payment_url a human can open in a browser to complete checkout (platforms enrolled for agentic payments receive an acp block instead and can pay programmatically); until payment the link lives 1 day without Pro features. Anyone with the link can read it. The returned delete_token authorizes deletion via delete_context — keep it private.

Input parameters:

- `content` (string, required): The content to share (max 4MB).
- `format` (string): How to render the content: text (verbatim), markdown (rendered rich), code (syntax highlighted), or html (sanitized and rendered — best for visual output; inline CSS/SVG work, scripts are stripped).
- `lang` (string): With format=code: the language to highlight (e.g. python, javascript, diff). Omit to auto-detect.
- `name` (string): Pro, ttl=30d only: human-readable name appended to the URL as a slug.
- `password` (string): Pro, ttl=30d only: password required to read the link. Access control, not encryption — content is plaintext at rest.
- `ttl` (string): How long the link stays readable. 5m–1d are free; 30d costs $1.

Output parameters:

- `acp` (object): Present when this deployment accepts Agentic Commerce Protocol payments: checkout_endpoint + item_id let an enrolled agent platform complete the $1 purchase without a browser.
- `current_ttl_seconds` (integer)
- `delete_token` (string)
- `expires_at` (string)
- `json_url` (string)
- `manage_url` (string): Browser page where a human holding this link's delete_token can delete or upgrade it later — share it only with the link's owner.
- `markdown_url` (string)
- `paid_ttl_seconds` (integer)
- `payment_url` (string)
- `pending_payment` (boolean)
- `text_url` (string)
- `url` (string)
- `x402` (object): Present when this deployment accepts x402 payments: any agent with an x402 wallet can pay the $1 via the upgrade_context tool — no enrollment.

### `read_context` (~93 tokens)

Read a ctxt.io link

Fetch the content of an existing ctxt.io link. Accepts a full ctxt.io URL, a /3/<code> path, or a bare code. Password-protected links need the password argument.

Input parameters:

- `format` (string): Representation to return.
- `password` (string): Password for protected links.
- `url_or_key` (string, required): Full ctxt.io URL, /3/<code> path, or bare code.

Output parameters:

- `content` (string)
- `created` (string)
- `expires_at` (string)
- `ttl_seconds` (integer)

### `delete_context` (~87 tokens)

Delete a ctxt.io link

Delete a ctxt.io link you created. Requires the delete_token returned by create_context. Immediately removes public access and requests backing-storage deletion. Destructive and not undoable — confirm with the user before calling.

Input parameters:

- `delete_token` (string, required): The delete_token from create_context.
- `url_or_key` (string, required): Full ctxt.io URL, /3/<code> path, or bare code.

Output parameters:

- `deleted` (boolean)

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/io-ctxt-mcp/ctxt#diagnostics

## Score history

- 2026-08-20: 64
- 2026-08-19: 64
- 2026-08-18: 63
- 2026-08-17: 63
- 2026-08-16: 62
- 2026-08-15: 62
- 2026-08-14: 61

## Links

- Remote endpoint: https://ctxt.io/mcp
- Repository: https://github.com/ctxt-io/ctxt-agents
- Website: https://ctxt.io/mcp/docs
- Changelog RSS feed: https://verifymcp.io/servers/io-ctxt-mcp/ctxt.xml
- Changelog JSON feed: https://verifymcp.io/servers/io-ctxt-mcp/ctxt.json
- HTML version of this page: https://verifymcp.io/servers/io-ctxt-mcp/ctxt