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io.github.AlexAlves87/otskit-mcp

Official registry Security

Stamp, upgrade, and verify Bitcoin timestamps via AI agents. No API keys required.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @otskit/mcp
Claude Code 
claude mcp add otskit-mcp -- npx -y @otskit/mcp@0.2.1
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "otskit-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@otskit/mcp@0.2.1"
            ]
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. @otskit/mcp
  2. Install
  3. Agent setup
  4. CLI commands
  5. MCP tools exposed to agents
  6. Data directory
  7. Configuration
  8. Development
  9. Dependencies

@otskit/mcp

OpenTimestamps MCP server - stamp, upgrade, and verify Bitcoin timestamps via AI agents.

Exposes a set of tools to any MCP-compatible agent so it can timestamp documents, monitor confirmation status, and verify proofs against the Bitcoin blockchain - all from a conversation.

This is an independent implementation of the OpenTimestamps protocol. It is not affiliated with, endorsed by, or maintained by the OpenTimestamps project.

Note on confirmation times: After stamping, a proof is pending until Bitcoin confirms it. Confirmations typically arrive within ~60 minutes, but can take several hours during network congestion. Use ots-mcp watch or upgrade_timestamp to monitor. A pending proof is not a failed proof.

Install

npm install -g @otskit/mcp

Agent setup

ots-mcp setup claude        # Claude Desktop
ots-mcp setup claude-code   # Claude Code CLI
ots-mcp setup codex         # Codex CLI

Each command writes the MCP entry into the agent's config file, makes a .bak backup if the file already exists, and skips if ots-mcp is already configured. Restart the agent afterwards to apply the changes.

CLI commands

CommandDescription
ots-mcp serveStart the MCP server (stdio transport)
ots-mcp stamp <sha256>Stamp a SHA-256 hash against Bitcoin calendars
ots-mcp upgrade <id>Check if a pending stamp has been confirmed
ots-mcp verify <id>Verify a stamp against Bitcoin
ots-mcp list [status]List stamps (pending / confirmed / failed)
ots-mcp watch [minutes]Monitor pending stamps and attempt due upgrades (default: 30 min, minimum: 15 min)
ots-mcp check-pendingRun one upgrade pass over all pending stamps
`ots-mcp scheduler install\remove\status`Manage OS-level scheduler for auto-upgrades
ots-mcp backup [dest]Backup the SQLite database
`ots-mcp setup <claude\claude-code\codex>`Configure MCP for an agent

MCP tools exposed to agents

ToolDescription
create_timestampStamp a SHA-256 hash against 4 public OTS calendars
upgrade_timestampCheck if a pending stamp has been confirmed in Bitcoin
verify_timestampVerify a stamp - proves hash existed before a given Bitcoin block
verify_external_proofVerify a whitelisted local file against its external .ots proof, without changing the local stamp store
inspect_timestampInspect a stored proof file without network calls
list_pendingList stamps with status, retry count, and filters
watchOpen a terminal window monitoring pending stamps and attempting due upgrades
hash_fileCompute the SHA-256 of a local file and return it as a 64-char hex string (no network calls)
stamp_fileCompute SHA-256 of a local file and stamp it on Bitcoin in one step

Data directory

All data is stored in ~/.ots-mcp/:

~/.ots-mcp/
  ots-mcp.db       # SQLite database (stamps, proof files)
  config.json      # Optional config overrides
  ots-mcp.log      # Log file

Configuration

Create ~/.ots-mcp/config.json to override defaults:

{
  "stamp_enabled": true,
  "scheduler_interval_minutes": 30,
  "retry_max_attempts": 20,
  "calendar_timeout_ms": 10000,
  "calendars": [
    "https://alice.btc.calendar.opentimestamps.org",
    "https://bob.btc.calendar.opentimestamps.org",
    "https://finney.calendar.eternitywall.com",
    "https://btc.calendar.catallaxy.com"
  ]
}

Development

npm run build    # production build
npm run dev      # watch mode
npm test         # run tests

Dependencies

Requires Node.js >= 20.

Frequently asked questions

What is io.github.AlexAlves87/otskit-mcp?

Stamp, upgrade, and verify Bitcoin timestamps via AI agents. No API keys required.

How do I install io.github.AlexAlves87/otskit-mcp?

It runs on your machine. In Claude Code: claude mcp add otskit-mcp -- npx -y @otskit/mcp@0.2.1. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.AlexAlves87/otskit-mcp need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.AlexAlves87/otskit-mcp open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.AlexAlves87/otskit-mcp?

It is published by OTSkit. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.