loop-mcp

not graded

15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402).

About this server

The com.loopxxi/loop-mcp server provides 15 pay-per-call Bitcoin and developer tools paid in sats over Lightning L402 via streamable-http transport. Tools include btc_price, btc_send_decision, lightning_address_resolve, tx_decode_explain, optimal_send_window, json_validate, json_extract and csv_to_json.

Categories: crypto

Remote URL: https://mcp.loopxxi.com/mcp

Repository:

Transport: streamable-http

First seen: 2026-10-18T08:40:05 Last seen: 2026-10-18T08:40:05

30-day uptime: 1.0%

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Tools

Name	Description	Input keys
btc_price	Get the current Bitcoin price in USD and other major currencies. Source: mempool.space. Real-time.
btc_send_decision	Returns a composited send-or-wait recommendation for a Bitcoin transaction. Fetches live mempool and fee data, then outputs a machine-actionable verdict (SEND_NOW, WAIT, or URGENT_ONLY) with fee rates in sat/vB, mempool pressure level, and estimated savings if you wait. Ideal for agents that need a	urgency
lightning_address_resolve	Resolve a Lightning Address ([email protected]) to a payable BOLT11 invoice for a given amount. Handles the full LNURL-pay protocol internally. Returns the invoice plus min/max sendable amounts for validation.	address, amount_sats
tx_decode_explain	Fetch a Bitcoin transaction by txid and return a structured, agent-ready summary: type (P2WPKH/P2TR/P2SH/etc.), input/output counts, fees, fee rate in sat/vB, confirmation status, RBF flag, SegWit/Taproot flags, and a one-line agent_summary string ready for LLM context injection. Saves 500-2000 toke	txid
optimal_send_window	Bitcoin transaction timing intelligence. Returns a congestion forecast for the next 1-4h, a recommended UTC send window when fees are projected at/below your target, a fee trajectory (rising/stable/falling) with a calibrated confidence score, next-block minimum fee, confirmation targets for 3/6/144	hours_ahead, target_sat_vb
json_validate	Validate JSON, identify its root type, and return normalized JSON plus a SHA-256 content hash.	json
json_extract	Extract one value from JSON using a simple dot path with array indexes, for example users[0].email.	json, path
csv_to_json	Convert CSV, TSV, semicolon, or pipe-delimited text into structured JSON with bounded row output.	csv, delimiter, header, max_rows
text_analyze	Return deterministic text statistics, estimated tokens, reading time, and a SHA-256 content hash.	text
hash_generate	Generate a SHA-256 or SHA-512 digest in hexadecimal or Base64 form.	algorithm, encoding, text
base64_convert	Encode UTF-8 text to Base64 or decode Base64 safely, with standard and URL-safe alphabets.	action, data, url_safe
timestamp_convert	Convert Unix seconds, Unix milliseconds, RFC3339, or ISO dates into normalized UTC timestamp forms.	from, value
uuid_generate	Generate one to one hundred cryptographically random RFC 4122 UUID version 4 identifiers.	count
url_parse	Parse an HTTP or HTTPS URL into normalized scheme, host, port, path, query, and fragment fields without fetching it.	url
jwt_decode	Decode JWT header and payload claims locally without verifying the signature. The response always marks verification as false.	token

Issues

No issues found

Install

claude mcp add --transport http loop-mcp https://mcp.loopxxi.com/mcp

{
  "mcpServers": {
    "loop-mcp": {
      "type": "http",
      "url": "https://mcp.loopxxi.com/mcp"
    }
  }
}

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