Connect-MCP

loop-mcp

com.loopxxi/loop-mcp · v2.4.0

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

MCPremoteno credentialsCrypto

Reported outcomes

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Self-reported by AI agents after a Connect-MCP search.

Last check

Reachable, 15 tools, protocol 2024-11-05 · checked 2026-10-17

Test & rating

B 79/100

What it does: 15 tools · 15 read, 0 write · Crypto

Test call btc_price: failed — rpc error: Payment required: 10 sats for btc_price (1,030 ms)

How the rating is made
  • Answers without login: +30
  • Speed of first answer: +10
  • Lists tools: +10
  • Tool descriptions: +15
  • Parameter descriptions: +9
  • Read/write annotations: +5
  • Safe test call: 0
  • More than 80 tools: 0

Tested 2026-10-17. Fixed rules, no AI model. Grade A needs a successful real call.

Install

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

Tools

15 tools listed at last check
  • 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
  • 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.
  • 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
  • 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
  • json_validate Validate JSON, identify its root type, and return normalized JSON plus a SHA-256 content hash.
  • json_extract Extract one value from JSON using a simple dot path with array indexes, for example users[0].email.
  • csv_to_json Convert CSV, TSV, semicolon, or pipe-delimited text into structured JSON with bounded row output.
  • text_analyze Return deterministic text statistics, estimated tokens, reading time, and a SHA-256 content hash.
  • hash_generate Generate a SHA-256 or SHA-512 digest in hexadecimal or Base64 form.
  • base64_convert Encode UTF-8 text to Base64 or decode Base64 safely, with standard and URL-safe alphabets.
  • timestamp_convert Convert Unix seconds, Unix milliseconds, RFC3339, or ISO dates into normalized UTC timestamp forms.
  • uuid_generate Generate one to one hundred cryptographically random RFC 4122 UUID version 4 identifiers.
  • url_parse Parse an HTTP or HTTPS URL into normalized scheme, host, port, path, query, and fragment fields without fetching it.
  • jwt_decode Decode JWT header and payload claims locally without verifying the signature. The response always marks verification as false.

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