Search / com.loopxxi/loop-mcp
protogridR0· no sign-in15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402).
v2.4.0 · active · website · descriptor JSON · versions
{
"mcpServers": {
"loop-mcp": {
"type": "http",
"url": "https://mcp.loopxxi.com/mcp"
}
}
}claude mcp add --transport http loop-mcp https://mcp.loopxxi.com/mcp[mcp_servers.loop-mcp]
url = "https://mcp.loopxxi.com/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"loop-mcp": {
"type": "remote",
"url": "https://mcp.loopxxi.com/mcp",
"enabled": true
}
}
}{
"mcpServers": {
"loop-mcp": {
"type": "http",
"url": "https://mcp.loopxxi.com/mcp"
}
},
"deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=loop-mcp&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vbWNwLmxvb3B4eGkuY29tL21jcCJ9"
}{
"servers": {
"loop-mcp": {
"type": "http",
"url": "https://mcp.loopxxi.com/mcp"
}
}
}{
"mcpServers": {
"loop-mcp": {
"httpUrl": "https://mcp.loopxxi.com/mcp"
}
}
}extensions:
"loop-mcp":
enabled: true
name: "loop-mcp"
type: streamable_http
uri: "https://mcp.loopxxi.com/mcp"
timeout: 300
protocol.modernnewest supported version is 2024-11-05; 2026-07-28 not supported, older versions are deprecated until 2027-07-28protocol.statelessonly applies to 2026-07-28 serversprotocol.transportstreamable HTTPprotocol.list_ttlonly applies to 2026-07-28 serversauth.prm, auth.as_metadata, auth.cimdno remote uses OAuthauth.secret_in_urlno templated URLtools.descriptionsevery tool has a descriptiontools.description_lengthdescriptions are concisetools.schemasevery tool has an object input schematools.annotations15 of 15 tools declare readOnlyHint or destructiveHinttools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: lightning_address_resolve (idempotentHint); text_analyze (idempotentHint); btc_price (idempotentHint); …tools.token_costabout 1,813 tokens to load every tooltools.api_dumptools are not a one-to-one API dumpstability.changesno tool changes in 30 daysstability.rug_pullno tool changed its meaning under the same namedeps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI packageNo tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.
Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.
+dns-namespace +website +reachable +uptime-86% +updated-12d-ago -no-repository
Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.
| remote | auth | reachable | uptime 30d | p50 | protocol | last ok |
|---|---|---|---|---|---|---|
https://mcp.loopxxi.com/mcp streamable-http | none | yes | 86% | 331 ms | 2024-11-05 | 2026-10-20 |
base64_convertread-only | Encode UTF-8 text to Base64 or decode Base64 safely, with standard and URL-safe alphabets. |
btc_priceread-only | Get the current Bitcoin price in USD and other major currencies. Source: mempool.space. Real-time. |
btc_send_decisionread-only | 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 single decision call instead of parsing multiple raw mempool endpoints. |
csv_to_jsonread-only | Convert CSV, TSV, semicolon, or pipe-delimited text into structured JSON with bounded row output. |
hash_generateread-only | Generate a SHA-256 or SHA-512 digest in hexadecimal or Base64 form. |
json_extractread-only | Extract one value from JSON using a simple dot path with array indexes, for example users[0].email. |
json_validateread-only | Validate JSON, identify its root type, and return normalized JSON plus a SHA-256 content hash. |
jwt_decoderead-only | Decode JWT header and payload claims locally without verifying the signature. The response always marks verification as false. |
lightning_address_resolveread-only | 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. |
optimal_send_windowread-only | 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 blocks, and an RBF-viability flag. A synthesis layer above raw fee data — the decision an autonomous payment agent needs before broadcasting. Source: mempool.space. |
text_analyzeread-only | Return deterministic text statistics, estimated tokens, reading time, and a SHA-256 content hash. |
timestamp_convertread-only | Convert Unix seconds, Unix milliseconds, RFC3339, or ISO dates into normalized UTC timestamp forms. |
tx_decode_explainread-only | 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 tokens vs parsing raw TX JSON. |
url_parseread-only | Parse an HTTP or HTTPS URL into normalized scheme, host, port, path, query, and fragment fields without fetching it. |
uuid_generateread-only | Generate one to one hundred cryptographically random RFC 4122 UUID version 4 identifiers. |
Schemas: list_tools.
{
"name": "com.loopxxi/loop-mcp",
"title": "loop-mcp",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://mcp.loopxxi.com/mcp",
"type": "streamable-http"
}
],
"version": "2.4.0",
"websiteUrl": "https://mcp.loopxxi.com",
"description": "15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402)."
}