The Stelar Signals MCP server provides crypto market analysis and AI-powered text utility tools for MCP-compatible AI agents (Claude Desktop, Cursor, etc.), with free (RapidAPI key required, 50 req/month) and pay-per-call (x402, USDC on Base, no API key) tiers.
Free Tools (RapidAPI key required)
crypto_regime – Classify the market regime (chop / trend_up / trend_down / high_vol) for 8 major assets (SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA), plus a grid-trading suitability verdict.
pricecheck – Get current price, 24h and 7d % change, and a bullish/bearish/neutral signal.
token_risk – Assess volatility/drawdown risk (low/med/high) relative to a 30-day baseline, useful for position sizing.
crypto_sentiment – Score sentiment (−1 to +1, bullish/neutral/bearish) for free-form text or a supported asset's recent price action.
summarize – Generate a concise 3–5 sentence summary from a URL or raw text via LLM.
factcheck – Get a true/false/uncertain verdict, confidence score, and reasoning for any factual claim via LLM.
Paid Tools (x402 pay-per-call)
regime, sentiment, price, risk – Paid equivalents of the free crypto tools above.
telemetry – View live, exchange-ledger-reconciled P&L from a real production grid-trading system (total and per-bot breakdown).
gridparams – Get recommended grid-trading parameters (range, spacing, order size) for a crypto pair and capital amount.
Note: All crypto tools are limited to 8 assets (SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA). LLM-backed tools are fast first-pass signals, not ground truth.
Integration with RapidAPI to access Stelar Crypto Signals AI Toolkit for crypto market regime, sentiment, summarization, fact-checking, price checking, and token risk tools.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@Stelar Signals MCP Check the market regime for Bitcoin"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
An MCP (Model Context Protocol) server that gives any MCP-compatible agent (Claude Code, Claude Desktop, Cursor, Windsurf, Codex …) live crypto market signals and portfolio telemetry.
Six of its tools are pay-per-call over x402 — no signup, no account, and no API key. Your agent pays cents in USDC on Base from its own wallet and gets the data back in the same request.
claude mcp add stelar -- npx -y stelar-signals-mcpOr in any MCP client config:
{
"mcpServers": {
"stelar": { "command": "npx", "args": ["-y", "stelar-signals-mcp"] }
}
}The server starts and lists every tool with no environment variables set.
Related MCP server: BlackSwan MCP Server
Tool | Price | What you get |
| $0.005 | Current price, 24h and 7d change, bull/bear/neutral signal |
| $0.005 | Sentiment score (-1 to +1) and label, for text or an asset |
| $0.005 | Live telemetry of an AI-managed crypto portfolio — allocation, reconciled P&L, signal votes, human-approval trail |
| $0.02 | Volatility / drawdown risk regime — ATR% vs its 30-day p80 baseline, labeled low/med/high |
| $0.03 | Market regime (chop / uptrend / downtrend / high-volatility) plus a grid-trading suitability verdict |
| $0.05 | Grid count, spacing %, price band and per-grid allocation from live 24h market structure |
These call https://api.stelardigital.com, which answers HTTP 402 with a payment
challenge. Any x402-capable client settles it and retries automatically. Assets
covered: SOL, BTC, ETH, XRP, DOGE, LTC, ADA, XLM.
These are live production endpoints backed by real market data — not demo stubs.
crypto_regime, crypto_sentiment, pricecheck, token_risk, summarize,
factcheck are served through RapidAPI. Set RAPIDAPI_KEY to use them:
claude mcp add stelar -e RAPIDAPI_KEY=your-key -- npx -y stelar-signals-mcpWithout the key these six return a clear error; the six paid x402 tools above keep working, because they do not use RapidAPI at all.
GET https://api.stelardigital.com/catalog endpoints, prices, parameters
GET https://api.stelardigital.com/.well-known/x402 x402 discovery manifest
GET https://api.stelardigital.com/openapi.json OpenAPI 3.1 specA hosted streamable-HTTP MCP endpoint is also live at
https://api.stelardigital.com/mcp.
Signals cover the eight majors listed above, not arbitrary tokens.
Paid tools need a funded wallet; without one they return HTTP 402 rather than data.
Every response carries generated_at; nothing is cached longer than a minute.
Built by Stelar Digital. One human. One AI. A whole company.
MIT licensed.
Market regime (chop / trend_up / trend_down / high_vol) for a major crypto pair, powered by the same classifier that steers a live production grid-trading bot. Returns a grid_suitability verdict (good/poor/etc) telling an agent whether current conditions favor range-bound (grid) strategies or trend-following ones. Use this before deciding to deploy a grid bot, mean-reversion strategy, or trend-follow strategy on SOL, XLM, BTC, ETH, XRP, DOGE, LTC, or ADA.
| Name | Required | Description | Default |
|---|---|---|---|
| asset | Yes | Asset symbol, one of: SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA |
Sentiment score (-1 to +1) with a bullish/neutral/bearish label, for either raw text or a crypto asset's recent price action, via an LLM. Give it EXACTLY ONE of text (free-form text to score) or asset (one of SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA). Useful for agents building trading signals, news pipelines, or social-listening tools without running their own LLM sentiment call.
| Name | Required | Description | Default |
|---|---|---|---|
| text | No | Free text to score (omit if using `asset`) | |
| asset | No | Asset symbol to score sentiment for (omit if using `text`) |
Fact-check verdict (true / false / uncertain) with a confidence score (0-1) and a 1-2 sentence reasoning for any factual claim, via an LLM. Useful for content moderation, chatbot/agent guardrails, and misinformation screening. Returns 'uncertain' for opinions or claims requiring live/real-time data.
| Name | Required | Description | Default |
|---|---|---|---|
| claim | Yes | The factual statement to verify |
Current price, 24h and 7d percent change, and a simple bullish/bearish/neutral signal for a major crypto asset. Low-latency market-data lookup for dashboards, bots, and alerts — one of SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA.
| Name | Required | Description | Default |
|---|---|---|---|
| asset | Yes | Asset symbol, one of: SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA |
Tight 3-5 sentence summary of a URL or a raw text block, via an LLM. Give it EXACTLY ONE of url (a page to fetch and summarize) or text (raw text to summarize directly). For agents/pipelines that need a fast, information-dense digest without running their own LLM call or web fetch.
| Name | Required | Description | Default |
|---|---|---|---|
| url | No | Page URL to fetch and summarize | |
| text | No | Raw text to summarize directly |
Volatility / drawdown risk regime (low / med / high) for a major crypto asset, extending the same classifier behind crypto_regime. Tells an agent whether current volatility is elevated vs its 30-day baseline — useful for position sizing and stop-placement logic. One of SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA.
| Name | Required | Description | Default |
|---|---|---|---|
| asset | Yes | Asset symbol, one of: SOL, XLM, BTC, ETH, XRP, DOGE, LTC, ADA |
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
v1.0.0crypto_regimecrypto_sentimentfactcheckpricechecksummarizetoken_riskScored across 6 tools
Most tools are distinct, but crypto_regime and token_risk both describe risk/regime for crypto assets, which could cause confusion despite different focuses (market vs. volatility). Other tools like pricecheck, sentiment, factcheck, and summarize are clearly separated.
All names use snake_case and are descriptive, but there is a mix of single-word names (factcheck, pricecheck, summarize) and crypto-prefixed names (crypto_regime, crypto_sentiment, token_risk). No major inconsistencies, but not perfectly uniform.
With 6 tools, the server is well-scoped for a crypto signals service. Each tool serves a clear purpose without being overwhelming or too sparse.
The set covers market regime, sentiment, price, risk, fact-checking, and summarization. Minor gaps exist (e.g., no on-chain data or advanced technical indicators), but the core signal needs are addressed. The inclusion of general-purpose tools (factcheck, summarize) is a slight deviation from the crypto focus.
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