AI-generated BUY/SELL/HOLD signal with conviction score for any crypto coin.
What it does
CryptoBuddy's `/signal-simple` endpoint provides an AI-powered trading signal for a given cryptocurrency. You supply a coin symbol (e.g. BTC, ETH, SOL) as a query parameter, and the endpoint returns a structured JSON response containing the symbol, a timestamp, a directional signal (BUY, SELL, or HOLD), and a numeric conviction score indicating the model's confidence.
The endpoint is an x402-enabled service hosted on Render, settling payments in USDC on the Base network. Each call costs up to $0.10 (100,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The service is part of the broader CryptoBuddy platform, which describes itself as offering AI-powered trading signals, market insight, and predictive analysis, though only this simplified signal endpoint is documented here.
No OpenAPI spec, detailed documentation, or usage examples are published by the provider. The input and output schemas are fully described in the x402 challenge response. The input is a POST request with a required `symbol` query parameter (string). The output is a JSON object with four fields: `symbol`, `timestamp`, `signal`, and `conviction`.
Capabilities
Use cases
- —Get a quick BUY/SELL/HOLD recommendation for a cryptocurrency before placing a trade
- —Integrate automated crypto trading signals into a portfolio management bot
- —Poll multiple coin symbols to build a signal dashboard for monitoring market sentiment
- —Feed conviction scores into a risk-management pipeline for position sizing
Fit
Best for
- —Agents or bots that need a simple directional crypto signal on demand
- —Developers building automated trading or alerting systems
- —Quick one-shot crypto sentiment checks without needing full market data
Not for
- —Users needing detailed technical analysis charts or multi-indicator breakdowns
- —Historical backtesting — this endpoint returns a single point-in-time signal
- —Non-crypto asset classes (stocks, forex, commodities)
Quick start
curl -X POST "https://cryptobuddy-96zq.onrender.com/signal-simple?symbol=BTC" \
-H "X-PAYMENT: <x402_payment_proof>" \
-H "Content-Type: application/json"Example
Request
{
"url": "https://cryptobuddy-96zq.onrender.com/signal-simple?symbol=ETH",
"method": "POST",
"headers": {
"X-PAYMENT": "<x402_payment_proof>",
"Content-Type": "application/json"
}
}Response
{
"signal": "BUY",
"symbol": "ETH",
"timestamp": "2025-01-15T12:34:56Z",
"conviction": 0.82
}Endpoint
Quality
The x402 challenge is live and provides a complete input/output schema with clear pricing. However, there is no OpenAPI spec, no documentation pages, no usage examples, and no information about the underlying AI model or data sources. The response schema is inferred from the challenge's outputSchema. Pricing is clear ($0.10 max per call in USDC on Base).
Warnings
- —No published documentation — /docs, /api, /pricing, /README all return 404
- —No OpenAPI or AI plugin manifest available
- —No information about the AI model, data sources, or methodology behind the signals
- —Response example is inferred from the outputSchema; actual response format is unverified
- —This is a crypto trading signal service — signals should not be treated as financial advice
Citations
- —The endpoint returns x402 version 1 challenge with USDC on Base network, maxAmountRequired 100000https://cryptobuddy-96zq.onrender.com/signal-simple
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://cryptobuddy-96zq.onrender.com/signal-simple
- —CryptoBuddy describes itself as AI-powered trading signals, market insight, and predictive analysishttps://cryptobuddy-96zq.onrender.com
- —Input requires a symbol query parameter; output includes symbol, timestamp, signal, and conviction fieldshttps://cryptobuddy-96zq.onrender.com/signal-simple