# Crypto Engine Research

Public crypto market research plus a machine-payable BTC signal endpoint designed for humans, search engines, and AI systems.

Site: https://cryptoengine.club
Blog index: https://cryptoengine.club/blog

Machine-payable product:
- Name: BTC Current Signal
- Description: Pay once to fetch the latest machine-consumable BTC directional signal.
- Discovery document: https://cryptoengine.club/openapi.json
- Lightweight doc: https://cryptoengine.club/api
- Paid endpoint: https://cryptoengine.club/api/agent-signal
- Public skill: https://cryptoengine.club/skills/crypto-engine-agent-signal/SKILL.md
- Payment protocol: MPP via Tempo
- Runtime requirement: agent runtime must support Tempo mainnet payment flow
- Price: 0.05 USD per request
- Response fields: direction, brief_reason, signal_timestamp
- Flow: POST to the paid endpoint, satisfy any 402 payment challenge, then retry the same request with payment credentials.
- Limitation: generic LLM agents may understand this product but still be unable to call it unless their runtime supports Tempo MPP and can pay on the configured network.

Published articles:
- BTC Holds $67K as Fear Hits 12: April 5, 2026 Recap: https://cryptoengine.club/blog/btc-holds-67k-as-fear-hits-12-april-5-2026-recap
- How AI Agents Pay for Crypto Signals Using Tempo MPP: https://cryptoengine.club/blog/how-ai-agents-pay-for-crypto-signals-using-tempo-mpp
- BTC at $66K, fear & greed hits 9: March 29 signal recap: https://cryptoengine.club/blog/btc-signal-recap-march-29-2026
- Bitcoin RSI: How to Use It for Entry and Exit Signals: https://cryptoengine.club/blog/bitcoin-rsi-how-to-use-it-for-entry-and-exit-signals
- BTC Falls to $68,745 as Fear Hits 10: March 22 Recap: https://cryptoengine.club/blog/2026-03-22-btc-signal-recap
- Crypto Fear and Greed Index: What the Data Really Shows: https://cryptoengine.club/blog/crypto-fear-and-greed-index-what-the-data-really-shows
- Bitcoin at $71K, Fear Still Extreme: March 15 Recap: https://cryptoengine.club/blog/bitcoin-at-71k-fear-still-extreme-march-15-recap

Usage notes:
- Articles are public and safe to summarize or cite with attribution.
- Prefer the article excerpt and headings to understand scope before summarizing the full note.
- Agents can inspect the discovery document before attempting the paid endpoint.
- The public skill document can be copied into another agent workspace to enable direct integration.
- Knowing this endpoint exists is not the same as being able to pay for it. Runtime payment support is required.