Pay-Per-Call Trading Signal API for AI Agents
The author built a trading signal API that allows AI agents to access market data by paying a small fee per call, using the x402 protocol for USDC micropayments on Base L2. This enables autonomous agents to access the data without requiring human signup or API keys.
Why it matters
This API provides a novel solution for enabling autonomous AI trading agents to access market data without the typical human-centric requirements, paving the way for more advanced AI-driven financial services.
Key Points
- 1Developed a trading signal API for AI agents that uses the x402 protocol for USDC micropayments
- 2Agents can access market data by paying a small fee (half a cent) per call, without signup or API keys
- 3The API provides composite momentum scores based on technical indicators like RSI, ADX, and MACD
- 4Supports endpoints for single stock signals, top momentum setups, and portfolio risk analysis
Details
The author recognized that most market data APIs require human signup, API keys, and monthly subscriptions, which are not feasible for autonomous AI trading agents. To address this, they built a trading signal API that uses the x402 protocol to enable pay-per-call access using USDC micropayments on the Base L2 network. The API provides composite momentum scores based on technical indicators like RSI, ADX, and MACD, which agents can use to make trading decisions. It supports endpoints for single stock signals, top momentum setups, and portfolio risk analysis. The entire flow, from the agent calling the API to receiving the data, takes around 200ms. The API is built using FastAPI, the x402 Python SDK, and LRU caching, and is deployed on Fly.io.
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