SharpSignal

Prediction Market Edge Intelligence — Pay Per Query

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What It Does

SharpSignal is a pay-per-query A2A (agent-to-agent) API that delivers structured probability analysis for prediction market questions. Submit any yes/no or probability proposition — SharpSignal queries Perplexity's sonar-reasoning-pro model with live web search across financial news sources (Bloomberg, Reuters, WSJ, CNBC, Polymarket) and returns a structured edge report covering the current state of affairs, bull and bear cases, and an implied probability estimate. No account, no subscription, no API key required — just send USDC on Base and get actionable intelligence.

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Pricing

Price per query	$0.25 USDC
Subscription required	No
Account required	No
API key required	No
Payment chain	Base (L2)

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How It Works

1. Send $0.25 USDC on Base to: 0x14a129b3e3Bd154c974118299d75F14626A6157B
2. Copy your transaction hash from basescan.org
3. POST to the gateway with the tx hash in the Authorization header

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Gateway URL

https://xosljjzcpsouwifbclsy.supabase.co/functions/v1/payment_gate

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Request Format

curl -X POST "https://xosljjzcpsouwifbclsy.supabase.co/functions/v1/payment_gate" \
  -H "Content-Type: application/json" \
  -H "Authorization: x402 <macaroon>:0xYOUR_TX_HASH" \
  -d '{"route": "prediction-edge", "prompt": "Will the Fed cut interest rates in May 2026?"}'

Body parameters:

Field	Type	Description
route	string	Always "prediction-edge"
prompt	string	Your prediction market question

Authorization header format:

x402 <macaroon>:0xYOUR_TX_HASH

• <macaroon> — any non-empty string (reserved for future access control)
• 0xYOUR_TX_HASH — the Base transaction hash from your $0.25 USDC payment

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Response Format

{
  "status": "success",
  "data": {
    "choices": [
      {
        "message": {
          "content": "## Current Reality\n\n[Two-paragraph summary of the current state of affairs, grounded in live web search results from Bloomberg, Reuters, WSJ, CNBC, and Polymarket.]\n\n## Bull Case (Yes)\n- [Factor supporting the event occurring]\n- [Market signal or data point favoring YES]\n- [Structural or macro tailwind]\n\n## Bear Case (No)\n- [Factor working against the event]\n- [Counter-indicator or opposing signal]\n- [Risk or uncertainty that suppresses probability]\n\n## Implied Probability Estimate\n**62%** — [One-sentence justification based on current market conditions and evidence weight.]"
        }
      }
    ]
  }
}

The content field contains a structured Markdown analysis with four sections:

Section	Description
Current Reality	2-paragraph summary of the current state of affairs, sourced from live web search
Bull Case (Yes)	Bullet points supporting the event occurring
Bear Case (No)	Bullet points arguing against
Implied Probability Estimate	0–100% with one-sentence justification

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Powered By

Component	Technology
AI reasoning + live web search	Perplexity sonar-reasoning-pro
Payment protocol	x402
Payment chain	Base + USDC
Serverless runtime	Supabase Edge Functions

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Use Cases

• AI agents making autonomous prediction market trades on Polymarket, Kalshi, or Metaculus
• Developers building prediction market research bots and alert systems
• On-chain agents that need real-time probability intelligence before executing trades
• Quant researchers stress-testing market hypotheses against live news sources
• LLM pipelines that need a grounded, structured probability signal as a tool call

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Error Responses

HTTP Status	Error	Meaning
402	Payment Required	No valid Authorization: x402 header sent
402	Payment already used	This tx hash was already spent (replay protection)
402	Transaction not found on Base	Tx is pending or invalid
402	Insufficient payment	USDC amount sent was below $0.25
404	Route not configured	Route name not recognized

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Built On

SharpSignal is part of the Swarmrails ecosystem — a suite of x402-gated AI APIs built for autonomous agents on Base.