One of society’s biggest problems is how do we know what’s true? As trust in traditional media steadily declines and AI-generated fake news spams the internet, prediction markets emerge as a new real-time news source powered by collective intelligence.
The TrueCast API aggregates real-time news, social media sentiment, and other data sources, then grounds them by prediction market odds (if available) to provide verified insights and fact checks.

Here is how it works:

• The user query is first passed to an orchestrator model which selects the best data sources for this question
• Currently supported data sources:
  • Perplexity + Tavily web search
  • Real-time social feed using X AI + neynar
  • DeFiLlama and Pyth for DeFi protocol TVL or token prices via CDP AgentKit
  • Truemarkets prediction markets
  • Modular framework to easily add more
• The collected data is then processed by a final reasoning model that provides an answer
• AWS Bedrock ApplyGuardrail API is used for contextual grounding check of the final API response with respect to the retrieve data source information and relevance to the user’s query
• Optional: API response is stored on IPFS via internal x402 call to Pinata API

Ways to access the x402 protected API:

• AI Agents: Via x402 action provider that I added to CDP AgentKit (https://github.com/coinbase/agentkit/pull/753)
• Users: Through chat interface and x402 payment
• Free trial available that uses CBW subaccounts to showcase improved user experience without wallet popups
• TrueCast agent @truecastagent can be tagged on Farcaster with a query
  • If tagged within a a cast thread, the agent is context aware (via neynar LLM) and can understand queries like: "Is this true?"
  • The first query is free for each user
  • A CDP v2 wallet is created for each users using the fid as unique identifier in
    

    const account = await cdp.evm.getOrCreateAccount({ name:

    ${authorFid}

    , });

  • Agent sends cast to user with wallet address
  • User can send USDC to this address to continue using the service
  • On subsequent queries, CDP v2 user wallet is used for x402 pay until balance runs out
  • User can check balance by tagging agent with !balance keyword
  • User can withdraw balance by tagging agent with !withdraw keyword