AI-generated trivia question via Claude Sonnet 4.5, paid per call with USDC on Base.
What it does
This x402 endpoint generates a unique multiple-choice trivia question powered by Claude Sonnet 4.5. Each GET request returns a JSON object containing the question text, four answer options, the correct answer, an optional category and difficulty level, and a timestamp. The endpoint is part of the "Proof of Intelligence Mint" (POIM) project on Base, where correct answers allow users to mint 5000 POIC tokens.
Pricing is 1.25 USDC per question (paid via the x402 protocol on Base). According to the project site, $1.00 of each payment goes to a USDC liquidity pool accumulating toward a Uniswap V4 launch, and $0.25 covers gas and AI generation costs. The payment is made to address 0x32d831cd322EB5DF497A1A640175a874b5372BF8 using USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on the Base network.
The endpoint is discoverable and live, returning a standard x402 402 challenge when called without payment. There is no separate API documentation; the output schema is fully specified in the x402 challenge itself. The endpoint is designed to be called by both human-driven frontends and autonomous x402 agents.
Capabilities
Use cases
- —Autonomous agents mining POIC tokens by answering trivia questions
- —Building trivia game interfaces that source unique AI-generated questions
- —Demonstrating x402 micropayment flows with a concrete, interactive use case
- —Integrating AI-generated quiz content into educational or entertainment apps
- —Benchmarking agent accuracy on diverse trivia topics
Fit
Best for
- —Developers exploring x402 payment protocol integrations
- —Autonomous agents that can pay USDC on Base for API calls
- —Projects needing on-demand, unique trivia questions from a large language model
- —POIC token miners seeking automated question retrieval
Not for
- —Bulk trivia dataset generation (each call costs 1.25 USDC)
- —Applications requiring free or ad-supported trivia APIs
- —Use cases needing customizable question topics or difficulty levels (no input parameters exposed)
Quick start
# Requires a valid X-PAYMENT header with x402 payment proof on Base
curl -H "X-PAYMENT: <x402_payment_token>" \
https://poim.io/api/x402/questionExample
Response
{
"id": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"options": [
"Jupiter",
"Saturn",
"Uranus",
"Neptune"
],
"category": "Science",
"question": "Which planet in our solar system has the most moons?",
"timestamp": 1719500000000,
"difficulty": "Medium",
"correctAnswer": "Saturn"
}Endpoint
Quality
The x402 challenge is live and includes a complete output schema with required fields. The project landing page provides clear pricing and flow details. However, there is no formal API documentation, no OpenAPI spec, and no input parameters are documented—the endpoint appears to be a simple parameterless GET. The response example is inferred from the output schema.
Warnings
- —No dedicated API documentation exists (docs page returns 404)
- —No input parameters are documented; it is unclear if category or difficulty can be specified
- —Response example is inferred from the output schema, not from an actual API response
- —This endpoint is part of a token-minting game (POIC) which may have regulatory implications depending on jurisdiction
Citations
- —Each question costs 1.25 USDC via x402: $1.00 builds the LP pool, $0.25 covers gas and AI generation feeshttps://poim.io
- —Answer correctly to instantly mint 5000 POIC tokens to your wallethttps://poim.io
- —Questions are generated by Claude Sonnet 4.5https://poim.io
- —Payment goes to address 0x32d831cd322EB5DF497A1A640175a874b5372BF8 using USDC asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://poim.io/api/x402/question
- —After 100k mints, the LP pool auto-launches on Uniswap V4https://poim.io
- —x402 challenge returns maxAmountRequired of 1250000 (1.25 USDC with 6 decimals)https://poim.io/api/x402/question