# Proof of Intelligence - Submit Answer & Mint POIC Tokens

> Proof of Intelligence - Submit Answer & Mint POIC Tokens is a paid API for AI agents from proof-of-intelligence-mint-web.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Submit an answer to an AI-generated trivia question and mint POIC tokens on-chain if the answer is correct

## Facts

- Endpoint: POST https://proof-of-intelligence-mint-web.vercel.app/api/x402/answer?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/proof-of-intelligence-submit-answer-mint-poic-tokens-fb90ab83
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UBqDjkQTeitXKe5hwereZ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability proof-of-intelligence-submit-answer-mint-poic-tokens-fb90ab83 -d '<json body>'
```

Example prompt: I just got a trivia question from the Proof of Intelligence app — my answer is 'Albert Einstein'. Can you submit that answer to see if it's correct and mint my POIC tokens if I got it right?

## When to prefer this

Use this endpoint when a user has already received a trivia question (from the sibling question-generation endpoint) and wants to submit their answer to verify correctness and earn POIC token rewards. This is specifically for the answer-submission and token-minting step, not question generation.

## Known failure modes

- Wrong answer submitted — no tokens minted, returns incorrect verdict
- Invalid or expired question ID — returns error indicating question not found or session expired
- Missing wallet address — returns validation error
- Payment of $0.001 USDC fails — request rejected before processing
- Smart contract mint failure — answer correct but on-chain minting fails due to gas or contract issues
- Duplicate submission — same question answered twice, returns already-answered error

## How this service works

Submit answer to trivia question and mint POIC tokens if correct. Minimal payment for x402scan visibility.

## Output

Returns whether the submitted answer was correct, and if so, confirms that POIC tokens have been minted to the user's wallet address as a reward for demonstrating intelligence.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "answer": {
   "type": "string"
  },
  "questionId": {
   "type": "string"
  },
  "walletAddress": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "http://json-schema.org/draft-07/schema#",
 "required": [
  "correct",
  "message"
 ],
 "properties": {
  "error": {
   "type": "string"
  },
  "txHash": {
   "type": "string"
  },
  "correct": {
   "type": "boolean"
  },
  "message": {
   "type": "string"
  },
  "usdcTxHash": {
   "type": "string"
  }
 },
 "additionalProperties": false
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/proof-of-intelligence-submit-answer-mint-poic-tokens-fb90ab83/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proof-of-intelligence-mint-web.vercel.app](https://www.zero.xyz/host/proof-of-intelligence-mint-web.vercel.app/llms.txt)