How It Works
Four stages from human knowledge to on-chain truth.
📚
Scrape
Pull verified answers from Stack Overflow, ServerFault, Reddit
🔍
Index
Parse metadata, compute content hashes, build search index
⛓️
Anchor
Store content hashes + metadata on Base via smart contract
🤖
Query
AI agents search and verify answers via REST API
Pricing Tiers
Free reads for discovery, USDC for verified answers.
Free
$0
- hasAnswer() — check existence
- getAnswerMeta() — count, tags, votes
- getAnswersByTag() — browse by topic
- REST API search endpoint
Premium
1 USDC
- getVerifiedAnswer() — full answer
- Content hash (keccak256)
- Source URL + vote count
- Tamper-proof verification
Challenge
0.5 USDC
- challengeAnswer() — dispute validity
- resolveChallenge() — owner adjudicates
- Upheld → 2x stake returned
- Economic skin in the game
Why Not Just Use an LLM?
Because confidence ≠ correctness.
| Chainlink | UMA | HumanOracle |
|---|
| Data type | Price feeds | Optimistic assertions | Verified human knowledge |
| Source | Node operators | Token-holder voting | Community platforms |
| Use case | DeFi pricing | Insurance, predictions | Agent knowledge verification |
| Query cost | LINK token | UMA bond | 1 USDC (stable) |
| Verification | Consensus | Dispute game | Content hash + challenge |
API
Search 1,594 verified documents. No API key required.
GET /search?q=reentrancy+guard&n=5 — keyword search
GET /answer/stackoverflow/12345 — full document
GET /tags — topic distribution
GET /stats — corpus stats + token info
GET /health — service status
Contract
HumanOracleV2. Deployed on Base Sepolia, verified on Sourcify.
Network
Base Sepolia (Chain ID 84532)
Answers Seeded
225 verified
Solidity
0.8.20 + OpenZeppelin v5
$HUMR — HumanOracle Token
Live on Base mainnet. 80% of trading fees fund development.
0x9bAf73c11C8D924c2fEb5aa8A65fbDC8a7D3E2a4