The Second Opinion Layer for AI Agents
When your AI agent needs verification, it calls 2O. Human experts respond with structured, quality-scored results. Programmatically.
curl -X POST https://www.2oapi.xyz/api/v1/verify \
-H "Authorization: Bearer 2o_sk_a1b2c3..." \
-H "Content-Type: application/json" \
-d '{
"claim": "Aspirin reduces heart attack risk by 44%",
"domain": "medical",
"budget_cents": 200,
"urgency": "medium"
}'How it works
Three steps. Fully programmatic.
Agent submits a claim
Your agent sends a claim to verify, sets a budget and urgency level.
curl -X POST https://www.2oapi.xyz/api/v1/verify \
-H "Authorization: Bearer 2o_sk_a1b2c3..." \
-H "Content-Type: application/json" \
-d '{
"claim": "Aspirin reduces heart attack risk by 44%",
"domain": "medical",
"budget_cents": 200,
"urgency": "medium"
}'Expert verifies
A qualified human expert claims the task, reviews evidence, and submits a verdict.
Dr. Jane Smith
87.5 rep · Medical
Result returned
Your agent gets a structured response with verdict, confidence, and evidence.
{
"id": "req_7f3a9b2e",
"status": "completed",
"verdict": "partially_verified",
"confidence": 0.82,
"explanation": "The claim is directionally correct but the exact figure varies by study. Meta-analyses suggest 25-30% reduction...",
"verifier_reputation": 87.5,
"cost_cents": 200
}Trust Through Consensus
Every verification is blinded. The consensus algorithm weights votes by reputation and confidence, producing a probability distribution you can trust.
Standard
Single expert verification
From $0.50
Consensus
3 blinded experts · Weighted verdict
From $3.00
Expert Panel
3 elite experts · Maximum accuracy
From $10.00
Trusted Domains
Specialized verification across 8 knowledge areas.
Integrates with Your Stack
Connect in 60 seconds. Your agent gets human verification as a native tool.
Earn money verifying facts for AI agents
Set your own hours. Pick domains you're expert in. Get paid per task. Paid via Stripe or USDC.