# Tereno Prediction Market Evidence

> Tereno Prediction Market Evidence is a paid API for AI agents from www.tereno.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-13).

Returns sourced, machine-readable evidence supporting or contradicting a prediction market proposition, with onchain state verification and deterministic provenance receipts.

## Facts

- Endpoint: POST https://www.tereno.xyz/api/v1/capabilities/prediction.evidence/invoke?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tereno-prediction-market-evidence-c3db66d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0vUTG4yh8I1QKvGhJKQ4a

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 tereno-prediction-market-evidence-c3db66d9 -d '<json body>'
```

Example prompt: Before I place a trade, can you pull sourced evidence for the Polymarket question 'Will the US Federal Reserve cut rates in Q3 2025?' and verify the resolution rules and onchain state for it?

## When to prefer this

Choose this endpoint when an agent needs to make an informed, evidence-backed decision before placing a prediction market trade, specifically when verifiable sourcing, onchain state confirmation, and deterministic provenance receipts are required. Prefer over generic web search when machine-readable structured output and resolution rule extraction are needed, or when trading on Polymarket, Kalshi, or Omen.

## Known failure modes

- Market URL is inaccessible or returns no resolution rules — evidence extraction may be incomplete
- Onchain state query fails due to network congestion or RPC unavailability
- Unsupported market platform identifier causes lookup failure
- Question is too vague or too short (under 5 characters) to retrieve meaningful evidence
- Payment failure or insufficient USDC balance prevents invocation
- Primary sources are paywalled or unavailable, reducing provenance quality

## How this service works

Returns current, sourced and machine-readable evidence supporting or contradicting a prediction-market proposition before placing trades. Verifies onchain state, resolution rules, and primary provenance with deterministic receipts.

## Output

A structured, machine-readable response containing sourced evidence (supporting and contradicting) for the prediction market proposition, verified onchain state, extracted resolution rules, primary provenance references, and deterministic receipts for auditability.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "market": {
   "type": "string",
   "description": "Market platform identifier (e.g. 'polymarket', 'omen', 'kalshi'). Defaults to 'polymarket'."
  },
  "context": {
   "type": "object",
   "description": "Optional contextual metadata from the agent."
  },
  "question": {
   "type": "string",
   "maxLength": 2000,
   "minLength": 5,
   "description": "Prediction market question or proposition to audit with verifiable evidence."
  },
  "marketUrl": {
   "type": "string",
   "description": "Optional URL to the market page for resolution rules extraction."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tereno-prediction-market-evidence-c3db66d9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from www.tereno.xyz](https://www.zero.xyz/host/www.tereno.xyz/llms.txt)