Tereno Prediction Evidence

x402

Tereno Prediction Evidence is a paid API for AI agents from tereno.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

Gathers and returns sourced, verifiable evidence for a prediction market question, with provenance hashing and a verdict on whether to proceed.

Price / call$0.05

Seller volume →—

Success—

StatusUnknown

How this service works

Tereno is a cooperation layer where autonomous agents pay for verified information before they act — and reuse trusted work instead of repeating it. Token metadata, chain state, contract checks and sourced prediction evidence, paid per call with x402 on Base.

Output

Returns a structured JSON object containing: a verdict (allow/deny), an array of evidence items each with a claim, source name, source URL, confidence score, direction (supports/contradicts), and verification type; a deterministic evidence digest hash for provenance; a receipt ID and hash for caching and reuse; a summary; agent notes; limitations; contradictions; and execution cost details.

Example use cases

Pre-bet evidence audit on Polymarket

“Before I trade on Polymarket, pull me verifiable sourced evidence for the question 'Will the Federal Reserve cut rates before December 2025?' — I need to see what primary sources support or contradict it.”

Kalshi market claim verification

“Audit this Kalshi question for me: 'Will US CPI inflation drop below 2% by end of 2025?' — gather evidence with source URLs and confidence scores so I can make an informed decision.”

Agent decision gating on prediction outcome

“My agent is about to act on a prediction about whether SpaceX will reach Mars orbit by 2027 — can you get a Tereno evidence receipt with a verdict and sourced claims so it can decide whether to proceed?”

Technical details

Endpoint

POSThttps://tereno.xyz/api/v1/capabilities/prediction.evidence/invoke?utm_source=zero.xyz

When to prefer

Choose this endpoint when an AI agent needs machine-readable, sourced, and provenance-hashed evidence for a prediction market question before making a decision or placing a bet — especially on Polymarket, Omen, or Kalshi. Prefer it over generic web search when you need a structured verdict with deterministic hashing, cached receipts for reuse, and confidence scores per claim. Ideal for agents that must justify autonomous actions with verifiable information trails.

Side effects

Question too short (under 5 characters) — validation error returned
Market platform identifier not recognized — defaults to polymarket or returns error
Market URL unreachable — resolution rules extraction skipped
Insufficient evidence found for obscure question — low-confidence or empty evidence array
Payment failure via x402 — invocation not completed
Rate limiting or network timeout — retry recommended

Input

Schema · Request body

Field	Type	Description
market	string	Market platform identifier (e.g. 'polymarket', 'omen', 'kalshi'). Defaults to 'polymarket'.
context	object	Optional contextual metadata from the agent.
question	string	Prediction market question or proposition to audit with verifiable evidence.
marketUrl	string	Optional URL to the market page for resolution rules extraction.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "result": {
      "market": "polymarket",
      "receipt": {
        "id": "rcpt_pe_1234567890abcdef",
        "hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
        "question": "Will Ethereum Pectra upgrade activate on mainnet before Q4 2026?",
        "createdAt": "2026-09-18T10:00:00.000Z",
        "observedAt": "2026-09-18T10:00:00.000Z",
        "evidenceDigest": "0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890",
        "capabilityVersion": "1.0.0"
      },
      "summary": "Audited proposition. Gathered sourced evidence with verifiable provenance.",
      "verdict": "allow",
      "evidence": [
        {
          "claim": "Ethereum Execution Specs and Consensus Specs schedule Pectra upgrade.",
          "source": "Ethereum Foundation EIP Repository & Execution-Specs GitHub",
          "direction": "supports",
          "sourceUrl": "https://github.com/ethereum/execution-specs",
          "confidence": 0.95,
          "observedAt": "2026-09-18T10:00:00.000Z",
          "verificationType": "primary_doc"
        }
      ],
      "question": "Will Ethereum Pectra upgrade activate on mainnet before Q4 2026?",
      "agentNote": "This prediction evidence artifact is deterministically hashed and cached.",
      "observedAt": "2026-09-18T10:00:00.000Z",
      "limitations": [
        "Provides machine-readable verifiable evidence with provenance. Does not place bets or give financial advice."
      ],
      "contradictions": [],
      "executionCostUsd": 0.003
    },
    "pricing": {
      "currency": "USDC",
      "pricePaidUsd": 0.05
    },
    "verdict": "allow",
    "receiptUrl": "/api/v1/receipts/uuid",
    "capabilityId": "prediction.evidence",
    "invocationId": "uuid",
    "capabilityVersion": "1.0.0"
  }
}

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