Returns current, sourced and machine-readable evidence supporting or contradicting a predi
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.
50000 (raw units)
price
1
calls / 30d
1
unique payers
2026-09-18
updated
Provider
www.tereno.xyz · discovered, not yet claimed by its owner
Payment (x402 accepts[])
[
{
"scheme": "exact",
"network": "eip155:8453",
"payTo": "0xfbF218ACCBb0D57fc4E8fc3E2A885C910c4C9e94",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "50000",
"maxTimeoutSeconds": 300
}
]Output schema
{
"bazaar": {
"info": {
"input": {
"body": {
"market": "polymarket",
"question": "Will Ethereum Pectra upgrade activate on mainnet before Q4 2026?"
},
"bodyType": "json",
"method": "POST",
"type": "http"
},
"output": {
"example": {
"capabilityId": "prediction.evidence",
"capabilityVersion": "1.0.0",
"invocationId": "uuid",
"pricing": {
"currency": "USDC",
"pricePaidUsd": 0.05
},
"receiptUrl": "/api/v1/receipts/uuid",
"result": {
"agentNote": "This prediction evidence artifact is deterministically hashed and cached.",
"contradictions": [],
"evidence": [
{
"claim": "Ethereum Execution Specs and Consensus Specs schedule Pectra upgrade.",
"confidence": 0.95,
"direction": "supports",
"observedAt": "2026-09-18T10:00:00.000Z",
"source": "Ethereum Foundation EIP Repository & Execution-Specs GitHub",
"sourceUrl": "https://github.com/ethereum/execution-specs",
"verificationType": "primary_doc"
}
],
"executionCostUsd": 0.003,
"limitations": [
"Provides machine-readable verifiable evidence with provenance. Does not place bets or give financial advice."
],
"market": "polymarket",
"observedAt": "2026-09-18T10:00:00.000Z",
"question": "Will Ethereum Pectra upgrade activate on mainnet before Q4 2026?",
"receipt": {
"capabilityVersion": "1.0.0",
"createdAt": "2026-09-18T10:00:00.000Z",
"evidenceDigest": "0xabcdef1234567890abcdef1234567890abcdef1234567890abcdef1234567890",
"hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
"id": "rcpt_pe_1234567890abcdef",
"observedAt": "2026-09-18T10:00:00.000Z",
"question": "Will Ethereum Pectra upgrade activate on mainnet before Q4 2026?"
},
"summary": "Audited proposition. Gathered sourced evidence with verifiable provenance.",
"verdict": "allow"
},
"verdict": "allow"
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"context": {
"description": "Optional contextual metadata from the agent.",
"type": "object"
},
"market": {
"description": "Market platform identifier (e.g. 'polymarket', 'omen', 'kalshi'). Defaults to 'polymarket'.",
"type": "string"
},
"marketUrl": {
"description": "Optional URL to the market page for resolution rules extraction.",
"format": "uri",
"type": "string"
},
"question": {
"description": "Prediction market question or proposition to audit with verifiable evidence.",
"maxLength": 2000,
"minLength": 5,
"type": "string"
}
},
"required": [
"question"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
},
"builder-code": {
"info": {
"a": "bc_8kag0yoi"
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"additionalProperties": false,
"properties": {
"a": {
"description": "App builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"s": {
"description": "Service builder codes",
"items": {
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
},
"type": "array"
},
"w": {
"description": "Wallet builder code",
"pattern": "^[a-z0-9_]{1,32}$",
"type": "string"
}
},
"type": "object"
}
}
}Use it
curl
curl "https://www.tereno.xyz/api/v1/capabilities/prediction.evidence/invoke" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://www.tereno.xyz/api/v1/capabilities/prediction.evidence/invoke");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://www.tereno.xyz/api/v1/capabilities/prediction.evidence/invoke")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/2464.json, and this resource appears in /discovery/resources and /discovery/search.