Roundhouse AI

Prediction Market Evidence

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.

TradingLiveeip155:8453Exactvia cdp
https://www.tereno.xyz/api/v1/capabilities/prediction.evidence/invoke
Prediction-marketPolymarketEvidenceAgent-tradingProvenance
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far.
$7.23
Verified settled volume
238 settlements proven x402 by their on-chain EIP-3009 marker.
$0.050
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-18 12:40Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xfbF218ACCBb0D57fc4E8fc3E2A885C910c4C9e94

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.05USDC≈ $0.05 USD
on Base · exact scheme

Pay 0.05 USDC on Base to 0xfbF2…C9e94. The signed payment is good for 5 minutes.

Paid to
0xfbF2…C9e94
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
50000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xfbF218ACCBb0D57fc4E8fc3E2A885C910c4C9e94",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "market": "polymarket",
          "question": "Will Ethereum Pectra upgrade activate on mainnet before Q4 2026?"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "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"
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "question"
              ],
              "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",
                  "format": "uri",
                  "description": "Optional URL to the market page for resolution rules extraction."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "a": "bc_8kag0yoi"
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  }
}

Provenance

Seen in the source catalog
2026-09-18 12:40Z
Last indexed by Roundhouse
2026-09-25 07:30Z
Last enriched (probe, favicon, geo)
2026-09-18 18:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 405
Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 7 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Prediction Market Evidence and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Prediction%20Market%20Evidence'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://www.tereno.xyz/api/v1/capabilities/prediction.evidence/invoke, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.