Roundhouse AI

Predge · Signed Attestations

SIGNED portable track record of a predictor's live calls: resolved-only decided/correct counts, Wilson 95% lower bound, and a sha256 merkle root content-addressing the exact corpus of signed calls it summarizes (recomputable offline). Records under the min-decided floor carry clears_bar=false. Param: pubkey (64-hex ed25519), query window (30d|90d|all).

SearchLiveeip155:8453Exactvia wellknown:api.predge.io
https://api.predge.io/v1/track-record/:pubkey
Prediction-marketsSigned-dataAttestationTrack-record
Settlements · 30d
25
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$1.43
Verified settled volume
109 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.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9084f5000e07c7133d6da5ee4f271ab6d1821144

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 0x9084…21144. The signed payment is good for 1 minute.

Paid to
0x9084…21144
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
50000 smallest units
Buys
SIGNED portable track record of a predictor's live calls: resolved-only decided/correct counts, Wilson 95% lower bound, and a sha256 merkle root content-addressing the exact corpus of signed calls it summarizes (recomputable offline). Records under the min-decided floor carry clears_bar=false. Param: pubkey (64-hex ed25519), query window (30d|90d|all).
Returns
application/json
50000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme

That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.

Paid to
9dxMRR…LYmpV
Token contract
EPjFWd…TDt1v
Payment window
1 minute
Buys
SIGNED portable track record of a predictor's live calls: resolved-only decided/correct counts, Wilson 95% lower bound, and a sha256 merkle root content-addressing the exact corpus of signed calls it summarizes (recomputable offline). Records under the min-decided floor carry clears_bar=false. Param: pubkey (64-hex ed25519), query window (30d|90d|all).
Returns
application/json
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x9084f5000e07c7133d6da5ee4f271ab6d1821144",
    "amount": "50000",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://api.predge.io/v1/track-record/:pubkey",
    "description": "SIGNED portable track record of a predictor's live calls: resolved-only decided/correct counts, Wilson 95% lower bound, and a sha256 merkle root content-addressing the exact corpus of signed calls it summarizes (recomputable offline). Records under the min-decided floor carry clears_bar=false. Param: pubkey (64-hex ed25519), query window (30d|90d|all).",
    "maxAmountRequired": "50000",
    "maxTimeoutSeconds": 60
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {},
    "payTo": "9dxMRRtC7RKZH5rFZpUywjmnQ87H9qHhtW43u5LYmpV",
    "amount": "50000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "mimeType": "application/json",
    "resource": "https://api.predge.io/v1/track-record/:pubkey",
    "description": "SIGNED portable track record of a predictor's live calls: resolved-only decided/correct counts, Wilson 95% lower bound, and a sha256 merkle root content-addressing the exact corpus of signed calls it summarizes (recomputable offline). Records under the min-decided floor carry clears_bar=false. Param: pubkey (64-hex ed25519), query window (30d|90d|all).",
    "maxAmountRequired": "50000",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "queryParams": {
          "window": "all"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "kind": "calls-track-record",
          "payload": {
            "clears_bar": true,
            "correct_calls": 8,
            "decided_calls": 12,
            "calls_merkle_root": "9f8e…",
            "win_rate_lower_bound": 0.39
          },
          "signature": "…",
          "outcome_verified": true
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method"
          ],
          "properties": {
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "type": "object",
              "properties": {
                "window": {
                  "type": "string",
                  "description": "30d | 90d | all (default all)"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
—
Last indexed by Roundhouse
2026-09-24 11:15Z
Last enriched (probe, favicon, geo)
2026-09-18 20:15Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 400
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 Predge · Signed Attestations 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=Predge%20%C2%B7%20Signed%20Attestations'
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://api.predge.io/v1/track-record/:pubkey, 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.