graphadvocate.com
No description published for this endpoint.
The wallet the 402 directs payment to. Its full payment record is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
Recent payments · which agents last used it
Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change. Always read the 402 the endpoint answers with.
{
"hint": "Decode the base64 `payment-required` response header for the full x402 challenge (accepts, schema, output example).",
"error": "Payment required",
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying: a price here is a claim, not a quote.
Pay 0.05 USDC on Base to 0x0FF5…e7C86. The signed payment is good for 5 minutes.
- Paid to
- 0x0FF5…e7C86
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 50000 smallest units
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x0FF5A6ecef783BBA35463ec2F8403B9B5e9e7C86",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://graphadvocate.com/kalshi-polymarket/spread",
"description": "",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 300
}
]Provenance
- Seen in the source catalog
- 2026-09-02 20:51Z
- Last indexed by Roundhouse
- 2026-09-30 20:15Z
- Last enriched (probe, favicon, geo)
- 2026-09-28 12:45Z
- x402 version
- 1
- Max timeout
- 300s
- Liveness probe
- HTTP 402
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.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service graphadvocate.com 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=graphadvocate.com' 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://graphadvocate.com/kalshi-polymarket/spread, 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. Either pay over x402 (mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.