Tereno Claim Publication
Publish a deterministic claim about a Base proxy and let the market try to break it. You assert that a contract's implementation slot held one address across a block range, fund a reward for whoever finds a block where it did not, and Tereno writes the claim onchain and adjudicates counterexamples by historical storage reads. If nobody collects before your deadline, you get a reproducible survival receipt: not an audit, but proof the claim stood in public with money on it.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — 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.
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 0.25 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
- 250000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xfbF218ACCBb0D57fc4E8fc3E2A885C910c4C9e94",
"amount": "250000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "POST",
"queryParams": {
"wallet": "0x2222222222222222222222222222222222222222",
"address": "0x1111111111111111111111111111111111111111",
"toBlock": 20500000,
"claimType": "contract.upgrade.window.claim",
"fromBlock": 20000000,
"rewardUsd": 5,
"deadlineHours": 72
}
},
"output": {
"type": "json",
"example": {
"claim": {
"status": "open",
"claimId": "0xabc",
"claimType": "contract.upgrade.window.claim"
},
"pricing": {
"currency": "USDC",
"pricePaidUsd": 0.25
},
"receiptUrl": "/api/v1/claims/0xabc/receipt",
"breadcrumbStatus": "written"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address",
"fromBlock",
"toBlock",
"rewardUsd",
"deadlineHours",
"wallet"
],
"properties": {
"wallet": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "The opener wallet, which must sign the request."
},
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Base proxy contract the assertion is about."
},
"toBlock": {
"type": "integer",
"description": "Inclusive end of the window. Must not be in the future."
},
"claimType": {
"const": "contract.upgrade.window.claim",
"description": "The only claim type whose survival is worth a receipt."
},
"fromBlock": {
"type": "integer",
"description": "Inclusive start of the window. The window must span 1000 to 2000000 blocks."
},
"rewardUsd": {
"type": "number",
"description": "What you will pay the first wallet that falsifies your claim. Not escrowed by Tereno."
},
"deadlineHours": {
"type": "integer",
"description": "How long the claim stays open to challenge, 1 to 720."
},
"implementation": {
"type": [
"string",
"null"
],
"description": "Optional. Defaults to whatever the implementation slot resolves to at toBlock."
}
},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"claim",
"breadcrumbStatus",
"receiptUrl",
"pricing"
],
"properties": {
"claim": {
"type": "object"
},
"pricing": {
"type": "object"
},
"receiptUrl": {
"type": "string"
},
"breadcrumbStatus": {
"type": "string"
}
}
}
}
}
}
}
},
"builder-code": {
"info": {
"a": "bc_8kag0yoi"
},
"schema": {
"type": "object",
"$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
- 2026-09-13 14:34Z
- Last indexed by Roundhouse
- 2026-09-24 08:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 22:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 200
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. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Tereno Claim Publication 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=Tereno%20Claim%20Publication' 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/claims, 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.