Proof Notary
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MediaLiveeip155:8453Exactvia cdp
NotaryProof-of-existenceTimestampEd25519-signatureHash-attestation
Settlements · 30d
155↓ 38%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$31.15
Verified settled volume
575 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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 2026-07-02 05:25Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x1D1B81247C407521E2A01F3E21514870dcf1620fThe 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.
0.01USDC≈ $0.01 USD
on Base · exact scheme
Pay 0.01 USDC on Base to 0x1D1B…1620f. The signed payment is good for 5 minutes.
- Paid to
- 0x1D1B…1620f
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 10000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x1D1B81247C407521E2A01F3E21514870dcf1620f",
"amount": "10000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"hash": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"memo": "invoice #42"
}
},
"output": {
"type": "json",
"example": {
"proof": {
"memo": "invoice #42",
"sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"notarized_at": "2026-07-02T12:00:00Z",
"hash_algorithm": "sha256",
"hashed_server_side": false
},
"cached": false,
"source": "Local Ed25519 proof-of-existence (no external source)",
"anchoring": {
"note": "Signed proof-of-existence receipt (Ed25519), NOT a blockchain-anchored timestamp.",
"method": null,
"anchored": false
},
"timestamp": "2026-07-02T12:00:00Z",
"disclaimer": "Signed proof that this issuer observed the hash at the stated time. NOT a blockchain-anchored or legal (eIDAS/RFC 3161) timestamp.",
"verification": {
"how": "Recompute sha256(content); confirm equals proof.sha256; ed25519-verify signature over canonical claims.",
"offline": true
},
"signed_receipt": {
"claims": {
"kind": "proof_of_existence",
"memo": "invoice #42",
"issuer": "x402-endpoints.onrender.com",
"sha256": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855",
"algorithm": "sha256",
"issued_at": "2026-07-02T12:00:00Z"
},
"algorithm": "ed25519",
"available": true,
"signature": "<hex>",
"public_key": "5b77...9f9d",
"canonicalization": "JSON sort_keys, separators (',',':'), UTF-8"
}
}
}
},
"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",
"required": [],
"properties": {
"hash": {
"type": "string",
"pattern": "^[0-9a-fA-F]{64}$",
"description": "SHA-256 hex digest (64 hex chars) to notarize"
},
"memo": {
"type": "string",
"description": "Optional label bound into the signed proof, e.g. 'invoice #42'"
},
"content": {
"type": "string",
"description": "Alternative to hash: short content hashed server-side (SHA-256), max 100000 chars"
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-02 05:25Z
- Last indexed by Roundhouse
- 2026-07-31 06:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 19:45Z
- x402 version
- 2
- 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 Proof Notary 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=Proof%20Notary' 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://x402-endpoints.onrender.com/proof/notarize, 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.