Quick ZK Auth
Quick ZK Auth v1.0.1 — Semaphore ZK wallet ownership on Base plus USDC balance attestation at snapshot block (not ZK-hidden balance in v1). ERC-8004 bundles with x402 payment binding.
OtherLiveeip155:8453Exactvia cdp
ZkPrivacyWalletUsdcBase
Calls · 30d
4→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$2.02
Verified settled volume
96 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.
4
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-06 14:36Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x85557C90027354eAeFFe9Ee4B4f4014818d8D3e1The 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 0x8555…8D3e1. The signed payment is good for 5 minutes.
- Paid to
- 0x8555…8D3e1
- 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": "0x85557C90027354eAeFFe9Ee4B4f4014818d8D3e1",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"tier": "basic",
"wallet": "0x0000000000000000000000000000000000000001",
"min_balance_usdc": 1000
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"valid": true,
"claims": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"snapshot_block": 25000000,
"nullifier_scope": "quickzkauth-v1",
"min_balance_tier": "1000 USDC",
"ownership_proven": true,
"balance_proof_type": "rpc_attestation",
"ownership_proof_type": "semaphore_zk",
"balance_qualifier_met": true,
"observed_balance_usdc": 2500.5
},
"expiry": "2026-06-03T01:30:00.000Z",
"job_id": "550e8400-e29b-41d4-a716-446655440000",
"calldata": "0x",
"timestamp": "2026-06-03T01:00:00.000Z",
"proof_hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
"verified_by": "Quick AI — Coeur d'Alene, Idaho, US",
"block_number": 25000000,
"privacy_score": "maximal",
"service_version": "1.0.1",
"x402_payment_ref": {
"payer": "0x0000000000000000000000000000000000000002",
"status": "settled",
"network": "eip155:8453",
"tx_hash": "0xabc1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcd",
"poll_uri": "https://zk.quickai.build/proof/550e8400-e29b-41d4-a716-446655440000",
"resource": "POST /prove",
"amount_usdc": "0.05"
},
"verifier_contract": "0x0000000000000000000000000000000000000000",
"erc8004_compatible": true,
"on_chain_verifiable": false,
"validation_registry_hint": {
"reference_uri": "https://zk.quickai.build/proof/550e8400-e29b-41d4-a716-446655440000",
"suggested_tag": "base_wallet_qualification",
"suggested_evidence_type": "zk_proof"
}
}
}
},
"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": [
"wallet",
"min_balance_usdc"
],
"properties": {
"tier": {
"enum": [
"basic",
"standard"
],
"type": "string",
"default": "basic",
"description": "Proof tier (basic or standard qualification)"
},
"wallet": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "Base wallet to prove ownership and USDC balance for"
},
"min_balance_usdc": {
"type": "integer",
"minimum": 1,
"description": "Minimum USDC balance threshold on Base"
}
},
"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",
"required": [
"verified_by",
"valid",
"job_id",
"claims",
"proof_hash",
"block_number",
"expiry",
"verifier_contract",
"calldata",
"on_chain_verifiable",
"timestamp",
"privacy_score",
"erc8004_compatible",
"validation_registry_hint",
"x402_payment_ref",
"service_version"
],
"properties": {
"valid": {
"type": "boolean"
},
"claims": {
"type": "object",
"required": [
"ownership_proven",
"ownership_proof_type",
"balance_qualifier_met",
"balance_proof_type",
"min_balance_tier",
"asset",
"snapshot_block",
"nullifier_scope"
],
"properties": {
"asset": {
"type": "string"
},
"snapshot_block": {
"type": "integer"
},
"nullifier_scope": {
"type": "string"
},
"min_balance_tier": {
"type": "string"
},
"ownership_proven": {
"type": "boolean"
},
"balance_proof_type": {
"enum": [
"rpc_attestation",
"zk_range"
],
"type": "string"
},
"ownership_proof_type": {
"enum": [
"semaphore_zk"
],
"type": "string"
},
"balance_qualifier_met": {
"type": "boolean"
},
"observed_balance_usdc": {
"type": "number"
}
},
"additionalProperties": false
},
"expiry": {
"type": "string"
},
"job_id": {
"type": "string",
"format": "uuid"
},
"calldata": {
"type": "string"
},
"timestamp": {
"type": "string"
},
"proof_hash": {
"type": "string"
},
"verified_by": {
"type": "string"
},
"block_number": {
"type": "integer"
},
"privacy_score": {
"type": "string"
},
"service_version": {
"type": "string"
},
"x402_payment_ref": {
"type": "object",
"required": [
"status",
"network"
],
"properties": {
"payer": {
"type": "string"
},
"status": {
"enum": [
"pending_settlement",
"settled"
],
"type": "string"
},
"network": {
"type": "string"
},
"tx_hash": {
"type": "string"
},
"poll_uri": {
"type": "string"
},
"resource": {
"type": "string"
},
"amount_usdc": {
"type": "string"
}
},
"additionalProperties": false
},
"verifier_contract": {
"type": "string"
},
"erc8004_compatible": {
"type": "boolean"
},
"on_chain_verifiable": {
"type": "boolean"
},
"validation_registry_hint": {
"type": "object",
"required": [
"suggested_evidence_type",
"suggested_tag"
],
"properties": {
"reference_uri": {
"type": "string"
},
"suggested_tag": {
"type": "string"
},
"suggested_evidence_type": {
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-06 14:37Z
- Last indexed by Roundhouse
- 2026-09-24 08:40Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 10:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 404
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 Quick ZK Auth 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=Quick%20ZK%20Auth' 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://zk.quickai.build/prove, 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.