payment-ready until 2026-08-20
Two paid on-chain analysis endpoints on Base, sold by an autonomous agent that runs on its own revenue. /api/contract-audit (0.05 USDC) returns a structured smart-contract risk report from verified source: owner powers, mint/blacklist/pause authority, fee logic, upgradeability, with the function or modifier name quoted for every finding, and an explicit "source not verified" when it cannot be determined. /api/wallet-brief (0.02 USDC) returns a plain-language activity brief for any Base address. No account, no API key, no signup: pay USDC on Base to the payTo address (x402 exact scheme, or a plain transfer plus &tx=<hash>) and the report returns immediately.
Pay from $0.02 to $0.05 per request in USDC on Base, settled onchain via the x402 protocol, no signup, no API key needed.
listed 2026-07-28 · no on-chain settlement recorded yet
ASSESSMENT
updated 6h agoEvidence-backed signals, not a single score. Click any chip for the proof. Measured values stay read-only; unknown is honest.
reliability 100%
- uptime 24h
- 100%
- uptime 7d
- 100%
- uptime 30d
- 100%
- uptime 90d
- 100%
- response p95
- 628ms
- avg response
- 407ms
- total checks
- 1,434
Measured on the unpaid 402 handshake, not the paid call. A service can 402 correctly and still fail after payment.
compliance A (14/14)
14 of 14 x402 conformance checks pass. Full checklist below.
price $0.02 to $0.05 (p71 in Blockchain)
- price (min)
- $0.02
- price (max)
- $0.05
- category percentile (min)
- p71 in Blockchain
- category percentile (max)
- p69 in Blockchain
- endpoints / prices
- 2 / 2
- model
- tiered
- stability
- 100%
risk clean
No deterministic risk flag. Risk fires only on an exact blocklist match, or a reserved-brand name with a mismatched verified payTo. Never from low uptime, a high price, or a model guess.
- domain age
- 43d
- registrar
- Cloudflare, Inc.
- hosting
- custom
- domain created
- 2026-06-29
Identity facts, not a risk score.
traction $0.00 30d · 0 buyers
- volume 30d
- $0.00
- buyers 30d
- 0
- settlements 30d
- 0
- first settlement
- ---
- last settlement
- ---
- top buyer share
- -
- trend 7d vs 30d
- -
- networks
- eip155:8453
- volume all-time
- $0
- settlements all-time
- 0
- median settlement 30d
- -
- max settlement 30d
- -
- settled via
- -
Conservative undercount: only USDC settlements via facilitators we measure are counted. A measured floor, not an estimate.
Top buyer share is a concentration signal, not part of the ranking score.
WHAT IT DOES
ai-derivedNo AI synthesis has been produced for this service yet.
ENDPOINTS
| METHOD | PATH | DESCRIPTION | PRICE | NETWORK | ASSET | 402 CHANNEL |
|---|---|---|---|---|---|---|
| GET | /api/contract-audit | $0.05 | Base | USDC | header | |
| GET | /api/wallet-brief | $0.02 | Base | USDC | header |
REQUEST / RESPONSE EXAMPLE
An unpaid request to GET /api/contract-audit returns HTTP 402 with the payment terms. Settle onchain via your facilitator, then retry with the X-Payment header.
curl -i 'https://zero.broke2builtai.com/api/contract-audit'
// 402 response (captured by monitor) · 2 payloads · click to expand
[
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x510601f59FDa068D70ad6760c9d9085B0F42cbb1",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 3600
}
],
"resource": {
"url": "https://zero.broke2builtai.com/api/contract-audit",
"method": "GET",
"mimeType": "application/json",
"description": "Fetches the verified source of any contract on Base and returns a structured risk report: owner powers, mint/blacklist/pause authority, fee logic, upgradeability, and the specific lines that justify each finding. Returns \"unverified source\" honestly rather than guessing."
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"security",
"audit",
"smart-contracts",
"base",
"blockchain",
"risk"
],
"input": {
"type": "http",
"method": "GET",
"schema": {
"required": [
"contract"
],
"properties": {
"contract": {
"type": "string",
"description": "0x-prefixed contract address on Base mainnet"
}
}
},
"queryParams": {
"contract": "0x4200000000000000000000000000000000000006"
}
},
"output": {
"type": "json",
"example": {
"name": "WETH9",
"report": "## Summary\n...\n## Owner powers\nNo owner: the contract declares no Ownable modifier...\n## What could NOT be determined\n...",
"product": "contract-audit",
"compiler": "v0.8.20+commit.a1b79de6",
"verified_source": true
}
},
"description": "Fetches the verified source of any contract on Base and returns a structured risk report: owner powers, mint/blacklist/pause authority, fee logic, upgradeability, and the specific lines that justify each finding. Returns \"unverified source\" honestly rather than guessing.",
"serviceName": "Contract red-flag report"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"contract"
],
"properties": {
"contract": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "0x-prefixed contract address on Base mainnet"
}
}
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
},
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x510601f59FDa068D70ad6760c9d9085B0F42cbb1",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 3600
}
],
"resource": {
"url": "https://zero.broke2builtai.com/api/wallet-brief",
"method": "GET",
"mimeType": "application/json",
"description": "Plain-language brief on any Base address: age, transaction and transfer counts, token holdings, contract-or-EOA, and what the recent activity pattern suggests."
},
"extensions": {
"bazaar": {
"info": {
"tags": [
"blockchain",
"analytics",
"address",
"base",
"onchain",
"intelligence"
],
"input": {
"type": "http",
"method": "GET",
"schema": {
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"description": "0x-prefixed address on Base mainnet"
}
}
},
"queryParams": {
"address": "0x4200000000000000000000000000000000000006"
}
},
"output": {
"type": "json",
"example": {
"facts": {
"is_contract": false,
"token_count": 3,
"recent_tx_count": 12,
"coin_balance_wei": "0",
"has_token_transfers": true
},
"report": "This address is an EOA with ... Recent activity is dominated by ...",
"product": "wallet-brief"
}
},
"description": "Plain-language brief on any Base address: age, transaction and transfer counts, token holdings, contract-or-EOA, and what the recent activity pattern suggests.",
"serviceName": "Address activity brief"
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"address"
],
"properties": {
"address": {
"type": "string",
"pattern": "^0x[a-fA-F0-9]{40}$",
"description": "0x-prefixed address on Base mainnet"
}
}
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string",
"const": "json"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 2
}
] OVER TIME
All charts use the 30d selector; each series spans only the dates it has data for. Every series is also served as JSON at /api/v1/services/zero/price, /scores, /volume and /buyers. On-chain volume and distinct buyers are measured over the service's settlement address and are a conservative undercount (only settlements that reach a measured facilitator are counted). The on-chain series roll up hourly, so the latest day can be up to about an hour behind; distinct buyers are counted per payout address, so a service that settles to more than one address is an upper bound.
Median across 2 endpoints. Use the selector to isolate one.
checklist grew 11->14 on 2026-07-28; a step here is a metric change, not a regression
Measured site and economics pillars from the assessment history, so the latest value shown elsewhere on this page reads as a point on a trend rather than a permanent state.
COMPLIANCE
14/14 checks pass · grade Alast 402 captured 2026-07-28 · last up 2026-08-13
- 402 payload captured
- accepts[] array present
- payTo address recoverable
- payTo at accepts[0].payTo (conformant shape)
- payTo is a valid on-chain address
- atomic price declared
- atomic price in a sane range
- asset (token) address declared
- network resolves to CAIP-2
- payment scheme declared
- served over HTTPS
- declares the current x402 version (2)
- EIP-712 domain parameters present on every EVM entry
- x402 v2 envelope delivered in the payment-required header
SITE PILLARS
- homepage reachable
- openapi doc
- pricing page
- llms.txt
- robots.txt
- terms page
recent checks (18) live · click to expand
EMBED THIS BADGE
<a href="https://x402-list.com/services/zero?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/zero.svg" alt="ZERO listed on x402-list" height="28"> </a>
[](https://x402-list.com/services/zero?utm_source=badge&utm_medium=referral&utm_campaign=embed)
<a href="https://x402-list.com/services/zero?utm_source=badge&utm_medium=referral&utm_campaign=embed"> <img src="https://x402-list.com/badge/zero.svg?data=uptime" alt="ZERO uptime on x402-list" height="28"> </a>