QuickBuild
Live crypto prices for up to 25 coins per call: pass tickers in `symbols` (BTC,ETH,SOL,AERO,...; common tickers built in, others resolved by CoinGecko search to the largest coin with that ticker), CoinGecko `ids`, or one token `address` + `chain` (base default; ethereum, arbitrum, optimism, polygon, bsc, avalanche, solana). Returns price, market cap, 24h volume and 24h % change in each `vs` currency (usd default; up to 5, e.g. usd,eur,btc) plus last-updated time. Data: CoinGecko public API,...
SearchLiveeip155:8453Exactvia cdp
CryptoPriceMarket-dataTokenDefi
Calls · 30d
2
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 snapshots so far.
$0.18
Verified settled volume
26 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-10-24 16:37Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x751a4c3841bE287544C371B4EE09Bd3366AeA7cfThe 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "Payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://quickbuild.quynguyenbac.workers.dev/api/crypto/price",
"description": "Live crypto prices for up to 25 coins per call: pass tickers in `symbols` (BTC,ETH,SOL,AERO,...; common tickers built in, others resolved by CoinGecko search to the largest coin with that ticker), CoinGecko `ids`, or one token `address` + `chain` (base default; ethereum, arbitrum, optimism, polygon, bsc, avalanche, solana). Returns price, market cap, 24h volume and 24h % change in each `vs` currency (usd default; up to 5, e.g. usd,eur,btc) plus last-updated time. Data: CoinGecko public API,...",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"vs": "usd",
"symbols": "BTC,ETH"
},
"discoverable": true
},
"output": {
"type": "json",
"example": {
"vs": [
"usd"
],
"count": 2,
"prices": [
{
"id": "bitcoin",
"price": {
"usd": 82741.26
},
"symbol": "BTC",
"marketCap": {
"usd": 1663035412060
},
"volume24h": {
"usd": 27544716493
},
"lastUpdated": "2026-10-21T01:19:29.000Z",
"change24hPct": {
"usd": 1.74
}
},
{
"id": "ethereum",
"price": {
"usd": 2443.38
},
"symbol": "ETH",
"marketCap": {
"usd": 298503007461
},
"volume24h": {
"usd": 11514544134
},
"lastUpdated": "2026-10-21T01:19:29.000Z",
"change24hPct": {
"usd": 2.42
}
}
],
"source": "coingecko",
"notFound": [],
"fetchedAt": "2026-10-21T01:19:31.000Z",
"cacheSeconds": 30
}
}
},
"maxAmountRequired": "1000",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://quickbuild.quynguyenbac.workers.dev/api/crypto/price",
"tags": [
"crypto",
"price",
"market-data",
"token",
"defi"
],
"mimeType": "application/json",
"description": "Live crypto prices for up to 25 coins per call: pass tickers in `symbols` (BTC,ETH,SOL,AERO,...; common tickers built in, others resolved by CoinGecko search to the largest coin with that ticker), CoinGecko `ids`, or one token `address` + `chain` (base default; ethereum, arbitrum, optimism, polygon, bsc, avalanche, solana). Returns price, market cap, 24h volume and 24h % change in each `vs` currency (usd default; up to 5, e.g. usd,eur,btc) plus last-updated time. Data: CoinGecko public API,...",
"serviceName": "QuickBuild"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"vs": "usd",
"symbols": "BTC,ETH"
}
},
"output": {
"type": "json",
"example": {
"vs": [
"usd"
],
"count": 2,
"prices": [
{
"id": "bitcoin",
"price": {
"usd": 82741.26
},
"symbol": "BTC",
"marketCap": {
"usd": 1663035412060
},
"volume24h": {
"usd": 27544716493
},
"lastUpdated": "2026-10-21T01:19:29.000Z",
"change24hPct": {
"usd": 1.74
}
},
{
"id": "ethereum",
"price": {
"usd": 2443.38
},
"symbol": "ETH",
"marketCap": {
"usd": 298503007461
},
"volume24h": {
"usd": 11514544134
},
"lastUpdated": "2026-10-21T01:19:29.000Z",
"change24hPct": {
"usd": 2.42
}
}
],
"source": "coingecko",
"notFound": [],
"fetchedAt": "2026-10-21T01:19:31.000Z",
"cacheSeconds": 30
}
}
},
"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"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"vs": {
"type": "string",
"description": "Comma-separated quote currencies (max 5), e.g. usd,eur,btc. Default usd."
},
"ids": {
"type": "string",
"description": "Comma-separated CoinGecko coin ids, e.g. bitcoin,aerodrome-finance (optional)."
},
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon",
"bsc",
"avalanche",
"solana"
],
"type": "string",
"description": "Chain of `address` (default base)."
},
"address": {
"type": "string",
"description": "Optional token contract address; returns that token price (overrides symbols/ids)."
},
"symbols": {
"type": "string",
"description": "Comma-separated tickers, e.g. BTC,ETH,SOL (max 25). Optional: defaults to BTC,ETH."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"vs": {
"type": "array",
"items": {
"type": "string"
}
},
"count": {
"type": "integer"
},
"prices": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": [
"string",
"null"
]
},
"price": {
"type": "object",
"description": "vs currency -> price"
},
"symbol": {
"type": [
"string",
"null"
]
},
"marketCap": {
"type": [
"object",
"null"
]
},
"volume24h": {
"type": [
"object",
"null"
]
},
"lastUpdated": {
"type": [
"string",
"null"
]
},
"change24hPct": {
"type": [
"object",
"null"
]
}
}
}
},
"source": {
"type": "string"
},
"notFound": {
"type": "array",
"items": {
"type": "string"
}
},
"fetchedAt": {
"type": "string"
}
}
}
}
}
}
}
}
},
"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.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0x751a…eA7cf. The signed payment is good for 5 minutes.
- Paid to
- 0x751a…eA7cf
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x751a4c3841bE287544C371B4EE09Bd3366AeA7cf",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"vs": "usd",
"symbols": "BTC,ETH"
}
},
"output": {
"type": "json",
"example": {
"vs": [
"usd"
],
"count": 2,
"prices": [
{
"id": "bitcoin",
"price": {
"usd": 82741.26
},
"symbol": "BTC",
"marketCap": {
"usd": 1663035412060
},
"volume24h": {
"usd": 27544716493
},
"lastUpdated": "2026-10-21T01:19:29.000Z",
"change24hPct": {
"usd": 1.74
}
},
{
"id": "ethereum",
"price": {
"usd": 2443.38
},
"symbol": "ETH",
"marketCap": {
"usd": 298503007461
},
"volume24h": {
"usd": 11514544134
},
"lastUpdated": "2026-10-21T01:19:29.000Z",
"change24hPct": {
"usd": 2.42
}
}
],
"source": "coingecko",
"notFound": [],
"fetchedAt": "2026-10-21T01:19:31.000Z",
"cacheSeconds": 30
}
}
},
"schema": {
"type": "object",
"$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"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [],
"properties": {
"vs": {
"type": "string",
"description": "Comma-separated quote currencies (max 5), e.g. usd,eur,btc. Default usd."
},
"ids": {
"type": "string",
"description": "Comma-separated CoinGecko coin ids, e.g. bitcoin,aerodrome-finance (optional)."
},
"chain": {
"enum": [
"base",
"ethereum",
"arbitrum",
"optimism",
"polygon",
"bsc",
"avalanche",
"solana"
],
"type": "string",
"description": "Chain of `address` (default base)."
},
"address": {
"type": "string",
"description": "Optional token contract address; returns that token price (overrides symbols/ids)."
},
"symbols": {
"type": "string",
"description": "Comma-separated tickers, e.g. BTC,ETH,SOL (max 25). Optional: defaults to BTC,ETH."
}
}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"properties": {
"vs": {
"type": "array",
"items": {
"type": "string"
}
},
"count": {
"type": "integer"
},
"prices": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": [
"string",
"null"
]
},
"price": {
"type": "object",
"description": "vs currency -> price"
},
"symbol": {
"type": [
"string",
"null"
]
},
"marketCap": {
"type": [
"object",
"null"
]
},
"volume24h": {
"type": [
"object",
"null"
]
},
"lastUpdated": {
"type": [
"string",
"null"
]
},
"change24hPct": {
"type": [
"object",
"null"
]
}
}
}
},
"source": {
"type": "string"
},
"notFound": {
"type": "array",
"items": {
"type": "string"
}
},
"fetchedAt": {
"type": "string"
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-10-24 16:37Z
- Last indexed by Roundhouse
- 2026-10-26 17:20Z
- Last enriched (probe, favicon, geo)
- 2026-10-21 15:46Z
- 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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 15 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 QuickBuild 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=QuickBuild' 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://quickbuild.quynguyenbac.workers.dev/api/crypto/price, 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.